Pioneer KEX-M8806ZT/EW User manual

ORDER NO.
CRT2546
PUB. NO. CRT2546
AUDIO SYSTEM
HEAD UNIT
Manufactured for TOYOTA
by PIONEER CORPORATION
VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
LEXUS LX470 EUROPE August 2000 86120-60410 P3726 KEX-M8806ZT/EW
LEXUS LX470 EUROPE August 2000 86120-60410 P3726 KEX-M8806ZT-91/EW
LEXUS LX470 EUROPE August 2000 86120-60400 P3727 KEX-M8906ZT/EW
LEXUS LX470 EUROPE August 2000 86120-60400 P3727 KEX-M8906ZT-91/EW
LX470
Service
Manual

2
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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.
-These models do not provide the test mode for CD changers.
-KEX-M8806ZT/EW and KEX-M8906ZT/EW have adopted AVC-LAN.
KEX-M8806ZT/EW
-Supplementary model is identical to the original except for the addition of following items.
Description Part No.
KEX-M8806ZT-91/EW KEX-M8906ZT-91/EW
Polyethylene Bag CEG1106 CEG1106
Carton CHA1721 CHA1721
Contain Box CHL4141 CHL4142
Cover CEG1045 CEG1045
KEX-M8906ZT/EW
ID No.P3726 ID No.P3727
-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
CONTENTS
1. SAFETY INFORMATION ............................................3
2. EXPLODED VIEWS AND PARTS LIST .......................4
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...10
4. PCB CONNECTION DIAGRAM ................................26
5. ELECTRICAL PARTS LIST ........................................38
6. ADJUSTMENT..........................................................45
7. GENERAL INFORMATION .......................................49
7.1 DIAGNOSIS .......................................................49
7.1.1 DISASSEMBLY ........................................49
7.1.2 CONNECTOR FUNCTION DESCRIPTION ..50
7.1.3 TROUBLESHOOTING................................51
7.2 IC ........................................................................52
7.3 EXPLANATION..................................................55
7.3.1 SYSTEM BLOCK DIAGRAM ...................55
7.3.2 OPERATIONAL FLOW CHART ................56
8. OPERATIONS AND SPECIFICATIONS.....................57

3
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
3
1
11
515
45
717
11
12
10
43
44
42
6
43
18 9
19
16
7
8
813
14
8
8
4
2
2
20
27 21
30
31 21
21 21
21
50
46
46
36 41
37
35
49
49
43
23
26
39
40
24
26
43
33
34
32
22 38
25
33 34
32
48
47
29
28
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR(KEX-M8806ZT)

5
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ26P050FMC
2 Screw BMZ30P050FMC
3 Case CNB2590
4 Insulator CNM6654
5 Cushion CNM6934
6 Main Unit CWM7246
7 Screw BMZ30P080FMC
8 Screw BPZ30P060FSN
9 Terminal(CN202) CKF1059
10 Terminal(CN303) CKF1059
11 Connector(CN302) CKM1065
12 Connector(CN301) CKM1322
13 Plug(CN651) CKS3542
14 Connector(CN701) CKS3568
15 Antenna Jack(CN201) CKX1041
16 Holder CNC8711
17 Holder CNC8712
18 FM/AM Tuner Unit CWE1610
19 Holder CNC6122
20 Chassis Unit CXB5297
21 Screw BPZ26P100FMC
22 Button(EJECT) CAC6642
23 Button(CH,PROG,DISC) CAC6771
24 Button(SEEK,TRACK) CAC6772
25 Button(TA) CAC6711
26 Lighting Conductor CNV6144
27 Rubber CNV6145
28 Lighting Conductor CNV6500
29 Holder CNV6502
30 Keyboard Unit CWM7103
31 Socket(CN901) CKS3555
32 Knob Assy CXB5296
* 33 Knob CAA1500
34 Spring CBL-108
35 Button(AM) CAC5252
36 Button(TAPE) CAC5254
37 Button(FM) CAC5253
38 Grille Unit CXB6093
39 Door CAT2167
40 Spring CBH1371
41 Button(DISC) CAC6186
42 Cassette Mechanism ModuleEXK3885
43 Screw IMS26P050FMC
44 Transistor(Q331) 2SB1185
45 Transistor(Q521) 2SB1185
46 Shield CNC9047
47 Holder CNV6503
48 Lighting Conductor CNV6501
49 Holder Unit CXB2765
50 Lighting Conductor CNV6143
-EXTERIOR SECTION PARTS LIST(KEX-M8806ZT)
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.

