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Service
Manual ORDER NO.
CRT2252
ES300
AUDIO SYSTEM
HEAD UNIT
VEHICLE DESTINATION PRODUCED AFTER ID No. TOYOTA PART No. PIONEER MODEL No.
LEXUS ES300 MIDDLE EAST December 1998 P7510 86120-33230 KEX-M8186ZT/ES
KEX-M8186ZT-91/ES
Manufactured for TOYOTA
by PIONEER ELECTRONIC CORPORATION PUB. NO. CRT2252
KEX-M8186ZT,M8186ZT-91
P7510
NOTE:
- The KEX-M8186ZT-91/ES 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-M8186ZT/ES and
KEX-M8186ZT-91/ES.
- Supplementary model is identical to the original except for the addition of following items.
Description Part No.
Polyethylene Bag CEG1026
Carton CHA2025
Contain Box CHD2025
Protector CHP1888,1889
- 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.
CONTENTS
1. SAFETY INFORMATION ............................................3 7. GENERAL INFORMATION .......................................51
2. EXPLODED VIEWS AND PARTS LIST .......................4 7.1 PARTS ................................................................51
3. SCHEMATIC DIAGRAM .............................................8 7.1.1 IC ..............................................................51
4. PCB CONNECTION DIAGRAM ................................24 7.1.2 DISPLAY...................................................53
5. ELECTRICAL PARTS LIST ........................................38 7.2 DIAGNOSIS .......................................................54
6. ADJUSTMENT..........................................................46 7.2.1 DIAGNOSIS MODE .................................54
7.2.2 DISASSEMBLY ........................................58
7.2.3 CONNECTOR FUNCTION DESCRIPTION ..59
7.3 BLOCK DIAGRAM .............................................60
8. OPERATIONS AND SPECIFICATIONS.....................62
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KEX-M8186ZT,M8186ZT-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-M8186ZT,M8186ZT-91
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR
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KEX-M8186ZT,M8186ZT-91
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.
- EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ26P050FMC 46 Knob Unit CXB4043
2 Screw BMZ30P050FMC 47 Spring CBL-108
3 Case CNB1980 48 Grille Unit CXB2863
4 Insulator CNM4472 49 Door CAT1980
5 Spacer CNM4564 50 Spring CBH1371
6 Main Unit CWM6017 51 Plug(CN202) CKS1607
7 Chassis Unit CXB1275 52 Plug(CN201) CKS1615
8 Cassette Mechanism Module EXK3045 53 Holder CNC5060
9 Screw IMS30P050FMC 54 Plug(CN2) CKS1607
10 Spacer CNM5593 55 Plug(CN1) CKS1616
11 Screw BMZ30P060FMC 56 Holder CNC4666
12 Screw CBA1339 57 Holder CNC7007
13 Connector(CN703) CDE4737 58 FM Front End CWB1070
14 Connector(CN852) CKM1074 59 Screw BPZ20P060FMC
15 Plug(CN851) CKM1221 60 LCD CAW1494
16 Connector(CN402) CKS2826 61 Plug(CN903) CKS2706
17 Connector(CN401) CKS2628 62 Holder CNC5182
18 Connector(CN652,653) CKS3008 63 PCB CNP4104
19 Plug(CN701,702) CKS3156 64 Holder CNV4343
20 Antenna Jack(CN651) CKX1024 65 Nut CBN1008
21 Holder CNC2218 66 Connector(CN901,902) CKS2646
22 Holder CNC4981 67 Connector(CN905) CKS2827
23 Holder CNC6057 68 Connector(CN904) CKS2835
24 Holder CNC6058 69 Holder CNC6068
25 MW/SW Unit CWA1077 70 Rubber CNV3649
26 FM Unit CWE1345 71 Rubber CNV3650
27 Screw BPZ26P100FMC 72 Rubber CNV4324
28 Button(TUNE,SEEK) CAC4438 73 IC(IC951) TA8214K
29 Button(EJECT) CAC4583 74 Transistor(Q958,959) 2SB1335A
30 Button(1,2) CAC4736 75 Volume(VR901-905) CCS1119
31 Button(3,4) CAC4737 76 Volume(S901) CCS1106
32 Button(5,6) CAC4738
33 Button(SCAN,P.SCAN) CAC4739
34 Button(AM/SW) CAC5746
35 Button(FM) CAC5747
36 Button(TAPE) CAC4742
37 Button(CD) CAC4743
38 Holder CNV3645
39 Holder CNV3646
40 Holder CNV3647
41 Holder CNV3648
42 LCD Unit CWM6019
43 Keyboard Unit CWM6018
44 Knob Unit CXB4042
45 Spring CBL-108
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KEX-M8186ZT,M8186ZT-91
2.2 CASSETTE MECHANISM MODULE
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KEX-M8186ZT,M8186ZT-91
- CASSETTE MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Pinch Roller Assy EXX1037 46 Gear ENV1423
2 Screw BSZ20P040FMC 47 Collar ENV1508
3 Screw(M2x4) CBA1015 48 Gear ENV1350
4 Washer CBF1037 49 Gear ENV1351
5 Washer CBF1038 50 Gear ENV1354
6 Washer CBG1003 51 Gear ENV1355
7 Pinch Roller Assy EXX1038 52 Gear ENV1357
8 Deck Unit CWM3710 53 Gear ENV1358
9 Spring EBH1458 54 Gear ENV1359
10 Spring EBH1434 55 Clamper ENV1360
11 Spring EBH1435 56 Clamper ENV1361
12 Spring EBH1437 57 Arm ENV1362
13 Spring EBH1464 58 Gear ENV1363
14 Spring EBH1439 59 Flywheel ENV1410
15 Spring EBH1440 60 Head Assy(HD1) EXA1364
16 Spring EBH1441 61 Arm Unit EXA1276
17 Spring EBH1442 62 Arm Unit EXA1277
18 Spring EBH1443 63 Motor Unit(M1) EXA1335
19 Spring EBH1446 64 Motor Unit(M2) EXA1279
20 Spacer CNN-030 65 Head Base Unit EXA1340
21 Spring EBL1016 66 Gear Unit EXA1281
22 Connector(CN252) CKS2127 67 Guide Unit EXA1356
23 Photo-Interrupter(EGN3) EGN1002 68 Chassis Unit EXA1405
24 Roller ELA1281 69 Pinch Roller Unit EXA1284
25 Shaft ELA1282 70 Pinch Roller Unit EXA1285
26 Roller ELA1283 71 Reel Unit EXA1486
27 Cover ENC1307 72 Arm Unit EXA1338
28 Connector(CN251) CKS1711 73 Sub Chassis Unit EXA1312
29 Connector(CN253) CKS2129 74 Arm Unit EXA1289
30 Arm ENC1310 75 Spare Unit EXA3021
31 Arm ENC1311 76 Screw HBA-147
32 Lever ENC1312 77 Washer HBF-179
33 Holder ENC1365 78 Screw JGZ20P025FNI
34 Cover ENC1372 79 Screw EBA1037
35 Lever ENC1315 80 P.C.B Unit EXA1429
36 Lever ENC1353 81