md-mt877/md-mt877c service manual - minidisc

MD-MT877/MD-MT877C

CONTENTSPage

SPECIFICATIONS ................................................................................................................................................................. 2NAMES OF PARTS ............................................................................................................................................................... 3OPERATION MANUAL .......................................................................................................................................................... 5DISASSEMBLY .................................................................................................................................................................... 10REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11ADJUSTMENT ...................................................................................................................................................................... 12NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 28TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 28BLOCK DIAGRAM ............................................................................................................................................................... 29SCHEMATIC DIAGRAM ...................................................................................................................................................... 30WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 32VOLTAGE ............................................................................................................................................................................ 36WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 37TROUBLESHOOTING ......................................................................................................................................................... 38FUNCTION TABLE OF IC.................................................................................................................................................... 41PARTS GUIDE/EXPLODED VIEWPACKING OF THE SET (MD-MT877(S) FOR U.S.A. ONLY)

SERVICE MANUAL

SHARP CORPORATION

No. S3118MDMT877/

This document has been published to be usedfor after sales service only.The contents are subject to change without notice.

MD-MT877(S)MODEL MD-MT877C(S)

• In the interests of user-safety the set should be restored to itsoriginal condition and only parts identical to those specified beused.

PORTABLE MINIDISC RECORDER

– 2 –

MD-MT877/MD-MT877C

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TOTHE OPERATION MANUAL.

Specifications for this model are subject to change without priornotice

SPECIFICATIONSPower source DC 1.2V: Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1

DC 5V: AC adaptor (AC 120V, 60 Hz)DC 1.5V: Commercially available, “AA” size (LR6), alkaline battery x 1DC 1.5V: Separately available car adaptor, AD-CA55X (for cars with a 12-24V DC negative ground electrical sys-

tem) (Used with separately available plug adaptor (AD-M66PA))Power consumption 7 W (AC adaptor)Output power RMS; 10 mW (5 mW + 5 mW) (0.2% T.H.D.)Charging time Approx. 3.5 hoursInput sensitivity MIC H: reference input level 0.25 mV input impedance 10 k ohms

MIC L: reference input level 2.5 mV input impedance 10 k ohmsLINE: reference input level 100 mV input impedance 20 k ohms

Output level Earphones: maximum output level 5 mW + 5 mW load impedance 32 ohmsLINE: specified output 250 mV (-12 dB) load impedance 10 k ohms

Dimensions Width: 2-27/32” (71.9 mm) Height: 11/16” (16.8 mm) Depth: 3-1/8” (78.7 mm)Weight 0.29 lbs. (131 g) with rechargeable battery

Input jack Line/optical digital, microphone (powered by the main unit)Output jack Earphones (impedance: 32 ohms)/remote control unitType Portable MiniDisc recorderSignal readout Non-contact, 3-beam semiconductor laser pickupAudio channels Stereo 2 channels/monaural (long-play mode) 1 channelFrequency response 20 – 20,000 Hz (± 3 dB)Rotation speed Approx. 400 – 1,350 rpmError correction ACIRC (Advanced Cross Interleave Reed-Solomon Code)Coding ATRAC/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed typeRecording method Magnetic modulation overwrite methodSampling frequency 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)Wow and flutter Unmeasurable (less than ±0.001% W. peak)

Battery life

● The above values are the standard values when the unit is operated hori-zontally and charged at an ambient temperature of 77°F (25°C). (Theoperable duration with the rechargeable battery will be shorter when theunit is carried around.)

● The volume level is set at “VOL 15”.

● The LED is set at “LIGHT OFF”.

● Operable duration with a commercially available battery varies depend-ing on its maker, type, and conditions of use.

● “Fully charged” means that the charging is complete after approximately3.5 hours since the remaining amount of the battery is reduced to “ ”(1 bar).

When using the rechargeable battery(fully charged) included with the unit

When using one, commercially avail-able, high capacity, “AA” size (LR6), al-kaline battery (The rechargeable bat-tery is in the unit, discharged.)When using one, commercially avail-able, high capacity, “AA” size (LR6), al-kaline battery with the rechargeable bat-tery (fully charged)

Stereo 2 times long 4 times longContinuous Continuous Continuous Continuous Continuous Continuousrecording: play: recording: play: recording: play:Approx. Approx. Approx. Approx. Approx. Approx.6.5 hours 12 hours 9 hours 13.5 hours 11.5 hours 15 hoursContinuous Continuous Continuous Continuous Continuous Continuousrecording: play: recording: play: recording: play:Approx. Approx. Approx. Approx. Approx. Approx.6 hours 16 hours 10 hours 19.5 hours 13 hours 22 hoursContinuous Continuous Continuous Continuous Continuous Continuousrecording: play: recording: play: recording: play:Approx. Approx. Approx. Approx. Approx. Approx.15 hours 29 hours 22 hours 33 hours 30 hours 40 hours

– 3 –

MD-MT877/MD-MT877C

NAMES OF PARTS

Main unit1. Record/Track Mark Button2. Mode Button3. Volume/Cursor/Fast Forward/Fast Reverse/

Recording Level/Name Select Button4. Stop/Power Off/Hold Button5. Open Lever6. Display/Character Select Button7. Edit/Auto Mark/Time Mark Button8. Play/Pause Button9. Enter/Fast Play/Synchro Button

10. Bass/Delete Button11. Rechargeable Battery Cover12. Handstrap Holder13. Optical/Line Input Jack14. Microphone Input Jack15. Remote Control/Earphones/Line Output Jack

1. Level Meter02. Record Indicator03. Synchro Recording Indicator04. Operation Indicator05. Long-play/Recording Mode Indicator6. Character/Time Information Indicator7. Repeat Indicator8. Battery Indicator9. Random Indicator

10. Track Number Indicator11. TOC Indicator12. Disc Name Indicator

Main unit display panel

3-color LEDVarious modes are indicated with three colors of lights.

Charging Lighting starting with yellow-green light.Refresh Extinguishing starting with orange light

after all the lights are lit.Playback Flashing the color of the activated play-

back mode.Recording Flashing the color of the activated re-

cording mode.Fast Forward Flashing starting with yellow-green light.Fast Reverse Flashing starting with orange light.Volume (+) Lighting starting with yellow-green light.Volume (–) Extinguishing instantly starting with or-

ange light after all the lights are lit.TOC Reading: flashing at random.

1314

15

12

21

3 4

56

7

89

10

11

123456

789101112

BlueYellow-

green Orange

– 4 –

MD-MT877/MD-MT877C

1. Record Indicator02. Track Number Indicator03. Operation Indicator04. Character/Time Information Indicator05. Battery Indicator06. Random Indicator07. Synchro Recording Indicator08. Total Track Number Indicator09. Long-play/Recording Mode Indicator10. Repeat Indicator

Remote control display panel

Remote control unit

1. Earphones Jack2. Fast Forward/Fast Reverse Button3. Display Button4. Play Mode Button5. Sound/Track Mark Button

6. Stop/Power Off Button7. Play/Pause Button8. Volume Button

9. Hold Switch

1. Remote Control Holder(You can hang the remote control on it.)

2. Lock Detector3. Hook For Fixing The Main Unit4. Charge/Operation Switch5. Stand6. AC Adaptor Connecting Jack

Battery charger

1

86 7 9

2 3 4 5

1 2 3 4 5 6

7 8 9 10

1

456

3

2

CHARGE

OPERATION

– 5 –

MD-MT877/MD-MT877C

OPERATION MANUAL

Using with the Rechargeable BatteryCharging

When the rechargeable battery is used for the firsttime or when you want to use it after a long period ofdisuse, be sure to charge it fully.

● After the rechargeable battery is charged or used, it willget slightly warm. This is normal.

● When the portable MD is turned on or operating, the bat-tery will not be charged.

AC 120V60Hz

Chargemode

Do not force thebattery coveropen too far.

1 Insert the rechargeable battery.

2 Move the Charge/Operation switch tocharge mode.

3 Place the portable MD into the batterycharger and connect the AC adaptor.

To the DC IN5V jack

Checking the remaining amount ofbattery level

The remaining amount of battery level is shownby the battery indicator ( ) during operation.

● When the battery is completely discharged, the batteryindicator will flash. Recharge the battery or replace thealkaline battery with a new one.

● When the battery has run completely out, “BATT EMPTY(LoBATT)” will appear. Then, the power will be discon-nected automatically.

Notes:● If you use the battery which you stopped charging half-

way, “ ” may appear. It does not mean that the bat-tery is completely charged.

● The battery indicator will not correctly display the remain-ing capacity for approximately 20 seconds after the powerhas been turned on.

● When the AC adaptor or a separately available car adap-tor is used, the battery indicator will not be shown.

● The number of bars shown in the battery indicator mayincrease or decrease, depending on the operation be-ing performed. This is normal.

Checking Displays

When the batterylevel is high

When the batterylow is very low

How to read the battery indicator

– 6 –

MD-MT877/MD-MT877C

Error MessagesERROR MESSAGES

BATT EMPTY(LoBATT)

BLANK MD(BLANK)

Can’t COPY(Can’tC)

Can’t EDIT(Can’tE)

Can’t READ *(Can’tS)(Can’tT)(Can’tU)

Can’t REC(Can’tR)

Can’t STAMPCan’t WRITE(Can’tW)

CHARGEmode

DEFECT(DEFECT)

DISC FULLEr-MD **(ErMD*)HOLD(HOLD)

LOCKED(Can’tLOCK)

MEANING

● The battery is run down.

● Nothing is recorded.

● You tried to record from a copy prohibitedMiniDisc.

● A track cannot be edited.

● The disc data cannot be read because the discis damaged.

● Recording cannot be performed correctly due tovibration or shock.

● Stamp function does not work.● Cannot save the TOC information correctly to a

MiniDisc. (A large portion of the disc has beendamaged.)

● The Charge/Operation switch is not set to theoperation mode when using this unit with the ACadaptor.

● The disc is scratched.

● The disc is out of recording space.● The microprocessor has reported a system fault

and the unit is out of order.● The unit is in the hold mode.

● You removed a MiniDisc while recording orediting.

REMEDY

● Charge the rechargeable battery or replace the alka-line battery (or use the AC adaptor for power).

● Replace the disc with a recorded disc.

● Record using the analog cable. (MD-MT877(S))● Record using the analogue cable. (MD-MT877C(S))● Change the stop position of the track and then edit it.

● Reload the disc.● Replace it with another recorded disc.

● Re-record or replace it with another recordable disc.

● Check the number of tracks.● Replace the disc with another recordable disc.

● Set the Charge/Operation switch to the operation mode.

● If the sound you hear is not right, record again.● Replace the disc with another recordable disc.● Replace it with another recordable disc.● To have it repaired, go to the distributor where you pur-

chased the unit.● Return the HOLD switch to its original position.

● Turn off the power and remove the MiniDisc.

Error Messages : continuedERROR MESSAGES

NO DISCNO SIGNAL(noSIG.)

PLAY MD(PLAYmd)

POWER ?

PROTECTED

SORRY(Sorry)

TEMP OVER(TEMP!)

TOC FORM **(Tform**)

TOC FULL

Tr. Protect? DISC(? DISC)

MEANING

● A disc has not been loaded.● Poor connection of the digital cable.● No output signal comes out from the connected

unit to playback.● The input signal has improper sampling fre-

quency.● You recorded on a playback-only disc.

● The battery charger is defective.

● The write protection tab of a MiniDisc is set tothe protected position.

● You tried to record on a playback-only disc.● Since a track number is currently being located

or updated, the unit cannot accept your com-mand.

● The temperature is too high.

● There is an error in the recording signal.

● There is no space left for recording characterinformation (track names, disc names, etc.).

● The track has been protected from being erased.● A disc which contains data other than music was

played.● There is an error in the signal recorded on the

disc.● Stamping is not possible.

REMEDY

● Load a disc.● Connect the digital cable securely.● If the portable CD player has a function to prevent sound

skips, deactivate it.● Playback with the connected unit.

● Replace it with a recordable disc.

● To have it repaired, go to the distributor where youpurchased the unit.

● Move the write protection tab back to its original position.● Replace it with a recordable MiniDisc.

● Wait for a while and try the operation again.

● Turn off the power, and wait for a while.

● Erase all of the tracks, and then record again.

● Replace it with another recordable disc.

● Edit the track with the device on which it was recorded.

● A disc which contains non-music data cannot be played.● Replace it with another recorded disc.

● Retry.

( ) : Error messages seen on the remote control.Number or symbol appears in * position.

– 7 –

MD-MT877/MD-MT877C

The unit may have the following symptoms while recording or editing. The unit is not out of order.

MiniDisc System Limitations

SYMPTOM

“DISC FULL” or “TOC FULL” appearseven though the MiniDisc still has re-cording time left.

The remaining recording time does notincrease even though you erased tracks.

The total of the recorded time and theremaining time does not match the maxi-mum recordable time.

Combine function does not work.

Sound skips in fast reverse/forward.

A track number is created in the middleof a track.

LIMITATIONS

More than 255 tracks (maximum) cannot be recorded regardless of the re-cording time.If the MiniDisc is recorded or edited repeatedly or if it has scratches (record-ing skips scratched parts), you may not be able to record the maximumtracks above.

The unit does not count non-recorded portions that last 12 or fewer secondsto display the remaining recording time. The time may not increase even ifyou erase short tracks.

One cluster (approximately 2 seconds) is the minimum unit for recording.For example, a 3-second track uses 2 clusters (approximately 4 seconds).Therefore, the actual recordable time may be shorter than the displayedtime.

A MiniDisc on which recording and editing are repeated may not allow thecombine function.

One track is divided and recorded in separate places on a repeatedly re-corded or edited MiniDisc.Sound may skip.

A track number may be created if there are scratches or dust on the MiniDisc.

TroubleshootingMany potential “problems” can be resolved by the owner without calling a service technician.If something seems to be wrong with this product, check the following before calling your authorized SHARP dealer orservice center.

The unit does notturn on.

No sound isheard from theearphones.

When the opera-tion buttons arepressed, the unitdoes not respond.

Some soundsare skipped.

● Is the AC adaptor disconnected?● Is the battery exhausted?● Is the unit in the hold mode?● Has condensation formed inside the

unit?● Is the unit being influenced by me-

chanical shock or by static electric-ity?

● Is the volume set too low?● Is the remote control unit or the ear-

phones plugged in?● Are you trying to play a MiniDisc with

data on it instead of a MiniDisc contain-ing music?

● Is the unit in the hold mode?● Is the battery exhausted?● Is the remote control unit plug or the

earphones plug inserted firmly?

● Is the battery exhausted?● Is the unit being subjected to exces-

sive vibration?

● Has the track number or characterinformation been updated on thedisc yet?

● Is the unit in the recording or edit-ing mode?

● Is the MiniDisc protected againstaccidental erasure?

● Is the unit connected properly to theother equipment?

● Is the AC adaptor unplugged or did apower failure occur while recording orediting?

● Is the unit in the hold mode?● Is an optical signal being output from

the stereo system?Read the operation manual for thestereo system.

● Is the select switch for charging/operation set on the charging side?

● Is the jack clean?

● Is the remote control display set to“LIGHT OFF”?

The MiniDisc can-not be ejected.

Recording andediting are im-possible.

The battery cannotbe charged.

Nothing appearson the remotecontrol display.

PROBLEM CAUSE PROBLEM CAUSE

– 8 –

MD-MT877/MD-MT877C

33

1

22244

1 Insert a MiniDiscInserte un minidisco

1 Slide the OPEN lever to re-lease the compartment door.Deslice la palanca OPEN paraabrir la puerta del comparti-miento.

2 Lift it up.Levantelo.

3 Insert a MiniDisc as shown.Inserte un minidisco como semuestra.

4 Close the compartment.Cierre el compartimiento.

When you record on a MiniDisc,check that the erase prevention tabis set to the “recordable” position.

Cuando desee grabar en unminidisco, compruebe que lalengüeta de protección contraborrado esté colocada en la posiciónpara "poder grabar".

Insert according to the direction of the arrow.

Insértelo de acuerdo con la dirección de la flecha.

RecordablePara podergrabar

RecordingpreventedPara no podergrabar

Before using the unit with a rechargeable battery, the battery has to be charged. Referto “Using with the rechargeable battery”.Antes de emplear el aparato con una batería recargable, se deberá cargar labatería. Consulte el apartado de "Empleo con la batería recargable".

1 Move the Charge/Operationswitch to Charge mode (RE-LEASE).Mueva el selector de carga/operación al modo de carga(RELEASE).

2 Insert the portable MD intothe battery charger.Inserte el MD portátil en elcargador de baterías.

3 Move the Charge/Operationswitch to Operation mode(LOCK).Mueva el selector de carga/operación al modo de operación(LOCK).

4 Plug the AC adaptor.Enchufe el adaptador de CA.

2 Connect the AC adaptorConecte el adaptador de CA

RELEASE

LOCK

To the DC IN 5V jack

A la toma DC IN 5V

AC 120V, 60 Hz

120V CA, 60Hz

Insert securely, all the way in.

Insértelo con seguridad a fondo.

To an AC outlet

A un tomacorrientede CA

LINE OUT

LEFTRIGHT

OPTICAL/LINE IN

White: To LeftBlanco: A laizquierda

Red: To RightRojo: A laderecha

3 ConnectionConexión

To a stereo system with “LINE OUT” or “AUDIO OUT”jacks (See left. Analog connection)Note:If the audio system has only one pair of jack then they are usuallyinput only and recording via this connection is not possible.

A un sistema estéreo provisto de tomas de salida delínea "LINE OUT" o de salida de audio "AUDIO OUT"(Vea a la izquierda, Conexión analógica)Nota:Si el sistema de audio sólo tiene un par de tomas, normalmenteson sólo de entrada y no puede realizarse la grabación medianteesta conexión.

Preparation for usePreparación para su utilización

The unit does not work if the • / –HOLD button is set to HOLD.Este aparato no funciona si el botón • / –HOLD está puesto en HOLD.

HoldRetención

ReleasedLiberación

CAUTION:It is not recommendable to put the MiniDisc into a rearpocket, as this may damage the product when sitting.

PRECAUCIÓN:No se recomienda ponerse un minidisco en el bolsillotrasero del pantalón, porque podría dañarlo al sentarse.

For operationsPara operaciones

Move it to operation mode when playing back or recording.Muévalo a la posición del modo de operación para la reproducción o grabación.

Operation mode

Modo de operación

Press the • / –HOLD button for 2 seconds or more.Pulse el botón • /–HOLD durante 2 o más segundos.

– 9 –

MD-MT877/MD-MT877C

RecordingGrabaciónCheck that the unit is connected to the stereo system.Compruebe que el aparato esté conectado al sistema estéreo.

1 Press the REC button.Pulse el botón REC.

2 Begin playback on the stereo system connected to this unit.Inicie la reproducción en el sistema estéreo conectado a este aparato.

3 Press the or button to adjust the recording level.Adjust the recording level so that the maximum sound volume from thesource makes the reading swing somewhere between –4 dB and 0 dB.Pulse el botón o para ajustar el nivel de grabación.Ajuste el nivel de grabación para que el volumen de sonido máximo de la fuenteproduzca una indicación de entre –4 dB y 0 dB.

0dB

4dB

Level meter indicatorIndicador del medidor de nivel

To stop recordingPress the • / :OFF button.When recording stops, “TOC” appears(Table Of Contents). While “TOC” ap-pears, the MiniDisc recorded contentshave not yet been updated.

Para detener la grabaciónPulse el botón • /:OFF.Cuando se detenga la grabación,aparecerá “TOC” (índice). Mientrasaparece “TOC”, aún no se habráactualizado el contenido grabado en el MD.

4 Press the PAUSE button on the stereo system to enter the play-back pause mode at the point you wish to start recording.Pulse el botón PAUSE del sistema estéreo para entrar en el modo de pausade reproducción en el punto en el que desee iniciar la grabación.

5 Press the MODE button repeatedly to select the recording mode.Pulse repetidamente el botón MODE para seleccionar el modo de grabación.

6 Press the button to start recording.Pulse el botón para iniciar la grabación.

7 Begin playback on the stereo system, the output will be recorded.Inicie la reproducción del sistema estéreo, y se grabará la salida.

To update the recorded contentsof the MiniDiscPress the • / :OFF button while inthe stop mode.The power turns off after recordedcontents have been updated on theMiniDisc.

Para actualizar el contenidograbado del MDPulse el botón • /:OFF en el modo deparada.La alimentación se desconectará despuésde haber actualizado el contenido grabadoen el MD.

TOC displayVisualizaciónTOC

PlayingReproducción

1 Insert the earphones plug firmly into the earphones jack onthe remote control unit.Inserte firmemente la clavija de los auriculares en la toma de auriculares delcontrolador remoto.

