1

MICROFILM

Model Name Using Similar Mechanism CDX-4180R

CD Drive Mechanism Type MG-363X-121

Optical Pick-up Name KSS-521A

SERVICE MANUAL AEP ModelUK Model

CDX-4270R

FM/MW/LW COMPACT DISC PLAYER

CD player sectionSystem Compact disc digital audio

systemSignal-to-noise ratio 90 dBFrequency response 10 – 20,000 HzWow and flutter Below measurable limit

Tuner sectionFMTuning range 87.5 – 108.0 MHzAerial terminal External aerial connectorIntermediate frequency 10.7 MHzUsable sensitivity 12 dBfSelectivity 75 dB at 400 kHzSignal-to-noise ratio 65 dB (stereo),

68 dB (mono)Harmonic distortion at 1 kHz

0.8% (stereo),0.6% (mono)

Separation 35 dB at 1 kHzFrequency response 30 – 15,000 Hz

MW/LWTuning range MW: 531 – 1,602 kHz

LW: 153 – 281 kHzAerial terminal External aerial connectorIntermediate frequency 10.7 MHz / 450 kHzSensitivity MW: 30 µV

LW: 50 µV

SPECIFICATIONS

Power amplifier sectionOutputs Speaker outputs

(sure seal connectors)Speaker impedance 4 – 8 ohmsMaximum power output 40 W × 4 (at 4 ohms)

GeneralOutputs Line output (1)

Power aerial relay controlleadPower amplifier controlleadTelephone ATT controllead

Tone controls Bass ±8 dB at 100 HzTreble ±8 dB at 10 kHz

Power requirements 12 V DC car battery(negative ground)

Dimensions Approx. 178 × 50 × 185 mm(w/h/d)

Mounting dimension Approx. 182 × 53 × 162 mm(w/h/d)

Mass Approx. 1.2 kgSupplied accessories Parts for installation and

connections (1 set)Front panel case (1)

Design and specifications are subject to change withoutnotice.

20

4-1. IC PIN DESCRIPTION• IC801 MB90574APMT-G-212-BND (SYSTEM CONTROL)

Pin No. Pin Name I/O Pin Description

1 LD ON O Laser ON/OFF control output

2 FOK I Focus OK signal detection input

3 XLAT25 O CD signal processing latch output

4 DATA25 O CD signal serial data output

5 XRST O Reset output to CD signal processor IC.

6 GFS I GFS signal detection input

7 NIL — Not used. (Connect to ground in this set.)

8 VCC — Power supply pin (+5 V)

9 – 11 NIL — Not used. (Open)

