Pioneer GM-8086ZT Service Manual

ORDER NO.

CRT2120

Se

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vic

e

M

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nu

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PUB. NO. CRT2120

AUDIO SYSTEM

POWER AMPLIFIER

Manufactured for TOYOTA

by PIONEER ELECTRONIC CORPORATION

LX470

VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
LEXUS LX470 U.S.A. , CANADA January 1998 86280-60160 GM-8086ZT/UC
LEXUS LX470 U.S.A. , CANADA January 1998 86280-60160 GM-8086ZT-91/UC

2

GM-8086ZT,8086ZT-91

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 trained to 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, you should not risk trying to do so
and refer the repair to a qualified service technician.

CONTENTS

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

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

3. SCHEMATIC DIAGRAM .............................................4

4. PCB CONNECTION DIAGRAM ................................10

5. ELECTRICAL PARTS LIST ........................................14

6. ADJUSTMENT..........................................................17

7. GENERAL INFORMATION .......................................18

7.1 IC.........................................................................18

7.2 DIAGNOSIS........................................................19

7.2.1 DISASSEMBLY..........................................19

7.2.2 CONNECTOR FUNCTION DESCRIPTION .......20

7.3 EXPLANATION...................................................20

7.3.1 SYSTEM BLOCK DIAGRAM.....................20

7.3.2 BLOCK DIAGRAM.....................................21

8. OPERATIONS AND SPECIFICATIONS.....................22

- GM-8086ZT/UC has adopted AVC-LAN.

GM-8086ZT/UC, GM-8086ZT-91/UC

NOTE:

- The GM-8086ZT-91/UC is supplementary genuine part for a TOYOTA vehicle, and a Pioneer product for recycling
stock.

- As for the structure and electrical system, there is no difference between the GM-8086ZT/UC and GM-8086ZT-91/UC.

- Supplementally model is identical to the original except for the addition of following items.

Description Part No.
Carton CHG3497
Contain Box CHL3497
Cover CEG1045

3

GM-8086ZT,8086ZT-91

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

1 Screw BMZ30P060FMC
2 Screw BMZ50P080FMC
3 Screw CBA1427
4 Chassis CNA1939
5 Case CNB2298

6 Bracket CNC7181
* 7 Seal CNM5381
* 8 Seal CNM5714
* 9 Heat Sink CNR1482

10 Amp Unit CWM5422

11 Screw BMZ30P060FMC

12 Screw CBA1409
13 Connector(CN954) CKM1124
14 Connector(CN951) CKM1125
15 Connector(CN952) CKM1126
16 Connector(CN953) CKM1127

17 Holder CNC7146
18 Bracket CNC7147
19 Transistor(Q903) 2SD1273
20 IC(IC601) TA8221AH1
21 IC(IC602) TA8221AH1

22 IC(IC603) TA8221AH1

- EXTERIOR SECTION PARTS LIST

Mark No. Description Part No.

Mark No. Description Part No.

Fig. 1

NOTE:

- Parts marked by “*”are generally unavailable because they are not in our Master Spare Parts List.

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

4

GM-8086ZT,8086ZT-91

A

1

234

B

C

D

12

34

3. SCHEMATIC DIAGRAM

3.1 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS

LIST”.

