2
GM-8886ZT,8886ZT-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 ........................................18
6. ADJUSTMENT..........................................................23
7. GENERAL INFORMATION .......................................25
7.1 IC .........................................................................25
7.2 DIAGNOSIS ........................................................28
7.2.1 DISASSEMBLY..........................................28
7.2.2 CONNECTOR FUNCTION DESCRIPTION .......29
7.3 EXPLANATION...................................................30
7.3.1 BLOCK DIAGRAM .....................................30
7.3.2 SYSTEM BLOCK DIAGRAM .....................31
7.3.3 SERVICE MODE FOR DSP AMPLIFIER ....32
8. OPERATIONS AND SPECIFICATIONS.....................34
NOTE:
- The GM-8886ZT-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-8886ZT-91/UC and GM-8886ZT/UC.
- The supplementary model is identical with the original ones except for the following items.
R1A
R3T
TLMT
E
R1H
FL+
RDK
RDH
FL-
RDL
RDJ
RDA
WF+
RDQ
WF-
RDM
RL-
RCZ
RR+
RDP
RL+
RCY
RR-
RDN
SGND
R8G
TXM-
ROY
TXM+
L+
R1L
R+
R1J
L-
R-
R1M
R1K
BUS-
BUS+
RDB
ACC
R1B
MUTE
R1D
CDR+
CDR-
UHY
UHZ
MUTE
R2N
SGD4
2CB
CDL+
UHO
CDL-
UH1
FR-
FR+
BU
GM-8886ZT/UC,
GM-8886ZT-91/UC
Description
Part No.
Cover
CEG1045
Carton
CHA2114
Contain Box
CHD2114