2 Plug the remote control into the jack on the unit.Enchufe el controlador remoto a la toma del aparato.

3 Insert a MiniDisc.Inserte un MD

4 Press the button.Pulse el botón .

To stop playbackPress the • / :OFF button (Remotecontrol: press the button).If the unit is not operated for at least 2minutes while in the stop mode, thepower will shut off automatically.

Para detener la reproducciónPulse el botón • /:OFF. (Controladorremoto: pulse el botón .)Si el aparato no se utiliza durante unmínimo de 2 minutos en el modo deparada, la alimentación se desconectaráautomáticamente.

– 10 –

MD-MT877/MD-MT877C

1 Bottom Cabinet 1. Screw ..................... (A1) x5 10-1

2 Top Cabinet 1. Open the Top cabinet. 10-12. Screw ..................... (B1) x43. Flexible PWB .......... (B2) x1 10-2

3 Main PWB 1. Open the rechargeable 10-2battery compartment of thedirection indicated by arrows.

2. Screw .................... (C1) x13. Flexible PWB ......... (C2) x2

4 MD Mechanism 1. Pull the main frame to the A 10-3 direction and remove the MD

mechanism upward.2. Screw .................... (D1) x1

5 LCD PWB 1. Screw ...................... (E1) x6 10-42. Hook ....................... (E2) x4

DISASSEMBLY

Cares before disassemblingWhen assembling the machine after disassembling orrepair, observe the following requirements so as to ensuresafety and performance.1. Remove the batteries from the machine, and take out the

mini-disc.2. When assembling after repair, be sure to position the

wires in the same location.Use the specified screws to fix the cabinet and themechanism unit. The use of the screws with length otherthan specified may cause contact with the mechanismunit resulting in malfunction.

3. When repairing, pay close attention so not to damage theIC from static electricity.

REMOVAL PROCEDURESTEP FIGURE

Figure 10-1

Figure 10-2

Figure 10-4

Caution:Carefully handle the main PWB and flexible PWB. After removing theflexible PWB (1*) for the optical pickup from the connector, do nottouch directly the front end of flexible PWB with your hand so as toprevent damage of optical pickup by static electricity.

Figure 10-3

OPENOPEN

OPEN

Top Cabinet

Bottom Cabinet

EJECTKnob

(B1) x 2ø 1.4 x 2 mm

(B1) x 2ø 1.4 x 2 mm

(A1) x 1ø 1.4 x 2 mm

(A1) x 1ø 1.4 x 2 mm

(A1) x 1ø 1.4 x 2 mm

(A1) x 2ø 1.4 x 2 mm

OPEN

(C1) x 1ø 1.4 x 2.5 mm

(C2) x 1(1*)

(C2) x 1(B2) x 1

pull

pull

BatteryCover

Main Frame

Main PWB

1

2OPEN

A

Main Frame

MD Mechanism

OPEN

(D1) x 1ø 1.4 x 1.5 mm

(E1) x 6ø 1.4 x 2 mm

(E2) x 4 LCD PWB

Top Cabinet

– 11 –

MD-MT877/MD-MT877C

REMOVING AND REINSTALLING THE MAIN PARTSRemove the mechanism according to the disassembling meth-ods 1 to 4. (See Page 10.)

Figure 11-1

Figure 11-2

Figure 11-3

How to reinstall the optical pickup(See Fig. 11-4.)1. Remove the screw (E1) x 1 pc., and remove the grip spring.2. Remove the screw (E2) x 1 pc. to remove the thrust

spring, and remove the drive screw and the opticalpickup from MD mechanism.Then, remove the drive screw from the optical pickup.

How to remove the magnetic head (See Fig. 11-4.)1. Remove the screws (D1) x 2 pcs. of the magnetic head and

the optical pickup, and remove the solder joints (D2) x 2 pcs.of the head flexible plate.

Note:Mount carefully so as not to damage the magnetic head.

Figure 11-4

How to remove the lift motor (See Fig. 11-2.)1. Remove the solder joints (B1) x 2 of lift motor lead wire.2. Remove the screw (B2) x 1 pc., and remove the lift motor.Note:Take care so that the motor gear is not damaged.(If the gear is damaged, noise is caused.)

How to remove the sled motor (See Fig. 11-3.)1. Remove the stop washer (C1) x 1 pc., and remove the drive

gear (C2) x 1 pc.2. Remove the screws (C3) x 2 pcs.3. Remove the solder joints (C4) x 3 of flexible PWB., and

remove the sled motor.Note:Take care so that the motor gear is not damaged.(If the gear is damaged, noise is caused.)

How to remove the spindle motor (See Fig. 11-1.)1. Remove the solder joints (A1) x 4 of flexible PWB.2. Remove the screws (A2) x 3 pcs., and remove the spindle

motor.

(A2) x 3ø 1.4 x 3 mm

MD Mechanism

Spindle Motor

Solder joints(A1) x 4

MD Mechanism

(B2) x 1ø 1.4 x 3.8 mm

Solder Joints(B1) x 2

Lift Motor

(C1) x 1(C2) x 1

(C3) x 2ø 1.4 x 1.2 mm

SledMotor

(C4) x 3SolderJoints

MD Mechanism

(E1) x 1ø 1.4 x 1.8 mm

(D2)x2Solder Joints

MD Mechanism

(E2) x 1ø 1.7 x 3.5 mm

Grip Spring (D1) x 2ø1.4 x 1.8 mm

Optical Pickup

DriveScrew

ThrustSpring

Magnetic head

MD-MT877/MD-MT877C

– 12 –

Entering the TEST mode1. Setting at port (in standby state, disc-free state or power

nonconnected state)(1) Set the port as follows. TEST1 : "Low" TEST0 : "High"(2) Press the PLAY button in the standby state (it is allowed to

close the disc lid or to connect the power supply).(3) Test Mode STOP [ T E S T _ ]

1 High reflection disc MMD-110 88GMMD-110(TEAC Test MD)

2 Low reflection disc MMD-213A 88GMMD-213A(TEAC Test MD)

3 Low reflection disc Recording UDSKM0001AFZZminidisc disc

ADJUSTMENT Test discMD adjustment needs two types of disc, namely record-ing disc (low reflection disc) and playback-only disc (highreflection disc).

Type Test disc Parts No.

Note: Use the low reflection disc on which music has beenrecorded.

1. AUTO 1 Mode • Perform preliminary automatic adjustment.• If the combination of mechanism and pickup PWB has been changed, be sure to start from

AUTO1.2. AUTO 2 Mode • Perform ATT (attenuator) automatic adjustment.

• Perform continuous playback (error rate display, jump test)

3. TEST-PLAY Mode • Continuous playback from the specified address is performed.• 1 line, 10 lines or 100 steps manual jump is

performed.• C1 error rate display (pit section), ADIP error

rate display (groove section)• The temperature correction is performed only when

servo start is performed, but the posture correctionis not performed during continuous playback.

4. TEST-REC Mode • Continuous record from the specified addressis performed.

• Change of record laser output (servo gain isalso changed according to laser output).

• The temperature correction is performed onlywhen servo start is performed, but the posturecorrection is not performed during continuousrecording.

5. MANUAL 1 Mode • Temperature is displayed.• Seeing the displayed adjustment value, perform preliminary manual adjustment. (Error rate indication, jump test)

6. MANUAL 2 Mode • Temperature is displayed.• Seeing the displayed adjustment value, perform ATT (attenuator) manual adjustment.• Continuous playback is performed (error rate display, jump test).

7. ERROR INFORMATION • Error information is displayed. Mode • Error information is initialized8. NORMAL Mode • The mode is changed from the TEST mode to

the normal mode without adjustment.• In the normal mode the internal operation mode,

memory capacity, etc. areindicated.• In the normal mode both temperature correction

and posture correction are performed.9. EEPROM Mode • Factors of digital servo are changed manually.

• Cut-off frequency of BASS1, BASS2 and BASS3is selected manually.

• Temperature detection terminal voltage ismeasured, and the reference value is set.

• Defaults are selected and set.• Setting of EEPROM protect area is updated.

2. Setting by special button operation (in standby state)Test mode: Perform it with the remote control.(1) Press and hold the "PLAY MODE" button on the remote control

and press the "PLAY" button.(2) Release only the "PLAY MODE" button.(3) Press and hold only the "PLAY" button and press the "VOL-

UME–" button.(4) Normal mode setting initialization (BASS setting, VOLUME

setting, etc.)(5) Test Mode STOP [ T E S T _ ](6) Press "VOLUME+" to check the microcomputer version.(7) Press "VOLUME–" to light up all the LCDs.

Leaving the TEST mode(1) Press the STOP button in the TEST mode stop state or version

indicating state or whole LCD lighting state.(2) EEPROM rewrite-enable area updating.(3) Change to standby state

Shipping setting method(1) Insert the rechargeable battery. Do not close the compartment.(2) Close the battery lid twice in succession while pressing the

VOLUME– button and the PLAY button on the main unit at thesame time. (Turn on and off the power twice)

(3) Make sure the display changes from [INIT] to [BYE OK].

Test Mode

MD-MT877/MD-MT877C

– 13 –

Operation in each TEST mode1. AUTO1 Mode• When the STOP button is pressed while the AUTO1 menu appears

or during automatic adjustment, the mode changes to the TESTmode stop state. At this time the adjustment value is not output.

• Be sure to adjust, using the specified disc MMD-213A.• Adjustment NG; Adjustment item out of range, focus ON failure, and

adjustment error• When the PLAY button is pressed while ADJ. OK is displayed, AU-

TO2 is executed.

2. AUTO2 Mode• When the STOP button is pressed while the AUTO2 menu appears

or during automatic adjustment, the mode changes to the TESTmode stop state. At this time the adjustment value is not output.

• Adjustment NG; Adjustment item out of range, and adjustment error.• When the PLAY button is pressed while ADJ. OK is displayed, TEST

_PLAY is executed.

3. MANUAL1 Mode• Adjustment item to be made in AUTO1 mode is performed manually.• When the VOLUME+ button is pressed during adjustment, the sett-

ing increases, and the new setting is output.• When the VOLUME– button is pressed during adjustment, the sett-

ing decreases and the new setting is output.• If the VOLUME+/– button is held down, the setting changes continu-

ously with 100 ms cycle. *In this operation, the setting change is performed for each digit. The

digit is changed by pressing the MODE button.• If the setting is within the allowable range, the RANDOM display

lights.• When the STOP button is pressed during MANUAL1 menu or mea-

surement or adjustment, the state is changed to the TEST modestop state.

4. MANUAL2 Mode• Adjustment item to be made in AUTO2 mode is performed manually.• When the VOLUME+ button is pressed during adjustment, the sett-

ing increases, and the new setting is output.• When the VOLUME– button is pressed during adjustment, the sett-

ing decreases and the new setting is output.• If the VOLUME+/– button is held down, the setting changes continu-

ously with 100 ms cycle. *In this operation, the setting change is performed for each digit. The

digit is changed by pressing the MODE button.• If the setting is within the allowable range, the RANDOM display

lights.• When the STOP button is pressed during MANUAL2 menu or mea-

surement or adjustment, the state is changed to the TEST modestop state.

• When the PLAY button is pressed in B-ATT set state, the mode ischanged to the continuous playback mode.

• As for operation during continuous playback refer to "TEST-PLAYmode explanation".

5. TEST-PLAY Mode• When the STOP button is pressed while the TEST-PLAY menu

appears, or in TEST-PLAY or continuous playback mode, the modechanges to the TEST mode stop state.

• When the PLAY button is pressed while the TEST-PLAY menuappears, continuous playback is initiated from the current pickupposition.

• Whenever the DISP button is pressed in the TEST-PLAY menu, thetarget address changes as follows.

0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —When the PLAY button is pressed while a target address is dis-played, continuous playback is performed after searching thataddress.

• Each time the MODE button is pressed while the TEST-PLAY modetarget address is displayed, the digit which is changed by pressingthe FAST FORWARD/REVERSE button is changed as follows.

0032 — 0032 — 0032 — 0032 —• When the FAST FORWARD button is pressed in the TEST-PLAY

mode target address is displayed, the digit of address specified bythe MODE button is set to +1h. (0 to F)

• When the FAST REVERSE button is pressed in the TEST-PLAYmode target address is displayed, the digit of address specified bythe MODE button is set to -1h. (0 to F)

* When the FAST FORWARD/REVERSE button is held down, thesetting changes continuously, one cycle being 100 ms.

• When the BASS button is pressed in the continuous playback mode,the number of jump lines changes as follows.

1 — 10 — 100 step — 1 * After the number of jump lines is indicated for one second, the

address indication is restored. [ T R ] or [ 100 stp ]• When the FAST FORWARD button is pressed in the continuous

playback mode, the specified number of lines is jumped in the FWDdirection.

• When the FAST REVERSE button is pressed in the continuousplayback mode, the specified number of lines is jumped in the REVdirection.

* When the FAST FORWARD/REVERSE button is held down, jumpis repeated every approx. 100 ms.

• Whenever the DISP button is pressed in the continuous playbackmode, the indication changes as follows.

* Pre-mastered disc

Continuous playback [ S Q ](SUBQ address indication)

|Continuous playback [ C E ](C1 error indication)

|Continuous playback [ S Q ](SUBQ address indication)

* Recordabl diskContinuous playback [ A P ](ADIP address indication)

|Continuous playback [ C E ](C1 error indication)

|Continuous playback [ A E ](ADIP error indication)

|Continuous playback [ A P ](ADIP address indication)

MD-MT877/MD-MT877C

– 14 –

6. TEST-REC Mode• When the STOP button is pressed while the TEST-REC menu

appears, or in the TEST-REC mode or continuous record mode, themode changes to the TEST mode stop state.

• Whenever the DISP button is pressed in the TEST-REC menu, thetarget address changes as follows.

0032 — 03C0 — 0700 — 08A0 —0950 — 0032 —When the PLAY button is pressed while a target address is dis-played, continuous playback is performed after searching thataddress.

• Whenever the MODE button is pressed in the TEST-REC modetarget address is displayed, the digit which is changed by the FASTFORWARD/REVERSE button changes as follows.

0032 — 0032 — 0032 — 0032 —• When the FAST FORWARD button is pressed in the TEST-REC

mode target address is displayed, the digit of address specified bythe MODE button is set to +1h.(0 to F)

• When the FAST REVERSE button is pressed in the TEST-RECmode target address is displayed, the digit of address specified bythe MODE button is set to -1h. (0 to F)

* When the FAST FORWARD/REVERSE button is held down, thesetting changes continuously, one cycle being 100 ms.

• When the VOLUME+/– button is pressed in the TEST-REC mode orcontinuous record mode, the laser record power changes.(Servo gain changes also according to record power.)

* After the laser record power is indicated for one second, the ad-dress indication is restored. [ R P W _ ]

• : Address• : Laser power cord• Operation is disabled if the premastered disc or disc is in miserase-

protected state.

Explanation of error history code13h : Adjustment servo retraction excessive retrial16h : C. IN detection time-over17h : A, B, E, F, and TCRSO offset measurement value out of

tolerable range21h : Focus retraction completion allowable time-over23h : Track search completion allowable time-over32h : P-TOC read failure42h : U-TOC read failure44h : U-TOC write data write disabled/read check error45h : U-TOC write test failure52h : SD write data write disabled72h : EEPROM data read check sum error73h : Record head drive disabled (by EJECT lever)91h : Ambient temperature is higher that the allowable temperature

Error messages Can't READ The details ' '

'f': Focus'a': Servo adjustment's': Track such'r': TOC information reading'u': UTOC information reading'w': At the time of data writing'p': Spindle start

Er-MD The details ' '

'41': UTOC light test error'80': EEPROM information reading error

7. NORMAL Mode• When the STOP button is pressed while the NORMAL menu

appears, the mode changes to the TEST mode stop state.• Indication during operation Indication of memory capacity on main unit LCD [ ] + Level meter

: Internal mode: Address (Cluster section): Address (Sector section)

• Selection of sound volume, BASS, etc. is possible (without indica-tion)

• Recording is also possible.• If the STOP button is pressed during operation in the NORMAL

mode, the NORMAL mode is cancelled, and the power is turned off.

8. Error data display Mode• Reversing when FAST REVERSE button is pressed• When the STOP button is pressed while the error data indication

menu appears or during error data indication, the mode changes tothe TEST mode stop state.

• Error data 0 is the latest error.• Error which occurred in the TEST mode is also stored in the memory.• When the DISP button is pressed while the error data indication

menu appears, the error data is initialized. [ C L E A R _ ]• : Error Code

MD-MT877/MD-MT877C

– 15 –

EEPROM (IC402) writing procedure1. Procedure to replace EEPROM and write initial

value of microcomputer in EEPROM(1) Replace EEPROM.(2) Refer to the latest EEPROM data list.(3) Start the test mode. (Refer to page 12 "Entering the

TEST mode".)(4) Version display (At the time of settlement of the test

mode by the button operation.)[ V e r . ]

EEPROM version (c ~ z) Microcomputer ROM version(5) The whole LCD lights.(6) Test mode stop state.

[ T E S T ]

Ambienttemperature

Temperaturecorrection

+ 8oC ~ +10oC - 05h + 9.1oC

+11oC ~ +13oC - 04h + 12.0oC

+14oC ~ +16oC - 03h + 14.9oC

+17oC ~ +19oC - 02h + 17.8oC

+20oC ~ +22oC - 01h + 20.7oC

+23oC ~ +25oC ± 00h + 23.6oC

+26oC ~ +28oC + 01h + 26.9oC

+29oC ~ +30oC + 02h + 29.4oC

+31oC ~ +33oC + 03h + 32.3oC

Centertemperature

Ambienttemperature

Temperaturecorrection

Centertemperature

- 9oC ~ +10oC 08h + 0.5oC

+ 3oC ~ +21oC 07h + 12.0oC

+15oC ~ +33oC 06h + 23.6oC

+26oC ~ +43oC 05h + 35.0oC

(7) Press the "BASS" button, and press 1 time the "FASTREVERSE" button.

[ E E P R O M ](8) Perform the operation to display "EEPROM SETTING

MODE CHART", compare the EEPROM DATA LISTwith the display, and set according to the EEPROMDATA LIST with the VOLUME+ or VOLUME– button.

(9) Set the temperature reference. (Refer to the Tempera-ture reference setting method.)

(10) Set according to the EEPROM DATA LIST. (11) Press the STOP button.

[ T E S T ] (12) Press the STOP button. (13) After data is written in EEPROM, turn off power .

2. Temperature reference setting method[1] Measurement, calculation and setting procedure

(1) Set the TEST mode.(2) Start the EEPROM mode 'Temp' menu. • Button operation in order of BASS, FAST REVERSE x

1 time, PLAY, PLAY in the test mode STOP state. • 'TM$$%%' is displayed. ($$= Temperature code, %%

= Temperature reference)(3) Once press FAST FORWARD, and determine the dis-

played microcomputer TEMP input AD value. • 'TPin##' is displayed. (## = TEMP input AD value)

(4) At the ambient temperature, determine the tempera-ture corrected value from the temperature measure-ment value correction table.

(5) Determine the temperature reference, using the follow-ing formula.

• Temperature reference = Microcomputer TEMP inputAD value + Temperature corrected value.

(6) Set the temperature reference value by button opera-tion, and check whether the temperature code indica-tion corresponds to "Temperature Code IdentificationTable".

