pioneer m-la21 sm

8/10/2019 Pioneer M-la21 Sm

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ORDER NO

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, JapanPIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, BelgiumPIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2000c

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

M-LA21

RRV2393

T IZK OCT. 2000 Printed in Japa

STEREO POWER AMPLIFIER

1. SAFETY INFORMATION ....................................... 2

2. EXPLODED VIEWS AND PARTS LIST ................. 3

3. SCHEMATIC DIAGRAM .......................................... 6

4. PCB CONNECTION DIAGRAM ........................... 12

5. PCB PARTS LIST ................................................ 18

6. ADJUSTMENT..................................................... 19

CONTENTS7. GENERAL INFORMATION ................................ 2

7.1 DIAGNOSIS .................................................. 2

7.1.1 SINGLE OPERATION METHOD ......... 2

7.1.2 DISASSEMBLY .................................... 2

8. PANEL FACILITIES AND SPECIFICATIONS .... 23

LA21STEREO POWERAMPLIFIER

DINAMICOFF_ON

DYNAMIC MODE

HIGHEFFICIENTAMPLIFIER

POWEROUTPUT

Component Model Service manual Remarks

COMPACT MINI COMPONENT X-LA21 RRV2370

STEREO CD TUNER XC-LA21 RRV2392

STEREO POWER AMPLIFIER M-LA21 RRV2393 This manual.

SPEAKER SYSTEM S-LA21 RRV2394

System component Table

This product is a system(s) component.This product does not function properly independently ; to avoid malfunctions, besure to connect it to the prescribed system component(s), otherwise damage may

result. Please connect it to the STEREO CD TUNER XC-LA21, for operation inspection.

TypeModel

Power RequirementThe voltage can be converted by

M-LA21 the following method.

DBDXCN AC110-127V / 220-230V / 240V With the Voltage Selector

DDXCN/AR AC110-127V / 220-230V / 240V With the Voltage Selector


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M-LA21

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians ; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trainedto properly and safely repair complex products such as those covered by this manual.Improperly performed repairs can adversely affect the safety and reliability of the product and may

void the warranty. If you are not qualified to perform the repair of this product properly and safely, youshould not risk trying to do so and refer the repair to a qualified service technician.

WARNING

This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause

cancer, birth defects or other reproductive harm.

Health & Safety Code Section 25249.6 Proposition 65

NOTICE(FOR CANADIAN MODEL ONLY)Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts mustbe of identical designation.

REMARQUE(POUR MODLE CANADIEN SEULEMENT)Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les picesde remplacement doivent avoir la mme dsignation.

ANY MEASUREMENTS NOT WITHIN THE LIMITS

OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL

SHOCK HAZARD AND MUST BE CORRECTED BEFORE

RETURNING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the appliancehave special safety related characteristics. These areoften not evident from visual inspection nor the protectionafforded by them necessarily can be obtained by usingreplacement components rated for voltage, wattage, etc.Replacement parts which have these special safetycharacteristics are identified in this Service Manual. Electrical components having such features are identifiedby marking with a on the schematics and on the parts listin this Service Manual.The use of a substitute replacement component which doesnot have the same safety characteristics as the PIONEER

recommended replacement one, shown in the parts list inthis Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and newinstructions are issued from time to time. For the latestinformation, always consult the current PIONEER ServiceManual. A subscription to, or additional copies of, PIONEERService Manual may be obtained at a nominal charge fromPIONEER.

1. SAFETY PRECAUTIONS The following check should be performed for thecontinued protection of the customer and servicetechnician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground (waterpipe, conduit, etc.) by connecting a leakage current testersuch as Simpson Model 229-2 or equivalent between theearth ground and all exposed metal parts of the appliance(input/output terminals, screwheads, metal overlays, controlshaft, etc.). Plug the AC line cord of the appliance directlyinto a 120V AC 60Hz outlet and turn the AC power switchon. Any current measured must not exceed 0.5mA.

(FOR USA MODEL ONLY)

Leakagecurrenttester

Reading shouldnot be above0.5mADevice

undertest

Test allexposed metalsurfaces

Also test withplug reversed(Using AC adapterplug as required)

Earthground

AC Leakage Test


3/26

M-LA21

2. EXPLODED VIEWS AND PARTS LISTNOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.

The mark found on some component parts indicates the importance of the safety factor of the part.Therefore, when replacing, be sure to use parts of identical designation.

