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Service
Manual ORDER NO.
CRT2543
GS430
AUDIO SYSTEM
HEAD UNIT
VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
LEXUS GS430 EUROPE August 2000 86120-3A592 P3723 KEX-M8606ZT/EW
LEXUS GS430 EUROPE August 2000 86120-3A592 P3723 KEX-M8606ZT-91/EW
LEXUS GS430 EUROPE August 2000 86120-3A602 P3725 KEX-M8706ZT/EW
LEXUS GS430 EUROPE August 2000 86120-3A602 P3725 KEX-M8706ZT-91/EW
Manufactured for TOYOTA
by PIONEER CORPORATION PUB. NO. CRT2543
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
KEX-M8606ZT/EW KEX-M8706ZT/EW
ID No.P3723 ID No.P3725
- This service manual should be used together with the following manual(s):
Model Order No. Mech. Module Remarks
CX-631 CRT1640 2L Cassette Mech. Module:Mech.Description
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
- These models do not provide the test mode for CD changers.
- KEX-M8606ZT/EW and KEX-M8706ZT/EW have adopted AVC-LAN.
- Supplementary model is identical to the original except for the addition of following items.
Description Part No.
KEX-M8606ZT-91/EW KEX-M8706ZT-91/EW
Polyethylene Bag CEG1106 CEG1106
Carton CHA1721 CHA1721
Contain Box CHL4163 CHL4164
Cover CEG1045 CEG1045
CONTENTS
1. SAFETY INFORMATION ............................................3 7. GENERAL INFORMATION .......................................49
2. EXPLODED VIEWS AND PARTS LIST .......................4 7.1 DIAGNOSIS .......................................................49
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...10 7.1.1 DISASSEMBLY ........................................49
4. PCB CONNECTION DIAGRAM ................................26 7.1.2 CONNECTOR FUNCTION DESCRIPTION ..50
5. ELECTRICAL PARTS LIST ........................................38 7.1.3 TROUBLESHOOTING................................51
6. ADJUSTMENT..........................................................45 7.2 IC ........................................................................52
7.3 EXPLANATION..................................................55
7.3.1 CIRCUIT DESCRIPTION...........................55
7.3.2 SYSTEM BLOCK DIAGRAM ...................56
7.3.3 OPERATIONAL FLOW CHART ................57
8. OPERATIONS AND SPECIFICATIONS.....................58
2
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-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.
3
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR(KEX-M8606ZT)
1
3
1
1
15
5
42
7
16
45
11
6
19 7 17
44
18 9 10
12
43
43
8
14
8 8
8
13
21
30
21
26
28 24
29 31
21
4
40
43 27 21
39
35
32 37
36
33 41 23
26
34 2
22
38
28
25 29
34
33 43
32
2
20
4
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-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(KEX-M8606ZT)
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ26P050FMC 26 Lighting Conductor CNV4806
2 Screw BMZ30P050FMC 27 Rubber CNV4808
3 Case CNB2552 28 Lighting Conductor CNV4868
4 Insulator CNM6654 29 Holder CNV4899
5 Cushion CNM6934 30 Keyboard Unit CWM7100
6 Main Unit CWM7088 31 Socket(CN901) CKS3555
7 Screw BMZ30P080FMC 32 Knob Assy CXA9743
8 Screw BPZ30P060FSN * 33 Knob CAA1410
9 Terminal(CN202) CKF1059 34 Spring CBL-108
10 Terminal(CN303) CKF1059 35 Button Assy(AM) CXB1607
11 Connector(CN302) CKM1065 36 Button Assy(TAPE) CXB1608
12 Connector(CN301) CKM1322 37 Button Assy(FM) CXB1611
13 Plug(CN651) CKS3542 38 Grille Unit CXB5292
14 Connector(CN701) CKS3568 39 Door CAT2130
15 Antenna Jack(CN201) CKX1041
40 Spring CBH1371
16 Holder CNC8711 41 Button Assy(DISC) CXB5504
17 Holder CNC8712 42 Cassette Mechanism Module EXK3885
18 FM/AM Tuner Unit CWE1591 43 Screw IMS26P050FMC
19 Holder CNC6122 44 Transistor(Q331) 2SB1185
20 Chassis Unit CXB5290
45 Transistor(Q521) 2SB1185
21 Screw BPZ26P080FMC
22 Button(EJECT) CAC4839
23 Button(CH-PROG-DISC) CAC6549
24 Button(SEEK-TRACK) CAC6550
25 Button(TA) CAC4939
5
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
2.2 EXTERIOR(KEX-M8706ZT)
1
3
1
1
15
5
42
7
16
45
11