12 FLS SI/NOSE1 I Front panel attachment detection input

13 LCD SO/FLS SO O LCD serial data output

14 LCD CKO O LCD serial clock output

15 BEEP O BEEP output

16 NIL — Not used. (Open)

17 SQ SI I Sub Q data input

18 NIL — Not used. (Connect to ground in this set.)

19 SQ CKO O Sub Q read clock output

20 UNI SI I SONY BUS system serial interface input

21 UNI SO O SONY BUS system serial interface output

22 UNI CK I/O SONY BUS system serial clock input/output

23 C IN I Track jump No. count input

24 SIRCS I Remote commander input

25 TXT SI I CD-TEXT data input (Not used in this set.)

26 NIL — Not used. (Connect to ground in this set.)

27 TXT CKO O CD-TEXT data read clock output (Not used in this set.)

28 CLOK25 O CD signal processing serial clock output

29 SYSRST O System reset output

30 DEEMPH O De-emphasis output

31 AMP ATT O Power amplifier attenuator control output

32 MD ON O CD mechanism power control output

33 VSS — Ground

34 C — Power stabilization capacitor pin

35 CD ON O CD power control output

36 BUS ON O BUS ON control output (Not used in this set.)

37 NIL O Power control output of A/D conversion.

38 DVCC — VREF input of D/A converter.

39 DVSS — Ground of D/A converter.

40 NIL — Not used. (Open)

41 ANGLE O LCD view angle alignment output (Not used in this set.)

42 AVCC — Analog power supply pin (+5 V)

43 AVRH — VREF + input of A/D converter.

44 AVRL — VREF – input of A/D converter.

45 AVSS — Analog ground

46 – 48 KEY IN0 – 2 I Key input 0 – 2

49 RC IN0 I Rotary commander input 0

50 QUALITY I Noise detection input

51 NIL — Not used. (Connect to ground in this set.)

52 MPDH I Tuner multi path input

53 S-METER I S-meter voltage detection input

54 VCC — Power supply pin (+5 V)

55 NS MASK O Noise detection output

SECTION 4DIAGRAMS

21 21

Pin No. Pin Name I/O Pin Description

56 AMP ON O Power amplifier power control output

57 TXT ON O Reset output to CD-TEXT decoder IC. (Not used in this set.)

58 VOL ATT O Electric volume mute control output

59 NIL — Not used. (Open)

60 ATT O System attenuate control output

61 RC IN1 I Rotary commander shift key input 1

62 TU ATT O Tuner attenuate output

63 VSS — Ground

64 NIL — Not used. (Open)

65 SSTOP I IF counter result signal detection input of PLL.

66 TEST I Test mode initial setting detection input

67 DAVN I RDS IC data acquisition detection input

68 FM ON/AM ON O FM ON output

69 TU ON O Tuner power control output

70 SDA I/O I2C BUS serial data input/output

71 SCL O I2C BUS serial clock output

72 NOSE2 I Front panel OPEN detection input

73 X1A O Sub ceramic oscillator output (32 kHz)

74 X0A I Sub ceramic oscillator input (32 kHz)

75 SCOR I SCOR signal detection input

76 BU IN I Backup power detection input

77 DQSY I CD-TEXT data setting completion signal detection input (Not used in this set.)

78 CD SENS I CD SENS signal detection input

79 NIL I Key input acknowledge

80 TEL ATT I Telephone attenuate detection input

81 ST/MONO I/O Tuner stereo signal detection input/forced monaural output

82 SEEKOUT O SEEK output

83 SD IN I Signal detector input

84 WIDE O WIDE select output (Not used in this set.)

85 NARROW O NARROW select output (Not used in this set.)

86 HSTX — Hardware standby input (Connect to pin (º (RESET).)

87 MD2 — Operation mode input (Connect to ground in this set.)

88, 89 MD1, 0 — Operation mode input (Connect to VCC in this set.)

90 RESET I Reset input

91 VSS — Ground

92 X0 I Main ceramic oscillator input (3.68 MHz)

93 X1 O Main ceramic oscillator output (3.68 MHz)

94 VCC — Power supply pin (+5 V)

95 COM8V ON O COM 8V control output

96 NIL — Not used. (Open)

97 AREA1 I Destination select input 1 (Fixed at “H” in this set.)

98 AREA2 IDestination select input 2 (Fixed at “L” (AEP, UK model) or “H” (German model)

in this set.)

99 LOUD I Fixed at “H” in this set.

100 BAND I Fixed at “H” in this set.

101 ACC IN I Accessory power detection input

102, 103 PH3, 2 I Disc insertion detection photo sensor input (Fixed at “H” in this set.)

104 LCD CE O LCD chip enable output

105 FLS W I Flash write input (Fixed at “H” in this set.)

106, 107 RE IN0, 1 I Rotary encoder input

108 ILL ON O Illumination power control output

109 PW ON O System power control output

110 NIL — Not used. (Open)

Pin No. Pin Name I/O Pin Description

111 ANT REM O ANT REMOTE power control output

112 NIL — Not used. (Open)

113 CTL2 — Not used in this set.

114 CD LD O Loading motor control output (Loading direction)

115 CD EJ O Loading motor control output (Eject direction)

116 L SW I Sled limit switch detection input

117 IN SW/(PH1) I Disc insertion detection input

118 D SW I DOWN switch detection input

119 VSS — Ground

120 SELF SW/(IN SW) I Disc self store detection input

27 27

CDX-4270R

4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 25 for Waveforms.

• Refer to page 35 for IC Block Diagrams.