A-a

A

A-a A-b

A-a

A-b

A-b

A-a

Large size

SCH diagram

Guide page

Detailed page

5

GM-8086ZT,8086ZT-91

5

6

7

8

A

B

C

D

5

6

7

8

Fig. 2

A

A-b

A

AMP UNIT

6

GM-8086ZT,8086ZT-91

A

1

234

B

C

D

12

34

A-a

A-a

A-b

7

GM-8086ZT,8086ZT-91

5

6

7

8

A

B

C

D

5

6

7

8

Fig. 3

A-a

A-a

A-b

8

GM-8086ZT,8086ZT-91

A

1

234

B

C

D

1

2

34

A-a

A-b

A-b

A

AMP UNIT

9

GM-8086ZT,8086ZT-91

5

6

7

8

A

B

C

D

5

6

7

8

Fig. 4

A-b

A-a

A-b

10

GM-8086ZT,8086ZT-91

A

1

234

B

C

D

1

2

34

4. PCB CONNECTION DIAGRAM

4.1 AMP UNIT

NOTE FOR PCB DIAGRAMS

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

Capacitor

Connector

P.C.Board

Chip Part

SIDE A

SIDE B

A

2. Viewpoint of PCB diagrams

AMP UNIT

A

17

16

15

14

13

12

11

10987654

321

11

GM-8086ZT,8086ZT-91

5

6

7

8

A

B

C

D

5

6

7

8

Fig. 5

A

SIDE A

11

13

15

17

16

12

14

10987654

321

15

17

16

11

13

12

14

10987654

321

12

GM-8086ZT,8086ZT-91

A

1

234

B

C

D

1

2

34

AMP UNIT

A

A

13

GM-8086ZT,8086ZT-91

5

6

7

8

A

B

C

D

5

6

7

8

SIDE B

Fig. 6

A

Unit Number : CWM5422
Unit Name : Amp Unit

MISCELLANEOUS

IC 401 IC NJM2068MD
IC 402 IC NJM2068MD
IC 403 IC NJM2068MD
IC 404 IC NJM2068MD
IC 501 IC NJM2068MD

IC 502 IC NJM2068MD
IC 503 IC NJM2068MD
IC 504 IC NJM2068MD
IC 551 IC NJM2068MD
IC 552 IC NJM2068MD

IC 601 IC TA8221AH1
IC 602 IC TA8221AH1
IC 603 IC TA8221AH1
IC 801 IC M51957BFP
IC 851 IC NJM2068MD

IC 852 IC NJM2068MD
Q 401 Transistor 2SC4081LN
Q 402 Transistor 2SC4081LN
Q 403 Transistor 2SC4081LN
Q 404 Transistor 2SC4081LN

Q 405 Transistor 2SC4081LN
Q 406 Transistor 2SC4081LN
Q 407 Transistor 2SC4081LN
Q 408 Transistor 2SC4081LN
Q 409 Transistor 2SC4081LN

Q 410 Transistor 2SC4081LN
Q 451 Transistor 2SC4081LN
Q 452 Transistor 2SC4081LN
Q 453 Transistor 2SC4081LN
Q 454 Transistor 2SC4081LN

Q 455 Transistor 2SC4081LN
Q 456 Transistor 2SC4081LN
Q 651 Transistor DTC323TK
Q 652 Transistor DTC323TK
Q 661 Transistor DTC323TK

Q 662 Transistor DTC323TK
Q 671 Transistor DTC323TK
Q 802 Transistor 2SA1586
Q 803 Transistor DTC114EU
Q 804 Transistor 2SA1586

Q 807 Transistor 2SA1586
Q 901 Transistor 2SA1586
Q 902 Transistor 2SC4081
Q 903 Transistor 2SD1273
Q 904 Transistor 2SC4081

Q 951 Transistor 2SA1586
D 801 Diode MA141WK
D 901 Diode 5KP24A
D 902 Diode MA8091(M)
D 903 Diode MA8047(M)

D 904 Diode MA141WK
L 901 Choke Coil 0.3mH CTH1194
FU 901 Fuse 8A CEK1180

RESISTORS

R 401 RS1/10S472J
R 402 RS1/10S472J
R 403 RS1/10S472J
R 404 RS1/10S472J
R 405 RS1/10S562J

R 406 RS1/10S562J
R 407 RS1/10S123J
R 408 RS1/10S123J
R 409 RS1/10S431J
R 410 RS1/10S683J

R 411 RS1/10S132J
R 412 RS1/10S332J
R 413 RS1/10S912J
R 414 RS1/10S683J
R 415 RS1/10S122J

R 416 RS1/10S332J
R 417 RS1/10S912J
R 418 RS1/10S753J
R 419 RS1/10S122J
R 420 RS1/10S332J

R 421 RS1/10S102J
R 422 RS1/10S753J
R 423 RS1/10S132J
R 424 RS1/10S332J
R 425 RS1/10S392J

R 426 RS1/10S683J
R 427 RS1/10S122J
R 428 RS1/10S332J
R 429 RS1/10S431J
R 430 RS1/10S683J

R 431 RS1/10S132J
R 432 RS1/10S332J
R 433 RS1/10S912J
R 434 RS1/10S683J
R 435 RS1/10S122J

R 436 RS1/10S332J
R 437 RS1/10S912J
R 438 RS1/10S753J
R 439 RS1/10S122J
R 440 RS1/10S332J

R 441 RS1/10S101J
R 442 RS1/10S101J
R 443 RS1/10S102J
R 444 RS1/10S753J
R 445 RS1/10S132J

14

GM-8086ZT,8086ZT-91

5. ELECTRICAL PARTS LIST

NOTE:

- Parts whose parts numbers are omitted are subject to being not supplied.

- The part numbers shown below indicate chip components.

Chip Resistor

RS1/_S___J,RS1/__S___J

Chip Capacitor (except for CQS.....)