[2] Temperature measurement value correction table [3] Temperature code identificationCheck that the temperature code indicated after the servocontrol corresponds to the temperature limits below

MD-MT877/MD-MT877C

– 16 –

EEPROM DATA LIST (EEPROM version C)

FG1 _ 44H

FG2 _ 70H

FF0 _ 10H

FF1 _ 70H

FF2 _ E8H

Ff0 _ 10H

Ff1 _ 48H

Ff2 _ EAH

FZH _ EDH

FLn _ 09H

FLp _ 06H

DJG _ 0FH

FSS _ 28H

FTS _ 18H

FSB _ 40H

FTB _ 38H

FGM _ 66H

TVG _ 84H

TO1 _ 50H

TO5 _ 58H

TOR _ 58H

Item display Set values

Fucus setting

TG1 _ 14H

TG2 _ 2AH

TF0 _ 10H

TF1 _ 70H

TF2 _ E0H

Tf0 _ 10H

Tf1 _ 40H

Tf2 _ E4H

TFS _ 00H

TBo _ 20H

TBt _ 12H

TKo _ 20H

TKt _ 0DH

TDo _ 67H

TDt _ 34H

SCo _ 00H

SCt _ 3AH

SCm _ 48H

CLp _ 24H

CLr _ 30H

JPI _ 0EH

K10 _ 65H

THP _ 02H

THG _ 02H

TOP _ 00H

TOG _ F4H

T1P _ 20H


Tracking setting

SPG _ 30H

SPi _ 9AH

SPm _ 62H

SPo _ 4FH

PGM _ E0H

SP1 _ 10H

SP2 _ 60H

SP3 _ F2H

SP4 _ F2H

SP5 _ 10H

Sp2 _ 60H

Sp5 _ 10H

SD1 _ 7FH

SD2 _ 7FH

SPK _ EBH

MPG _ 28H

SPL _ 60H

SPW _ 0FH

SPB _ 66H

SRi _ C0H

SRm _ 9AH

SRo _ 7BH


Spindle setting

SKS _ 7FH

SKL _ 7FH

SLC _ 24H

STL _ 07H

STM _ 42H

STE _ A6H

SDV _ 60H

SJP _ 03H

WTm_ 18H

SRV _ 54H

SLT _ 5CH

MVS _ 0AH

SLS _ 28H

SKE _ 0EH

SDE _ 1CH


Sled setting

MD-MT877/MD-MT877C

– 17 –

B1A _ 3FH

B1B _ 00H

B1C _ 00H

B2A _ 1FH

B2B _ 00H

B2C _ 00H

B3A _ E2H

B3B _ 00H

B3C _ 00H


BASS setting

COK _ 28H

FAT _ C0H

TAT _ 3EH

CAT _ 40H

FAB _ H


ADJ.SET setting

Digital EQ setting

HQ1 _ 90H

HQ2 _ 90H

HSG _ 11H

HSO _ FDH

LQ1 _ 90H

LQ2 _ 90H

LSG _ 11H

LSO _ 00H

GQ1 _ 98H

GQ2 _ 84H

GSG _ 11H

EQP _ 00H


CT0 _ 02H

CT1 _ 01H

CT2 _ 30H

CT3 _ 20H

CT4 _ D0H

CT5 _ 4BH

CT6 _ 18H

RC0 _ C0H

RC1 _ FEH

SYC _ A6H

PWL _ 54H

DR1 _ 24H

DR2 _ 22H

IN1 _ 17H

IN2 _ 11H

INH _ 00H

DRH _ 64H

PLE _ A6H

RCE _ 94H

ELT _ A0H

X2T _ C0H

SDF _ 1FH

CHV _ 50H

DRS _ 5AH

DUP _ 00H

RFL _ D0H

CG1 _ 66H

FB0 _ FCH

RST _ 00H

R20 _ 80H

R21 _ 20H

R40 _ BFH

R41 _ 02H

FBL _ 16H

MC2 _ 00H

MC4 _ 00H

L2H _ 81H

L4H _ 80H

SPM _ 00H

MSL _ 80H

US0 _ 00H

US1 _ 00H

US2 _ 00H


Control setting

MD-MT877/MD-MT877C

– 18 –

Performance mode =NormalPlayback volume =28LINE REC volume =30Microphone REC volume =20Resume setting =Cancellation

: To the test mode stop ([Test mode menu])

Volume+

Volume -

: Version indication 2 secondsEEPROM version

Test Mode Start · Completion methool

All the lighting

T E S T

• Starting method of the test modeWhen the unit is in the stand-by state (with no display), the test mode is started by performingthe following operation using the remote control. Press the [PLAY] button while pressing the [PLAY-MODE] button, and release the [PLAY-MODE] button while keeping the [PLAY] button pressed, and press the [VOLUME–] button.

: LCD all the lighting two seconds

Destination

Program version

• How to cancel the test mode

T E S T

B Y E

B Y E O K

POWER OFF

: Test mode stop

: [OK] or [NG]Check the microcomputer RAM and EEPROM with the contents of the preliminary adjustment.

Pickup position initialisationEEPROM contents renewal

STOP

Indication after the start :

(During the spare style automatic adjustment)

(During the focus balance adjustment)

(During the adjustment that ATT is automatic)

Normality completion

(Adjustment completion)

(Continuance is regenerating)It confirms that an address proceeds

PLAY

PLAY

A U T O 1

Do the following when replacing the mechanism, the pickup, the EEPROM (IC402), the LSI(IC201) or the main PWB unit.

A D J . O K

A T 2

A T 1

If you replaced EEPROM, set the EEPROM valume to the final version.

The indication of RAMDOM

A P # # # #

Indication disappears

All the supply of the power supply is turned off

B Y E O K

PLAY

STOP is pushed

Remote controller P-MODE button

A D J . O K

Enter the test mode, move the pickup to the most internal periphery and execute AUTO1.(Use the disc of MMD-213A.)

The indication of "TEST"

A D J . O K

AUTO2 It is made to carry it out

Move the pickup to the most internal periphery and press the BASS button (Fast Forward Button)

PLAY

STOP is pushed

Normality completion

(In such cases as the battery)

MD-MT877/MD-MT877C

– 19 –

: Test mode stop

: Pre-automatic adjustment menu

: ATT auto adjustment menu

: EEPROM setting menu

BASST E S T

Slide externalperiphery move

Slide internal periphery move

Change of Tset Mode Menus

A U T O 1

A U T O 2SKIP UP SKIP DOWN

SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

T R E C

T P L A Y

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

: Error history display menu

E E P R O MSKIP UP SKIP DOWN

SKIP UP

SKIP DOWNSKIP UP

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* When the [VOLUME+] button is pressed in the "TEST MODE STOP" state, the program version is displayed for 2 seconds* When the [VOLUME–] button is pressed in the "TEST MODE STOP" state, all the displays appear for 2 seconds.

: Pre-manual adjustment menu

: ATT manual adjustment menu

: Continuous playback menu

M A N U 1

: Continuous record menu

M A N U 2

: Test mode normal play menu

E D A T A

N O R M A L

: Digital input signal monitor menu

SKIP UP SKIP DOWN

SKIP UP SKIP DOWN

: Pre-adjustment value check menu

D i n M o nSKIP UP SKIP DOWN

: ATT adjustment value check menu

R S L T 1

R S L T 2

: Preautomatic adjustment menu Adjustment error

: Preadjustment error (adjustment value output)

: During preautomatic adjustment

Adjustment error

Normal end

: Preadjustment normal end (adjustment value output)

: During ATT automatic adjustment

PLAY

PLAY

A U T O 1

Servo Preautomatic Adjustment

A D J . O K

A D J . N G

A T 2

A T 1

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* Move the pickup lens manually to the innermost periphery before performing the servo preliminary auto adjustment. (Refer to "Change of test mode menus" for the operation method.)* " " is the internal processing number, the meanings of the numbers are as follows.

0 0 : Initial setting0 2 : ABEF input offset measurement0 4 : AB input (ABMAXO) level setting0 5 : Focus ATT tentative setting0 6 : Pit section EF input level setting0 7 : COUT level setting for pit section adjustment0 8 : Sled external periphery move0 9 : Groove section EF input level setting1 0 : COUT level setting for groove section adjustment1 1 : TCRS input level setting1 2 : Tracking ATT initial setting1 3 : AB input (LPFABO) level setting1 4 : Focus ATT initial setting1 6 : TCRS input offset measurement

* It is necessary for each test mode where servo operation is made to complete the preliminary adjustment. (Otherwise, "ErADJ." appears.)* The preliminary adjustment complete state is stored on the EEPROM (protected field).

MD-MT877/MD-MT877C

– 20 –

: ATT auto adjustment menu

: ATT adjustment error (adjustment value output)

: During ATT auto adjustment

Adjustment error

Normal end

: ATT adjustment error (adjustment value output)

: Continuous playback (high reflection): Continuous playback (low reflection)

PLAY

PLAY

A U T O 2

Servo ATT Auto Adjustment

A D J . O K

A D J . N G

S Q # # # # A P # # # #

A T 2

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* Move the pickup lens manually to the innermost periphery before performing the servo ATT auto adjustment. (Refer to "Change of test mode menus" for the operation method.)* " " represent the adjustment number as follows.

0 0 : Initial setting0 3 : Pit section tracking ATT setting0 4 : Pit section focus ATT setting0 6 : Sled external periphery move (low reflection only)0 7 : TCRS ATT setting (low reflection only)0 8 : Groove section tracking ATT setting (low reflection only)0 9 : Groove section focus ATT setting (low reflection only)


SQ : Continuous playback (pit section)AP : Continuous playback (groove section)

# # # # : Address

: Continuous playback (pit section): Continuous playback (groove section)

# # # # : Address

Continuous Playback

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* In the start address set state the start address changes as follows when the [DISP] button is pressed. 0 0 3 2 H (initial value) 0 3 C 0 H 0 7 0 0 H 0 8 A 0 H

A d 0 0 3 2 A d 0 3 C 0DISP

DISP

A d 0 7 0 0DISP DISP

A d 0 8 A 0

* In the start address setting state the start address change digit changes when the [P-MODE] button is pressed. 1st digit (initial value) 2nd digit 3rd digit

A d 0 0 5 0 A d 0 0 5 0MODE

MODE

A d 0 0 5 0MODE

• Continuous playback from current pickup position


: Start address setting

DISP

T P L A Y

A d 0 0 3 2PLAY

S Q # # # # A P # # # #

• Continuous playback from any address

* In the start address set state the value of selection digit changes in the range of "0h to Fh" when the [FAST FORWARD/REVERSE] button is pressed* If the [P-MODE] button is pressed in the continuous playback state, the mode is changed to the B-ATT setting state of the ATT manual adjustment.

A d 0 9 5 0

PLAY

T P L A Y

S Q # # # # A P # # # #

AUTO1 Practice finish?


YES

YES

E r A D J

AUTO2 Practice

No error?

A D J. N G

NO

NO

YES

NO

0 9 5 0 H

P-MODE

H B L B

S Q # # # # A P # # # #

: Continuous playback (pit section): Continuous playback (groove section)

# # # # : Address

: High-reflection pit section B-ATT (focus) setting: Low-reflection groove section B-ATT (focus) setting

: ATT setting

MD-MT877/MD-MT877C

– 21 –


Continuous Record

* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set.* In the start address set state the start address changes as follows when the [DISP] button is pressed.

• Continuous record from the current pickup position


: Start address setting

: Continuous record # # # #: Address

: Continuous record # # # #: Address

DISP

T R E C

A d 0 0 3 2PLAY

A P # # # #

• Continuous record playback from any address

A d 0 0 3 2 0 0 3 2 H (initial value) 0 3 C 0 H 0 7 0 0 H 0 8 A 0 H

A d 0 3 C 0DISP

A d 0 7 0 0DISP DISP

DISP

A d 0 8 A 0

* In the start address setting state the start address change digit changes when the [P-MODE] button is pressed.

* In the start address set state the value of selection digit changes in the range of 0h to Fh when the [FAST FORWARD/REVERSE] button is pressed.* In the continuous record state and start address set state the record laser power changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed. (Initial value 0DH)

A d 0 0 5 01st digit (initial value) 2nd digit 3rd digit

A d 0 0 5 0MODE A d 0 0 5 0 MODE

MODE

A d 0 9 5 00 9 5 0 H

PLAY

T R E C

A P # # # #



YES

YES

E r A D J

AUTO2 Practice

No error?

A D J. N G

NO

NO

YES

NO

Enter the EEPROM setting mode, and press the FAST FORWARD button.Change the MSL setting value from 00 to 08 by using CTRL_ (control setting menu). (If the MSL remains in 00, no signal is recorded.)

* In the continuous playback state the number of jump lines changes as follows shown the [BASS] button is pressed.

1 (initial value) 10

1 T R 1 0 T RBASS

BASS

1 0 0 s t pBASS

* When the [FAST FORWARD] button is pressed in the continued playback mode, jump of specified number of lines occurs in the external periphery direction. If the key is held down jump occurs continuously (100 ms cycle).* When the [FAST REVERSE] button is pressed in the continuous playback mode, jump of specified number of lines occurs in the internal periphery direction. If the key is held down, jump occurs continuously (100 ms cycle). • Focus balance Adjustment mode

100step

DISP

T-PLAY Each indication

b # # #

PLAY

Others indication* The focus balance adjustment mode is available only for low reflection discs. * The RANDOM marker lights up in the focus balance adjustment mode.* The focus balance ( ) can be changed by the VOL UP/DOWN button operation.* If the PLAY button is pressed in the focus balance adjustment mode, the unit returns to the continuous playback mode.


: Focus balance Adjustment mode: Focus balance

# # # : Jitter error

MD-MT877/MD-MT877C

– 22 –

: Pre-Manual Adjustment menu

: Temperature code indication $ $ : Temperature code

: A signal offset (AINO) measurement: Measurement value

: B signal offset (BINO) measurement: Measurement value

: E signal offset (EINO) measurement: Measurement value

: F signal offset (FINO) measurement: Measurement value

: Laser ON (play power)

: AB signal level measurement (ABMAXO) : Measurement value

: A-ATT (focus) tentative setting: ATT setting

: B-ATT (focus) tentative setting: ATT setting

: Pit section adjustment COUT level setting: COUT level setting

: Groove section adjustment COUT level setting: COUT level setting

: E-ATT (tracking) initial setting: ATT setting

: F-ATT (tracking) initial setting: ATT setting

PLAY

M A N U 1

Servo Pre-Manual Adjustment

T M P $ $

A hSKIP UP SKIP DOWN

B hSKIP UP SKIP DOWN

E hSKIP UP SKIP DOWN

F hSKIP UP SKIP DOWN

L O N PSKIP UP SKIP DOWN

A B SKIP UP SKIP DOWN

S aSKIP UP SKIP DOWN

S bSKIP UP SKIP DOWN

e f SKIP UP SKIP DOWN

P C HSKIP UP SKIP DOWN

e f SKIP UP SKIP DOWN

G C HSKIP UP SKIP DOWN

T C SKIP UP SKIP DOWN

S ESKIP UP SKIP DOWN

S FSKIP UP SKIP DOWN

SKIP UP SKIP DOWN

: Pit section EF signal level measurement (LPFEFO) : Measurement value

: Groove section EF signal level measurement (LPFEFO) : Measurement value

: TCRS signal level measurement (TCRSMIO) : Measurement value

: A-ATT (focus) initial setting: ATT setting

: B-ATT (focus) initial setting: ATT setting

: TCRS signal offset (TCRSO) measurement: Measurement value

a b

S ASKIP UP SKIP DOWN

S BSKIP UP SKIP DOWN

T HSKIP UP SKIP DOWN

: AB input level measurement (LPFABO) : Measurement value

* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. • In the case of the setup value two digits.

1st digit (initial value) 2nd digit

• In the case of the setup value three digits.1st digit (initial value) 2nd digit 3nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed.* If the [DISP] button is pressed, the display changes as follows.

P-MODE

P-MODE P-MODE

* If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power changes as follows.

1 (initial value) 10 384BASS

BASS

BASS

* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set.

L O N P L O N R L O N M

Play back Record power Maximum power

P-MODE

P-MODE

MD-MT877/MD-MT877C

– 23 –

S F

f i

E F

DISP

DISP

S E

e i

E F

DISP

DISPDISP

DISP

• LPFFINO/EFMIO measurement value

• LPFEINO/EFMIO measurement value

G C H

e f DISP DISP

P C H

S B

a bDISP DISP

S A

• LPFEFO measurement value

• LPFABO measurement value

S b

A BDISP DISP

S a

• ABMAXO measurement value

: EFMIO measurement value indication "REPEAT", "1" Mark lighting

: LPFFINO measurement value indication "1" Mark lighting

: F-ATT (tracking) initial setting


: LPFEINO measurement value indication "1" Mark lighting

: E-ATT (tracking) initial setting

: LPFEFO measurement value indication "1" Mark lighting

: Pit section adjustment COUT level setting: Group section adjustment COUT level setting

: LPFABO measurement value indication "1" Mark lighting

: ABMAXO measurement value indication "1" Mark lighting

: A-ATT (focus) tentative setting: B-ATT (focus) tentative setting

: A-ATT (focus) tentative setting: B-ATT (focus) tentative setting

: ATT manual adjustment menu

: Temperature code indication$ $ : Temperature code

: Laser ON (play power)

: Pit section E-ATT (tracking) setting: ATT setting

: Pit section F-ATT (tracking) setting: ATT setting

: High reflection A-ATT (focus) setting: Low reflection A-ATT (focus) setting

: ATT setting

: TCRS ATT setting: ATT setting

:Groove section E-ATT (tracking) setting: ATT setting

:Groove section F-ATT (tracking) setting: ATT setting

: Low reflection A-ATT (focus) setting: ATT setting

: Low reflection B-ATT (focus) setting: ATT setting

PLAY

M A N U 2

Servo ATT Manual Adjustment

T M P $ $

L O N PSKIP UP SKIP DOWN

P ESKIP UP SKIP DOWN

P FSKIP UP SKIP DOWN

H A L a

SKIP UP SKIP DOWN

: High reflection B-ATT (focus) setting: Low reflection B-ATT (focus) setting

: ATT setting

H B L b

SKIP UP SKIP DOWN

G CSKIP UP SKIP DOWN

G ESKIP UP SKIP DOWN

G FSKIP UP SKIP DOWN

L ASKIP UP SKIP DOWN

L BSKIP UP SKIP DOWN

* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set.* If the [PLAY] button is pressed in the B-ATT setting state, the mode is changed to the continuous playback mode. And if the [P-MODE] button is pressed in the continuous playback state, the mode is changed to the B-ATT setting state of the ATT manual adjustment.

MD-MT877/MD-MT877C

– 24 –

g j

L b

S Q # # # #PLAY P-MODE

H B

: Continuous playback (pit section): Continuous playback (groove section) # # # # : Address

: High-reflection pit section B-ATT (focus) setting: Low-reflection pit section B-ATT (focus) setting: Low-reflection groove section B-ATT (focus) setting

: ATT setting L B

A P # # # #

P F

f i

E F

DISP

DISP

P E

e i

E F

DISP

DISPDISP

DISP

• LPFFINO/EFMIO measurement value

• LPFEINO/EFMIO measurement value

T CDISP DISP

G C

H B

a bDISP DISP

H A

• TCRSMIO measurement value

• LPFABO measurement value

* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed.

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/-] button is pressed.* If the [DISP] button is pressed, the display changes as follows.

P-MODE P-MODE

* If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power changes as follows.

Playback power Record power Maximum powerBASS

BASS

BASSL O N P L O N R L O N M


: LPFFINO measurement value indication "1" Mark lighting

: Pit section F-ATT (tracking) setting: Groove section F-ATT (tracking) setting


: LPFEINO measurement value indication "1" Mark lighting

: Pit section E-ATT (tracking) setting: Groove section E-ATT (tracking) setting

: TCRSMIO measurement value indication "1" Mark lighting

: TCRS ATT setting

: LPFABO measurement value indication "1" Mark lighting

: High-reflection pit section A-ATT (focus) setting: High-reflection pit section B-ATT (focus) setting: Low-reflection pit section A-ATT (focus) setting: Low-reflection pit section B-ATT (focus) setting: Low-reflection groove section A-ATT (focus) setting: Low-reflection groove section B-ATT (focus) setting

L b L a

L B L A

G E

G F

1st digit (initial value) 2nd digit 3rd digit

MODE

MD-MT877/MD-MT877C

– 25 –

: Pre-adjustment Value Check menu

: A signal offset measurement value (setting)

: B signal offset measurement value (setting)

: E signal offset measurement value (setting)

: F signal offset measurement value (setting)

: TCRS signal offset measurement value

: EF signal measurement value

: TCRS signal measurement value

: AB signal input measurement value

: Pit section adjustment COUT level setting

: Groove section adjustment COUT level setting

: A-ATT (focus) initial setting

PLAY

R S L T 1

Servo Pre-adjustment Value Check

A H

B HSKIP UP SKIP DOWN

E HSKIP UP SKIP DOWN

F HSKIP UP SKIP DOWN

T HSKIP UP SKIP DOWN

e fSKIP UP SKIP DOWN

T CSKIP UP SKIP DOWN

a bSKIP UP SKIP DOWN

P C HSKIP UP SKIP DOWN

G C HSKIP UP SKIP DOWN

S ASKIP UP SKIP DOWN

SKIP UP SKIP DOWN

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. • In the case of the setup value two digits.


• In the case of the setup value three digits.1st digit (initial value) 2nd digit 3nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed.