Note:• Voltage and waveforms are dc with respect to ground

under no-signal conditions.no mark : CD PLAY

∗ : Impossible to measure

(Page30)

30 30

TDA7384

CDX-4270R

4-9. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 37 for IC Block Diagrams.

Note:• Voltage is dc with respect to ground under no-signal

(detuned) condition.no mark : FM( ) : MW< > : CD PLAY

(Page 31) (Page 32)

(Pag

e 27

)

31 31

0.056

CDX-4270R

4-10. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 38 for IC Block Diagrams.

Note:• Voltage is dc with respect to ground under no-signal

(detuned) condition.no mark : FM( ) : MW< > : CD PLAY

(Page 30)

(Pag

e 32

)

32 32

CDX-4270R

4-11. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 38 for IC Block Diagrams.

Note:• Voltage is dc with respect to ground under no-signal

(detuned) condition.no mark : FM( ) : MW< > : CD PLAY

(Page 33)

(Page 30)(P

age

31)

33 33

4-12. SCHEMATIC DIAGRAM — DISPLAY SECTION —

Note:• Voltage is dc with respect to ground under no-signal

(detuned) condition.no mark : FM

(Page 32)

CDX-4270R

35

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

OPOU

T

CH4-

IN

CH4

CTL1

CTL2

FWD

REV

TRAY

GND

CH3

–

CH5

–

COM

CH4

+

CH3

+

CH3-

IN

CH3

VREF

CH2

CH2-

IN

VCC

VCC

CH1

–

CH2

–

CH1-

IN

OP IN

–

CH1

CH1

+

OP IN

+

CH2

+

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

DRIVEBUFFER

LEVELSHIFT

LEVELSHIFT

LEVELSHIFT

LEVELSHIFT

THERMALSHUTDOWN

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LOGIC

CTL1 CTL2 FWD REV

V/I

XLON

SPOD

SPOC

SPOB

SPOA

CLKO

VDD

CNIN

SEIN

CLOK

XLAT

XLTO

DATO

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44

DATAXRSTSENSMUTESQCKSQSOEXCKSBSOSCORVSSWFCKEMPH

DOUT

C4MFSTTXTSLXTAOXTAI

MNTO

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LRCK

PCM

DBC

LKGT

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GFXP

CKVD

DGF

SRF

CKC2

POXR

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NT3

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161718

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13

1415

FOK

MONMDPMDS

LOCKTEST

FILOFILIPCOVSS

AVSSCLTVAVDD

RFBIASASYI

ASYOASYE

WDCK

5

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INTERFACESUB CODE

PROCESSOR

DIGITALCLV

EFMDEMODULATOR

DIGITALPLL

ASYMMETRYCORRECTOR

5 D/AINTERFACE

ERRORCORRECTOR

3

6

3

16KRAM

DIGITALOUT

CLOC

KGE

NERA

TOR

4

IC1 CXD2507AQ

IC3 BA6796FP-T1

• IC Block Diagrams

36

36 35 34 33 32 31 30 29 28 27 26 25

24

23

22

21

20

19

18

17

16

15

14

13

121110987654321

37

38

39

40

41

42

43

44

45

46

47

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PHD

2

PHD

1

PHD

LD RF

O

RF I

CP CB CC1

CC2

FOK

SENS

C.OUT

XRST

DATA

XLT

CLK

VCC

ISET

SL O

SL M

SL P

TA O

TA M

FSET

TG2

TGU

SRCH

FE OFLB

FGD

FDFC

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FE MFE