Screws adjacent to mark on the product are used for disassembly.

2.1 PACKING (X-LA21)

SYSTEMSPEAKER

REARXC-LA21

REARM-LA21

R

O

T

FRONT

R

O

T

FRONT

TOP SI ETOP SIDE

13

3

1

5

14

7

411

17

15

161920DDXCN/AR Only

9(2/2)

10

10

9(1/2)

8(2/2)

12

8(1/2)1818

11

8(2/2)

12

128(1/2)

6

2

(1) PACKING PARTS LIST

Mark No. Description Part No.

1 AM Loop Antenna ANT-PMT1E-AL2 Remote Control Unit AXD72893 RCA Audio Cable 122003220100

NSP 4 AAA Size R03 Batteries 1301150040005 FM Wire Antenna 132030001001

6 Power-cord Plug Conversion Adaptor

1380117220007 Battery Door 500RC46030708 Polyform Unit 800PMT1900019 Polyfoam (Speaker) 800PMT390000

10 Poly Foam Sheet (C) SP 801999000002

11 Polythenefoam Sheet 801999000005NSP 12 PE Polybag (AC Cord) 805032115000NSP 13 PE Polybag (Remocon) 805035105000NSP 14 PE Polybag (Antenna) 805070100000NSP 15 PE Polybag (I Book) 805085140000

16 Operating Instructions 811PMT391011(English/Spanish/Chinese)

17 Carton See Contrast table (218 Corrugate Card 81500140521319 Additional Sheet 810PMT395010

20 Correction Sheet See Contrast table (2

(2) CONTRAST TABLE

X-LA21/DBDXCN and DDXCN/AR are constructed the same except for the following :

Part No.

Mark No. Symbol and Description X-LA21 X-LA21 Remarks

/DBDXCN /DDXCN/AR17 Carton 813PMT393020 813PMT39301020 Correction Sheet Not used 810PMT395020


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M-LA21

22 15

18

2

51

163 29

49

42

49

53

52

52

47

48

52

52

53

20

53

50

53

5353 52

53

31

53

53

53

34

28

7

5 6

52

53

10

54

54

53

53

50

12

19

45

13

43

1

32

33(3)

49

40

9

4

53

53

53

53 53

53

53

53

52

52

30

53

35

17

14

25

36

26

38

37

36

39

55

56

DDXCN/AROnly

DDXCN/AROnly

57

44

464452

27

BC

C

E

G

BD

D

A

F

F

H

G

A

E

H

11

23

24

21

D

B

C

A

FE

G

DBDXCN

Only

2.2 EXTERIOR SECTION


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M-LA21

1 AMP Assy PMT1LA100011 2 TRANSFORMER Assy PMT1LA100031 3 PRIMARY Assy PMT1LA100041

4 JACK Assy PMT1LA1000215 POWER METER Assy PMT1LA100081

6 LED Assy PMT1LA100051 7 HP JACK Assy PMT1LA100111

8 NSP 9 PROTECTION PCB PMT1LA100141

10 S-Assy PMT3 FP01 SUBPMT3AMFP

11 Meter Assy SUBPMT3MTRNSP 12 Heat Sink Board 033PMT1LS100

13 DC Cord 122006020060 14 Transformer (TR701) 1236C0250140 15 Fuse 124010020001

(F322, F323 : T1AL/250V)

16 Fuse 124025020001(F328, F329 : T2.5A/250V)

17 Fuse (F321 : T3.15A/250V) 124031520003 18 Fuse 124063020001

(F324-F327 : T6.3AL/250V)

19 AC Cord See Contrast table (2)20 Back Cover See Contrast table (2)21 Diffuser Lens 500PMT30900022 Top Panel 500PMT31100123 Meter Holder 505PMT307000

24 Lens Holder 505PMT30800025 Rectifier PCB Bracket 505PMT37000026 PCB Bracket-R 505PMT37200027 Mounting Bracket 50526642200028 Power Knob 510PMT312001

(1) EXTERIOR SECTION PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

29 Voltage Selector Knob 510PMT31900030 Side Panel-L 600PMT11700231 Side Panel-R 600PMT118002

NSP 32 Bottom Tray 600PMT30200033 Copper Post 603PMT381000

34 Power Switch Bracket 605PMT31300035 Transformer Bracket 605PMT31700036 Mounting Bracket-1 605PMT37300037 Mounting Bracket-2 605PMT37400038 Mounting Bracket-3 605PMT375000