P-MODE

: B-ATT (focus) initial setting

: E-ATT (tracking) initial setting

: F-ATT (tracking) initial setting

S B

S ESKIP UP SKIP DOWN

S FSKIP UP SKIP DOWN

P-MODE P-MODE

P-MODE

P-MODE

MD-MT877/MD-MT877C

– 26 –

: ATT Setting Check menu

: Pit section E-ATT (tracking) setting

: Pit section F-ATT (tracking) setting

: Groove section E-ATT (tracking) setting

: Groove section F-ATT (tracking) setting

: High-reflection A-ATT (focus) setting

: High-reflection B-ATT (focus) setting

: Low-reflection A-ATT (focus) setting

: Low-reflection B-ATT (focus) setting

: TCRS-ATT setting

PLAY

R S L T 2

ATT Setting Check

P E

P FSKIP UP SKIP DOWN

G ESKIP UP SKIP DOWN

G FSKIP UP SKIP DOWN

H ASKIP UP SKIP DOWN

H BSKIP UP SKIP DOWN

L ASKIP UP SKIP DOWN

L BSKIP UP SKIP DOWN

G CSKIP UP SKIP DOWN

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. • In the case of the setup value three digits.

1st digit (initial value) 2nd digit 3nd digit

* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed.

P-MODE P-MODE

: Error history indication menu

: Error history 0 indication$ $ : Error code










PLAY

E D A T A

Error History Display

E 0 $ $

E 1 $ $

: Error history indication menu

: Error history clear

DISP

E D A T A

C L E A R

SKIP UP SKIP DOWN

E 2 $ $SKIP UP SKIP DOWN








• Error history clear

• Error history indication

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.

: Total recording timeR C SKIP UP SKIP DOWN

After one second

MD-MT877/MD-MT877C

– 27 –

: EEPROM setting menu

: Focus setting menu

: Spin setting menu

: Tracking setting menu

: Sled setting menu

: BASS setting menu

: TEMP setting menu

: Adjustment setting menu

: Digital EQ setting menu

: Control setting menu

PLAY

E E P R O M

EEPROM Setting

F o c u s

S p i n

SKIP UP SKIP DOWN

T r a c kSKIP UP SKIP DOWN

S l e d

SKIP UP SKIP DOWN

B a s s

SKIP UP SKIP DOWN

T e m p

SKIP UP SKIP DOWN

A D J S E TSKIP UP SKIP DOWN

D E Q S E TSKIP UP SKIP DOWN

C T R LSKIP UP SKIP DOWN

SKIP DOWN


• Menu transition

L S I I FSKIP UP SKIP DOWN

SKIP UP

: Temp setting menu

: TEMP standard value setup: Setup value

$ $ : Temperature code: TEMP A/D input value indication

PLAY

T e m p

• TEMP Setting

T M $ $

T P i nSKIP UP SKIP DOWN

* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* When the [DISP] button operation is performed in the specific state, the menu changes to "TEMP SETTING menu".* When the [P-MODE] button is pressed in each state, the set digit is changed.


* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.* When the [DISP] button operation is performed in the specific state, the menu changes to "TEMP SETTING menu".* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed.

1st digit (initial value) 2nd digitP-MODE

P-MODE* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed.

P-MODE

P-MODE* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/–] button is pressed.

: Each setup menu except for TEMP

: Each setup item except for TEMP: Setup value

PLAY

Each setup menu

• Setup except for TEMP

Setup item

: LSI setting TEST mode menu

: Test mode normal playback menu

: Normal playback mode @@@@@@: Mode and address indication

PLAY

N O R M A L

Test Mode Normal Playback

@@@@@@


– 28 –

MD-MT877/MD-MT877C

SW401 EJECT OFF—ON

SW901 DISC PROTECT OFF—ON

SWA01 RECORD OFF—ON

SWA02 PLAY OFF—ON

SWA03 BASS OFF—ON

SWA04 EDIT OFF—ON

SWA05 DISPLAY OFF—ON

SWA06 VOLUME – OFF—ON

SWA07 VOLUME + OFF—ON

SWA08 STOP OFF—ON

SWA09 MODE OFF—ON

SWA10 FAST REVERSE OFF—ON

SWA11 FAST FORWARD OFF—ON

SWA12 ENTER OFF—ON

SWA13 OPEN/CLOSE OFF—ON

NOTES ON SCHEMATIC DIAGRAM

• Resistor:To differentiate the units of resistors, such symbol as K andM are used: the symbol K means 1000 ohm and the symbolM means 1000 kohm and the resistor without any symbol isohm-type resistor. Besides, the one with “Fusible” is a fusetype.

• Capacitor:To indicate the unit of capacitor, a symbol P is used: thissymbol P means pico-farad and the unit of the capacitorwithout such a symbol is microfarad. As to electrolyticcapacitor, the expression “capacitance/withstand voltage” isused.(CH), (TH), (RH), (UJ): Temperature compensation(ML): Mylar type

• The indicated voltage in each section is the one measuredby Digital Multimeter between such a section and the chas-sis with no signal given.

• Parts marked with “ ” ( ) are important formaintaining the safety of the set. Be sure to replace theseparts with specified ones for maintaining the safety andperformance of the set.

POSITIONREF. NO DESCRIPTION

2SA174572SA1832 GR2SC4738 GR2SD1979 SDTC144 EERN1104RN1444 A

TOPVIEW

F10J2E

TOP VIEWB

(G)(3)E

(S)1

C(D)(2)

SBE803

TOP VIEW

1SS361

TOP VIEW

HN1C01 FU

1

2

3 6

7

8

4 5

FTD2017

TOP VIEW

1

2

3 4

5

6

FDN339 N

HRB0103B1SS372

TOP VIEW

1

2

3 4

5

6

1

2

3

FDG312 P

RN4904RN4911

TOP VIEW

1

2

3 4

5

6

TYPES OF TRANSISTOR AND DIODE

– 29 –

MD-MT877/MD-MT877C

Figure 29 BLOCK DIAGRAM

IC65

1M

OT

OR

DR

IVE

LB19

38T

VC

C

VE

E

IC84

1 X

C63

72C

281P

R2.

8V U

P C

ON

VE

RT

ER

M90

3LI

FT

MO

TO

R

IC84

262

GR

2522

2.5V

RE

GU

LAT

OR

IC82

2 IR

3M14

N D

C/D

C

CO

NV

ER

TE

RIC

821

CP

H34

13N

-CH

MO

S F

ET

IC50

1A

D/D

A

CO

NV

ER

TE

RA

K45

51V

T

M90

2S

LED

MO

TO

R

IC10

1R

F S

IGN

AL

PR

OC

ES

SO

RIR

3R58

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2.3V

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GU

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IC77

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MM

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OC

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RIX

0419

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RIP

PLE

FIL

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R

OP

IC

LAS

ER

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M90

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PIN

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MO

TO

R

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ND

EC

/SE

RV

O/A

TR

AC

LR37

8161

+2.

7V

+2.

5V

T

F

+2.

5V

+2.

7V

+2.

7V

AV

CC

+2.

5V

+2.

7V

J703EARPHONES

TERMINAL

J703REMOTE CONTROL

TERMINAL

+2.

35V

SW

A01

-13

IC70

3A

UD

IO A

MP

.IR

3R59

N

IC70

1A

UD

IO A

MP

.IR

3R54

N

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1M

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OR

DR

IVE

BD

6640

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VM

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2E

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RO

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VS

IC20

2IX

2824

AF

16

M B

IT D

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M

OP

TIC

AL

J701OPTICAL IN

J701LINE IN

J702MIC IN

(READY FORPLUG/IN POWER)

7,10

,12

55,6

0

39,4

1,43

27,3

1,40

,4529

,40

37

26-3

0,32

-37,

39-4

6

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3

6,7

66

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2 3 15

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6,19

12 10

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17

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1-3,

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7,52

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2,5,6,7

96-9

9

40,4

7,48

,81,

91,9

2

31-3

3

49,7

2

2,5

17-2

2,24

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57,5

8

52

8

3

1,12

+2.

7V

82-8

4,86

,89

-100

4,7

5,6

SW

401

EJE

CT

SW

901

DIS

C

PR

OT

EC

T

68

12,5

3,54

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738

PLA

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AC

K S

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RE

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SIG

NA

L+

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M MM

+2.

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1-11

,36,

38,

73,7

4,93

R-C

H

L-C

H2

R-C

H3

L-C

H

VC

C

L-C

H

5

8R

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HEA

D D

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EIC

351

74A

CT0

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IC35

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PH56

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2005

VCC

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S-8

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IC40

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EX

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IC27

1 F

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251-

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261

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200

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222

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IC85

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C

CO

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RIC

851

CP

H34

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S F

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VC

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CC

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IC87

362

GR

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4.5V

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5,6

(+1.

5V) (-1.

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IC87

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C7S

86F

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XC

LUS

IVE

OR

GA

TE

1

1

– 30 –

MD-MT877/MD-MT877C

• The numbers 1 to 15 are waveform numbers shown in page 37.

A

B

C

D

E

F

G

H

1 2 3 4 5 6Figure 30 SCHEMATIC DIAGRAM (1/2)

• NOTES ON SCHEMATIC DIAGRAM can be found on page 28.

+2.

5V

+1.5V

+2.7V

MAIN PWB-A

11 1

PLAYBACK SIGNALRECORD SIGNAL

OPTICAL PICKUP

MECHANISM FLEXIBLE

51 50 49

64 63 62 19

18 17

32 31 30

11110

43

15

14

2

9 12

13

L103

11 10 9 8 7 6 5 4 3 2 1

W V

U

–

V U W

COM

+

M901SPINDLEMOTOR M903

LIFT MOTOR

M902SLED

MOTOR

M

M

M

TP487

TP487ATP105A

LDVARLDON

OPICGA

1 2 3 4 5 6 7 8 9

TP

113

TP

107

TP

116

TP

117

TP

118

TP

111

TP

114

TP

110

TP

108

TP

103

TP

102

TP

106

TP

101

TP

105

TP

109

TP

115

TP

119

TP

120

TP

121

TP122

T–

F+T+

F–

RF

1

RF

3R

F4

RF

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ND

MP

/R

VC

C

CV

CC

CO

M

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CDG

NDD

GN

D

LDV

AR

LDO

N FE

10 11 12 13 14 15 16 17 18 19

OPIC

TP352

14131211109 8 7

6 5 4 3 2 1 VCC

GND

TP351

8 7 6 5

4 3 2 1

3 2 1 5

4 5 4 3

2 1

TP

656

TP

658

TP

657

TP

655

TP

654

TP

660

TP

659

TP

661

TP

651

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653

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652

HE

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C1P C1M C2P

H2ROUTH2VMH2FOUTH2PG

H1ROUTH1VM

H1FOUTH1PG1

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C1

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SLC

OM

BE

MF

WB

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SLW

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RIBSPCOMSPWIN

S2S1

ASGND

CSTCSL1CSL2

FG

BRK–BRK+

IN1R

IN2F

C2M

V

G S3

48 47 46 45 44 43 42 41 40

39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

SPVIN

SGND

PWIN1 SPUIN

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

8 7 6 5 4

3 2 1 G

G

I1VCC

I2O1O2

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W

BOUT

FS

W

TC

GO

AO

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BO

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EO

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DT

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P

RF

AD

D

TC

GI

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FIN

FO

UT

EO

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48 47 46 45 44 43 42

10

ASW

BSW

GN

D1

NIN

PIT

G

3+4

PIN1+21234

R and

SW DIFF

BIAS

RF1

RF2

RF3

RF4

REFI

REFO

AIN

BIN

AOUT

12

11

9 8 7 6 5

4 3 2 1

41 40 39 38 37

13 14 15 16 17 18 19 20 21 22 23 24

EFMAGC

ADAGI

2-1DCNF

VC

C1

BIA

S

AD

IP

ADIPO

EFMO

AG

C

MODE

SWOPICPW

VCC2

WBOGND2

BP

F

CK102

35

36

34

33

32

31

30

29

28

27

26

25

DISC

SGAIN

TEMP

ADIPNFADAGC

TP901

TP610

DIS

CP

R

SLCNT3SLCNT2SLCNT1

SPDRR

SPINLDCNT2LDCNT1

EFMO

HD

ON

TP100

TP211

TP209 TP210

FOK SENSE CIN

SYD1

DINT

SYD0

SYD3SYD2

SYD5SYD4

SYD7SYWRSYRD

SYD6

SYRS

XRT

TP201ATP201

X17

6KO

TR

DR

R

TR

DR

F

FO

DR

F

FO

DR

R

SP

DR

F

SP

DR

R

6543

21

VCC2R5V

VC

CD

RA

M

TP200

CK224 TP203 CK222

TP

205

CK225

TP212 EF

MO

LDC

NT

2LD

CN

T1

TP204

CK207 TP208

CK202

CK201

CK203

TP202

RAA11

RAA1RAA0

RAA4RAA5RAA6RAA7RAA8

RAOEX

RACASXRAD2RAD3

VDD2

DGND

RAA9RARASXRAWEX

RAD1RAD0

ACRCER

RAA10

DGNDVDD2

SYSD7 SYSD6 SYSD5 SYSD4 SYSD3 SYSD2 SYSD1 SYSD0 RSTX

DINTX MCCKCOUTSENSE FOK ADPON DAPON OPTCNT

VD

D1

VR

EF

AV

CC

2

DG

ND

EF

MI

BIN

E

IN

FIN

AIN

AG

ND

TC

G

SLD

RF

T

RD

RR

T

RD

RF

X17

6KO

TE

ST

2

FO

DR

F

FO

DR

R

WB

I

VB

AT

LED

ON

1

EM

PH

LDC

NT

2LD

CN

T1

PLL

BV

C

VP

O

DIL

OC

K

VD

D1

DG

ND

TE

ST

0T

ES

T1

VX

I

X1I

X1ODIN

DO

UT

DG

ND

LRC

KB

CLK

DF

CK

ADDATADADATA

987654321

21

22 23 24 25212019181716151413121110

54 53 52 51555657585960616263646566676869707172737475

29282726

303132333435363738394041424344454647484950

101112

151413

181716

212019

242322

9798

9998

99100

100969594939291908988878685848382818079787776

737475

HDON

7677

4849505152

2324252627

78TEMON TOTMONFEMON

SYRDX

SYWRX

SYRS

AVCCEFMMON

EFMOX700KOTCRS

PLCK

RAA3RAA2

SPDRR SPDRF SLDRR

VCC

A10

VCC A3A2A1A0

RAS WEI/O2I/O1

GNDI/O4I/O3

CAS OEA9

GND

A8A7A6A5A4

987

654321

SY

D7

SY

D4

SY

D3

SY

RS

SY

RD

SY

D6

SY

D5

SY

D2

SY

D1

SY

D0

SY

WR

RC

AU

LT

INP

GC

K

MC

PG

ININ

PG

IN

RF

PC

NT

TP

417

TP

416

BEEP

SGAIN

OPICGA

TP415

PBMUTE

AUSCLKAUDATA

DSPSCKDSPSTBDSPDAT

CHGCNT

CIN

DISCPR

SPIN

DISC

DINT

FP

31F

P32

TP412

LDVAR

TEMP

RK

EY

ST

DC

K

HK

EY

2H

KE

Y1

PLV

BA

TP

LVD

CI

FP66

TP406

_DC

IN

FP

59

TP400

FP

67

SLC

NT

3

SLC

NT

1

FO

K

SE

NS

E

LDO

N

RP

LAY

DC

EX

T

SLC

NT

2

TP

401

TP402

AU

RE

SE

T

P17

P11

ARQD

DINT

AVSS

PBOPON

RADAT RACLK

CHGCNT

DSPSCK

DSPDATDSPSTB

DISCPR

CIN SPIN

LDVAR

RKCNG TEMPHKEY2 HKEY1

OS

C1

FW

E

SLC

NT

3

RP

LAY

VS

S

EX

TA

L

VC

CuS

TB

Y_D

CIN

MD

2

MD

1M

D0

SLC

NT

1

EJS

W

AV

CC

SE

NS

E

_RE

SE

T

XT

AL

SLC

NT

2

Vre

f

RFPCNT

OP

ICG

AJP

NP

RC

PC

NT

RC

LAT

INP

GC

KIN

PG

IM

CP

GI

TE

ST

1T

ES

T0

VC

C

VS

S

SY

WR

SY

D7

SY

D6

SY

D5

SY

D4

SY

D3

SY

D2

SY

D1

SY

D0

9 8 7 6 5 4 3 2 1

1 2

13 12 11 101415161718192021222324

2324252627

49505152

7475767778

9899100

25

29282726

303132333435363738394041424344454647484950

54535251 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

LEDCNT3

LEDCNT2

LEDCNT1STOP

PCNT3

PCNT2

BATON

EPRT

ELONN.

C.

N.C.

N.C

.

EEPD

PBLAT

CKSTP

REC

DCON

_PLAYEMPH0

DCNT1

LDON

XRST

EEPK

EPCS

979899100

969594939291908988878685848382818079787776

BUZOUTSGAIN DISCP MCMON PCNT1

SYRSSYRD

PLVBATPLVDCISTDCK RKEY

SCK0PCLDI RMDAT

FOK DCEXT

TP40

STOP

ELON

DCONPCNT3

EMPH0 PCNT2

PBAULT

DCNT1

HRECXRT

BATON

(OG)

(GREEN)

(BLUE)

TP

411A

TP408

TP409

TP411 8765

TP413

VDD

OUT VSS 4

32

1

HE

AD

SG

2

G1

D2

D1

S1

S2

G1

D1

S2

G2

S1

D2

AB

20 21 22

1 22

N.C

.N

.C.

3

1

2

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

+B

+B+B

+B

+B

+B

+B

+B

+B

+B

+B

4.22V0V

0V

N.C.

N.C.

C1650.033

R903470

L60810µH

C6081

R907180K

R908100K

R905100K

C908 0.33

C910 0.047 C909 0.047

C905 0.0022

C907 0.0022C906 0.0022

R90410K

C9011

C9110.1

C9120.1

IC601

L60422µH

L6034.7µH L6

0122

µH

L60222µH

C6021

C6011

C6031

C6041

C1510.01

R151100K

R4031K

SW901DISC PROTECT

R40

410

0K

R407100K

XL4013.68MHz

C4310.47

R431330K

D4311SS361

IC431S-80820LNP

RESET

R46

1

100

K

C4540.0022

R464220K

R46

3

100

K

R46222K

SW401EJECT

R42

322

K

R42

522

K

IC401IX0419AWSYSTEM

MICROCOMPUTER

IC4058X24EEPR

R41

61K

TP40

C4010.1

D4321SS372

R40

2

100K

R40

510

K

R42

422

K

R422100K

C20247/6.3

L20210µH

CN601

L10010µH

C10

010

/6.3

C20

110

/6.3

R20527K

Q103FDG312 P

C6050.1

C60022/6.3

C9020.01

R90910K

IC651LB1938T

MOTOR DRIVE

C65

20.

1

D651F10J2E

R3513.9

R36115

C3610.039

IC35

4

C35147P(CH)

TP

207

CN101

IC201LR378161

ENDEC/SERVO/ATRAC

CK204 CK205 CK206

C2030.1

IC202IX2824A16MBIT D-RAM

IC35

3

IC351

C3570.1

C354 0.1

C1131

C35310/6.3

C1120.1

C1111

R11112K

C1145P(CH)

C1091

R11

222

0K

R133

150K

TP139

R1

03

22

K

CK108

R1

04

22

K

R10122K

R10222K

C12

333

0P

C121220P

C12

222

0P

CK111

C124330P

CK113

CK112

CK114

C20

90.

1

R2041K

R1611.2K

C17133/6.3

L17110µH

C17233/6.3

R206100KC

205

0.1

TP206

C2070.1

C10

81

C1310.1

IC101

C11

00.

22

C1320.22

C10

61

C1330.22

C10

70.

1

R13939K

R140390K

TP

130

TP

131

TP

132

TP

133

R138390K

R13

756

K

R13

556

K

R136390K

R1321M

R131

150K

R1341M

TP144 TP144

C102 1 C1031

C2040.47

R2221M C211 5P(CH)

XL20133.8688MHz

C2128P(CH)

Q901RN1104

R920100K

D351SBE803

C1300.1

R40622K

R408100K

R41215K

R411100K

R4141K

R41

51K

IC601BD6640KV

MOTOR DRIVE

IC353FTD2005

HEAD DRIVER

IC35

4 C

PH

5608

HE

AD

DR

IVE

R

IC35

174

AC

T02

FT

HE

AD

DR

IVE

R

R906270K

IC101 IR3R58MRF SIGNAL PROCESSOR

R207680

L204

– 31 –

MD-MT877/MD-MT877C

7 8 9 10 11 12Figure 31 SCHEMATIC DIAGRAM (2/2)

+2.7V

–2.7

V

+4.

5V

+1.

