GM-8086ZT
ORDER NO.
CRT2120
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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
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