39 Mounting Bracket-4 605PMT37600040 41 Heat Sink CDG-74 6130CDG7400042 PCB Sheet 650PMT37700043 Bushing 700PMT156000

44 Rubber Foot 700PMT38400045 Strain Relief Bushing 70003602200046 EMC Label See Contrast table (247 Back Label See Contrast table (2

NSP 48 Serial Label 809000009000

49 Screw BBZ30P100FNI50 Screw BBZ30P180FMC51 Screw BBZ40P060FMC52 Screw BPZ30P100FNI53 Screw KBZ30P060FNI

54 Foot Stand 509PMT32900055 Holding PCB PMT1LA-100-12156 Caution Label See Contrast table (257 AC Cord Label See Contrast table (2

(2) CONTRAST TABLE

M-LA21/DBDXCN and DDXCN/AR are constructed the same except for the following :

Part No.

Mark No. Symbol and Description M-LA21 M-LA21 Remarks

/DBDXCN /DDXCN/AR19 AC Cord 134250220000 13422012001620 Back Cover 500PMT303000 500PMT38800046 EMC Label 809PMT394030 Not used47 Back Label 809PMT396040 809PMT39606056 Caution Label Not used 809PMT394070

57 AC Cord Label Not used 809PMT394100


6/26

M-LA21

6

1 2 3 4

1 2 3 4

POWER METER ASSY(PMT1LA100081)

E

JACK ASSY(PMT1LA100021)D

AMP ASSY(PMT1LA100011)

AIC601

STK411-230POWER AMPLIFIER

RL601PLY-DPDTL

R

SPEAKEROUT

18 14

IC504BA4558N

FromXC-LA21

3(PH)

(PH)

(PH)

4

4

4 4

4 4

7

7

5 7

3. SCHEMATIC DIAGRAM3.1 OVERALL WIRING DIAGRAM


7/26

M-LA215 6 7 8

5 6 7 8

TRANSFORMERASSY(PMT1LA100031)

B

PRIMAY ASSY(PMT1LA100041)

CAC IN

PHONES

HP JACK ASSY(PMT1LA100111)

G

LED ASSY(PMT1LA100051)

F : AUDIO SIGNAL ROUTE

(PH)

(PH)

FromXC-LA21

3

: AUDIO SIGNAL ROUTE (PHONES)(PH)

D311

Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".


8/26

M-LA21

8

1 2 3 4

1 2 3 4

AMP ASSY (PMT1LA100011)

010-550411-000A

A

CN602136-08PMT3-200J

CN22D

MTZJ6.2A

MTZJ6.2A

018-030036-300A

018-030036-300A

2/2

1/2

BA4558DX

BA4558DX

011-020602-001A

011-025401-000A

NJM78M12FA

NJM79M12FA

006-033200-80D

006-033200-63D

004-022410-100

004-022410-100

003-030840-050

003-030840-050

3.2 AMP, TRANSFORMER and PRIMARY ASSYS

A


9/26

M-LA215 6 7 8

5 6 7 8

PRIMARY ASSY (PMT1LA100041)C

TRANSFORMER ASSY(PMT1LA100031)B

WH601136-05PMT3-350J

WH1025-230041-000A

CN604136-07PMT3-202J

WH602

136-04PMT3-350J

CN1135-PHS060-060J

CN8

CN603136-06PMT3-200J

CN4D

C N 2 3

D

AC IN

2/2

1/2

BA4558DX

BA4558DX

011-025401-000A

011-020005-000A

011-020005-000A

011-020005-000A

011

-020005-000A011-020602-001A

011-024001-000A

BZ605MTZJ3.0A

BZ604MTZJ3.0A

010-024001-000A

128-1221125-000

Q617DTA114YS

008-801144-000A

Q610 DTA114YS008-801144-000A

D311011-024001-000A

006-033200-63D

006-033200-80D

: AUDIO SIGNAL ROUTE (L ch)

: AUDIO SIGNAL ROUTE (PHONES)HP

HP

HP

HP

NOTE FOR FUSE REPLACEMENT

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.REPLACE WITH SAME TYPE AND RATINGS ONLY.

