Pioneer Lexus RX300 User manual

HEAD UNIT
ORDER NO.
CRT2394
PUB. NO. CRT2394
AUDIO SYSTEM
Manufactured for TOYOTA
by PIONEER CORPORATION
RX300
Service
Manual
VEHICLE DESTINATION PRODUCED AFTER ID No. TOYOTA PART No. PIONEER MODEL No.
LEXUS RX300 TAIWAN August 1999 P1714 86120-48060 KEX-M9296ZT/ES
KEX-M9296ZT-91/ES

KEX-M9296ZT,M9296ZT-91
PIONEER 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. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 1999 K-ZZY. JULY 1999 Printed in Japan
-This additional service manual is designed to be used together with Model KEX-M9086ZT/UC and KEX-
M9086ZT-91/UC Service Manual CRT2088. Refer to it for finding parts numbers and adjustment,etc.
which are not shown in this manual.
-Supplementary model is identical to the original except for the addition of following items.
Description Part No.
KEX-M9296ZT-91/ES
Polyethylene Bag CEG-162
Carton CHA1721
Contain Box CHL3839
Cover CEG1045
EXPLODED VIEWS AND PARTS LIST
EXTERIOR(Page 4)
- EXTERIOR SECTION PARTS LIST
Part No.
Mark No. Description KEX-M9086ZT/UC KEX-M9296ZT/ES
7 Main Unit CWM5423 CWM6920
ELECTRICAL PARTS LIST(Page 26)
Main Unit Part No.
Symbol and Description KEX-M9086ZT/UC KEX-M9296ZT/ES
IC701 PD4846C PE5112A

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
Se r v i c e
M a nu a l
PUB. NO. CRT2088
AUDIO SYSTEM
HEAD UNIT
Manufactured for TOYOTA
by PIONEER ELECTRONIC CORPORATION
RX300

2
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

3
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.

4
KEX-M9086ZT,M9086ZT-91
Fig. 1
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR

5
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

6
KEX-M9086ZT,M9086ZT-91
Fig. 2
2.2 CASSETTE MECHANISM MODULE

7
KEX-M9086ZT,M9086ZT-91
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBF1038
4 Washer CBG1003
5 Deck Unit EWM1008
6 Screw(M2×5) EBA1028
7 Screw(M2×2.5) EBA1037
8 Spring EBH1531
9 Spring EBH1589
10 Cushion ENM1034
11 Spring EBH1515
12 Spring EBH1587
13 Spring EBH1517
14 Spring EBH1547
15 Spring EBH1519
16 Spring EBH1537
17 Cord EDD1015
18 Photo-Reflector(EGN2, 3) EGN1004
19 Photo-Interrupter(EGN1) EGN1005
20 Roller ENR1031
21 Shaft ELA1362
22 Roller ELA1348
23 Arm ENC1416
24 Arm ENC1397
25 Guide ENC1398
26 Holder ENC1417
27 Lever ENC1449
28 Arm ENC1401
29 Roller ENR1027
30 Belt ENT1027
31 Gear ENV1347
32 Collar ENV1508
33 Gear ENV1350
34 Flywheel ENV1410
35 Worm Gear ENV1439
36 Worm Wheel ENV1440
37 Gear ENR1028
38 Lever ENV1455
39 Arm ENV1445
40 Gathering PCB ENX1029
41 Gathering PCB ENX1041
42 Switch(S1) ESG1004
43 Motor Unit(M2) EXA1485
44 Chassis Unit EXA1494
45 Pinch Roller Unit EXA1472
46 Pinch Roller Unit EXA1473
47 Reel Unit EXA1484
48 Head Base Unit EXA1434
49 Lever Unit EXA1438
50 Gear Unit EXA1436
51 Frame Unit EXA1476
52 Lever Unit EXA1425
53 Head Assy(HD1) EXA1481
54 Motor Unit(M1) EXA1497
55 Washer HBF-179
56 Screw BMZ20P022FMC
57 Resistor(R1) RD1/4HM181J
58 Washer YE20FUC
59 Connector(CN251) CKS1711
60 Connector(CN252) CKS2127
61 Connector(CN253) CKS2129
62 •••••
63 Spring EBH1545
64 Switch(S2) ESG1004
65 Roller ENR1023
66 Cover ENC1412
67 Cover ENC1413
68 Spring EBH1546
69 Washer EBE1008
70 Washer YE15FUC
71 Lever Unit EXA1424
72 Spring EBL1026
73 Screw(M2×2) CBA1250
74 Capacitor(C1) CEA4R7M35LS2
75 Bracket ENC1472
76 Inductor(L1) ETH0001
77 Cushion ENM1036
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM MODULE SECTION PARTS LIST

8
KEX-M9086ZT,M9086ZT-91
A
1234
B
C
D
1234
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".
AMAIN UNIT TUNER UNIT
B
A-a
A
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page

9
KEX-M9086ZT,M9086ZT-91
5678
A
B
C
D
5678
Fig. 3
A-b
A
DECK UNIT
C
PCB UNIT
REEL PCB D
E
PD4846B

10
KEX-M9086ZT,M9086ZT-91
A
1234
B
C
D
1234
AMAIN UNIT TUNER UNIT
B
A-a A-b
A-a

11
KEX-M9086ZT,M9086ZT-91
5678
A
B
C
D
5678
A-a A-b
Fig. 4
A-a

12
KEX-M9086ZT,M9086ZT-91
A
1234
B
C
D
1234
A-a A-b
A-b

13
KEX-M9086ZT,M9086ZT-91
5678
A
B
C
D
5678
DECK UNIT
C
PCB UNIT
REEL PCB D
E
PD4846B
A-a A-b
Fig. 5
A-b

14
KEX-M9086ZT,M9086ZT-91
A
1234
B
C
D
1234
B
B
3.2 TUNER UNIT

15
KEX-M9086ZT,M9086ZT-91
5678
A
B
C
D
5678
I
B
Fig. 6
A

16
KEX-M9086ZT,M9086ZT-91
A
1234
B
C
D
1234
3.3 CASSETTE MECHANISM MODULE
C
A
D
C
CN702

17
KEX-M9086ZT,M9086ZT-91
5678
A
B
C
D
5678
E
F
E
D
C
Fig. 7
D
E