CKS....., CCS....., CSZS.....

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

A

15

GM-8086ZT,8086ZT-91

R 446 RS1/10S332J
R 447 RS1/10S392J
R 448 RS1/10S683J
R 449 RS1/10S122J
R 450 RS1/10S332J

R 451 RS1/10S472J
R 452 RS1/10S472J
R 453 RS1/10S472J
R 454 RS1/10S472J
R 455 RS1/10S622J

R 456 RS1/10S622J
R 457 RS1/10S103J
R 458 RS1/10S103J
R 459 RS1/10S243J
R 460 RS1/10S683J

R 461 RS1/10S122J
R 462 RS1/10S332J
R 463 RS1/10S0R0J
R 464 RS1/10S753J
R 465 RS1/10S122J

R 466 RS1/10S332J
R 467 RS1/10S302J
R 468 RS1/10S683J
R 469 RS1/10S122J
R 470 RS1/10S332J

R 471 RS1/10S243J
R 472 RS1/10S683J
R 473 RS1/10S122J
R 474 RS1/10S332J
R 475 RS1/10S0R0J

R 476 RS1/10S753J
R 477 RS1/10S122J
R 478 RS1/10S332J
R 479 RS1/10S302J
R 480 RS1/10S683J

R 481 RS1/10S122J
R 482 RS1/10S332J
R 491 RS1/10S101J
R 492 RS1/10S101J
R 501 RS1/10S473J

R 502 RS1/10S473J
R 503 RS1/10S473J
R 504 RS1/10S473J
R 505 RN1/10SE5602D
R 506 RN1/10SE5602D

R 507 RN1/10SE5602D
R 508 RN1/10SE5602D
R 509 RN1/10SE7501D
R 510 RN1/10SE2202D
R 511 RN1/10SE1202D

R 512 RN1/10SE2202D
R 513 RN1/10SE5602D
R 514 RN1/10SE5602D
R 515 RN1/10SE5602D
R 516 RN1/10SE5602D

R 517 RN1/10SE7502D
R 518 RN1/10SE1102D
R 519 RN1/10SE8202D
R 520 RN1/10SE1102D
R 521 RN1/10SE4702D

R 522 RN1/10SE8202D
R 523 RN1/10SE3002D
R 524 RN1/10SE8202D
R 525 RN1/10SE7501D
R 526 RN1/10SE2202D

R 527 RN1/10SE1202D
R 528 RN1/10SE2202D
R 551 RS1/10S223J
R 552 RS1/10S223J
R 553 RS1/10S223J

R 554 RS1/10S223J
R 555 RS1/10S562J
R 556 RS1/10S822J
R 557 RS1/10S472J
R 558 RS1/10S822J

R 559 RS1/10S302J
R 560 RS1/10S513J
R 561 RS1/10S473J
R 562 RS1/10S473J
R 563 RS1/10S513J

R 564 RS1/10S101J
R 601 RS1/8S2R2J
R 602 RS1/8S2R2J
R 603 RS1/8S2R2J
R 604 RS1/8S2R2J

R 605 RS1/10S303J
R 606 RS1/10S303J
R 611 RS1/8S2R2J
R 612 RS1/8S2R2J
R 613 RS1/8S2R2J

R 614 RS1/8S2R2J
R 615 RS1/10S303J
R 616 RS1/10S303J
R 621 RS1/8S2R2J
R 622 RS1/8S2R2J

R 623 RS1/8S2R2J
R 624 RS1/8S2R2J
R 625 RS1/10S272J
R 626 RS1/10S272J
R 651 RS1/10S562J

R 652 RS1/10S562J
R 653 RS1/10S103J
R 654 RS1/10S103J
R 661 RS1/10S152J
R 662 RS1/10S152J

R 663 RS1/10S103J
R 664 RS1/10S103J
R 671 RS1/10S222J
R 672 RS1/10S103J
R 801 RS1/10S332J

R 802 RS1/10S683J
R 803 RS1/10S103J
R 804 RS1/10S103J
R 806 RS1/10S103J
R 807 RS1/10S103J

R 808 RS1/10S472J
R 809 RS1/10S222J
R 810 RS1/4S222J
R 811 RS1/10S103J
R 812 RS1/10S472J

R 821 RS1/10S184J
R 822 RS1/10S303J
R 851 RS1/8S222J
R 852 RS1/8S222J
R 853 RS1/8S222J

R 854 RS1/8S222J
R 855 RS1/10S333J
R 856 RS1/10S333J
R 857 RS1/10S333J
R 858 RS1/10S333J

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

R 859 RS1/10S273J
R 860 RS1/10S273J
R 861 RS1/10S273J
R 862 RS1/10S273J
R 863 RS1/8S222J