CAUTION -

124063020001

124010020001

124031520003

124025020001

1240250200011236C0250140

025-230041-000A

122006020060

AC CORD124250220000

137-400001-000J

NEUTRAL

LIVE

135-PHS020-020J

128-090109-000A

CBA


10/26

M-LA21

10

1 2 3 4

1 2 3 4

CN23

JK501118-000134-003J

J

K502

118-020202-0001J

JACK ASSY (PMT1LA100021)D

WH602

A

AUDIOIN

L

R

IC504BA4558DX

IC502BA4558DX

1/2

MTZJ9.1C

MTZJ12B

135-053259-040J

004-033210-100

004-056210-100

004-056210-100

3.3 JACK, POWER METER, LED and HP JACK ASSYS

D


11/26

M-LA21

1

5 6 7 8

5 6 7 8

CN11136-11PMT3-200JC

N2

135-PHS110-110J

CN22

135-PHS080-080J

CN3

135-PHS070-070J

CN4

135-PHS070-070J

CN13

050-060060-200J

CN16135-030060-200J

CN17

CN12136-17PMT3-200J

CN20135-053259-040J

JK503116-008020-000

110-033162-003A

110-033040-013A

POWER METER ASSY(PMT1LA100081)

E

HP JACK ASSY(PMT1LA100111)

G

LED ASSY(PMT1LA100051)

F

CN602A

CN604

A

IC502BA4558DX

2/2

: AUDIO SIGNAL ROUTE (L ch)

: AUDIO SIGNAL ROUTE (PHONES)HP

HPHPHPHP

HP

HP

HP

HP JACK ASSY

SW501 : DYNAMIC

021-022322-000A

GFED


12/26

M-LA21

12

1 2 3 4

1 2 3 4

E

E

E

Z2

Z1

WH601

Q617

P3

R670

D607

D609

D608

D610

CN603

EC633

IC60

5

W603

W607

W606

P2

W601

W602

W605

W604 EC622E

C623

R305

EC621

IC604

EC625

EC626

EC620

EC624D612

D611

C618

C619

ORN

BLU

BLK

WHT

RED

WHT

YEL

ORN

RED

BRN

BLK

PWRCTL

CTLGND

MUTE

16VAC2

GND

16VAC1

ACVH2

ACVL2

ACGND

ACVL1

ACVH1

NOTE FOR PCB DIAGRAMS : Part numbers in PCB diagrams match those in the schematic diagrams.

The parts mounted on this PCB include all necessary parts for several destinations. For further information for respective destinations, be sure to check with the schematic diagram. View point of PCB diagrams.

CapacitorConnector

P.C.Board Chip Part

SIDE A

SIDE B

Q617

AMP ASSYA

WH1B

CN1B

SIDE A

A

4. PCB CONNECTION DIAGRAM

4.1 AMP ASSY


13/26

M-LA21

1

5 6 7 8

5 6 7 8

E

E

E

E

E

EE

E

EE E E

E

E

EE

CN604

EC608

C637

C636

D

Z605

D

Z604

Z1

BLK

BLK.

R681

D61

6

WH602

P3

W612

W640

D615

D614

Q616

R672R671

R669

W639

W638

W637

Q615

W630

C602

C630

C631

C601

C606

CN602

D613

R622

W613

EC630EC631

W633

W628

R659

W

614

W625

EC617

R667

D606

R646

R649

R647

R648

W618W

616

W611

W626

Q606

EC616

EC619

Q604

R654

R652

EC615

Q605

R639

W602

W619W

617

P1

W610

W627

W634

W629

W635

R661

R625

C622

W624R618

R620

EC614

D601

DZ603

Q603

Q602

Q601

R623

R626

R644

R635

R663

R628R624 R

627R631

R630

R633

R637

R645

R632

R634

R636

R638

R642

R643

R640

R641

EC610

EC611

EC607

EC609

C607

C610

C609

C608

EC612

EC613

C611

C612

IC603

IC602

W609

L601

L602

W620

W621

W622

W623

R602

R601

DZ602

DZ601

R609

R608

EC626

EC620

EC624

IC601

R657

C634

C633

R653

R651

R662

R656

Q613

Q611

Q614

Q612

Q610

R629

R604

R664

R650

EC601

R603

EC602

R605

C603

C604R615

D602

R610

R607

R612R617

R606

EC606

R611

EC605

R613

C635

R658R

668

R621

EC618

R665

Q607

RL601

R616

Q608

EC603

R619

EC604

R614

Q609

D604

PMT1LA-01-01 AMP BOARD

"BOND"