6
19 7 17
44
18 9 10
12
43
43
8
14
8 8
8
13
21
30
21
26
28 24
29 31
21
4
40
43 27 21
39
35
32 37
36
33 41 23
26
34 2
22
38
28
25 29
34
33 43
32
2
20
6
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
- EXTERIOR SECTION PARTS LIST(KEX-M8706ZT)
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ26P050FMC 26 Lighting Conductor CNV4806
2 Screw BMZ30P050FMC 27 Rubber CNV4808
3 Case CNB2552 28 Lighting Conductor CNV4868
4 Insulator CNM6654 29 Holder CNV4899
5 Cushion CNM6934 30 Keyboard Unit CWM7106
6 Main Unit CWM7088 31 Socket(CN901) CKS3555
7 Screw BMZ30P080FMC 32 Knob Assy CXA9743
8 Screw BPZ30P060FSN * 33 Knob CAA1410
9 Terminal(CN202) CKF1059 34 Spring CBL-108
10 Terminal(CN303) CKF1059 35 Button Assy(DISC) CXB5504
11 Connector(CN302) CKM1065 36 Button Assy(FM) CXB1611
12 Connector(CN301) CKM1322 37 Button Assy(TAPE) CXB1608
13 Plug(CN651) CKS3542 38 Grille Unit CXB5294
14 Connector(CN701) CKS3568 39 Door CAT2132
15 Antenna Jack(CN201) CKX1041 40 Spring CBH1371
16 Holder CNC8711 41 Button Assy(AM) CXB1607
17 Holder CNC8712 42 Cassette Mechanism Module EXK3885
18 FM/AM Tuner Unit CWE1591 43 Screw IMS26P050FMC
19 Holder CNC6122 44 Transistor(Q331) 2SB1185
20 Chassis Unit CXB5290 45 Transistor(Q521) 2SB1185
21 Screw BPZ26P080FMC
22 Button(TA) CAC4939
23 Button(SEEK-TRACK) CAC6550
24 Button(CH-PROG-DISC) CAC6549
25 Button(EJECT) CAC4839
7
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
2.3 CASSETTE MECHANISM MODULE
8
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
- CASSETTE MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BSZ20P040FMC 31 Gear ENV1347
2 Washer CBF1037 32 Collar ENV1508
3 Washer CBF1038 33 Gear ENV1350
4 Washer CBG1003 34 Flywheel ENV1500
5 Deck Unit EWM1027 35 Worm Gear ENV1439
6 Screw(M2x5) EBA1028 36 Worm Wheel ENV1440
7 Screw(M2x2.5) EBA1037 37 Gear ENR1037
8 Spring EBH1531 38 Lever ENV1533
9 Spring EBH1589 39 Arm ENV1525
10 Connector(CN251) CKS3540 40 Gathering PCB ENX1037
11 Spring EBH1515 41 Gathering PCB ENX1060
12 Spring EBH1587 42 Switch(S1)(S2) ESG1004
13 Spring EBH1517 43 Motor Unit(M2)(SUB) EXA1382
14 Spring EBH1518 44 Chassis Unit EXA1559
15 Spring EBH1519 45 Tube ENM1039
16 Spring EBH1537 46 Roller ENR1027
17 Cord EDD1027 47 Reel Unit EXA1560
18 Photo-interrupter(EGN2,3) EGN1006 48 Head Base Unit EXA1434
19 Photo-interrupter(EGN1) EGN1005 49 Lever Unit EXA1578
20 Roller ENR1031 50 Gear Unit EXA1545
21 Shaft ELA1362 51 Frame Unit EXA1476
22 Roller ELA1348 52 Lever Unit EXA1439
23 Arm ENC1490 53 Head Assy(HD1) EXA1594
24 Arm ENC1397 54 Motor Unit(M1)(MAIN) EXA1499
25 Guide ENC1519 55 Washer HBF-179
26 Holder ENC1516 56 Screw JGZ20P025FNI
27 Lever ENC1448 57 Spring EBH1545
28 Arm ENC1488 58 Washer YE20FUC
29 Roller ENR1023 59 Pinch Roller Unit EXA1533
30 Belt ENT1027 60 Pinch Roller Unit EXA1532
61 Capacitor(C1) CEAL4R7M35
9
1 2 3 4
KEX-M8606ZT,M8606ZT-91,M8706ZT,M8706ZT-91
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
A MAIN UNIT
FM/AM TUNER UNIT
A
CN201
B L2 D5 Q3 L4 D7 T31 Q31 CF51 CF52 CF53 L52
FM-L
25
Q703
41 9 10 14 15 17 19 47 1 2
MUTE
MAIN IC1 30 IC2 19
FM 34 7 AM-L
ANT PA4026A 28 PA4024A Lch
OSC Q705
Q201 6 38 36 32 23 25 31 40 7 43 MUTE
AM RF
AM FMSL SL
26 9
AMSL
CF230 CF232 18 AM NOISE
CANCELLER Q2
AM
FMB IC203
OSC STO/AMDET 10
AM-L 3 9
AMB HA12181FP
AMIFC
D231 ST
ST 3
COMP
AMTV
FMSD
VCO
FMTV
TUNB
PNS
16
19 20 17 15 2114 13 11 6 2
COMP
Q201
SD
25 29 9
5
IC201 PM2007A
4
PLL
PDI
PCK RDS DECODER
XOUT
PDO
XIN
B PCE
20
IC204 PM4006B
18 2 IC205 1 57K
38 37 3
NJM2903M
11 12
TAPE-L
C DECK UNIT
CN252 CN251 CN701
SL
+B
1 4 4 AUD+B
TAPE EQUALIZER 22 25 95
FWD 51 88 57K
6 Q706 TAPEMUTE PDI
LcH 53
IC251 PCK
3 3
HA12216F TAPE-L PDO
4 PCE
2 17 14
REV
LcH VR301 NR MTL
5
BU
VREF
Q271 SYSTEM
B.U 20 20 BU
MTL
RESET
Q351 IC703 1 12
VDD RESET PD
STBY
Q352 2 S-80736AN-D0
19 18 7 17
5
C SUB
M
MECHANISM DRIVER
MOTOR 2
IC351
PA2020A
DSSILL
LOAD
XOUT
XIN
8 9 1 10
E CN253
4 6 1 8 3 2
13 15 51
REEL PCB 4 6 1 8 3 2
FWD
SENSE Q528
REV
SENSE
MODE 70