5V

+2.7V

+2.7V

+2.7V

–2.7V

+4.5V

LCD

/KE

Y P

WB

-B

EXTENSIONTERMINAL,+

GNDTERMINAL,–

BATTERYTERMINAL,+EXTENSIONTERMINAL,+

BATTERYTERMINAL,–

CONTROLTERMINAL

5 67 8

EOGND

VCC

ROSC OS

C

EIN

EIPBY

OUTBU

FSQ R

RS

FF

CM

P

CTRL

VREF

ERRAMP

STAND

VCC2R5V

101112

151413

181716

212019

242322

VCC

A10

VCC A3A2A1A0

RAS WEI/O2I/O1

GNDI/O4I/O3

CAS OEA9

GND

A8A7A6A5A4

987

654321

TP

401

TP405

STOP

ELON

DCONPCNT3

EMPH0 PCNT2

PBAULT

DCNT1

HRECXRT

BATON

(OG)

(GREEN)

(BLUE)

TP

411A

8

409

TP411

TP

407

TP

410 8

765 4

321

TP413

OPEN

HPLAY STOP

HREC

VCCMICOM

5

4 321

DADATAADDATA

BCLKLRCK

DFCK

ADPON DAPON OPTCNTDIN EMPH1

16 15 14 13 12 11 10 9

8 7 6 5 4 3 2 1

AIN

RA

INL

LRC

K

SC

LK

SD

TI

SD

TO

MC

LKD

EM

0D

EM

1

VD

DV

SS

PW

DA

PW

AD

AO

UT

L A

OU

TR

V

CO

M

5

4 3 2 1 VCC

GND

8

7

6

5 4

3

2

1

8

7

6

5 4

3

2

1

EOGND

VCC

ROSC OS

C

EIN

EIPBY

OUTBU

FSQ R

RS

FF

CM

P

CTRL

VREF

ERRAMP

STAND

5

4 3 2 1

DCON

PCNT2

PB

AU

LT

AU

RE

SE

T

BE

EP

PB

MU

TE

AU

DA

TA

AU

SC

LKR

CA

ULT

24 23 22 21 20 19 18 17 16 15 14 13

12 11 10 9 8 7 6 5 4 3 2 1

ATT

LI

N

LLP

FO

L– L+R

+

R–

RLP

FO

RIN

LHPVEE

LHPV

CC

DAT

CLK

LAT

RHPVEE

RHPV

CCHP

BE

EP

LPF

LPF

ATT

AMP&GAIN SEL.

AMP&GAIN SEL.

LOGIC

BIAS

INPGCKINPGINMCPGIN

STOP

OPEN

DSPSTBDSPSCKDSPDATHRECHPLAY HKEY2 HKEY1

14 13 12 11 10 9 8 7 6 5 4 3 2 1

CN

LAN

D1

LCD ASS'Y

7 6 5 4 3 2 1

2423 22 21 20 19 18 17 16 15 14 13

12 11 10 9 8 7 6 5 4 3 2 1

VE

E

VCC

DG

ND

RO

UT

LOU

T

RIH

P

LIH

P

AGND RI LI

L-CH

R-CH

6 5 4 3

2 1

6 5 4 3

2 1

6 5 4 3

2 1

PLVBAT

STDCK

BATON

CHGCNT

5

4 3 2 1

+ -

4

3 2

1

8 7 6 5 4

3 2 1

OUT

VDD

VSS

D S1S1

S2S2G2 G1

D

6 5 4 3

2 1

3 2

1

6 5 4 3

2 1 4

3 2

1 6 5 4 3

2 1

VSS

VDD

OUT

6 5 4

3 2 1

DC

EX

T

PLV

DC

I

_DC

IN

PC

NT

3

RK

EY

RP

LAY

ELO

N

KE

Y

PLA

Y

R-CH

L-CH

9 8

7

6

5 4 3 2 1

VoutGND

VCC

GND R

L R-CHL-CH

4

3 2

1

8 7

6 5

4 3

2

1

DC-IN

TP804

TP803 NI-MH

EM

PH

0

2 3

1

3 2

1

D

GS

G

D

S

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

+B

+B

+B

+B

+B

+B

+B

14

1

(–)

0V

0V

0V 1.87V0V

4.43V

3.91V4.47V

2.73V

(–)

2.21V

(–)0V

0V

0V

0V0V0V

0.85V

0.86V

1.3V

5.39V 0V

4.65V

1.3V

0.78V1.3V

5.38V4.81V

5.39V

N.C.

N.C.

N.C.

LEDA02 TLGU1008

CNA01

LEDA03 CL190HBX

LEDA04TLOU1008

RA16330

QA012SC4738GR

RA15

10K

SWA10 FAST REVERSE

SWA12 ENTER

SWA07 VOLUME+SWA08 STOP

SWA06 VOLUME–

RA015.6K

SWA03 BASS

RA028.2K

SWA02 PLAY

RA0318K

SWA01 RECORD

RA0456K

RA068.2K

RA0718K

RA0856K

SWA04 EDIT

SWA09 MODE

RA055.6K

SWA05 DISPLAY

SWA11 FAST FORWARD

CA

010.

1 CA020.1

RA1318K

RA14

18K RA12

33K

SWA13OPEN/CLOSE

C2701

R44510K

Q4432SC4738 GR

R441120

C85

222

/6.3

Q442RN4911

6 5 4 3

2 1

R442820

R81

210

0K

R8132.2K

R815100K

R816100K

Q807HN1C01 FU

R88118K

C8810.027

R88210K

C8601

C2920.01

C7741

C4540.0022

R464220K

R46

3

100

K

R20

010

0K

C2100.1

C2001

IC200

5

4 3 2 1

C510 1

C509 1

TP463

C8371

IC87

362

GR

4522

4.5V

RE

GU

LAT

OR

C8360.47

C85

91

IC4045

4 3 2 1

TP

500

C5033.3/10

C5050.001

C5060.001

C501

0.00

22 C5020.0022

IC50

1

C50010/6.3

C5110.1

R501 470

R502 470

IC40258X2404TEEPROM

R41

61K

TP404

C4010.1

D4321SS372

R831180K

C840220/4

TP464

R73147K

R73347K

R73247K

TP462

CN451

C20247/6.3

L20210µH

TP460

TP453 TP452

TP459 TP458 TP457

TP455 TP454

TP456

TP451

TP461

D801RB521S30

R4951K

R49622

C4930.47

Q4932SA1832 GR

F8410.4A

DC60V

TP841

R8282.2K

R802100K

Q802FDN339N

R256100K R

257

1M

R71047

R822100K

Q821HN1C01FU

R8212.2K

C2530.01

R2592.2K

R807100K

Q806HN1C01FU

R80947K

R81022K

Q8052SA1832 GR R

808

560K

R82

910

0K

R28247K

R2541M

Q825DTC144 EE

R817100K

Q2542SA1832 GR

R255560K

R258330K

IC27175S54FUOP AMP.

R27822

C2720.1

R2772.2K

R27456K

R27515K

C2730.1

C274 0.1

R276

120K

R272470K

R27

347

K

Q801RN4904

TP801

TP805

TP806

IC801

R8051M

R804330K

Q8032SA17457

R8031K R801

47K

Q804HN1C01 FU

R2811K

R2912.2K

C2911 R292

100K

R2611M

R263100K

R264100

R262330K

Q261HN1C01 FU

R81427K

R806100K

R271470K

R25333K

C2520.1

R25122

Q2512SA17457

C2510.1

R252560KQ253

RN4904

IC251S-80808LNP

RESET

Q252FTD2017

C8170.1

R81847K

IC77162GR23222.3V REGULATOR

5

4 3 2 1

C7730.22

R85022KC850

0.1

C8411

L8414.7IC841

5

4 3 2 1

D841F10J2E

C84

30.

22

C84

233

/6.3

TP842

D842HRB0103B

C8471

C8460.1R844

47

C8450.1C851

3.3

L85110µH

C7751

R87110K

C8631

C86

21 D861

F10J2E

D862F10J2E

C7761

D772F10J2E

D77

1F

10J2

E

IC871TC7S86FU

EXCLUSIVE OR GATE

IC851C8581 D851

F10J2E

D85

2F

10J2

E

C8761

C82222/6.3

C82

322

0/4

C8213.3

C8281

C8251

D82

2H

RB

0103

B

D821D1FH3

IC821L82110µH

C8380.1

R83347

D832HRB0103B

C83

30.

1 C8340.1

D831HRB0103B

C8320.1

C8481

R841100K

C84

410

/6.3 IC842

62GR25222.5V

REGULATOR

C83

01

R82410K

IC852C857

33P(CH)

R855180K

C856150P(CH)

R857560K

R853270K

IC822C82782P

(CH)

C82682P(CH)

R8263.9M

R825390K

R827270K

R823270K

R832180K

R8341.5M

C83

90.

33

R85410K

R7171K

R711 6.8KR719

6.8K

R712 6.8KR7206.8K

C7340.1

C7330.1

IC701IR3R54NAUDIOAMP.

R71410K

R71310K

C712100P(CH)

C7150.1

C711100P(CH)

TP707

TP703

TP705

TP708

TP701

TP704

TP706

TP702

J701OPTICAL/LINEC714

1

Q711RN1444 A

C7131

R7181K

R715100K

R716100K

C70

30.

01

R702100

R701100

C70110/6.3

R703100K

C70210/6.3

C721 3.3/10

C7230.001

C7240.001

TP712

TP711

TP713

J702MIC IN

TP714

C7253.3/10

R7236.8K

R7246.8K

R725100

C7263.3/10

R72639K

C722 3.3/10

R729 4.7K

R730 4.7K

R7278.2K

C7310.22

R7281K

Q721

C7650.22

C7660.22

R76615

R76515

D49

5M

A80

75M

D496MA8075M

C4921

C7631

C7641

L49133

D493015Z5.1Y

D491015Z5.1Y

C4910.1

R4921K

D49415AZ7.5Y

D49215AZ7.5Y

TP726TP725

TP724TP723

TP722

TP721

TP728

J703REMOTE CONTROL/EARPHONES TERMINAL

TP727

TP

772

TP

771

C77147/6.3

C86947/6.3

IC202IX2824AF16MBIT D-RAM

R758100

R761390K

IC703IR3R59N

AUDIO AMP.

C7541

R76

210

0K

R754180K

C7531

R7572.2KC7600.1

C7581

RD

AT

A

VC

CA

DD

A

RDATA

GND

VCC

R41215K

R411100K

4

R41

51K

R41

31K

IC501AK4551VTAD/DA CONVERTER

IC20062GR2522

2.5V REGULATOR

IC404N7SZ86P5GATE IC

IC801S-80814ALNP

RESET

IC821 CPH3413 N-CH MOS FETIC822 IR3M14N DC/DC CONVERTERIC841 XC6372C281PR 2.8V UP CONVERTERIC851 CPH3413 N-CH MOS FETIC852 IR3M14N DC/DC CONVERTER

IC871

Q7212SD1979 S

RIPPLEFILTER

L704

L702

L703

L714L713L712L711

L456

L452

L453L454

L457

L458

C4510.022

– 32 –

MD-MT877/MD-MT877C

• The numbers 1 to 15 are waveform numbers shown in page 37.

: Through-hole where the top, bottom and +B patterns are connected. : Through-hole where the top, bottom and hround patterns are connected. : Through-hole where the top and bottom patterns are connected.

A

B

C

D

E

F

G

H

1 2 3 4 5 6

Figure 32 WIRING SIDE OF P.W.BOARD (1/4)

SW401EJECT

R730

C703

R703

C604

R724

R723

Q721

R726

R725

C725

R716

R71

5C

714

C713

R713

R714

R72

7R

728 R292

C731

C72

6

Q711

IC601

C60

3

C292

C91

2

D651

C911

Q901

R41

2R

411

CN101

R161C165

CK11

3

CK112

CK

114

R422

IC202

XL201

C209

IC201

C201

CN601

TP411A

C204

R20

4C

203

C200

IC200

C210 R200

C652

IC651

C291

R291

C353

IC351

R92

0

C357

IC353

C35

4R351

D351C361

IC354

R361

C351

C251

IC251

R82

1R

256

IC822

R81

7

D80

1

IC801 Q801

Q802

Q825

R424

R251

FP59R431C830

R274R25

9C

253

R2

58 R255

C270R809

R27

5R254C272

C274R277

Q254Q821

C273

R81

0

R278

R82

8

R8

22

C839

R829

Q806

R8

06

Q804Q261

R81

6

R813Q807

R80

2

C88

1

Q805

R807

R80

8

IC431

C431

R8

31

R832

R83

4

IC852

IC271

IC84

2

IC401

D822

CK111

C130

C401

FP

66

R425

D432C860

D431

R871

C87

6

IC871

R423

C825

R85

7R

85

3

C85

7R

827

R8

23

R8

24

C82

7C

826

TP48

7AR

82

6

R8

25

R8

54

R833

C838

C83

6

D83

1

C83

4

C828D832

C85

6

R856

C832R855

R402

C833C8

37

IC873 C844

C848R841

R408

R40

6

R40

5R

407

R76

6

R76

5

C76

5C

766

IC703

R76

7

R768D491

C492

D49

6

D495

D49

2R

492

L491

D494

C491

IC701 C722

R729

R907

R908

C721

IC771

C774

C503

C511 CN451

C753

IC404

C605

C905

R46

1R

463

R46

2

R904

C906

C910C909

R90

9

Q442

Q443

R44

1

R44

2

C500

TP

105A

FP

67

R445

R903C907

R40

4

C454

R46

4R

732

R73

3

R731

C760

R757

R712C734 C733

R758

R75

4

R720R719

R71

1

C758C75

4

C902

R7

61

C7

12

C711

R762

C901

C723

C724

R906

R905

C601

C602 R413

IC402 R415

R414

R416

FP32

FP31

C21

2

C211

R222

R81

5R

814

TP

201A

C20

7

R20

6

C20

5

R205

R2

57

R272

R271

R263

R2

64

R2

62

R2

61

R8

05

R8

04

R8

03

R8

82

R881

R8

12

R8

01

C8

17

R8

18

R276

R273

Q803

C773

C90

8

J701OPTICAL/LINE IN

61 7 12

13181924

1

5

10

45

40 35 30

26

25

20

15

10095

908580

76

75

70

65

60

55

51 50

122

1

5

10

45 40 35 30

26

25

20

15

100958575

70

65

60

55

51 50

80 14

85

1

11

1 4

8 5

1

1

5

78

10

145 4

81 2

35

1

5101516

17

20

25

30

3132 35 40 45 48

4950

55

60

64

15

13

15 20

24

1012

15

13

15 20

24

10

12

1

14

5 4

31

13

4 5

34 5

1

1

3

5

4

1 144

58

85

34 5

1

34 1

2

13

54

1

3

4

2

J702MIC IN

J703REMOTE CONTROL/

EARPHONES

8 7

2

5

4

3

6

1

2

1

4

4

5

43

1

26

1 3

54

L452

L453

L454

L456

L457

L458

L713 L714

L204

L702

L703

L704

L711

L712

R207

C451

L103

1

FROMOPTICALPICKUPP35 9-G

FLEXIBLE PWB

MAIN PWB-A (TOP VIEW)

FLEXIBLE PWB

FROMMECHANISM

FLEXIBLE PWBP35 9-A

1

11

FLEXIBLE PWB

FROMLCD/KEY PWB

P34 3-A

1

14

13

12

22

– 33 –

MD-MT877/MD-MT877C

7 8 9 10 11 12


J703REMOTE CONTROL/

EARPHONES

TP728

TP901

R403

SW901DISC

PROTECT

TP406

TP725

TP726

TP721

TP723

TP771 TP772

TP500

TP202

C50

2

C506C764

C76

3

C501

TP722

TP724

C50

9

C510

TP727 R50

2

C505

R501

IC84

1

C842

IC501 D862

L171

L841

C841 C843

D861

D771

D772TP463

C775

C86

2

C863

R85

0C

850

TP842

D493R496

C171

TP458

TP461

R844

C845

TP464

D841

F8410.4A,

DC60VR495

C493Q493

TP402

XL401

TP400

TP212

TP804

TP801

TP803

TP841

TP410

TP413

C252

R25

2R

253

Q252

Q253

Q251

TP404 TP113 TP114 TP118

C172CK204

TP451 TP459

TP103

TP462

TP122

TP102

TP107 TP111 TP116

TP120

TP115 TP119

TP117

TP121

TP101

CK225

TP106

TP105

TP110

TP415

TP455 TP417

TP457

TP453

CK205

TP456

TP454

CK206

TP

416

CK207

TP208 TP401

C823

C776L604

D821

C847D842

C846

C608

L608

TP460

IC821

L821

TP405

L601 L602 L603

TP

211

C821

R71

7

C822

C600 C869 C771

TP711

J702MIC IN

TP412

TP713

TP714

R701

TP712

TP708

R702

TP704

C702

TP487

J701OPTICAL/LINE IN

C701

TP705

C85

1

C852

TP

806

C859

TP

703

TP

701

TP351

C840

L851

TP452

R710

C715

R71

8

D851

IC851

D852

C858 TP352 TP702

TP707

CK

201

TP706

TP201 TP655

TP205 TP654

TP652 TP653

TP651

CK203

TP209 TP210

TP407

TP409

TP408

TP660

TP658

TP659

TP657

TP661

TP656

TP610 TP411

CK202 R134R133

R131R132

R135

R136

C133TP130 R

139

R14

0

C12

1

C1

22

C12

3C

124

R137

R138

TP109

TP108

CK224

TP207 IC101

TP204

TP131

R10

1 R10

2TP132 TP

133

CK108

C131

TP203

CK222

CK102

R104R103

TP100

TP805 C202

L202

Q103

C100

C10

3

C10

2

C1

11 C132

C11

3

C109

L100

C106

C110C108

C112

C107

R112TP139

TP206

C151

TP200 R151

R282

R281

C11

4

TP144

R111

1

5

10

1213

15 20 24 25

30

3536

37

404548

S G

D

D

G

S

1

1510

9

8

5

16

4

5

3

1

7 8 9

21

3

EXTENSION BATTERY

TERMINAL,+

EXTENSION TERMINAL,+

GNDTERMINAL,-

CONTROLTERMINAL

BATTERY TERMINAL,-

BATTERY TERMINAL,+

11

9

75

8

6

3

4

152

14

10

1

MAIN PWB-A (BOTTOM VIEW)

– 34 –

MD-MT877/MD-MT877C


A

B

C

D

E

F

G

H

1 2 3 4 5 6

: Through-hole where the top and bottom patterns are connected.