WHT

WHT

RED

BLK

BLK

ORN

WHT

WHT

WHT

WHT

REDPWRCTL

AGND

L+R SIG

SPKR

GND

GND

SPKL

-12V

+12V

GND

HPRCH

HPGND

HPLCH

SPKCTL

AGND

RIN

AGND

LIN

CTL GND

Q617

IC603

IC602Q603

Q602 Q601 IC601Q609Q616Q610

Q607 Q615 Q604Q606 Q605

Q611 Q613 Q614 Q612Q608

CN23D CN4D

CN22D

A


14/26

M-LA21

14

1 2 3 4

1 2 3 4

CN9

CN8

PWRCTL

GND.

PWR

J2

F329

J1

F328

N L

SW301

C321

RL301

R308

C316

C315

L301

F321

D311

"BOND"

BRN

BLU

YEL

ORN

RED

BLK

F321

F328F329

LN

PRIMARY BOARD

PMT1LA-01-04

PRIMARY

DANGER

MUTE

CTLGND

PRIMARY ASSYC

AC IN

NEUTRAL

LIVE

SIDE A

C

4.2 TRANSFORMER and PRIMARY ASSYS


15/26

M-LA21

1

5 6 7 8

5 6 7 8

CN10

WH1

CN1

PT1

BRN

BLU

YEL

ORN

RED

BLK

F326

F327

F325

F324

F323

F322

ORN

BLU

BLK

WHT

RED

BLK

PWRCTL

GND

TRANSFORMER BOARD

PRIMARY DANGER

GND

16VAC1

16VAC2

MUTE

ACVH2

ACVL2

ACGND

ACVL1

ACVH1

PMT1LA-01-03

TRANSFORMER ASSYB

CN603A

WH601A

SIDE A

B


16/26

M-LA21

16

1 2 3 4

1 2 3 4

MSSOP36-P-450-0.A

R577

R589

CN4

J564

J563

D511

C558

R581

R591

R520

EC541

R576

Q512

EC562

EC561

CN22

CN23

CN3

CN2

W1

J54

J83

J82

R575

Q513

J81

R555

J80

J78

J74

EC560

EC559

J71

EC546

Z2

Z1

J68

J67

C557

C556

R506

Q518

C549

R505 R

504

R503

Q517

C548

R502

R501

R507

Q516

C547

R599

R598

Q515R597

R596

R594

R593

DZ506 EC549

R592

Q514

R570

R569

J61

J59

C546

EC548EC537 R561

EC531 R560J52

J40

J39

J29

C545

C544

R588

R587

R586

R585

R584

JK502

JK501

C531

R580

R579

R572

R571

EC534

EC533

R567

C543

C541

C539

R590

R558

IC504

R557

C535

R529

EC530

C533

R530

C532

R554

R553

R552

R550

R551

R549

C530

C529

C528

R548

R547

C524

R542

R534

R533

R532

R545

C523

C520

C519

C518

C517

C516 R

521

R523

R522

C525

R518

IC512

Q501

Q511

Q503

Q502Q504

D510

D506

DZ504

D509

DZ505

EC520

EC518

EC515

EC517

EC513 EC512

EC511

EC521

EC528

EC527

EC526

EC525

EC524

EC523

EC522

EC545

EC535

EC544

EC532

EC529

EC536

EC514

IC502

"BOND"

"BOND"

"BOND"

"BOND"