6
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
3
1
11
515
45
717
11
12
10
43
44
42
6
43
18 9
19
16
7
8
813
14
8
8
4
2
2
20
27 21
30
31 21
21 21
21
50
46
46
36 41
37
35
49
49
43
23
26
39
40
24
26
43
33
34
32
22 38
25
33 34
32
48
47
29
28
2.2 EXTERIOR(KEX-M8906ZT)

7
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ26P050FMC
2 Screw BMZ30P050FMC
3 Case CNB2590
4 Insulator CNM6654
5 Cushion CNM6934
6 Main Unit CWM7246
7 Screw BMZ30P080FMC
8 Screw BPZ30P060FSN
9 Terminal(CN202) CKF1059
10 Terminal(CN303) CKF1059
11 Connector(CN302) CKM1065
12 Connector(CN301) CKM1322
13 Plug(CN651) CKS3542
14 Connector(CN701) CKS3568
15 Antenna Jack(CN201) CKX1041
16 Holder CNC8711
17 Holder CNC8712
18 FM/AM Tuner Unit CWE1610
19 Holder CNC6122
20 Chassis Unit CXB5297
21 Screw BPZ26P100FMC
22 Button(TA) CAC6711
23 Button(SEEK,TRACK) CAC6772
24 Button(CH,PROG,DISC) CAC6771
25 Button(EJECT) CAC6642
26 Lighting Conductor CNV6144
27 Rubber CNV6145
28 Lighting Conductor CNV6500
29 Holder CNV6502
30 Keyboard Unit CWM7247
31 Socket(CN901) CKS3555
32 Knob Assy CXB5296
* 33 Knob CAA1500
34 Spring CBL-108
35 Button(DISC) CAC6186
36 Button(FM) CAC5253
37 Button(TAPE) CAC5254
38 Grille Unit CXB6094
39 Door CAT2168
40 Spring CBH1371
41 Button(AM) CAC5252
42 Cassette Mechanism ModuleEXK3885
43 Screw IMS26P050FMC
44 Transistor(Q331) 2SB1185
45 Transistor(Q521) 2SB1185
46 Shield CNC9047
47 Holder CNV6503
48 Lighting Conductor CNV6501
49 Holder Unit CXB2765
50 Lighting Conductor CNV6143
-EXTERIOR SECTION PARTS LIST(KEX-M8906ZT)

8
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
2.3 CASSETTE MECHANISM MODULE

9
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBF1038
4 Washer CBG1003
5 Deck Unit EWM1027
6 Screw(M2x5) EBA1028
7 Screw(M2x2.5) EBA1037
8 Spring EBH1531
9 Spring EBH1589
10 Connector(CN251) CKS3540
11 Spring EBH1515
12 Spring EBH1587
13 Spring EBH1517
14 Spring EBH1518
15 Spring EBH1519
16 Spring EBH1537
17 Cord EDD1027
18 Photo-interrupter(EGN2,3) EGN1006
19 Photo-interrupter(EGN1) EGN1005
20 Roller ENR1031
21 Shaft ELA1362
22 Roller ELA1348
23 Arm ENC1490
24 Arm ENC1397
25 Guide ENC1519
26 Holder ENC1516
27 Lever ENC1448
28 Arm ENC1488
29 Roller ENR1023
30 Belt ENT1027
31 Gear ENV1347
32 Collar ENV1508
33 Gear ENV1350
34 Flywheel ENV1500
35 Worm Gear ENV1439
36 Worm Wheel ENV1440
37 Gear ENR1037
38 Lever ENV1533
39 Arm ENV1525
40 Gathering PCB ENX1037
41 Gathering PCB ENX1060
42 Switch(S1)(S2) ESG1004
43 Motor Unit(M2)(SUB) EXA1382
44 Chassis Unit EXA1559
45 Tube ENM1039
46 Roller ENR1027
47 Reel Unit EXA1560
48 Head Base Unit EXA1434
49 Lever Unit EXA1578
50 Gear Unit EXA1545
51 Frame Unit EXA1476
52 Lever Unit EXA1439
53 Head Assy(HD1) EXA1594
54 Motor Unit(M1)(MAIN) EXA1499
55 Washer HBF-179
56 Screw JGZ20P025FNI
57 Spring EBH1545
58 Washer YE20FUC
59 Pinch Roller Unit EXA1533
60 Pinch Roller Unit EXA1532
61 Capacitor(C1) CEAL4R7M35
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM MODULE SECTION PARTS LIST