R 864 RS1/8S222J
R 865 RS1/8S222J
R 866 RS1/8S222J
R 867 RS1/10S333J
R 868 RS1/10S333J

R 869 RS1/10S333J
R 870 RS1/10S333J
R 871 RS1/10S273J
R 872 RS1/10S273J
R 873 RS1/10S273J

R 874 RS1/10S273J
R 901 RS1/8S153J
R 903 RS1/10S472J
R 904 RS1/10S392J
R 905 RS1/10S392J

R 906 RS1/4S751J
R 907 RS1/10S102J
R 908 RS1/4S1R5J
R 909 RS1/10S102J
R 951 RS1/10S103J

R 952 RS1/8S153J
R 954 RS1/10S472J
R 955 RS1/10S103J
R 957 RS1/10S104J
R 958 RS1/10S104J

R 959 RS1/10S331J

CAPACITORS

C 401 CCSQCH221J50
C 402 CCSQCH221J50
C 403 CKSQYB334K16
C 404 CKSQYB334K16
C 405 CKSQYB334K16

C 406 CKSQYB334K16
C 407 CKSYB684K16
C 408 CKLSR563K16
C 409 CKLSR563K16
C 410 CKLSB183K50

C 411 CKLSQB682K50
C 412 CCSQCH681J50
C 413 CKSQYB124K16
C 414 CKSQYB154K16
C 415 CKLSQB822K50

C 416 CKLSB223K50
C 417 CKSYB684K16
C 418 CKLSR563K16
C 419 CKLSR563K16
C 420 CKLSB183K50

C 421 CKLSQB682K50
C 422 CCSQCH681J50
C 423 CKSQYB124K16
C 424 CKSQYB154K16
C 425 CKLSQB822K50

C 426 CKLSB223K50
C 451 CCSQCH221J50
C 452 CCSQCH221J50
C 453 CKSQYB334K16
C 454 CKSQYB334K16

C 455 CKSQYB334K16
C 456 CKSQYB334K16
C 457 CKSYB123K50
C 458 CKLSB333K50
C 459 CKSYB684K16

C 460 CKLSB183K50
C 461 CKLSB183K50
C 462 CKLSQB822K50
C 463 CKSYB123K50
C 464 CKLSB333K50

C 465 CKSYB684K16
C 466 CKLSB183K50
C 467 CKLSB183K50
C 468 CKLSQB822K50
C 501 CKLSQB272K50

C 502 CKLSQB822K50
C 503 CKLSQB272K50
C 504 CKLSQB822K50
C 505 CKLSR104K16
C 506 CKLSR473K16

C 507 CKLSR104K16
C 508 CKLSR473K16
C 509 CCSQCH680J50
C 510 CCSQCH330J50
C 511 CCSQCH560J50

C 512 CCSQCH330J50
C 551 CKSQYB332K50
C 552 CFTNA564J50
C 553 CFTNA564J50
C 554 CFTNA564J50

C 555 CKLSR563K16
C 556 CKSYB394K16
C 557 CKLSQB272K50
C 601 CEANL4R7M25
C 602 CEANL4R7M25

C 603 CEAS221M16
C 604 CKSQYB102K50
C 605 CKSYB224K16
C 606 CKSYB224K16
C 607 CKSYB224K16

C 608 CKSYB224K16
C 609 CKSQYB102K50
C 610 CEAS331M16
C 611 CEANL4R7M25
C 612 CEANL4R7M25

C 613 CEAS221M16
C 614 CKSQYB102K50
C 615 CKSYB224K16
C 616 CKSYB224K16
C 617 CKSYB224K16

C 618 CKSYB224K16
C 619 CKSQYB102K50
C 620 CEAS331M16
C 621 CEANL4R7M25
C 622 CEANL4R7M25

C 623 CEAS221M16
C 624 CKSQYB102K50
C 625 CKSYB224K16
C 626 CKSYB224K16
C 627 CKSYB224K16

C 628 CKSYB224K16
C 629 CKSQYB102K50
C 630 CEAS331M16
C 651 CEAS100M16
C 652 CEAS100M16

C 653 CEANLR47M50
C 654 CEANLR47M50
C 661 CEAS100M16
C 662 CEAS100M16
C 663 CEANLR47M50

16

GM-8086ZT,8086ZT-91

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

C 664 CEANLR47M50
C 671 CEAS100M16
C 672 CEANLR47M50
C 673 CEANLR47M50
C 801 CEAS1R0M50

C 802 CEAS470M16
C 803 CKSQYB473K50
C 851 CEJANP4R7M16
C 852 CEJANP4R7M16
C 853 CEJANP4R7M16

C 854 CEJANP4R7M16
C 855 CCSQCH270J50
C 856 CCSQCH270J50
