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VEHICLE
DESTINATION
PRODUCED AFTER
TOYOTA PART No.
ID No.
PIONEER MODEL No.
LEXUS RX300
U.S.A. , CANADA
February 1998
86120-48050
P1714
KEX-M9086ZT/UC
LEXUS RX300
U.S.A. , CANADA
February 1998
86120-48050
P1714
KEX-M9086ZT-91/UC
ORDER NO.
CRT2088
Service
Manual
PUB. NO.
CRT2088
AUDIO SYSTEM
HEAD UNIT
Manufactured for TOYOTA
by PIONEER ELECTRONIC CORPORATION
RX300


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KEX-M9086ZT,M9086ZT-91
CONTENTS
1. SAFETY INFORMATION ............................................3
2. EXPLODED VIEWS AND PARTS LIST .......................4
3. SCHEMATIC DIAGRAM .............................................8
4. PCB CONNECTION DIAGRAM ................................18
5. ELECTRICAL PARTS LIST ........................................26
6. ADJUSTMENT..........................................................32
7. GENERAL INFORMATION .......................................35
7.1 IC ........................................................................35
7.2 DIAGNOSIS .......................................................38
7.2.1 DIAGNOSIS MODE .................................38
7.2.2 DISASSEMBLY ........................................42
7.2.3 CONNECTOR FUNCTION DESCRIPTION ..43
7.3 EXPLANATION..................................................44
7.3.1 BLOCK DIAGRAM ...................................44
7.3.2 SYSTEM BLOCK DIAGRAM ...................45
8. OPERATIONS AND SPECIFICATIONS.....................46
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
- See the separate manual CX-529 (CRT1507) for the cassette mechanism description.
- The cassette mechanism employed in this model is one of 2L mechanism description.
- KEX-M9086ZT/UC has adopted AVC-LAN.
KEX-M9086ZT/UC, KEX-M9086ZT-91/UC
ID No. P1714
NOTE:
- The KEX-M9086ZT-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 KEX-M9086ZT/UC and KEX-M9086ZT-
91/UC.
- Supplementally model is identical to the original except for the addition of following items.
Description
Part No.
Carton
CHA1721
Contain Box
CHD1721
Cover
CEG1045
Polyethylene Bag
CEG-162


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KEX-M9086ZT,M9086ZT-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.


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KEX-M9086ZT,M9086ZT-91
Fig. 1
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR


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KEX-M9086ZT,M9086ZT-91
- EXTERIOR SECTION PARTS LIST
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.
Mark No. Description
Part No.
1 Screw
BMZ26P050FMC
2 Screw
BMZ30P060FMC
3 Case
CNB2187
*
4 Earth
CNC6739
5 Spacer
CNM4305
6 Insulator
CNM5314
7 Main Unit
CWM5423
8 Transistor(Q813)
2SB1185
9 Screw
CBA1393
10 Connector(CN801)
CKM1222
11 Connector(CN802)
CKM1238
12 Connector(CN702)
CKS1730
13 Antenna Jack(CN501)
CKX1057
14 Antenna Jack(CN502)
CKX1058
15 Holder
CNC2218
16 Holder
CNC7149
17 Tuner Unit
CWE1455
18 Holder
CNC6774
19 Chassis Unit
CXB1408
20 Cassette Mechanism ModuleEXK3240
21 Screw
IMS30P050FMC
22 Nonwoven Fabric
CNM5798