PWRCTL

AGND

JACK BOARD

FOR NON-KARAOKETO EC522

TO EC523

RCHOUT

AGND

AGND

-12V

AGND

+12V

HPSWHPRCH

HPGNDHPLCH

+12V

-12V

+12V

ECHOSIG1

ECHOSIG2

LIN

RIN

GND

MICIN

MICSW

VOLGND

PMT1LA-01-02

MICGNDMICSIG1

MICSIG2

-6dB SW

METER

METERINGND

HPRCH

HPGNDHPLCH

HPSW

LCHOUT

GND

GND

SPKR

SPKL

Q511Q515

Q518Q517

Q513Q512

Q501 Q502Q503Q504

IC502IC504

IC512Q516 Q514

JACK ASSYD

CN12E

WH602A

CN604A

CN11E CN602A

SIDE A

D

4.3 JACK ASSY


17/26

M-LA21

1

1 2 3 4

1 2 3 4

MMETERW6

CN12

CN13

CN11

CN15CN14

W2

W1

W5

W3

W4

CN16

R574

R573

CN17

LED501

LED503

LED502

EC556

EC557

C551

R565

EC555

R564

R568

EC558

W554

W552CN20

JK504

CN19IC506

JK503

SW501

PMT1LA-01-11

PMT1LA-01-05

PMT1LA-01-0

8

ECHOS1

+12V

ECHOS2

VOLGND

MICS2

-12V

MICS1

MICSW

-12V

MIC

+12V

MICGND

+12V

DYNAMIC

HPLch

HPGND

HPRch

HPSW

HPSW

DYNAMIC

+12V

HP SW

+12V

DYNAMIC

MICS1

-12V

ECHOS2

+12V

+12V

DYNAMIC

+12v

GND

MIC

ECHOS1

MICS2

MIC SW

MIC GND

MIC

LED GND

METER

VOLGND

HP Rch

HP GND

HP Lch

PMT1LA-01-11

PMT1LA-01-0

5

PMT1

LA-01-0

8

MICSW

MICGND

MIC

HPRCH

HPLCH

HPGND

DYNA

+12v

GND

-12V

HP JACK ASSYG

LED ASSYF

POWERMETERASSY

E

CN3D

CN2D

SIDE A

GFE

4.4 POWER METER, LED and HP JACK ASSYS


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5. PCB PARTS LISTNOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.

The mark found on some component parts indicates the importance of the safety factor of the part.Therefore, when replacing, be sure to use parts of identical designation.

When ordering resistors, first convert resistance values into code form as shown in the following examples.Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%).

560 56 101 561 ........................................................ RD1/4PU 5 6 1 J47k 47 103 473 ........................................................ RD1/4PU 4 7 3 J0.5 R50 .....................................................................................RN2H R 5 0 K1 1R0 .....................................................................................RS1P 1 R 0 K

Ex.2 When there are 3 effective digits (such as in high precision metal film resistors).5.62k 562 101 5621 ...................................................... RN1/4PC 5 6 2 1 F

LIST OF ASSEMBLIESAMP ASSY PMT1LA100011

TRANSFORMER ASSY PMT1LA100031 PRIMARY ASSY PMT1LA100041

JACK SSY PMT1LA100021

POWER METER AASSY PMT1LA100081LED ASSY PMT1LA100051 HP JACK ASSY PMT1LA100111

AMP ASSY

SEMICONDUCTORS IC601 (STK411-230) 010-550411-000A

IC602,IC603 BA4558DX IC604 NJM78M12FA IC605 NJM79M12FA

Q601,Q602 2SK246

Q603 DTA124ESQ605-Q608,Q616 2SC1815Q611-Q614 2SD1468SQ604,Q609,Q615 2SA1015Q610,Q617 (DTA114YS) 008-801144-000A

D602,D616 1N4148 D604,D606 (RECTIFIER IN-4001B) 011-024001-000A D607-D610 (RECTIFIER J-05) 011-020005-000A D611,D612 (BRIDGE RECTIFIER) 011-020602-001A

D614,D615 (RECTIFIER IN-5401BL) 011-025401-000A

BZ604,BZ605 MTZJ3.0ADZ601,DZ602 MTZJ6.2A

COILSL601,L602 (3H) 018-030036-300A

RELAYRL601 (12V OSA-SS-212DM5) 128-122125-000A

CAPACITORSC603,C604,C633,C634 004-022410-100(MYLAR CAP 0.22 uF/100V)C606,C635 CKCYB471K50C607,C610 CKCYB682K50C608,C609,C611,C612 CCCCH100D50

C618,C619 CKCYB103K50C630,C631 CKCYB102K50C636,C637 CKCYB101K50C601,C602 CCCCH030D50EC607-EC609,EC618 CEAT1R0M50

EC615,EC630,EC631 CEAT2R2M2AEC603,EC604 CEAT2R2M50EC619 CEAT100M50EC601,EC602 CEAT101M2AEC621,EC633 CEAT101M25

EC616 CEAT221M16EC617 CEAT331M10EC620,EC624 (ELECT3300F/63V) 006-033200-63DEC625,EC626 (ELECT3300F/80V) 006-033200-80DEC605,EC606,EC610-EC614 CEAT470M16

