Pioneer KEX-M8906ZT, KEX-M8806ZT Service Manual

Service

Manual

LX470 AUDIO SYSTEM HEAD UNIT

ORDER NO.

CRT2546

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

Manufactured for TOYOTA
by PIONEER CORPORATION	PUB. NO. CRT2546

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

KEX-M8806ZT/EW			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

- 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.

- 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

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 SYSTEM BLOCK DIAGRAM ...................	55
				7.3.2 OPERATIONAL FLOW CHART ................	56
			8. OPERATIONS AND SPECIFICATIONS.....................		57

2

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.

3

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR(KEX-M8806ZT)

1

1

42

		30
26	24
		48
		47
43	40
		50
	39	49
32		49
33
34	22
	38
35	25
	37

36
41	34
33	32

				3
	1
		5	15
					7
					16
				45
6				11
	19	44	7	17
18	9			10	12
					43
43
					8
				8	14
					8
				8	13

46 21

21

31

21

21

4

46

27

21

2

23

28

29

2

26

43

20

4

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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-M8806ZT)

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

5

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

2.2 EXTERIOR(KEX-M8906ZT)

1

1

42

		30
26	24
		48
		47
43	40
		50
	39	49
32		49
33
34	22
	38
35	25
	37

36
41	34
33	32

				3
	1
		5	15
					7
					16
				45
6				11
	19	44	7	17
18	9			10	12
					43
43
					8
				8	14
					8
				8	13

46 21

21

31

21

21

4

46

27

21

2

23

28

29

2

26

43

20

6

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

- EXTERIOR SECTION PARTS LIST(KEX-M8906ZT)

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

7

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

2.3 CASSETTE MECHANISM MODULE

8

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-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-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

