Pioneer GM-8606ZT, GM-8506ZT Service Manual
ORDER NO.
CRT2497
PUB. NO. CRT2497
AUDIO SYSTEM
POWER AMPLIFIER
Manufactured for TOYOTA
by PIONEER CORPORATION
VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
LEXUS GS300,430 USA,EUROPE August 2000 86280-30372 GM-8506ZT/E
GM-8506ZT-91/E
86280-30362 GM-8606ZT/E
GM-8606ZT-91/E
GS300,430
Service
Manual
2
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
GM-8506ZT/E
GM-8606ZT/E
CONTENTS
1. SAFETY INFORMATION............................................2
2. EXPLODED VIEWS AND PARTS LIST ......................3
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....5
4. PCB CONNECTION DIAGRAM................................12
5. ELECTRICAL PARTS LIST........................................20
6. ADJUSTMENT.........................................................25
7. GENERAL INFORMATION.......................................29
7.1 DIAGNOSIS .......................................................29
7.1.1 DISASSEMBLY .........................................29
7.1.2 CONNECTOR FUNCTION DESCRIPTION ......30
7.2 IC ........................................................................31
7.3EXPLANATION...................................................33
7.3.1 OPERATIONAL FLOW CHART .................33
7.3.2 SYSTEM BLOCK DIAGRAM.....................35
7.3.3 SERVICE MODE FOR DSP AMPLIFIER ....36
8. SPECIFICATIONS.....................................................39
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.
NOTE:
- The GM-8506ZT-91/E and GM-8606ZT-91/E are supplementally 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-8506ZT-91/E, GM-8606ZT-91/E and
GM-8506ZT/E, GM-8606ZT/E.
- Supplementally model is identical to the original except for the addition of following items.
Part No.
Description GM-8506ZT-91/E GM-8606ZT-91/E
Cover CEG1045 CEG1045
Air cushioned bag CEG1081 CEG1081
Carton CHG3331 CHG3331
Contain Box CHL4148 CHL4149
1 Screw BMZ30P060FMC
2 Screw BMZ50P060FMC
3 Screw(M3x5) CBA1327
4 Chassis CNA1852
5 Case CNB2102
6 Shield CNC6809
7 Shield CNC6810
8 Bracket CNC6813
9 Bracket CNC6811
10 Insulator CNM5537
11 Heat Sink CNR1432
12 Amp Unit CWM6207
13 DSP Unit CWM7243
14 Screw IMS30P060FMC
15 Screw BMZ30P060FMC
16 Screw(M3x6) CBA1393
17 Bracket CNC6807
18 Holder CNC6808
19 Connector(CN901) CKM1222
20 Connector(CN902) CKM1244
21 Connector(CN903) CKM1245
22 Plug(CN905) CKS3631
23 Plug(CN906) CKS3631
24 IC(IC901) NJM7805FA
25 IC(IC801) TA8221AH1
26 IC(IC821) PAL001A
27 IC(IC851) TA8225H-LF1
28 Socket(CN51) CKS3632
29 Socket(CN52) CKS3632
* 30 Seal CNM5381
3
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR (GM-8506ZT/E)
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.
3
11
27
26
25
24
15
5
1
4
1
18
22
23
12
16
19
20
21
1
17
6
7
1
28
29
13
10
1
14
1
2
9
2
8
30
- EXTERIOR SECTION PARTS LIST
Mark No. Description Part No.
Mark No. Description Part No.
4
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
1 Screw BMZ30P060FMC
2 Screw BMZ50P060FMC
3 Screw(M3x5) CBA1327
4 Chassis CNA1852
5 Case CNB2102
6 Shield CNC6809
7 Shield CNC6810
8 Bracket CNC6813
9 Bracket CNC6812
10 Insulator CNM5537
11 Heat Sink CNR1432
12 Amp Unit CWM6208
13 DSP Unit CWM7245
14 Screw IMS30P060FMC
15 Screw BMZ30P060FMC
16 Screw(M3x6) CBA1393
17 Bracket CNC6807
18 Holder CNC6808
19 Connector(CN901) CKM1222
20 Connector(CN902) CKM1244
21 Connector(CN903) CKM1245
22 Plug(CN905) CKS3631
23 Plug(CN906) CKS3631
24 IC(IC901) NJM7805FA
25 IC(IC801) TA8221AH1
26 IC(IC821) PAL001A
27 IC(IC851) TA8225H-LF1
28 Socket(CN51) CKS3632
29 Socket(CN52) CKS3632
* 30 Seal CNM5381
- EXTERIOR SECTION PARTS LIST
Mark No. Description Part No.
Mark No. Description Part No.
3
11
27
26
25
24
15
5
18
22
23
12
16
19
20
21
1
17
6
7
1
28
29
13
10
1
14
1
8
1
4
1
2
9
2
30
2.2 EXTERIOR (GM-8606ZT/E)
5
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
1
2
3
4
A
B
C
D
1
2
3
4
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
A
B
DSP UNIT
AMP UNIT
6
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
A
1
234
B
C
D
12
34
3.2 SCHEMATIC DIAGRAM
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL
PARTS LIST”.