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FE BIAS

F

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VEE

TED

LPFI

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ATSC

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FOK

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RF IV AMP1

RF IV AMP2

FE A

MP

TTL

IIL

FZC COMP

DFCT

IIL

TTL

IIL DATA REGISTER INPUT SHIFT REGISTER

ADDRESS DECODER

OUTPUT DECODER

TTL

IIL

TOG1-3BAL1-3

FS1-4 TG1-2 TM1-7 PS1-4F IV AMP

E IV AMP

BAL1

BAL2

BAL

3

TE AMP

TZC COMP

DFCT

TM1

DFCT

FS4

ATSC

WINDOW COMP

TOG1

TOG2

TOG3

FCS PHASECOMPENSATION

FS1

F SE

TTG2

TM7

TM3

TM4

TM5

TM6

ISETTRACKINGPHASECOMPENSATION

HPF COMP LPF COMP

TG1

FS2

TM2

RF M

IC2 CXA1782BQ

37

SE3LSE3RMUTESDASCLPAUSE

OUT FL

OUT FR

OUT RL

OUT RR

SUBOUT+

SUBOUT–

VDD

GNDCREF

SE1LSE1RMD+MD–

CDL+CDL–CDR–CDR+PDR

PDGNDPDL

SE2LSE2R

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INPUTGAIN

BEEP

LOUDNESSCONTROLCIRCUIT

SOFTMUTE

VOLUMECONTROLCIRCUIT

COMPANDER

TREBLE/BASS

CONTROLCIRCUIT

SUBWOOFEROUT

FADERSUBWOOFERLP

IICBUSDIGITAL CONTROL CIRCUIT

POWERSUPPLY

FRONTFADER

FRONTFADER

REARFADER

REARFADER

VOICE BANDPASS

HP LP

SDA

SCL

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CONTROL

INPUTINTERFACE

DIGITALFILTER

5LEVE DAC

LOWPASS FILTER

CMOSAMP

5LEVEL DAC

LOWPASS FILTER

CMOSAMP

MODECONTROL

XTIDGND

VDD

LRCIN

DIN

BCKIN

ZERO

D/C R

VOUTRAGND VCC

VOUTL

D/C L

MODE

RSTB

MD/DM0

MC/DM1

ML/MUTE

CLKOXTO

NOISE SHAPER

IC401 TDA7462D013TR

IC702 PCM1717E-ST2

38

SWITCHLP1/LP2

PORTEXTENSION

CHARGEPUMP

TESTLOGIC

16 BIT PROGCOUNTER

REFOSCILLATOR

TIMER CONTROLSWITCH

OUT

SUPPLY&

POWER ONRESET

11-21 BIT PROG COUNTER

14 BIT PROGCOUNTER

SWITCHAM/FM

PHASECOMP

INLOCKDETECTOR

11 BIT PROGCOUNTER

SWITCHSWM/DIR

6 BIT PROGCOUNTER

SWITCHSWM/DIR

PRE COUNTER:32/33

I2C BUSINTERFACE

SWITCHAM/FM

VDD11

2

3

4

6

7

8

5

910

11

14

1213

17

18

19

20

21

22

23

24

25

26

27

28

16

15

LP FM

LP HC

LP AM

V REF

LCL/DX

SEEK

NIL

MONO

OSCINOSCOUT

NC

SCLSDA

IF AM

LPOUT

VDD2

GND AM

AM IN

FM IN

NC

GND D

VDD1

ADDR

HFREF

AMOSC

DOUT/INLOCK

SSTOP

IF FM

IC601 TDA7427AD1TR

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109

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3

12

20

18

17161514

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PAUSEDETECTOR

INTERFACEREGISTER

RDS/RDBSDECODER

OSCILLATORAND CLOCK

TESTCONTROL

MULTI-PATHDETECTOR

RDS/RDBSDEMODULATOR

CLOCKEDCOMPARATOR

POWER SUPPLYAND RESET

57kHz8th ORDERBAND-PASS

SIGNALQUALITY

DETECTOR

IIC-BUSSLAVE

TRANSCEIVER

SCLSDA

DAVN VDDD VSSD OSCI OSC0

TCON

MPTH MRO LVIN

CIN SCOUT

VREF MPX

VSSA VDDA

AFIN

MAD PSWN

5

4

4

IC602 SAA6588T-118

REGULATORVREF

+– + –

THERMALSHUTDOWN

OVERVOLTAGEPROTECT

CIRCUIT ON

51 2 3 4AMPON

AMPOUT

GND VCC VDDOUT

ON ON

5.7V

IC901 BA4903ST-V5