LCD/KEY PWB-B(TOP VIEW)

LCD ASS'Y

P35 7-H

SWA13OPEN/CLOSE

CA02

RA06CA

01

RA08

RA07

RA05

LEDA03

LEDA02

LEDA04

QA01

RA16

RA15

SWA01RECORD SWA09

MODESWA07

VOLUME+ SWA10FAST REVERSE

SWA11FAST FORWARD

SWA06VOLUME–

SWA02PLAY

SWA05DISPLAY

SW

A12

EN

TE

R

SWA04EDIT

SWA03BASS

RA

04R

A03

RA

02

RA01

RA14RA12

RA13CNA01

SWA08STOP

1

7

14

1

CN451TO MAIN PWB

P32 2-F

FLEXIBLE PWB

LCD/KEY PWB-B(BOTTOM VIEW)

– 35 –

MD-MT877/MD-MT877C

7 8 9 10 11 12


TO MAIN PWBP32 2-D

M902SLED MOTOR

M903LIFT MOTOR

MECHANISM FLEXIBLE PWB(5)

M901SPINDLE MOTOR

MAGNETIC HEAD(3)

CN601

TO MAIN PWBP32 2-B

OPTICAL PICKUP(4)

TO LCD/KEY PWBP34 4-F

LCD ASS'Y(217)

CN101

CNA01

– 36 –

MD-MT877/MD-MT877C

VOLTAGE

PIN NO. VOLTAGE

1 2

456789

101112131415161718192021222324252627282930313233343536373839404142434445464748

PIN NO. VOLTAGE PIN

NO. VOLTAGE

100

PIN NO. VOLTAGE PIN

NO. VOLTAGE

IC401PIN NO. VOLTAGE PIN

NO. VOLTAGE

PIN NO. VOLTAGE

1

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

PIN NO. VOLTAGE

IC101

0.26 V0.26 V0.26 V0.26 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V0.26 V1.48 V0 V0 V2.49 V2.49 V1.78 V0 V1.25 V1.25 V0.26 V1.25 V1.25 V1.3 V1.28 V0.7 V2.49 V1.51 V0 V1.25 V0.28 V0.28 V1.25 V0.28 V0.28 V

IC201

1.24 V0 V0 V0 V2.5 V0 V0 V0 V0 V0 V–1.55 V0 V0.67 V0.67 V2.7 V1.24 V–0 V1.24 V1.24 V0 V0 V0 V1.23 V1.23 V1.23 V0 V0 V0 V0 V2.5 V0 V0 V1.25 V2.5 V2.5 V0 V2.5 V–0.8 V0.8 V1.25 V0.7 V1.25 V1.4 V0.7 V2.49 V2.49 V0 V

–2.49 V2.49 V0.7 V0.8 V––––––2.5 V0 V0 V2.1 V2.68 V2.57 V2.5 V0 V2.49 V2.49 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V2.38 V2.49 V2.5 V0 V0 V2.47 V2.49 V0 V2.44 V0 V0 V0 V–2.34 V1.47 V2.49 V2.49 V2.49 V2.49 V

0.27 V0.98 V2.5 V2.5 V2.5 V2.5 V2.39 V0 V2.4 V2.5 V2.5 V2.5 V1.27 V0 V0.64 V0 V1.6 V1.97 V0 V0 V0 V1.4 V0 V0 V1.33 V0 V1.4 V0 V0 V0 V2.49 V0 V2.47 V2.47 V0 V2.49 V0 V0 V2.49 V0 V2.47 V2.47 V2.5 V2.49 V0 V2.5 V2.49 V0 V2.49 V2.49 V

IC501

0 V0 V0 V0 V2.3 V0 V0 V0 V0 V1.24 V1.22 V1.23 V0 V0 V0.27 V0.31 V

0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V0 V-2.48 V0 V0 V2.29 V0.85 V0 V0 V0 V

IC701

IC842

0 V2.8 V2.6 V0 V2.5 V

IC202

IC351

IC651

IC200

IC404

IC871

IC353

IC601

IC703

IC771

IC801

IC354

3

1 2

456789

1011121314151617181920212223242526272829303132333435363738394041424344454647484950

51525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899

3

100

1 2

456789

1011121314151617181920212223242526272829303132333435363738394041424344454647484950

51525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899

3

1 2

456789

10111213141516

3

1 2

456789

101112131415161718192021222324

3

2

45

3

1 2

456789

101112131415161718192021222324

3

1 2

45678

3

1 2

45

3

1 2

45

3

1 2

45

3

1 2

456789

1011121314

3

1 2

45

3

1 2

45678

3

1 2

43

37 38

4041424344454647484950515253545556

39

1 2

456789

101112131415161718192021222324252627282930313233343536

3

1 2

456789

101112131415161718192021222324

3

1 2

45

3

0.79 V2.49 V1.3 V0 V2.49 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1.25 V1 V1.55 V0 V0 V1.24 V0 V0 V0 V0 V0 V0 V0 V0 V0.55 V0.55 V0.55 V1.39 V1.06 V2.5 V0.58 V0.94 V0.94 V0.94 V0.94 V1.8 V0 V2.02 V1.6 V1.6 V1.07 V1.85 V2.48 V1.65 V1.59 V1.07 V2.39 V1.88 V1.13 V

2.71 V1.59 V1.66 V2.47 V1.85 V0 V1.07 V1.39 V0.55 V0.55 V0.55 V2.71 V0 V0.58 V0.94 V0.94 V0.94 V0.94 V1.07 V1.8 V2.01 V1.61 V1.61 V0 V

0 V0 V4.45 V0 V0 V4.45 V0 V1.13 V4.45 V0 V1.13 V4.45 V0 V4.51 V

0 V2.7 V1.34 V0 V2.5 V

1.24 V2.49 V0 V1.25 V2.5 V

2.7 V0 V0 V0 V0 V0 V0 V2.7 V

2.7 V0 V0 V0 V–0.5 V0.5 V0 V

0 V2.7 V2.7 V0 V2.3 V

0 V0.8 V–0 V

0 V0 V0 V0 V0 V1.76 V-1.76 V0 V1.76 V0 V0.88 V0 V2.27 V0 V0 V1.76 V0 V-1.76 V-1.76 V0 V0 V0 V0 V0 V

––0 V0 V0 V

0 V0 V0 V2.47 V2.47 V0 V0 V0 V–0 V0 V0 V0 V1.3 V0 V0 V0 V0 V0 V0 V–0 V0.8 V0 V0.8 V2.46 V0 V0.65 V0 V0 V2.5 V2.5 V2.5 V0 V0 V0 V1.67 V0 V1.66 V1.3 V1.62 V0 V1.62 V1.3 V2.5 V2.5 V7.25 V1.24 V6.11 V1.24 V3.72 V1.24 V0 V0 V0 V1.3 V0 V0 V0 V0 V1.3 V0 V0 V0 V

5758596061626364

PIN NO. VOLTAGE

IC851

D SG

1.28 V0 V0.55 V

PIN NO. VOLTAGE

IC873

1 2

45

3

0 V7.43 V2.5 V0 V4.49 V

PIN NO. VOLTAGE

IC402

1 2

45678

3

0 V2.5 V0 V0 V2.5 V0 V2.5 V2.5 V

PIN NO. VOLTAGE

IC431

1 2

43

22.5 V2.5 V0 V0 V

2.5 V2.5 V0 V0 V2.5 V

PIN NO. VOLTAGE

IC251

1 2

43

1.3 V1.3 V–0 V

PIN NO. VOLTAGE

IC271

1 2

45

3

1 V0 V0.66 V1 V2.7 V

PIN NO. VOLTAGE

1

IC841

1.28 V2.8 V1.36 V1.28 V0 V

2

45

3 PIN NO. VOLTAGE

IC822

1 2

45678

3

1.25 V2.8 V0.7 V0 V1.2 V1.17 V1.16 V1.25 V

PIN NO. VOLTAGE

IC852

1 2

45678

3

1.28 V2.8 V0.47 V0 V1.17 V1.17 V1.16 V1.26 V

PIN NO. VOLTAGE

IC821

D SG

1.28 V0 V0.3 V

PIN NO. VOLTAGE

Q103

1 2

456

3

2.5 V2.5 V0.2 V2.5 V2.5 V2.5 V

PIN NO. VOLTAGE

Q442

1 2

456

3

5.17 V4.66 V4.66 V1.8 V0 V0 V

PIN NO. VOLTAGE

Q807

1 2

456

3

0 V0 V2.5 V––2.46 V

PIN NO. VOLTAGE

Q801

1 2

456

3

0.85 V0.9 V0.9 V0 V0 V0.77 V PIN

NO. VOLTAGE

Q804

1 2

456

3

0 V0 V0 V0 V0.58 V0.86 V

PIN NO. VOLTAGE

Q802

1 23

0 V1.3 V0.85 V

PIN NO. VOLTAGE

Q806

1 2

456

3

0 V0.56 V4.6 V0 V0 V0 V

PIN NO. VOLTAGE

Q253

1 2

456

3

5.39 V0 V0 V0 V2.5 V5.37 V

PIN NO. VOLTAGE

Q821

1 2

456

3

0 V0.5 V0 V0 V2.5 V5.37 V

PIN NO. VOLTAGE

Q261

1 2

456

3

0 V0 V0 V0 V0.55 V1.15 V

PIN NO. VOLTAGE

Q252

1 2

45678

3

1.3 V1.3 V1.3 V5.38 V4.94 V––1.3 V

Preform the measurement on the IC401 pin 37 in the TESTmode with GND short-circuited.(LCD is in "TEST" state.)

– 37 –

MD-MT877/MD-MT877C

WAVEFORMS OF MD CIRCUIT

NORM:200kS / s

1994 / 12 / 15 22:54:19

=Filter= =Offset= =Record Length=Smoothiing : OFFBW : FULL

CH1 : 0.00VCH2 : 0.000V

Main : 10KZoom : 10K

CH3 : 0.00VCH4 : 0.00V

=Trigger=Mode : NORMALType : EDGE CH4Detay : 0.0nsHold OFF : MINIMUM

T

TP208(FEMON)

CK204(FOK)

TP120(F+)

CK206(CIN)

StoppedCH1=1mVDC 10:1

CH3=5VDC 10:1

CH4=2VDC 10:1 (50ms/div)

50ms/divCH2=500mVDC 10:1

T

1

4

3

2

1

2

3

4

NORM:100MS / s

1994 / 12 / 16 00:24:17


CH1 : 0.00VCH2 : 0.00V

Main : 5KZoom : 5K

CH3 : 0.00VCH4 : 0.00V

=Trigger=Mode : AUTOType : EDGE CH3Detay : 0.0nsHold OFF : MINIMUM

T

IC501(9)(SDTi)

IC501(11)(MCLK)

IC501(12)(SCLK)

IC501(10)(LRCK)

StoppedCH1=2VDC 10:1

CH3=2VDC 10:1

CH4=2VDC 10:1 (50us/div)

50us/divCH2=2VDC 10:1

T

1

4

3

2

5

6

7

8

ENV

1994 / 12 / 16 01:03:40


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.000VCH4 : 0.00V


T

TP201 (EFMMON)

TP210(TEMON)

TP209(TOTMON)


CH3=500mVDC 10:1 (2ms/div)

2ms/divCH2=2VDC 10:1

T

1

2

9

10

11

ENV

1994 / 12 / 15 23:31:21


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.00VCH4 : 0.00V


T

IC201(25)(SPDRR)

VM

StoppedCH1=2VDC 10:1 (50ms/div)


T

1

2

12

13

FULL 20MHzBandwidth

ONSmooth

OFF

1994 / 12 / 18 09:26:46


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.00VCH4 : 0.00V


T

TP208 (FEMON)

TP210 (TEMON)


CH3=2VDC 10:1

CH4=2VDC 10:1 (1s/div)

1s/divCH2=2VDC 10:1

1

2

ENV

1

10

1994 / 12 / 16 01:23:16

=Filter=

=Tracel= P-P 1.280V

=Offset= =Record Length=Smoothiing : OFFBW : FULL

CH1 : 0.000VCH2 : 0.00V

Main : 1KZoom : 1K

CH3 : 0.00VCH4 : 0.00V


T

TP201(EFMMON)


500ms/div

1

MORM:200MS/s

9

1994 / 12 / 15 08:57:26


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.000VCH4 : 0.0V


T

TP201 (EFMMON)

TP210(TEMON)

TP209 (TOTMON)



1

2

ENV

T

CH3=500mVDC 10:1

9

10

11

1994 / 12 / 15 09:58:45


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.00VCH4 : 0.00V


T

TP208(FEMON)

TP210(TEMON)

IC201(25)(SPDRR)

VM


CH3=2VDC 10:1


1s/divCH2=2VDC 10:1

1

3

4

2

ENV

1

10

12

13

1994 / 12 / 15 08:39:46


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.00VCH4 : 0.0V


T

TP210 (TEMON)



1s/divCH2=2VDC 10:1

1

NORM:1kS/s

10

1994 / 12 / 15 21:54:52


CH1 : 0.00VCH2 : 0.00V


CH3 : 0.00VCH4 : 0.00V


T

T

TP201 (EFMMON)

TP210(TEMON)

TP121(T-)


CH3=1VDC 10:1

CH4=1VDC 10:1 (500us/div)


1

3

4

2

ENV

9

10

15

For TP208, TP209, and TP210, use the specific LPF, andobserve the waveform.

When watching the EEM monitor (TP201)Set MSL from 00H to 80H with EEPROM control setting. Aftercompletion restore 00H.

1994 / 12 / 15 09:10:03


CH1 : 0.000VCH2 : 0.00V

Main : 4KZoom : 4K

CH3 : 0.000VCH4 : 0.0V


T

CK108 (ADIPO)

StoppedCH1=500mVDC 10:1 (20us/div)


ENV

14

1000P

10KTP

Measurement

– 38 –

MD-MT877/MD-MT877C

TROUBLESHOOTINGUse the test mode which indicates trouble causes before repairing the unit. This mode records maximum 2 past errorcauses as codes. Refer them for repairing.

PreparationsIf dusts and foreign materials are accumulated on the pickup lens, playback sounds can be skipped or the TOC (Table of Contains)can't be displayed. Clean the object lens and check the playback. When lens are dirty, do the following.Turn off the power and wipe lens softly with a cleaning paper and a little marketing so as not to damage them.Do not touch lens with bare hands.

If the unit doesn't work.If the unit doesn't start after cleaning the pickup objects lens lens, check the unit as follows.

Is the power supply turned on when the remote controlbutton or main unit button is pressed ? No

Perform the check stated in item "Power is not turned onwhen the / button is pressed".

Perform the check stated in item "Abnormal display".No

Yes

Does the display operate normally ?

Is playback state set ?

Yes

Perform the check stated in item "Playback state cannot beset".No

Is audio output normal ?

Yes

Perform the check stated in item "Audio playback circuit".No

Is recording/playback operation normal ?

Yes

Perform the check stated in item "Recording/playbackoperation".No

• Power is not turned on when the / button ispressed.

NoYes

Is operation normal when the main body button is pressed ?

Is power turned on when the remote control button ispressed ?

NoDoes the pin 63 of IC401 oscillate ? Replace XL401.

Check the remote control, headphone terminals on themain unit (J703), IC401 and IC404.

• If "HOLD" appears, press and hold down STOP onthe main unit and cancel the HOLD mode.

No

No

Normal.Yes

Yes

– 39 –

MD-MT877/MD-MT877C

Yes

Check for defective solder joint of audio signal line betweenIC703 and J703.No

Yes

Is audio waveform output from J703 pins 3 and 4.

Check the pins 4 and 21 of IC703.No

Yes

Is audio waveform output from IC703 pins 8 and 17.

Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,12.No

• Abnormal display.

No

Yes

Are the pin 2 (VCC) and pin 12, 13 (GND) normal ?Is waveform output from IC401 pins 31 to 33 ?Is waveform output from CN451 pins 3 to 5 ?

Yes

Check between IC401 andCN451.

No

Check the periphery of IC401.

• Audio playback clrcult.

Is audio waveform output from IC501 pins 15 and 16 ?

Check headphones jack, and periphery of headphone.

In the normal playback mode, LCD play time display functions, but no audio is heard.

Check for pattern breakage of flexible PWB, check fordefects of display microcomputer (replace the display unit).

• The spindle motor fails to run. Does the head move.

NoDoes the waveform appear on the IC201 pins 24 and 25 afterTEST mode AUTO2 completion and in this state ?

Check the IC201 periphery.

Yes

Does waveform appear on the IC601 pin 15 ?

Does waveform appear on IC601 pins 7, 10 and 12 ?

Replace the spindle motor.

YesNo

L608, IC201, IC601, CN601 and flex, etc. soldering check.

NoReplace IC601.

Yes

– 40 –

MD-MT877/MD-MT877C

• Recording/playback operation.

Yes

Does the head move down, failing to start record evenwhen the continuous record mode is set after address ?

No

Does level of pins 43 of IC401 and pin 86 of changedepending on record and playback ?

Is RF pattern output from IC201 pin 50 ?

Yes

NoCheck for soldering failure of IC201 .

NoCheck periphery of IC401 and IC101.

Check whether there is any damage in IC101, periphery oflaser diode.

Yes

Check for defects of IC351 in head drive flexible PWB,head, flexible PWB.

No

No

Check the periphery of IC501 and the waveform of the pins70 to 73 of IC201.

No

Check whether the voltage of pins 13 to 15 of IC701 varies withthe recording VOLUME +/– button operation. Check whether thesoldering of IC701 is poor.

No

Check whether the audio signal line between IC701 and J701 isdefective.

Is audio waveform observed on the pins 10 and 12 of IC701 ?

Yes

Check whether input waveform is observed on the pins 5and 6 of IC701.

Yes

Check voltage of pins 57 and 58 of IC201, pins 2, 3, 6, and 7 ofIC651, pins 4 and 5 of CN601. Check whether disc is record-inhibited.

Does the RF waveform appear at TP201 when recording/Playback is performed.

Check whether the pin 7 of IC501 and the pin 81 of IC201 are inH state.

Yes

Yes

Is the output waveform output to the pin 8 of IC501 ?

Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H.

Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.

– 41 –

MD-MT877/MD-MT877C

FUNCTION TABLE OF IC

1 PE5 SYRS Output System LSI register selection output.

2 PE6 _SYRD Output System LSI read enable output.

3 PE7 _SYWR Output System LSI write enable output.

4-11 PD0-PD7 SYD0-SYD7 Input/Output System LSI parallel data bus.

12 CVCC CVCC Input Power supply of internal voltage drop circuit.

13 PC0 PCLAT Output Record audio IC data latch output.

14 Vss VSS — Ground potential.

15 PC1 _MCPGI Input Microphone plug insertion detection input.

16 PC2 _INPGI Input Line/digital plug insertion detection.

17 PC3 INPGCK Input Line/digital plug type detection.

18 PC4 RCPCNT Input/Output Record circuit power control output.

19* PC5 TEST1 Input Test mode setting input 1.

20* PC6 TEST0 Input Test mode setting input 0.

21 PC7 JPNP Input Kana conversion/Kana input existence/nonexistence discrimination.

22 PB0 OPICGA Output P.U detection sensitivity switching output.

23 PB1 RFRCNT Output RF_LSI power supply ON/OFF control output.

24 TIOCC3 BUZOUT Output Beep sound pulse output.

25 PB3 SGAIN Output RF amp gain pllarity switching output.

26 PB4 DISCP Output RF amp TE polarity switching output.

27* TIOCB4 MCMON Output Internal operation status monitor.

28 PB6 RACLK Output Audio IC data clock output.

29 PB7 RADAT Output Audio IC serial data output.

30 PA0 CHGCNT Output Charge control.

31 TxD2 DSPDAT Output Unit indication data output.

32 PA2 DSPSTB Output Unit display strobe output.

33 SCK2 DSPSCK Output Unit indication data clock output.

34 P10 PBOPON Output Audio IC output stage control output.

35* P11 P11 Output Reserve

36 P12/TCLKA CIN Input Track cross signal/focus drive detection.

37 TCLKB SPIN Input Spindle motor FG pulse detection input.

38 IRQ0 _DINT Input System LSI interruption.

39 P15 DISCPR Input Disc record inhibition switch input.

40 IRQ1 ARQD Input Disk cap opens and closes detection/it is started and required.

41* P17 P17 Output Reserve

42 AVSS AVSS — A/D and D/A converter ground potential.

43 DA1 LDVAR Output P.U. laser power setting output.

44* DA0 PA0 Output Reserve

45 AN7 RKCNG Input Remote control button operation detection input.

46 AN6 TEMP Input Ambient temperature detection input.

47 AN5 HKEY2 Input Unit button operation detection input 2.

48 AN4 HKEY1 Input Unit button operation detection input 1.

49 AN3 RKEY Input Remote control button operation detection input.

50 AN2 STDCK Input Lithium battery voltage detection input.

51 AN1 PLVDCI Input DC IN voltage detection input.

52 AN0 PLVBAT Input DC voltage detection input.

53 Vref VREF — A/D and D/A converter reference voltage.

54 AVCC AVCC Input A/D and D/A converter positive power supply.

55 MD0 MD0 Input Operation mode selection input 0.


57* OSC2 OSC2 — Sub clock (not used).

IC401 RH-iX0419AWZZ :System Microcomputer (IX0419AW) (1/2)Pin No. FunctionPort Name Terminal Name Input/Output

In this unit, the terminal with asterisk mark (*) is open terminal which is not connected to the outside.

– 42 –

MD-MT877/MD-MT877C

58 OSC1 OSC1 — Sub clock.

59 RES _RESET Input Microcomputer hard reset input.

60 NMI DCIN Input DC IN edge detection.

61 STBY _STBY Input Microcomputer standby input (not used).

62 VCC VCC Input Positive power supply.

63 XTAL XTAL — Crystal connection terminal.

64 Vss VSS — Ground potential.

65 EXTAL EXTAL — Crystal connection terminal.

66 FWE FWE Input Flash write enable.


68 PF7 _EJSW Input Ejection lever operation detection input.

69 PF6 SLCNT3 Output Stepping control 3.



72 PF3/ADTRG _RPLAY Input Remote control PLAY button operation detection input.

73 PF2 SENSE Input System LSI servo sense input.

74 PF1 _FOK Input Focus OK signal input.

75 FP0/IRQ2 _DCEXT Input DC-IN detection (level).

76 TxD0 RMDAT Output Remote control indication data/PC link data output.

77 RxD0 PCLDI Input PC link data input.

78* SCK0 SCK0 Output Serial I/O clock output (not used).