10
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
Q3
L2 D5 L4 D7
25
26
Q201
AM RF
AM
OSC
FM
OSC
D231
CF52
CF51
T31 Q31
CF232
CF230
23 25
PA4026A
IC1
CF53 L52
PA4024A
IC2
AM
CN201
ANT
FMTV
AMTV
VCO
AMIFC
FMB
AMB
TUNB
19 20 17 15 21 14 13 11 62
IC201 PM2007A
PLL
XIN
XOUT
PDI
PCK
PDO
PCE
29
25
COMP
95
4
IC204 PM4006B
11 12
IC205
NJM2903M
RDS DECODER
CN251
CN252
CN253
IC251
HA12216F
TAPE EQUALIZER
MECHANISM DRIVER
IC351
PA2020A
Q271
B.U
BU
M
SUB
MOTOR
M
MAIN
MOTOR
10
+B
TAPE-L
MTL
MTL
VR301
VREF
6
22
14
17
2
51
53
17
7
18
19
5
2
NR
Q351
Q352
1
9
8
STBY
LOAD
LOAD
SWITCH
MODE
SENSE
FWD
SENSE
REV
SENSE
1
4
5
4
3
20
FWD
LcH
REV
LcH
23
8
1
64
23
8
1
64
41 910
34
638 36 32
14 15 17 19
30
31
28
47 12
19
40 7 43
Lch
FMSL
AMSL
STO/AMDET
ST
COMP
FMSD
PNS
S-80736AN-D0
IC602
2
1
RESET
VDD
Q528
Q530
Q
Q205
HA12181FP
IC203
AM NOISE
CANCELLER
3AM-L 9
16
Q703
MUTE
FM-L
BU
CN701
4
3
20
19
6
20 18 2
3157K
25
57K
13 15
12
RESET
AUD+B
TAPE-L
Q201
SL
51
DSSILL
XIN
XOUT
SYSTEM CO
IC60
PDI
PCK
PDO
PCE
ST
SD
SL
SD
95 90
ST
89
38 37
AMAIN UNIT
FM/AM TUNER UNIT
B
CDECK UNIT
DPCB UNIT
E
REEL PCB
7
9
18
10
3
PD560
SWITCH
70µs
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
5678
A
B
C
D
5678
11
Q528
Q530
Q527
Q529
Q531
BU
Q521
Q522
Q525 Q526
ILLUMINATION
DIMMER
CONTROL
ACC
BU
Q501
Q323
5V
REGULATOR
VDD5V
VDD
Q332
Q331
AUD+B
TUNB
BU
8V
REGULATOR
Q553
VDD SWITCH
VDD
SYSPW
Q337-1
Q336
Q337-2
Q335
Q302
ASEN
Q301
BSEN
Q303
ISEN
BU
Q358
MUTE CONTROL
Q755 Q756
Q753
Q603
PML003AM
E-VOL
IC701 RL
Q205
P
E
R
9
Q703
MUTE
Q701
AM-L
2
11
KEY
MATRIX
20
5
EJECT
TAPE-L
FMMT
FMMT
38
SYSTEM CONTROLLER
IC601
PDI
CK
DO
CE
SL
SD
95 90
ST
89
AMPW
AMPW 44
FMPW 43 AUD+B
73
75
23
ASEN
BSEN
ISEN
HA12187FP
IC681
AVC LAN
6
5
TX+
TX-
50
SYSMUTE
AMPMUT
IPPW
8
1
2
TX
RX
AMPMUT
RX
TX
IPPW 22
30
29
49
CN301
CN302
BU
ACC
ANT
MUTE
ILL+
+B
ACC
ILL-
FMPW
AMB
FMB
Q335
Q336
F
KEYBOARD UNIT
PD5600B
14322
POWER
VOLGND
ENC1M
ENC2P
CN901
24 21 415
CN651
KD1
POWER
ENC1M
POWER
53 54 55
ENC1P
ENC2M
ENC1P
KD1
KST2
2110 13 8
17
KST2 ENC1M ENC1P ENC2M ENC2P
12
3
22
KST2
59
KD1
67
ENC2M
86
ENC2P
87
FM-L
4
3
MUTE CONTROL
Q357
KEX-M8806ZT *A: S901 POWER-VOL
*B: S902 TUNE
KEX-M8906ZT *A: S902 POWER-VOL
*B: S901 TUNE
*A *B
KEX-M8806ZT : S904
KEX-M8906ZT : S903