EC622,EC623 CEAT471M25

RESISTORSR603,R605 RS2LMF101J

R608,R609,R615,R616 RS1LMF4R7JR652,R654 RS3LMFR22JR664,R665 RS1LMF681JOther Resistors RD1/4PU J

OTHERSCN602 HSG PMT3-8A JST PHR- 136-08PMT3-200JCN604 HSG PMT3-7C JST PHR- 136-07PMT3-202JWH602 HSG MOLEX 51067-0400 136-04PMT3-350JWH601 HSG MOLEX 51067-0500 136-05PMT3-350JCN603 HSG PMT3-6A JST PHR- 136-06PMT3-200J

JP WIRE AWG22 80MM B 051-275080-009J JP WIRE AWG26 80MM B 051-675080-009J

ROUND PIN 137-500001-000J

TRANSFORMER ASSY

OTHERSCN1 HEADER CTL 6 PINS 135-PHS060-060JWH1 HEADER MOLEX 5 PINS 135-053258-050J

FUSE HOLDER 7900,HT 550-790000-000J

A

B


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PRIMARY ASSY

SEMICONDUCTOR D311 (RECTIFIER IN-4001B) 011-024001-000A

RELAY SWITCH RL301 (RELAY 9 OSA-SS-212DM) 128-090109-000A

SW301 (SLIDE SW VOLT.SELECTOR) 025-230041-000A

CAPACITORS C315,C321 (CERAMIC CAP 0.01F) 003-010320-250A

OTHERSCN8 HEADER CTL 2 PINS 135-PHS020-020J

JP WIRE AWG22 BROWN 054-010150-010JJP WIRE AWG22 ORANGE 054-010150-030JJP WIRE AWG22 BLUE 054-010150-050JJP WIRE AWG22 RED 054-010150-061J

JP WIRE AWG22 BLACK 054-010150-093JJP WIRE AWG22 YELLOW 054-010150-100JAC CONTACT TERMINAL 137-400001-000JFUSE HOLDER 7900,HT 550-790000-000J

JACK ASSY

SEMICONDUCTORSIC502,IC504 BA4558DXQ502,Q515 DTA124ESQ501,Q503,Q513 DTC124ESQ504 2SA1015Q511 DTC114ES

Q512 2SC1815Q516-Q518 2SK246D506,D509,D510,D511 1N4148DZ504 MTZJ9.0C

DZ505 MTZJ12B

CAPACITORSC541,C543 CKCYB101K50C539,C546 CKCYF103Z50C547,C548 (MYLAR CAP 5600pF) 004-056210-100C549 (MYLAR CAP 3300pF) 004-033210-100C556,C557 CKCYB102K50

C533,C558 CGCYF104Z25EC544,EC545 CEJQ2R2M50EC532,EC548 CEJQ101M16EC535,EC536 CEJQ220M16EC561,EC562 CEJQ470M16

EC531,EC533,EC534,EC537 CEJQ100M16

EC546,EC559,EC560 CEJQ100M16EC529,EC530,EC541 CEJQ1R0M50

RESISTORSAll Resistors RD1/4PU J

OTHERSCN3,CN4 HEADER CTL 7 PINS 135-PHS070-070JCN22 HEADER CTL 8 PINS 135-PHS080-080JCN2 HEADER CTL 11 PINS 135-PHS110-110JJK501 PUSH TERMINAL BOARD 118-000134-003JJK502 PIN JACK BOARD 118-020202-001J

JP WIRE AWG26 50MM R 051-675050-006JJP WIRE AWG26 50MM B 051-675050-009J

CN23 HEDER MOLEX 4PINS 53 135-053259-040J

POWER METER ASSY

OTHERSCN11 HSG PMT3-11A JST 136-11PMT3-200JCN12 HSG PMT3-7A JST 136-07PMT3-200JCN13 CONN PIN 6 PINS 050-060060-200JCN16 CONN PIN 3 PINS 050-030060-200J

LED ASSY

SEMICONDUCTORSLED502,LED503 (LED-R-3MM&-S-STP)110-033040-013ALED501 (LED-BL-3MM&-S-&&&) 110-033162-003A

RESISTORS

All Resistors RD1/4PU J

HP JACK ASSY

SWITCHSW501 (PUSH BOTTON SWICH 2P2T) 021-022322-000A

OTHERSJK503 HEADPHONE JACK ST 116-008020-000

D

C

6. ADJUSTMENTThere is no information to be shown in this chapter.

E

F

G


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7. GENERAL INFORMATION

7.1.1 SINGLE OPERATION METHOD

7.1 DIAGNOSIS

CN9

CN8

PWRCTL

GND.