79 P33 _ELON Output EL lighting control output L.

80 P34 LEDCTB Output LED lighting control (Blue).

81 P35 _STOP Input Unit stop button control detection input.

82 P36 LEDCTR Output LED lighting control (Orange).

83 P77 DCNT Output Mechanism driver enable output.

84 P76 BATON Output Battery power supply line ON/OFF.

85 P75 LDON Output P.C. laser ON/OFF control output.

86 P74 PBLAT Output Audio PC data clock output.

87 P73 PCNT3 Output _DC IN input control output.

88 P72 DCON Output DC power supply line ON/OFF.

89 P71 PCNT2 Output START Tr ON/OFF.

90 P70 EMPH0 Output Audio output emphasis control 0.

91 PG0/IRQ6 _PLAY Input Unit PLAY button operation detection input.

92 PG1/IRQ7 _REC Input Unit REC button operation detection.

93 PG2 _XRST Output System LSI hard reset output.

94 PG3 CKSTP Output Microcomputer standby operation monitor.

95 PG4 LEDCTG Output LED lighting control (Yellow-green).

96 PE0 _EPCS Output EEPROM chip selection output.

97 PE1 EEPD Input/Output EEPROM serial data input/output.

98 PE2 EEPK Output EEPROM serial clock output.

99 PE3 EPRT Output EEPROM write protection control output.

100 PE4 PCNT1 Output System power supply ON/OFF control output.

IC401 RH-iX0419AWZZ :System Microcomputer (IX0419AW) (2/2)Pin No. FunctionPort Name Terminal Name Input/Output


– 43 –

MD-MT877/MD-MT877C

56* EXPORT4 Undecided justice Output Not used Not used

57 EXPORT5 LDCNT1 Output Recording head raising-lowering control output 0. See the separate table *3.

58 EXPORT6 LDCNT2 Output Recording head raising-lowering control output 1. See the separate table *3.

59 EXPORT7 EMPH1 Output Audio emphasis control output 1. See the separate table *2.

78 EXPORT3 HDON Output Recording head. 'H': Record electric current

79 EXPORT2 OPTCNT Output Optical digital input circuit ON/OFF control. 'H': Circuit operation ON

80 EXPORT0 DAPON Output D/A converter operation control output. 'H': Operation ON

81 EXPORT1 ADPON Output A/D converter operation control output. 'H': Operation ON

Pin No. FunctionPort Name Terminal Name Input/Output Remarks

H H Normal mode

H L No adjustment mode

L H Test mode

L L (Settings prohibited)

TEST1 Details

*1: List of TEST port settings

H H fs=32K: 'ON'

H L fs=48K: 'ON'

L H OFF

L L fs=44.1K: 'ON'

EMPH1 EMPH0 Details

*2: List of EMPH port settings

H H Brake

H L Drive UP

L H Drive DOWN

L L Output OFF

LDCNT2 LDCNT1 Details

*3: List of LDCNT port settingsTEST0

IC201 VHiLR378161-1 :Endec/Servo/Atrac (LR378161)System LSI expansion output port


– 44 –

MD-MT877/MD-MT877C

— M E M O —

MD-MT877/MD-MT877C

PARTS GUIDE

NOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones for maintaining the safety and performance of the set.

“HOW TO ORDER REPLACEMENT PARTS”To have your order filled promptly and correctly, please furnish thefollowing information.

1. MODEL NUMBER 2. REF. No.3. PART NO. 4. DESCRIPTION

MARK: SPARE PARTS-DELIVERY SECTION

For U.S.A. onlyContact your nearest SHARP Parts Distributor to order.

For location of SHARP Parts Distributor,Please call Toll-Free;1-800-BE-SHARP

Explanation of capacitors/resistors parts codesCapacitorsVCC ....................... Ceramic typeVCK........................ Ceramic typeVCT ........................ Semiconductor typeVC • • MF ............... Cylindrical type (without lead wire)VC • • MN ............... Cylindrical type (without lead wire)VC • • TV ................ Square type (without lead wire)VC • • TQ ............... Square type (without lead wire)VC • • CY ............... Square type (without lead wire)VC • • CZ ............... Square type (without lead wire)VC • • • • • • • • • J .. The 13th character represents capacity difference.

("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%, "C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.)

If there are no indications for the electrolytic capacitors, error is ±20%.

ResistorsVRD ....................... Carbon-film typeVRS........................ Carbon-film typeVRN ....................... Metal-film typeVR • • MF ............... Cylindrical type (without lead wire)VR • • MN ............... Cylindrical type (without lead wire)VR • • TV ................ Square type (without lead wire)VR • • TQ ............... Square type (without lead wire)VR • • CY ............... Square type (without lead wire)VR • • CZ ............... Square type (without lead wire)VR • • • • • • • • • J .. The 13th character represents error.

("J" ±5%, "F" ±1%, "D" ±0.5%.)

If there are no indications for other parts, the resistors are ±5%carbon-film type.

MD-MT877(S)MODEL MD-MT877C(S)

PORTABLE MINIDISC RECORDER

PRICERANK

DESCRIPTIONNO. PARTS CODE NO. PARTS CODE PRICERANK DESCRIPTION

MD-MT877/MD-MT877C

– 1 –

INTEGRATED CIRCUITS

IC101 VHIIR3R58M/-1 J AM RF Signal Processor,IR3R58MIC200 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522IC201 VHILR378161-1 J BQ Endec/Servo/Atrac,LR378161IC202 RH-IX2824AFZZ J AX 16MBit D-RAM,IX2824AFIC251 VHIS80808LN-1 J AE Reset,S-80808LNPIC271 VHI75S54FU+-1 J AG OP AMP,FT75S54FUIC351 VHI74ACT02T-1 J AE Head Driver,74ACT02FTIC353 VHIFTD2005/-1 J AG Head Driver,FTD2005IC354 VHICPH5608/-1 J AH Head Driver,CPH5608IC401 RH-IX0419AWZZ J BE System Microcomputer,

IX0419AWIC402 VHI58X2404T-1 J AF EEPROM,58X2404TIC404 VHIN7SZ86P5-1 J AE Gate IC,N7SZ86P5IC431 VHIS80820LN-1 J AD Reset,S-80820LNPIC501 VHIAK4551VT-1 J AU AD/DA Converter,AK4551VTIC601 VHIBD6640KV-1 J BA Moter Drive,BD6640KVIC651 VHILB1938T+-1 J AL Motor Drive,LB1938TIC701 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54NIC703 VHIIR3R59N/-1 J AN Audio Amp.,IR3R59NIC771 VHI62GR2322-1 J AF 2.3V Regulator,62GR2322IC801 VHIS80814LN-1 J AE Reset,S-80814ALNPIC821 VSCPH3413++-1 J AE N-ch MOS FET,CPH3413IC822 VHIIR3M14N/-1 J AK DC/DC Converter,IR3M14NIC841 VHI6372C281-1 J AH 2.8V UP Converter,

XC6372C281PRIC842 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522IC851 VSCPH3413++-1 J AE N-ch MOS FET,CPH3413IC852 VHIIR3M14N/-1 J AK DC/DC Converter,IR3M14NIC871 VHITC7S86FU-1 J AE Exclusive or Gate,TC7S86FUIC873 VHI62GR4522-1 J AG 4.5V Regulator,62GR4522

TRANSISTORS

Q103 VHIFDG312P/-1 J AD P-ch Power MOS,FDG312 PQ251 VS2SA17457/-1 J AB Silicon,PNP,2SA17457Q252 VSFTD2017++-1 J AL N-ch MOS FET,FTD2017Q253 VHIRN4904//-1 J AD Power Select Charge Drive,

RN4904Q254 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GRQ261 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FUQ442 VSRN4911+++-1 J AD Digital Transistor,RN4911Q443 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GRQ493 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GRQ711 VSRN1444A//-1 J AC Digital,NPN,RN1444 AQ721 VS2SD1979S+-1 J AC Silicon,NPN,2SD1979 SQ801 VHIRN4904//-1 J AD Power Select Charge Drive,

RN4904Q802 VSFDN339N++-1 J AG N-ch MOS FET,FDN339 NQ803 VS2SA17457/-1 J AB Silicon,PNP,2SA17457Q804 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FUQ805 VS2SA1832GR-1 J AC Silicon,PNP,2SA1832 GRQ806,807 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FUQ821 VHIHN1C01FU-1 J AD Power Transistor,HN1C01 FUQ825 VSDTC144EE/-1 J AB Digital,NPN,DTC144 EEQ901 VSRN1104///-1 J AB Digital,NPN,RN1104QA01 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GR

DIODES

D351 VHDSBE803//-1 J AD Silicon,SBE803D431 VHD1SS361//-1 J AB Silicon,1SS361D432 VHD1SS372//-1 J AD Silicon,1SS372D491 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1YD492 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5YD493 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1YD494 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5YD495,496 VHEMA8075M/-1 J AC Zener,7.5V,MA8075MD651 VHDF10J2E//-1 J AC Silicon,F10J2ED771,772 VHDF10J2E//-1 J AC Silicon,F10J2ED801 VHDRB521S30-1 J AC Silicon,RB521S30D821 VHDD1FH3+++-1 J AE Schottky,D1FH3D822 VHDHRB0103B-1 J AC Silicon,HRB0103BD831,832 VHDHRB0103B-1 J AC Silicon,HRB0103BD841 VHDF10J2E//-1 J AC Silicon,F10J2ED842 VHDHRB0103B-1 J AC Silicon,HRB0103BD851,852 VHDF10J2E//-1 J AC Silicon,F10J2ED861,862 VHDF10J2E//-1 J AC Silicon,F10J2ELEDA02 VHPTLGU1008-1 J AE LED,Yellow-green,TLGU1008LEDA03 VHPCL190HBX-1 J AR LED,Blue,CL190HBXLEDA04 VHPTLOU1008-1 J AE LED,Orange,TLOU1008

COILS

L100 VPBNN100K0000 J AC 10 µHL103 RCILC0353AFZZ J AB Tip Solid Induction,100mAL171 RCILC0356AFZZ J AC 10 µHL202 VPBNN100K0000 J AC 10 µHL204 RCILC0353AFZZ J AB Tip Solid Induction,100mAL452 RCILC0352AFZZ J AB Tip Impeder,150mAL453,454 RCILC0353AFZZ J AB Tip Solid Induction,100mAL456~458 RCILC0353AFZZ J AB Tip Solid Induction,100mAL491 VRS-TV2AB330J J AA 33 ohms,1/10WL601,602 RCILC0372AFZZ J AC 22 µH,ChokeL603 RCILC0358AFZZ J AC 4.7 µH,ChokeL604 RCILC0372AFZZ J AC 22 µH,ChokeL608 RCILC0356AFZZ J AC 10 µHL702,703 RCILC0353AFZZ J AB Tip Solid Induction,100mAL704 RCILC0352AFZZ J AB Tip Impeder,150mAL711 RCILC0352AFZZ J AB Tip Impeder,150mAL712~714 RCILC0353AFZZ J AB Tip Solid Induction,100mAL821 RCILC0005AWZZ J AF 10 µH,ChokeL841 RCILC0358AFZZ J AC 4.7 µH,ChokeL851 RCILC0005AWZZ J AF 10 µH,Choke

VIBRATORS

XL201 RCRSC0028AFZZ J AH Crystal,33.8688 MHzXL401 RCRM-0039AWZZ J AF Ceramic,3.68 MHz

CAPACITORS

C100 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC102,103 VCKYCY0JB105K J AC 1 µF,6.3VC106 VCKYCY0JB105K J AC 1 µF,6.3VC107 VCKYCZ1AB104K J AB 0.1 µF,10VC108,109 VCKYCY0JB105K J AC 1 µF,6.3VC110 VCKYCY1AB224K J AB 0.22 µF,10VC111 VCKYCY0JB105K J AC 1 µF,6.3VC112 VCKYCZ1AB104K J AB 0.1 µF,10VC113 VCKYCY0JB105K J AC 1 µF,6.3VC114 VCCCCZ1HH5R0C J AB 5 pF (CH),50VC121,122 VCKYCZ1HB221K J AB 220 pF,50VC123,124 VCKYCZ1HB331K J AB 330 pF,50VC130,131 VCKYCZ1AB104K J AB 0.1 µF,10VC132,133 VCKYCY1AB224K J AB 0.22 µF,10VC151 VCKYCZ1CB103K J AB 0.01 µF,16VC165 VCKYCZ1AB333K J AB 0.033 µF,10VC171,172 RC-SZ0002AWZZ J AD 33 µF,6.3V,ElectrolyticC200 VCKYCY0JB105K J AC 1 µF,6.3VC201 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC202 VCSATK0JJ476M J AD 47 µF,6.3V,Electrolytic,TantalumC203 VCKYCZ1AB104K J AB 0.1 µF,10VC204 VCKYCY1AB474K J AC 0.47 µF,10VC205 VCKYCZ1AB104K J AB 0.1 µF,10VC207 VCKYCZ1AB104K J AB 0.1 µF,10VC209,210 VCKYCZ1AB104K J AB 0.1 µF,10VC211 VCCCCZ1HH5R0C J AB 5 pF (CH),50VC212 VCCCCZ1HH8R0D J AB 8 pF (CH),50VC251,252 VCKYCZ1AB104K J AB 0.1 µF,10VC253 VCKYCZ1CB103K J AB 0.01 µF,16VC270 VCKYCY0JB105K J AC 1 µF,6.3VC272~274 VCKYCZ1AB104K J AB 0.1 µF,10VC291 VCKYCY0JB105K J AC 1 µF,6.3VC292 VCKYCZ1CB103K J AB 0.01 µF,16VC351 VCCCCY1HH470J J AA 47 pF (CH),50VC353 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC354 VCKYCZ1AB104K J AB 0.1 µF,10VC357 VCKYCZ1AB104K J AB 0.1 µF,10VC361 VCKYTV1HB393K J AB 0.039 µF,50VC401 VCKYCZ1AB104K J AB 0.1 µF,10VC431 VCKYCY1AB474K J AC 0.47 µF,10VC451 VCKYCY1EB223K J AB 0.022 µF,25VC454 VCKYCZ1HB222K J AB 0.0022 µF,50VC491 VCKYTV1CB104K J AA 0.1 µF,16VC492 VCKYCY0JB105K J AC 1 µF,6.3VC493 VCKYCY1AB474K J AC 0.47 µF,10VC500 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC501,502 VCKYCZ1HB222K J AB 0.0022 µF,50VC503 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,TantalumC505,506 VCKYCZ1HB102K J AB 0.001 µF,50VC509,510 VCKYCY0JB105K J AC 1 µF,6.3VC511 VCKYCZ1AB104K J AB 0.1 µF,10VC600 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,Tantalum

NO. PRICERANK DESCRIPTIONPARTS CODENO. PARTS CODE PRICE

RANK DESCRIPTION

MD-MT877/MD-MT877C

C601~604 VCKYCY0JB105K J AC 1 µF,6.3VC605 VCKYCZ1AB104K J AB 0.1 µF,10VC608 VCKYTV1AB105K J AD 1 µF,10VC652 VCKYCZ1AB104K J AB 0.1 µF,10VC701,702 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC703 VCKYCZ1CB103K J AB 0.01 µF,16VC711,712 VCCCCZ1HH101J J AB 100 pF (CH),50VC713,714 VCKYCY0JB105K J AC 1 µF,6.3VC715 VCKYCZ1AB104K J AB 0.1 µF,10VC721,722 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,TantalumC723,724 VCKYCZ1HB102K J AB 0.001 µF,50VC725,726 VCSAPR1AJ335M J AD 3.3 µF,10V,Electrolytic,TantalumC731 VCKYCY1AB224K J AB 0.22 µF,10VC733,734 VCKYCZ1AB104K J AB 0.1 µF,10VC753,754 VCKYCY0JB105K J AC 1 µF,6.3VC758 VCKYCY0JB105K J AC 1 µF,6.3VC760 VCKYCZ1AB104K J AB 0.1 µF,10VC763,764 VCKYCY0JB105K J AC 1 µF,6.3VC765,766 VCKYCY1AB224K J AB 0.22 µF,10VC771 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,TantalumC773 VCKYCY1AB224K J AB 0.22 µF,10VC774~776 VCKYCY0JB105K J AC 1 µF,6.3VC817 VCKYCZ1AB104K J AB 0.1 µF,10VC821 VCKYTQ1AB335K J AF 3.3 µF,10VC822 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,TantalumC823 VCEAPW0GW227M J AD 220 µF,4.0V,ElectrolyticC825 VCKYCY0JB105K J AC 1 µF,6.3VC826,827 VCCCCZ1HH820J J AB 82 pF (CH),50VC828 VCKYCY0JB105K J AC 1 µF,6.3VC830 VCKYCY0JB105K J AC 1 µF,6.3VC832,833 VCKYCY1CB104K J AB 0.1 µF,16VC834 VCKYCZ1AB104K J AB 0.1 µF,10VC836 VCKYCY1AB474K J AC 0.47 µF,10VC837 VCKYCY0JB105K J AC 1 µF,6.3VC838 VCKYCY1CB104K J AB 0.1 µF,16VC839 VCKYCY1AB334K J AC 0.33 µF,10VC840 VCEAPW0GW227M J AD 220 µF,4.0V,ElectrolyticC841 VCKYCY0JB105K J AC 1 µF,6.3VC842 RC-SZ0002AWZZ J AD 33 µF,6.3V,Electrolytic,TantalumC843 VCKYCY1AB224K J AB 0.22 µF,10VC844 VCSAPR0JJ106M J AD 10 µF,6.3V,Electrolytic,TantalumC845,846 VCKYCZ1AB104K J AB 0.1 µF,10VC847,848 VCKYCY0JB105K J AC 1 µF,6.3VC850 VCKYCZ1AB104K J AB 0.1 µF,10VC851 VCKYTQ1AB335K J AF 3.3 µF,10VC852 RC-SZ0001AWZZ J AG 22 µF,6.3V,Electrolytic,TantalumC856 VCCCCZ1EH151J J AB 150 pF (CH),25VC857 VCCCCZ1HH330J J AB 33 pF (CH),50VC858~860 VCKYCY0JB105K J AC 1 µF,6.3VC862,863 VCKYCY0JB105K J AC 1 µF,6.3VC869 VCSATE0JJ476M J AD 47 µF,6.3V,Electrolytic,TantalumC876 VCKYCY0JB105K J AC 1 µF,6.3VC881 VCKYCZ1AB273K J AB 0.027 µF,10VC901 VCKYCY0JB105K J AC 1 µF,6.3VC902 VCKYCZ1CB103K J AB 0.01 µF,16VC905~907 VCKYCZ1HB222K J AB 0.0022 µF,50VC908 VCKYCY1AB334K J AC 0.33 µF,10VC909,910 VCKYCZ1AB473K J AB 0.047 µF,10VC911,912 VCKYCZ1AB104K J AB 0.1 µF,10VCA01,02 VCKYCY1CB104K J AB 0.1 µF,16V

RESISTORS

VRS-CZ1JB000J J AB 0 ohm,Jumper,0.5×1.0mmR101~104 VRS-CZ1JB223J J AB 22 kohms,1/16WR111 VRS-CZ1JB123J J AB 12 kohms,1/16WR112 VRS-CZ1JB224J J AA 220 kohms,1/16WR131 VRS-CZ1JB154D J AA 150 kohms,1/16WR132 VRS-CZ1JB105D J AA 1 Mohm,1/16WR133 VRS-CZ1JB154D J AA 150 kohms,1/16WR134 VRS-CZ1JB105D J AA 1 Mohm,1/16WR135 VRS-CZ1JB563D J AA 56 kohms,1/16WR136 VRS-CZ1JB394D J AA 390 kohms,1/16WR137 VRS-CZ1JB563D J AA 56 kohms,1/16WR138 VRS-CZ1JB394D J AA 390 kohms,1/16WR139 VRS-CZ1JB393J J AB 39 kohms,1/16WR140 VRS-CZ1JB394J J AA 390 kohms,1/16WR151 VRS-CZ1JB104J J AA 100 kohm,1/16WR161 VRS-CZ1JB122J J AB 1.2 kohms,1/16WR200 VRS-CZ1JB104D J AA 100 kohm,1/16WR204 VRS-CZ1JB102J J AB 1 kohm,1/16WR205 VRS-CZ1JB273D J AA 27 kohms,1/16W

