Pioneer Lexus SC400 User manual

ORDER NO.
CRT2222
Se r v i c e
M a nu a l
PUB. NO. CRT2222
AUDIO SYSTEM
HEAD UNIT
Manufactured for TOYOTA
by PIONEER ELECTRONIC CORPORATION
SC400
VEHICLE DESTINATION PRODUCED AFTER ID No. TOYOTA PART No. PIONEER MODEL No.
LEXUS SC400 KEX-M8886ZT/UC
LEXUS SC300 KEX-M8886ZT-91/UC
August 1998 P6807 86120-24350
U.S.A.,CANADA
SC300

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KEX-M8886ZT,M8886ZT-91
-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.
ASL
1 2345
BASS MID
6
PROG SKIP RPT
AM
RPT RANDOM
TRACK
FM1/2 TAPE CD
TREB BAL FADE
B•C
FASTSCAN
SEEK
TUNE
DISC
FF REW
SCAN
SCAN
PREMIUM SOUND SYSTEM
P6807
-Supplementary model is identical to the original except for the addition of following items.
Description Part No.
KEX-M8886ZT-91/UC
Polyethylene Bag CEG1026
Cover CEG2095
Carton CHA2025
Contain Box CHD2025
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 ........................................29
6. ADJUSTMENT..........................................................37
7. GENERAL INFORMATION .......................................44
7.1 PARTS................................................................44
7.1.1 IC ..............................................................44
7.1.2 DISPLAY...................................................48
7.2 DIAGNOSIS.......................................................49
7.2.1 DIAGNOSIS MODE .................................49
7.2.2 DISASSEMBLY ........................................53
7.2.3 CONNECTOR FUNCTION DESCRIPTION ..54
7.3 EXPLANATION..................................................55
7.3.1 BLOCK DIAGRAM ...................................55
7.3.2 SYSTEM BLOCK DIAGRAM ...................56
8. OPERATIONS AND SPECIFICATIONS.....................57

3
KEX-M8886ZT,M8886ZT-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-M8886ZT,M8886ZT-91
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR

5
KEX-M8886ZT,M8886ZT-91
Mark No. Description Part No. Mark No. Description Part No.
-EXTERIOR SECTION PARTS LIST
1 Screw BMZ26P050FMC
2 Screw BMZ30P050FMC
3 Chassis CNA2011
4 Case CNB2262
5 Cushion CNM3138
6 Main Unit CWM5679
7 Screw BMZ30P060FMC
8 Screw CBA1339
9 Connector(CN803) CKM1087
10 Connector(CN801) CKM1222
11 Connector(CN802) CKM1238
12 Plug(CN604) CKS-291
13 Connector(CN601) CKS2826
14 Plug(CN602) CKS3534
15 Plug(CN603) CKS3542
16 86146-48030(CN551) CKX1057
17 86146-48040(CN552) CKX1058
18 Holder(CN804) CNC2218
19 Holder CNC7490
20 Holder CNC7491
* 21 Sheet CNM6076
22 FM/AM Tuner Unit CWE1523
23 Holder CNC6774
24 Chassis Unit CXB2117
25 Screw BPZ26P100FMC
26 Button(AM) CAC2303
27 Button(FM 1/2) CAC2304
28 Button(TAPE) CAC2305
29 Button(1,2) CAC2307
30 Button(3,4) CAC2308
31 Button(5,6) CAC2309
32 Button(EJECT) CAC2310
33 Button(SCAN) CAC2311
34 Button(ASL) CAC5453
35 Button(CD) CAC5460
36 Button(SEEK) CAC5462
37 Sheet CNM2362
38 Spacer CNM6047
39 Holder CNV2320
40 Holder CNV2321
41 Holder CNV2324
42 Holder CNV2325
43 Holder CNV2326
44 Lens CNV2329
45 Lens CNV2330
46 Lens CNV2333
47 Lens CNV3390
48 Lens CNV5220
49 Holder CNV5221
50 Lens CNV5502
51 Lens CNV5503
52 Keyboard Assy CWM5680
53 LCD CAW1463
54 Socket(CN902) CKS3547
55 Socket(CN903) CKS3548
56 Socket(CN901) CKS3555
57 Holder CNC6709
58 Conductor CNC7488
59 Plate CNM2530
60 Volume CCS1119
61 Holder CNV2327
62 Lens CNV2833
63 Rubber CNV5210
64 Rubber CNV5216
65 Knob CAA1237
66 Plug(CN951) CKS3535
67 Holder CNC6710
68 Lens Assy CXA4208
69 Lens CNV2332
70 Grille Unit CXB2120
71 Door CAT1934
72 Spring CBH1371
73 Cassette Mechanism ModuleEXK3240
74 Screw IMS30P040FMC
75 Transistor 2SB942
76 Screw CBA1200
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.

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KEX-M8886ZT,M8886ZT-91
2.2 CASSETTE MECHANISM MODULE

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KEX-M8886ZT,M8886ZT-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

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KEX-M8886ZT,M8886ZT-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".
FM EMITTER FOLLOWER
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
A-a
A
C

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KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
HA12187FP
A-b
A
C

10
KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
FM EMITTER FOLLOWER
A-a A-b
A-a

11
KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
A-a A-b
A-a
C
D

12
KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
HA12187FP
A-a A-b
A-b

13
KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
A-a A-b
A-b
C

14
KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
3.2 FM/AM TUNER UNIT
B
39K
56K
FM/AM TUNER UNIT
B

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KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
A
T
B

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KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
3.3 CASSETTE MECHANISM MODULE
A
E
E
CN601

17
KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
F
G
F
E
G

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KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
Capacitor
Connector
P.C.Board Chip Part
SIDE A
SIDE B
NOTE FOR PCB DIAGRAMS
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
4. PCB CONNECTION DIAGRAM
4.1 MAIN UNIT
A
B
MAIN UNIT
A

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KEX-M8886ZT,M8886ZT-91
5678
A
B
C
D
5678
SIDE A
A
C
CN901
C
CN902
E
CN251

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KEX-M8886ZT,M8886ZT-91
A
1234
B
C
D
1234
A
MAIN UNIT
A