A MAIN UNIT

B FM/AM TUNER UNIT

CN201

CF52

CF53

L52

L2

D5

Q3

L4

D7

T31

Q31 CF51

FM-L

25

Q703

41

9

10

14

15

17

19

47

1

2

MUTE

ANT

IC2

FM

34

IC1

30

19

7

PA4026A

28

PA4024A

Lch

OSC

Q201

23

25

31

40

7

43

6

38

36

32

AM RF

AM

26

FMSL 9

SL

AMSL 18

AM NOISE

CF230

CF232

AM

CANCELLER

Q205

FMB

IC203

OSC

STO/AMDET 10

AM-L

3

9

D231

AMIFC

AMB

ST

HA12181FP

FMTV AMTV

VCO

PNS

FMSD

COMP

ST

3

TUNB

16

19 20

17 15

2114 13

11

6

2

COMP

Q201

SD

25 29

9

IC201

PM2007A

5

4

PLL

B

PDI

RDS DECODER

XIN

XOUT

PCK

20

18

2

IC205

1

57K

PDO

IC204

PM4006B

PCE

38

37

3

NJM2903M

11

12

C DECK UNIT

CN252

+B

SL SD ST

1

TAPE EQUALIZER

22

95 90 89

FWD

51

IC251

6

57K

PDI

LcH

53

3

3

PCK

HA12216F

TAPE-L

PDO

REV

4

2

17

14

PCE

LcH

5

VR301

NR

MTL

BU

VREF

Q271

B.U

MTL

20

20

BU

SYSTEM C

RESET

IC60

Q351

IC602

12

VDD

1

Q352

STBY

2 S-80736AN-D0

RESET

PD56

C

19

18

7

17

SUB

M

5 MECHANISM DRIVER

MOTOR

2

IC351

PA2020A

DSSILL

E

8 9

1

10

LOAD

XOUT

XIN

CN253

13

15

51

4

6

1

8

3

2

REEL PCB

6

1

8

3

2

4

FWD

Q528

SENSE

REV

SENSE

MODE

70 s

LOAD

SENSE

SWITCH SWITCH

D PCB UNIT

Q530

MOTOR

MAIN

M

Q

6

19

D

10

1

2

3

4

5		6		7		8

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

E-VOL

CN301

2

FM-L

Q703

AM-L

3

IC701

RL

TAPE-L

4

PML003AM 11

MUTE

Q701

MUTE

Q753

FMMT

MUTE CONTROL

ANT

ILL+

R

Q205

+B

-

9

Q603

Q755 Q756

ILL

ACC

P

IPPW

AVC LAN

TX

1

8

6

TX+

IC681

5

TX-

RX

2

HA12187FP

MUTE CONTROL

Q358

AMPMUT

Q357

ACC

BU

Q302

CN302

ASEN

Q301

BSEN

BU

SL

SD ST

FMMT

SYSMUTE

Q303

95 90 89

38

50

ISEN

DI

22

CK

IPPW

Q336

DO

30

TX

CE

29

RX

49

AMPMUT

AMPW

Q337-1

SYSTEM CONTROLLER

AMPW

44

Q335

43

FMPW

AUD+B

IC601

FMPW

PD5600B

Q337-2

ASEN

73

VDD

75

BSEN

23

ENC1P

ENC1M

POWER

KST2

KD1

ENC2M

ENC2P

ISEN

VDD SWITCH

SYSPW

Q553

53

54

55 59 67 86 87

Q335

Q323

FMB

VDD5V

VDD

Q336

8V

BU

Q528

Q527

Q521

AMB

REGULATOR

BU

Q331

5V

AUD+B

REGULATOR

TUNB

		Q522
Q530	Q529
										Q332	Q501
	Q525	Q526									ACC
	ILLUMINATION
Q531	DIMMER		ENC2P	ENC2M ENC1P	ENC1M	POWER
	CONTROL						KST2	KD1
									CN651
5		24 21 22 3			4 15		12 17
20		1	4	3 22 2110			13 8		CN901
											F
									KD1
									KST2
						POWER
		KEY							*A	*B	KEYBOARD UNIT
	MATRIX					ENC1M
						ENC1P			ENC2M
						VOLGND			ENC2P
		EJECT
								KEX-M8806ZT *A: S901		POWER-VOL
		KEX-M8806ZT : S904							*B: S902	TUNE
								KEX-M8906ZT *A: S902		POWER-VOL
		KEX-M8906ZT : S903
									*B: S901	TUNE
	5						6				7

A

B

C

BU

D

11

8

1		2		3		4

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

3.2 MAIN UNIT(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS

A							Large size
							SCH diagram
		A-a			A-b

A-a	A-b	Guide page
A-a	A-b	Detailed page

B

LIST”.

A-a

A MAIN UNIT

B

F CN901

FM:-26dBs(400Hz,30%)

AM:-16dBs(400Hz,30%)

AM

FM

PLL

C

AM

	AM
	AM
AM	RBDS DECODER

TAPE:- 8dBs

CASSETTE

MECHANISM MODULE C D E

AM	AM
FM	FM

FM MUTE

FM:-32.5dBs

AM:-23.5dBs

TAPE:-14.5dBs

AUX :-11.5dBs

D

E-VOL

FM

AM

12 A

1

2

3

4

5		6		7		8

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

A-b

A

ILL 8V REGULATOR

ILL DIMMER CONTROL

	MUTE	AMP CONTROL
		B
AVC LAN	BEEP	ANT CONTROL
SYSTEM
CONTROLLER
	5V REGULATOR
		BU MUTE
RESET		C
	AUDIO 8V REGULATOR
		BU ACC ILL SENSE
	FM:-15dBs
	AM:-15dBs
	TAPE:-6dBs
	AUX :+2.2dBs
SYSTEM MUTE

D

A 13

5		6		7		8

1

2

3

4

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

1

2

3

A-a A-b

A

F CN901

B

AM:-16dBs(400Hz,30%)

FM:-26dBs(400Hz,30%)

C

B

D UNITMAIN A

14 A-a

FM

AM

SYSTEM

CONTROLLER

PLL

1

2

3

4

5

RBDS DECODER

AM

AM

AM

AM

6

7

8

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

4

5

6

7

A-a A-b

A

	E-VOL
FM:-32.5dBs AM:-23.5dBs TAPE:-14.5dBs AUX :-11.5dBs	FM	AM

B

MODULE C D E
CASSETTE MECHANISM		FM
		C
TAPE:- 8dBs	AM	FM MUTE

	FM	D
	AM

A-a 15

5		6		7		8

1		2		3		4

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

A

B

C

D

A-a A-b

16 A-b

DIMMER CONTROL	AMP CONTROL	ANT CONTROL
ILL
ILL 8V REGULATOR	MUTE	BEEP	REGULATOR
			5V

AVC LAN

	LER
1	2
	3

1

2

3

4

5		6		7		8

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

								A-b
	SENSE							A-a
MUTE	BU ACC ILL
BU
REGULATOR	AUDIO 8V REGULATOR
5V
	FM:-15dBs	AM:-15dBs	TAPE:-6dBs AUX :+2.2dBs
RESET					SYSTEM MUTE
			4	5	6	7	A-b	17
5		6			7		8

A

B

C

D

1		2		3		4

KEX-M8806ZT,M8806ZT-91,M8906ZT,M8906ZT-91

3.3 FM/AM TUNER UNIT

A

B FM/AM TUNER UNIT

A

B

IC1 PA4023B

C

D

18 B

1

2

3

4