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Service
Manual ORDER NO.
CRT2226


GS300
AUDIO SYSTEM
HEAD UNIT

VEHICLE DESTINATION PRODUCED AFTER ID No. TOYOTA PART No. PIONEER MODEL No.
LEXUS GS300 AUSTRALIA August 1998 P2722 86120-3A561 KEX-M8176ZT-02/AU
KEX-M8176ZT-92/AU




- This additional service manual is designed to be used together with Model KEX-M8176ZT/AU Service
Manual CRT2055. Refer to it for finding parts numbers and adjustment,etc. which are not shown in
this manual.




Manufactured for TOYOTA
by PIONEER ELECTRONIC CORPORATION PUB. NO. CRT2226
1 2 3 4
KEX-M8176ZT-02,M8176ZT-92




SCHEMATIC DIAGRAM
A 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 F
TUNER CONTROL PCB KEYBOARD UNIT




B ANTI-THEFT
MOTHER
PCB
DECK UNIT




RESET


C

Large size
A-a A-b
SCH diagram




AVC-LAN
A-a A-b Guide page



TUNER MUTE MIX-AM
UNBAL-B
Detailed page
A-a A-b




D




2
1
AF 2 3 4
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




A




A-b F
LCD UNIT


LCD LAMP
ILL DRIVE DRIVE 8V REGULATOR

B




ANT
8V REGULATOR
SET MUTE

C




5V REGULATOR




IX-AMP ANALOG SWITCH
BAL-BAL



D




AF 3
5 6 7 8
B
A




D
C




4
A-a A-b




1
1




A-a F
TUNER CONTROL PCB KEYBOARD UNIT




2
2
KEX-M8176ZT-02,M8176ZT-92




ANTI-THEFT
MOTHER




3
3




PCB




4
4




DECK UNIT
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




UNBA




A-a A-b
RESE




MIX
A




TUNER MUTE
B
AVC-LAN




C




D




A-a F 5
5 6 7 8
B
A




D
C




6
A-a A-b




1
1




A-b F
LCD UNIT




2
2




LCD LAMP
ILL DRIVE DRIVE 8V REGULATOR
KEX-M8176ZT-02,M8176ZT-92




3
3




4
4




ANT
8V REGULATOR
8V REGULATOR
ESET MUTE




5
5




5V REGULATOR




6
6




MIX-AMP ANALOG SWITCH
NBAL-BAL




7
7




8
A-b F
8




A-a A-b
KEX-M8176ZT-02,M8176ZT-92




7
A




B




D
C
1 2 3 4
KEX-M8176ZT-02,M8176ZT-92




PCB CONNECTION DIAGRAM
A MOTHER PCB AF MOTHER PCB
NOTE FOR PCB DIAGRAMS I CN652,CN653
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.



2. Viewpoint of PCB diagrams

Connector Capacitor

B SIDE A



P.C.Board Chip Part SIDE B




C




D



C CN1004



8 AF 3 4
1 2
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




SIDE A A




B




D CN251




C




D




C CN1003



AF 9
5 6 7 8
1 2 3 4
KEX-M8176ZT-02,M8176ZT-92




AF MOTHER PCB
A




B




C




D




10 AF
1 2 3 4
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




SIDE B
A




B




C




D




AF 11
5 6 7 8
1 2 3 4
KEX-M8176ZT-02,M8176ZT-92




A
TUNER CONTROL PCB




I F TUNER CONTROL PCB




B




C




D A CN401




12
1
I F 2 3 4
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




A




SIDE A




B




C




B
D
TUNER UNIT




5 6 7
I F 8
13
1 2 3 4
KEX-M8176ZT-02,M8176ZT-92




A




I F TUNER CONTROL PCB




B




C




D




14
1
I F 2 3 4
5 6 7 8
KEX-M8176ZT-02,M8176ZT-92




A




SIDE B




B




C




D




5 6 7
I F
8
15
KEX-M8176ZT-02,M8176ZT-92




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

Description Part No.
KEX-M8176ZT-92/AU
Polyethylene Bag CEG1026
Carton CHA2025
Contain Box CHD2025
Protector CHP1972,CHP1973




EXPLODED VIEWS AND PARTS LIST
EXTERIOR(Page 4)
- EXTERIOR SECTION PARTS LIST

Part No.
Mark No. Description KEX-M8176ZT/AU KEX-M8176ZT-02/AU
5 Main Unit CWM4937 CWM6045
46 LCD Unit CWM4932 CWM6165
53 Keyboard Unit CWM5116 CWM6160
62 Grille Unit CXB2403 CXB3205
63 Door CAT1811 CAT2001




ELECTRICAL PARTS LIST(Page 38)
Main Unit
Part No.
Symbol and Description KEX-M8176ZT/AU KEX-M8176ZT-02/AU
Q962 Not used 2SA1162
D941 MA8043(H) HZU4R3(B3)
D954 Not used UDZ10(B)
R518 Not used RS1/16S821J
R519 Not used RS1/16S151J

R968 Not used RS1/10S123J
R969,970,971 Not used RS1/10S103J
R974 Not used RS1/8S472J
R999 RS1/10S0R0J Not used
C505,506 CCSQCH101J50 CCSRCH101J50




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-ZZU.JULY 1998 Printed in Japan