R206 VRS-CZ1JB104D J AA 100 kohm,1/16WR207 VRS-CZ1JB681J J AB 680 ohms,1/16WR222 VRS-CZ1JB105J J AB 1 Mohm,1/16WR251 VRS-CZ1JB220J J AB 22 ohms,1/16WR252 VRS-CZ1JB564J J AA 560 kohms,1/16WR253 VRS-CZ1JB333J J AB 33 kohms,1/16WR254 VRS-CZ1JB105J J AB 1 Mohm,1/16WR255 VRS-CZ1JB564J J AA 560 kohms,1/16WR256 VRS-CZ1JB104J J AA 100 kohm,1/16WR257 VRS-CZ1JB105J J AB 1 Mohm,1/16WR258 VRS-CZ1JB334J J AA 330 kohms,1/16WR259 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR261 VRS-CZ1JB105J J AB 1 Mohm,1/16WR262 VRS-CZ1JB334J J AA 330 kohms,1/16WR263 VRS-CZ1JB104J J AA 100 kohm,1/16WR264 VRS-CZ1JB101J J AB 100 ohm,1/16WR271,272 VRS-CZ1JB474D J AA 470 kohms,1/16WR273 VRS-CZ1JB473D J AA 47 kohms,1/16WR274 VRS-CZ1JB563D J AA 56 kohms,1/16WR275 VRS-CZ1JB153D J AA 15 kohms,1/16WR276 VRS-CZ1JB124D J AB 120 kohms,1/16WR277 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR278 VRS-CZ1JB220J J AB 22 ohms,1/16WR281 VRS-CZ1JB102J J AB 1 kohm,1/16WR282 VRS-CZ1JB473J J AA 47 kohms,1/16WR291 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR292 VRS-CZ1JB104J J AA 100 kohm,1/16WR351 VRS-TV2AB3R9J J AA 3.9 ohms,1/10WR361 VRS-TQ2BB150J J AA 15 ohms,1/8WR402 VRS-CZ1JB104D J AA 100 kohm,1/16WR403 VRS-CZ1JB102J J AB 1 kohm,1/16WR404 VRS-CZ1JB104J J AA 100 kohm,1/16WR405 VRS-CZ1JB103J J AA 10 kohm,1/16WR406 VRS-CZ1JB223J J AB 22 kohms,1/16WR407,408 VRS-CZ1JB104J J AA 100 kohm,1/16WR411 VRS-CZ1JB104J J AA 100 kohm,1/16WR412 VRS-CZ1JB153J J AA 15 kohms,1/16WR413~416 VRS-CZ1JB102J J AB 1 kohm,1/16WR422 VRS-CZ1JB104J J AA 100 kohm,1/16WR423 VRS-CZ1JB223D J AB 22 kohms,1/16WR424,425 VRS-CZ1JB223J J AB 22 kohms,1/16WR431 VRS-CZ1JB334J J AA 330 kohms,1/16WR441 VRS-CZ1JB121J J AB 120 ohms,1/16WR442 VRS-CZ1JB821J J AA 820 ohms,1/16WR445 VRS-CZ1JB103J J AA 10 kohm,1/16WR461 VRS-CZ1JB104J J AA 100 kohm,1/16WR462 VRS-CZ1JB223J J AB 22 kohms,1/16WR463 VRS-CZ1JB104J J AA 100 kohm,1/16WR464 VRS-CZ1JB224J J AA 220 kohms,1/16WR492 VRS-CZ1JB102J J AB 1 kohm,1/16WR495 VRS-CZ1JB102J J AB 1 kohm,1/16WR496 VRS-CZ1JB220J J AB 22 ohms,1/16WR501,502 VRS-CZ1JB471J J AA 470 ohms,1/16WR701,702 VRS-CZ1JB101J J AB 100 ohm,1/16WR703 VRS-CZ1JB104J J AA 100 kohm,1/16WR710 VRS-CZ1JB470J J AB 47 ohms,1/16WR711,712 VRS-CZ1JB682J J AB 6.8 kohms,1/16WR713,714 VRS-CZ1JB103J J AA 10 kohm,1/16WR715,716 VRS-CZ1JB104J J AA 100 kohm,1/16WR717,718 VRS-CZ1JB102J J AB 1 kohm,1/16WR719,720 VRS-CZ1JB682J J AB 6.8 kohms,1/16WR723,724 VRS-CZ1JB682J J AB 6.8 kohms,1/16WR725 VRS-CZ1JB101J J AB 100 ohm,1/16WR726 VRS-CZ1JB393J J AB 39 kohms,1/16WR727 VRS-CZ1JB822J J AA 8.2 kohms,1/16WR728 VRS-CZ1JB102J J AB 1 kohm,1/16WR729,730 VRS-CZ1JB472J J AB 4.7 kohms,1/16WR731~733 VRS-CZ1JB473J J AA 47 kohms,1/16WR754 VRS-CZ1JB184J J AB 180 kohms,1/16WR757 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR758 VRS-CZ1JB101J J AB 100 ohm,1/16WR761 VRS-CZ1JB394J J AA 390 kohms,1/16WR762 VRS-CZ1JB104J J AA 100 kohm,1/16WR765,766 VRS-CZ1JB150J J AB 15 ohms,1/16WR801 VRS-CZ1JB473J J AA 47 kohms,1/16WR802 VRS-CZ1JB104J J AA 100 kohm,1/16WR803 VRS-CZ1JB102J J AB 1 kohm,1/16WR804 VRS-CZ1JB334J J AA 330 kohms,1/16WR805 VRS-CZ1JB105J J AB 1 Mohm,1/16WR806,807 VRS-CZ1JB104J J AA 100 kohm,1/16WR808 VRS-CZ1JB564J J AA 560 kohms,1/16WR809 VRS-CZ1JB473J J AA 47 kohms,1/16W

– 2 –

PRICERANK

DESCRIPTIONNO. PARTS CODE NO. PARTS CODE PRICERANK DESCRIPTION

MD-MT877/MD-MT877C

R810 VRS-CZ1JB223J J AB 22 kohms,1/16WR812 VRS-CZ1JB104J J AA 100 kohm,1/16WR813 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR814 VRS-CZ1JB273J J AA 27 kohms,1/16WR815~817 VRS-CZ1JB104J J AA 100 kohm,1/16WR818 VRS-CZ1JB473J J AA 47 kohms,1/16WR821 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR822 VRS-CZ1JB104J J AA 100 kohm,1/16WR823 VRS-CZ1JB274J J AB 270 kohms,1/16WR824 VRS-CZ1JB103J J AA 10 kohm,1/16WR825 VRS-CZ1JB394D J AA 390 kohms,1/16WR826 VRS-CZ1JB395J J AA 3.9 Mohms,1/16WR827 VRS-CZ1JB274D J AK 270 kohms,1/16WR828 VRS-CZ1JB222J J AB 2.2 kohms,1/16WR829 VRS-CZ1JB104J J AA 100 kohm,1/16WR831,832 VRS-CZ1JB184D J AB 180 kohms,1/16WR833 VRS-CZ1JB470J J AB 47 ohms,1/16WR834 VRS-CZ1JB155J J AA 1.5 Mohms,1/16WR841 VRS-CZ1JB104J J AA 100 kohm,1/16WR844 VRS-CZ1JB470J J AB 47 ohms,1/16WR850 VRS-CZ1JB223J J AB 22 kohms,1/16WR853 VRS-CZ1JB274J J AB 270 kohms,1/16WR854 VRS-CZ1JB103J J AA 10 kohm,1/16WR855 VRS-CZ1JB184D J AB 180 kohms,1/16WR857 VRS-CZ1JB564D J AA 560 kohms,1/16WR871 VRS-CZ1JB103J J AA 10 kohm,1/16WR881 VRS-CZ1JB183J J AA 18 kohms,1/16WR882 VRS-CZ1JB103J J AA 10 kohm,1/16WR903 VRS-CZ1JB471J J AA 470 ohms,1/16WR904 VRS-CZ1JB103J J AA 10 kohm,1/16WR905 VRS-CZ1JB104J J AA 100 kohm,1/16WR906 VRS-CZ1JB274J J AB 270 kohms,1/16WR907 VRS-CZ1JB184J J AB 180 kohms,1/16WR908 VRS-CZ1JB104J J AA 100 kohm,1/16WR909 VRS-CZ1JB103J J AA 10 kohm,1/16WR920 VRS-CZ1JB104J J AA 100 kohm,1/16WRA01 VRS-CY1JB562J J AA 5.6 kohms,1/16WRA02 VRS-CY1JB822J J AA 8.2 kohms,1/16WRA03 VRS-CY1JB183J J AA 18 kohms,1/16WRA04 VRS-CY1JB563J J AA 56 kohms,1/16WRA05 VRS-CY1JB562J J AA 5.6 kohms,1/16WRA06 VRS-CY1JB822J J AA 8.2 kohms,1/16WRA07 VRS-CY1JB183J J AA 18 kohms,1/16WRA08 VRS-CY1JB563J J AA 56 kohms,1/16WRA12 VRS-CY1JB333F J AA 33 kohms,1/16WRA13,14 VRS-CY1JB183F J AA 18 kohms,1/16WRA15 VRS-CY1JB103J J AA 10 kohm,1/16WRA16 VRS-CY1JB331J J AA 330 ohms,1/16W

OTHER CIRCUITRY PARTS

CN101 QCNCW046XAWZZ J AM Socket,22PinCN451 QCNCW862PAFZZ J AG Socket,14PinCN601 QCNCW862LAFZZ J AF Socket,11PinCNA01 QCNCW047GAWZZ J AF Socket,7Pin

1 F841 QFS-L401AAFNZ J AE Square Tip Type Fuse,0.4A,DC60VJ701 VHLGP1FD202-1 J AT Jack,Optical/LineJ702 QJAKM0018AWZZ J AG Jack,Mic InJ703 QJAKM0015AWZZ J AL Jack,Remote Control/EarphonesM901 RMOTV0031AWZZ J AW Motor [Spindle]M902 RMOTS0002AWZZ J AT Motor [Sled]M903 RMOTV0033AWZZ J AW Motor [Lift]SW401 QSW-M0010AWZZ J AE Switch,Key Type [Eject]SW901 QSW-M0008AWZZ J AF Switch,Push Type [Disc Protect]SWA01 QSW-K0237AFZZ J AC Switch,Key Type [Record]SWA02 QSW-K0237AFZZ J AC Switch,Key Type [Play]SWA03 QSW-K0237AFZZ J AC Switch,Key Type [Bass]SWA04 QSW-K0237AFZZ J AC Switch,Key Type [Edit]SWA05 QSW-K0237AFZZ J AC Switch,Key Type [Display]SWA06 QSW-K0237AFZZ J AC Switch,Key Type [Volume -]SWA07 QSW-K0237AFZZ J AC Switch,Key Type [Volume +]SWA08 QSW-K0237AFZZ J AC Switch,Key Type [Stop]SWA09 QSW-K0237AFZZ J AC Switch,Key Type [Mode]SWA10 QSW-K0237AFZZ J AC Switch,Key Type [Fast Reverse]SWA11 QSW-K0237AFZZ J AC Switch,Key Type [Fast Forward]SWA12 QSW-K0237AFZZ J AC Switch,Key Type [Enter]SWA13 QSW-M0009AWZZ J AE Switch,Push Type [Open/Close]

MD MECHANISM PARTS

1 NGERH0125AWZZ J AB Wheel,Drive2 NSFTD0007AWZZ J AL Screw,Drive

3 RCILH0003AWM1 J AT Magnetic Head Ass’y1 4 RCTRH8210AFZZ J BM Optical Pickup

5 QPWBH0010AWZZ J AH Mechanism Flexible PWB6 LHLDX3008AWM2 J AM Cartridge Holder Ass’y7 MLEVF0058AWFW J AD Lift Lever9 MSPRT0041AWFJ J AB Spring,Eject Lever10 LANGK0211AWZZ J AC Bracket,Cancel11 LCHSM0107AWM1 J AL Main Chassis Ass’y12 MSPRP0044AWFJ J AB Spring,Thrust Plate13 MLEVF0056AWFW J AC Lift Connection Lever14 MLEVF0057AWFW J AC Lift Working Lever15 NGERH0096AWZZ J AC Gear,Drive16 MSPRP0043AWFJ J AB Spring,Grip17 NBRGC0004AWZZ J AB Metal501 LX-BZ0049AWZZ J AB Screw,ø1.4×1.8mm502 LX-BZ0050AWZZ J AB Screw,ø1.4×2.5mm503 LX-BZ0051AWZZ J AB Screw,ø1.4×3.8mm504 LX-BZ0823AFZZ J AA Screw,ø1.4×1.2mm505 LX-JZ0027AWZZ J AA Screw,ø1.7×3.5mm506 LX-JZ0167AFZZ J AB Screw,ø1.4×3.0mm507 LX-WZ9290AFZZ J AA Washer,ø0.8×ø2.4×0.25mm508 LX-WZ9296AFZZ J AA Washer,ø1.5×ø3.5×0.25mmM901 RMOTV0031AWZZ J AW Motor [Spindle]M902 RMOTS0002AWZZ J AT Motor [Sled]M903 RMOTV0033AWZZ J AW Motor [Lift]

CABINET PARTS

201 GCABA3008AWM1 J BA Top Cabinet Ass’y202 GCABB3010AWM1 J AU Bottom Cabinet Ass’y

[MD-MT877 (S)]202 GCABB3013AWM1 J Bottom Cabinet Ass’y

[MD-MT877C (S)]203 GCABA1213AWSA J AM Center Cabinet204 GFTAB1029AWSA J AE Cover,Battery205 HDECQ0649AWSA J AL Decoration Plate207 PSHEZ0095AWZZ J AE Sheet,Button208 GMADI0007AWSA J AC LED Window A209 GMADI0008AWSA J AC LED Window B210 GMADI0009AWSA J AC LED Window C212 LANGT0072AWFW J AB Bracket,Center Cabinet213 JKNBZ0757AWSA J AQ Button,Operation A214 JKNBZ0758AWSA J AK Button,Operation B215 HDECQ0650AWSA J AF Decoration Plate216 LHLDZ1291AWZZ J AF Holder,LCD217 RUNTZ0025AWZZ J BB LCD Ass’y218 JKNBK0081AWSA J AE Knob,Eject219 LHLDZ3017AWM2 J AQ Main Frame Ass’y220 LANGZ0031AWM2 J AG Battery Terminal,+221 LHLDZ1282AWZZ J AF Holder,Battery223 GCOVH1021AWZZ J AB Cover,Extension Terminal B224 GCOVH1020AWZZ J AB Cover,Extension Terminal A225 QTANB9028AWFQ J AC Extension Terminal,A226 QTANB9032AWFQ J AG Battery Terminal,-227 PSHEZ0085AWZZ J AC Sheet,Insulation228 LANGT0080AWFW J AC Bracket,Lock229 GCOVH1023AWSA J AB Cover,Charging Stand230 PSHEZ0098AWZZ J AB Sheet,Flexible PWB Protection231 PSHET0046AWZZ J AD Sheet,PWB232 PSPAZ0031AWZZ J AB Spacer,PWB B233 PCUSG0068AWZZ J AB Cushion,Terminal234 QTANB9029AWFQ J AC Charging Stand Terminal235 PSHEZ0105AWZZ J AA Sheet,Main Frame236 PSPAZ0028AWZZ J AA Spacer,PWB A237 PSPAZ0027AWZZ J AB Spacer,Main Frame238 PSHET0052AWZZ J AC Sheet,Button Guide239 PSHET0053AWZZ J AA Sheet,Button240 PSHET0059AWZZ J AA Sheet,Open/Close Button241 PCUSG0078AWZZ J Cushion,Bracket242 PSHET0060AWZZ J Sheet,Button601 LX-BZ0047AWFC J AB Screw,ø1.4×1.5mm602 LX-BZ0048AWFN J AC Screw,ø1.4×2.5mm603 LX-BZ1008AFFC J AB Screw,ø1.4×2mm604 LX-BZ0800AFZZ J AA Screw,ø1.4×2.5mm

PACKING PARTS (MD-MT877 (S) Except for U.S.A./MD-MT877C (S) for Canada)

SPAKA0284AWZZ J AE Packing Add.SPAKC1155AWZZ J Packing Case [MD-MT877 (S)]SPAKC1229AWZZ J Packing Case [MD-MT877C (S)]

– 3 –

NO. PRICERANK DESCRIPTIONPARTS CODENO. PARTS CODE PRICE

RANK DESCRIPTION

MD-MT877/MD-MT877C

SPAKZ0630AWZZ J Pad,AC AdaptorSPAKZ0692AWZZ J AB Sheet,BubbleSSAKA0009AWZZ J AA Polyethylene Bag,Battery Charger

ACCESSORIES

GCASZ0002AWSA J AL Battery CaseQCNWG0029AWZZ J Connecting Cord,RCA Type

(From Serial No.105×××××)QCNWG0382AFZZ J AK Connecting Cord,RCA Type

(To Serial No.104×××××)QCNWG0422AFZZ J AQ Connecting Cord,Optical Type

1 RADPA3048AWZZ J AW AC AdaptorRPHOH0176AFSA J AT EarphonesRRMCW0011AWSA J BK Remote Control

(To Serial No.102×××××)RRMCW0012AWSA J Remote Control

(From Serial No.103×××××)RUNTZ0032AWM1 J BL Battery ChargerTINSK0115AWZZ J AH Operation Manual

[MD-MT877C (S)]TINSZ0639AWZZ J AE Operation Manual [MD-MT877 (S)]TINSZ0640AWZZ J AC Quick Guide [MD-MT877 (S)]TLABZ0695AWZZ J AA Label,Caution (Battery Case)UBAGC0005AWZZ J AD Battery Carrying CaseUBAGC0006AWSA J AH Carrying CaseUBATM0006AWSA J AY Battery

P.W.B. ASSEMBLY (Not Replacement Item)

PWB-A 92LPWB3664MDSS J — MainPWB-B 92LPWB3532KEYS J — LCD/Key

OTHER SERVICE PARTS

UDSKM0001AFZZ J AZ Recording Mini Disc88GMMD-110 J BV High Reflection Disc MMD-110

(TEAC Test MD)88GMMD-213A J BT Low Reflection Disc MMD-213A

(TEAC Test MD)

BATTEY CHARGER PARTS

22 RUNTZ0032AWM1 J BL Battery Charger22- 1 GCABA1223AW01 J Front Cabinet22- 2 ———— — Back Cabinet Unit

(Not Replacement Unit)22- 3 LHLDZ1283AWSA J AE Remote Control Stand22- 4 LHLDZ1285AWSA J AF Stand22- 5 GLEGG0002AWZZ J AB Cushion A22- 6 GLEGG0003AWZZ J AB Cushion B22- 7 XEBSN20P05000 J AA Screw,ø2×5mm22- 8 TLABM0107AWZZ J Label,Specifications22- 9 TLABZ0855AWZZ J Label,Caution

– 4 –

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1 2 3 4 5 6Figure 5 MD MECHANISM EXPLODED VIEW

– 5 –

5

3 10

4

2

1

17

6

9

7

M901

12

15

M902

M903

11

501

16

501x2

502

506x3

504x2

505 503

507

14

508

13

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1 2 3 4 5 6

Figure 6 CABINET EXPLODED VIEW– 6 –

OPENOPEN

OPENOPEN

LCD PWB

MD MECHANISM

223x2

224x2

225x4MAIN PWB

603x2

603x2

212x3

604x4

603x2

205

201

207

210209

208

212212

214

215216

217

231

230

203218

219

220

221204

601

226

602 227

601

235237

236

232

601 603603

603

228

229

236202

233234

213

239x3

240

603

238

241

242

MD-MT877/MD-MT877C

A

B

C

D

E

F

G

H

1 2 3 4 5 6

– 7 –Figure 7 BATTERY CHARGER EXPLODED VIEW

22-1

22-5x2

22-4

22-3

22-6

22-5x2

22-2

22-7

22-7

22

22-9

22-8

MD-MT877/MD-MT877C

PACKING OF THE SET (MD-MT877(S) FOR U.S.A. ONLY)

Setting position of switches and knobs

Remote Control HOLD CANCEL

– 8 –

Operation Manual

Carrying Case

Earphones

Battery Case

AC Adaptor

Packing CaseSPAKC1155AWZZ

Connecting Cord, RCA Type

Battery

Battery Carrying Case

RemoteControl

Label, Caution

Battey Charger

AC Adaptor PadSPAKZ0630AWZZ

Sheet, BubbleSPAKZ0692AWZZ

Packing Add.SPAKA0284AWZZ

Quick Guide

Connecting Cord, Optical Type

Polyethylene Bag, Battey ChargerSSAKA0009AWZZ

:Not Replacement Item

— M E M O —

MD-MT877/MD-MT877C

– 9 –

— M E M O —

MD-MT877/MD-MT877C

– 10 –

MD-MT877/MD-MT877C

COPYRIGHT 2001 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

No part of this publication may be reproduced,stored in a retrieval system, or transmitted inany form or by any means, electronic, mechanical,photocopying, recording, or otherwise, withoutprior written permission of the publisher.

A0103-1267DS•HA•MSC • LAG • SL

SHARP CORPORATIONCommunication Systems GroupQuality & Reliability Control CenterHigashihiroshima, Hiroshima 739-0192, Japan

Printed in Japan

©

md-mt877/md-mt877c service manual - minidisc

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