PWR

J2

F329

J1

F328

N L

SW301

C321

RL301

R308

C316

C315

L301

F321

D311

"BOND"

BRN

BLU

YEL

ORN

RED

BLK

F321

F328F329

LN

PRIMARY BOARD

PMT1LA-01-04

PRIMARY

DANGER

MUTE

CTLGND

PRIMARY ASSYC

DC power supply

DC+9V

GND

Please supply +9V from DC power supply to the following point.


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Unhook 2

Side Panel R

Slide the Side Panel Rtoward the rear, thenremove it.

Side Panel L(Remove it as Side Panel R in the same way.)

MountingBracket

Mounting Bracket-4

Remove a Strain

Relief.

Remove it ofR side in thesame way.

Disconnect aConnector (CN8).

Front Panel

Unhook

Unhook

Top Panel

7.1.2 DISASSEMBLY

21

2121

210

210

412

413

10

15

16

13

14

13

11

210

210

24

26

21

28

282

3 79

5

5

5


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Transformer Bracket18

Diagnosis19

17

17

JACK Assy

AMP Assy

LED Assy

POWER METER Assy

HP JACK Assy

TRANSFORMER Assy

PRIMARY Assy

F

E

G

B

C

A

D


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8.1 PANEL FACILITIES

8. PANEL FACILITIES AND SPECIFICATIONS

Front Panel

1 PHONES socket Plug in a pair of headphonesfor private listening.

2 DYNAMIC MODE indicator Lights when theDYNAMICis switched on.

LA21STEREO POWER AMPLIFIER

DINAMIC

OFF _ON

DYNAMIC MODE

HIGH EFFICIENT

AMPLIFIER

POWER OUTPUT

2

3

4

1

3 POWER OUTPUT meter Shows the output leveof the currently selected source.

4 DYNAMIC Switch on for extra power in the bassand a richer treble.


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8.2 SPECIFICATIONS

Power Section & Miscellaneous

Power Requirements

............................ AC 110-127/220-230/240 V (switchable),50/60 Hz

Power Consumption (ON mode) (Total including XC-LA21) ........................... 538 WPower Consumption (Standby mode) ............................ 1 W

Dimensions

Stereo power amplifier ......... 160(W) x 176(H) x 315(D) mm

Weight

Stereo power amplifier ................................................5.1 kg

NOTE: Specifications and design subject to possiblemodification without notice, due to improvements.


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M-LA21

1. CONTRAST OF MISCELLANEOUS PARTSParts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.The mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

Screws adjacent to mark on product are used for disassembly.Reference Nos. indicate the pages and Nos. in the service manual for the base model.

NOTES:

CONTRAST TABLE

Part No.

Ref. No. Mark Symbol and Description M-LA21 M-LA21 Remarks

/DBDXCN /DDX1BR

PACKING (X-LA21) SECTIONP3-8(1/2) Polyform Unit (Rear) 800PMT190001 BR00LA004P3-8(2/2) Polyform Unit (Front) 800PMT190001 BR00LA003P3-9(1/2) Polyfoam (Speaker) (Top) 800PMT390001 BR00LA005P3-9(2/2) Polyfoam (Speaker) (Bottom) 800PMT390001 BR00LA006

P3-10 Poly Foam Sheet (C) SP 801999000002 801999000005

P3-11 Polythene foam Sheet 801999000005 801999000005P3-16 Operating Instructions (English/Spanish/Chinese) 811PMT391011 BR811PMT391011P3-17 Carton 813PMT393020 BR813PMT393020P3-18 Corrugate Card 815001405213 BR815001405213

NSP Warranty Card Not used BR0090001

NSP Service Station List Not used BR0080001

EXTERIOR SECTIONP5-20 Back Cover 500PMT303000 500PMT386000P5-46 EMC Label 809PMT394030 Not usedP5-47 Back Label 809PMT396040 809PMT396010P5-48 NSP Serial Label 809000009000 BR00LA0001P5-56 Caution Label Not used 809PMT394020

M-LA21/DBDXCN and DDX1BR are constructed the same except for the following :

pioneer m-la21 sm

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