12
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
3.2 MAIN UNIT(GUIDE PAGE)
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
A
CASSETTE
MECHANISM MODULE CD E
E-VOL
FM MUTE
RBDS DECODER
PLL
B
AMAIN UNIT FM:-26dBs(400Hz,30%)
AM:-16dBs(400Hz,30%)
TAPE:- 8dBs
FM:-32.5dBs
AM:-23.5dBs
TAPE:-14.5dBs
AUX :-11.5dBs
AM
FM
AM
AM
AM
AM
AM
FM
AM
FM
FM
AM
FCN901
A-a
A-aA-a A-bA-b
A-aA-a A-bA-b
A-bA-b
A-aA-a
Large size
SCH diagram
Guide page
Detailed page

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
5678
A
B
C
D
5678
13
A
SYSTEM
CONTROLLER
5V REGULATOR
AUDIO 8V REGULATOR
BU ACC ILL SENSE
BU MUTE
ILL 8V REGULATOR
ILL DIMMER CONTROL
ANT CONTROL
AMP CONTROL
MUTE
BEEP
AVC LAN
RESET
SYSTEM MUTE
FM:-15dBs
AM:-15dBs
TAPE:-6dBs
AUX :+2.2dBs
A-b

14
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
A-a
A-a A-b
SYSTEM CONTROLLER
PLL
B
AMAIN UNIT FM:-26dBs(400Hz,30%)
AM:-16dBs(400Hz,30%)
AM
FM
FCN901
1
2
3

15
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
5678
A
B
C
D
5678
A-a
A-a A-b
CASSETTE MECHANISM MODULE CD E
E-VOL
FM MUTE
RBDS DECODER
TAPE:- 8dBs
FM:-32.5dBs AM:-23.5dBs TAPE:-14.5dBs AUX :-11.5dBs
AM
AM
AM
AM
AM
FM
AM
FM
FM
AM
4
5
6
7

16
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
A-a A-b
A-b
LER
5V REGULATOR
ILL 8V REGULATOR
ILL DIMMER CONTROL
ANT CONTROL
AMP CONTROL
MUTE
BEEP
AVC LAN
1
2
3

17
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
5678
A
B
C
D
5678
A-b
A-a A-b
5V REGULATOR
AUDIO 8V REGULATOR
BU ACC ILL SENSE
BU MUTE
RESET
SYSTEM MUTE
FM:-15dBs AM:-15dBs TAPE:-6dBs AUX :+2.2dBs
4
5
6
7

18
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
3.3 FM/AM TUNER UNIT
B
BA
FM/AM TUNER UNIT
PA4023B
IC1

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
5678
A
B
C
D
5678
19
B
IC2 PA4024A

20
KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91
A
1234
B
C
D
1234
3.4 CASSETTE MECHANISM MODULE
C
DECK UNIT
B/C
HA12216F
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29 28 27
26 25
24
23
22 21
1
2 3 4
5 6
7
8
9 10
R256
180
R291
0R0
C271
1/50
R283 0R0
R284 0R0
R282 0R0
C253 390P
C254 390P
C252 390P
C251 390P
R281 0R0
R255
180
C256
R01
R258
18K
R402
3R3K
R403 910
R275
47K
R293
0R0
C272 R1
R285 0R0
HD1
HEAD ASSY
EXA1594
TEST TAPE
NCT-150
(400Hz, 200nWb/m)
RL
RR
FR
FL
C302
R1
VR302
33K(B)
-8.24dBs(300mV)±1dB
Fwd-R
Fwd-L
Rev-R
Rev-L
NFI(L)
RIN(L)
RIP
FIN(L)
GND
GND
FIN(R)
VREF
RIN(R)
NFI(R)
M-OUT(R)
EQOUT(R)
TAI(R) BIAS RAI(R)
PBOUT(R)
DET(L)
MUTE
MSGV(R)
MAOUT
MSI
MSDET
MSGV
F/R
120/70
NR
MOUT(L)
EQOUT(L)
TAI(L)
NC
RAI(L)
PBOUT(L)
NC
DET(L)
MSGV(S)
CN252
CN251
DOLBY B NR
IC251
VR301
33K(B)
C310
R1
C309
R1
R321
0R0
VCC
CCP1280
CCP1280
NC
MSOUT
NC
NC
R260
13K
R262
270K
C401
4700P
R401
12K
R276
100K
C402
R33
C404 R01
C403
R022
R288
0R0
R274
0R0
R289
0R0
R273
0R0
R272
0R0
R404
270K
C405 R033
R2
22
R278 100K
Q271
2SC4116
R292
0R0
R271
18K
C301
R1
R294
0R0
R259
13K
C255
R01
R257
18K
R261
270K
C
ACN701