TAPE: -1.05dBs
CD: +6.95dBs
TUNER(EW): -9.05dBs
TUNER(UC):-14.05dBs
TAPE: -6.85dBs
4.9V
5.0V
4.9V
2.3V
4.9V
4.9V
4.9V
7.9V
7.5V
0.4V
1.0V
4.1V
3.4V
3.0V
3.0V
3.0V
3.0V
3.0V
3.4V
7.8V
7.9V
3.5V
3.5V
3.5V
3.5V
3.5V
3.5V
7.9V
5.0V
2.5V
5.0V
3.8V
3.8V
3.8V
7.9V
A-a A-b
A-a
A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
A
A-a
B
Decimal points for resistor
and capacitor fixed values
are expressed as :
2.2 2R2
0.022 R022
←
←
Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.
NOTE :
Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.
A
DSP UNIT
B
AMP UNIT
TAPE: +0.2dBs
CD: +8.2dBs
TUNER(EW): -7.8dBs
TUNER(UC):-12.8dBs
TAPE: +25.15dBs
TAPE: -10.05dBs
CD: -3.55dBs
TAPE: -12.35dBs
CD: -5.85dBs
13.2V
3.8V
5.0V
3.8V
7.9V
7.6V
1.2V
1.8V
13.1V
13.2V
4.1V
13.2V
0.3mH
12.7V
13.2V
7.9V
3.8V
3.8V
3.8V
3.8V
3.8V
2.5V
2.5V
2.5V
2.5V
3.0V
2.5V
2.5V
4.9V
4.9V
7.9V
2.5V
4.9V
4.3V
4.3V
4.3V
4.3V
4.3V
4.3V
4.9V
2.5V
4.9V
2.5V
4.9V
2.5V
4.9V
4.3V
7.9V
4.3V
4.3V
4.3V
4.3V
7.9V
5.0V
4.9V
4.9V
7
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
5
6
7
8
A
B
C
D
5
6
7
8
A-b
A
B
8
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
A
1
234
B
C
D
12
34
4.9V
5.0V
4.9V
2.3V
4.9V
4.9V
4.9V
7.9V
7.5V
0.4V
1.0V
4.1V
3.4V
3.0V
3.0V
3.0V
3.0V
3.0V
3.4V
7.8V
7.9V
3.5V
3.5V
3.5V
3.5V
3.5V
3.5V
A-a
A-b
A-a
1
2
3
9
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
5
6
7
8
A
B
C
D
5
6
7
8
A-a
A-b
TAPE: -1.05dBs
CD: +6.95dBs
TUNER(EW): -9.05dBs
TUNER(UC):-14.05dBs
TAPE: -6.85dBs
7.9V
3.5V
3.5V
3.5V
3.5V
7.9V
5.0V
2.5V
5.0V
3.8V
3.8V
3.8V
7.9V
A-a
B
4
5
6
7
10
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
A
1
234
B
C
D
12
34
A-a
A-b
A
DSP UNIT
TAPE: -10.05dBs
CD: -3.55dBs
TAPE: -12.35dBs
CD: -5.85dBs
7.9V
3.8V
3.8V
3.8V
3.8V
3.8V
2.5V
2.5V
2.5V
2.5V
3.0V
2.5V
2.5V
4.9V
4.9V
7.9V
2.5V
4.9V
4.3V
4.3V
4.3V
4.3V
4.3V
4.3V
4.9V
2.5V
4.9V
2.5V
4.9V
2.5V
4.9V
4.3V
7.9V
4.3V
4.3V
4.3V
4.3V
7.9V
5.0V
4.9V
4.9V
A-b
1
2
3
Decimal points for resistor
and capacitor fixed values
are expressed as :
2.2 2R2
0.022 R022
←
←
Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.
NOTE :
Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.
B
AMP UNIT
TAPE: +0.2dBs
CD: +8.2dBs
TUNER(EW): -7.8dBs
TUNER(UC):-12.8dBs
TAPE: +25.15dBs
13.2V
3.8V
5.0V
3.8V
7.9V
7.6V
1.2V
1.8V
13.1V
13.2V
4.1V
13.2V
0.3mH
12.7V
13.2V
7.9
3.8
3.8
3.8
3
3.8
2.5
2.5
3.0
4.9
7.9V
11
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
5
6
7
8
A
B
C
D
5
6
7
8
A-a
A-b
A-b
B
4
5
6
7
12
GM-8506ZT,8506ZT-91,8606ZT,8606ZT-91
A
1
234
B
C
D
12
34
4. PCB CONNECTION DIAGRAM
4.1 DSP 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
2. Viewpoint of PCB diagrams
DSP UNIT
CN906
A
A
B
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