C 857 CCSQCH270J50
C 858 CCSQCH270J50

C 859 CEJANP4R7M16
C 860 CEJANP4R7M16
C 861 CEJANP4R7M16
C 862 CEJANP4R7M16
C 863 CCSQCH270J50

C 864 CCSQCH270J50
C 865 CCSQCH270J50
C 866 CCSQCH270J50
C 881 CCSQCH331J50
C 882 CCSQCH331J50

C 883 CCSQCH331J50
C 884 CCSQCH331J50
C 885 CCSQCH331J50
C 886 CCSQCH331J50
C 887 CCSQCH331J50

C 888 CCSQCH331J50
C 901 CEAS472M16
C 902 CKSQYB104K50
C 903 CKSQYB473K50
C 904 470µF/16V CCH1183

C 905 CKSQYB103K50
C 906 CEAS101M10
C 921 CKSQYB473K50
C 922 CKSQYB473K50
C 924 CKSQYB473K50

C 925 CKSQYB473K50
C 926 CKSQYB473K50
C 927 CKSQYB473K50
C 928 CKSQYB473K50
C 929 CKSQYB473K50

C 930 CKSQYB473K50
C 931 CKSQYB473K50
C 933 CKSQYB473K50
C 934 CKSQYB473K50
C 951 CKSQYB473K50

C 952 CKSQYB104K25

17

GM-8086ZT,8086ZT-91

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

6. ADJUSTMENT

There is no information to be shown in this chapter.

18

GM-8086ZT,8086ZT-91

7. GENERAL INFORMATION

7.1 IC

TA8221AH1

19

GM-8086ZT,8086ZT-91

7.2 DIAGNOSIS

7.2.1 DISASSEMBLY

Fig.9

Fig. 7

- Removing the Case(not shown)

1.Remove the three Seals.

2.Remove the Case.

- Removing the Heat Sink(Fig.8)

1.Remove the eight screws A, remove the Heat Sink.

Fig.8

- Removing the Amp Unit(Fig.9)

1.Remove the two screws B.

2.Remove the Amp Unit.

- Cautions on removing the Power Amp IC(Fig.10)

When replacing the Power Amp IC(IC601,IC602,IC603),
open the holder's hooks fixing the IC, and then remove the
ICs.

20

GM-8086ZT,8086ZT-91

7.2.2 CONNECTOR FUNCTION DESCRIPTION

ACC

FL-

SGD2

AGND

RR+

RL-

WF2-

SGD1

FL+

RR-

WF2+

+BO

RL+

GND1

GND2

TLMT

MUTE

ACCO

FL+

FR-

FL-

345

6

91011

12

4

172835

5678

32

1

FR+

FR-

BEEP AMP

WF1-

WF1+

RL+

RR+

RL- RR-

FR+

+B1

+B2

CN954

CN953

CN952

CN951

CN951

CN952CN953

CN954

Fig. 10

7.3 EXPLANATION

7.3.1 SYSTEM BLOCK DIAGRAM

Power Supply(+B, ACC)
Audio Signal

Vehicle

Fig. 11

HEAD UNIT

POWER

AMPLIFIER

MADE BY FUJITSU TEN GM-8086ZT/UC

21

GM-8086ZT,8086ZT-91

7.3.2 BLOCK DIAGRAM

Fig. 12

A

8. OPERATIONS AND SPECIFICATIONS

SPECIFICATIONS

Power source . . . . . . . . . . . . .13.2±0.2V(10.5-16.0V)

Grounding . . . . . . . . . . . . . . . .NEGATIVE TYPE

Dimensions . . . . . . . . . . . . . . .250(W)x45(H)x130(D)

Weight . . . . . . . . . . . . . . . . . . .1.785kg

Maximum output power . . . .Front 20W(1kHz)

Rear 20W(1kHz)
Woofer 20W(70Hz)

GM-8086ZT,8086ZT-91

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS SERVICE INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 501 Orchard Road, #10-00, Wheelock Place, Singapore 238880

C PIONEER ELECTRONIC CORPORATION 1998

K-ZEB. JAN. 1998 Printed in Japan