Pioneer GM-8406-ZT, GM-8406-ZT-91 Service manual

Service

Manual

LX470

ORDER NO.

CRT2498

AUDIO SYSTEM POWER AMPLIFIER

VEHICLE	DESTINATION	PRODUCED AFTER	TOYOTA PART No.	ID No.			PIONEER MODEL No.
LEXUS LX470	U.S.A	August 2000	86280-60250				GM-8406ZT/UC
	Canada						GM-8406ZT-91/UC

Manufactured for TOYOTA
by PIONEER CORPORATION	PUB. NO. CRT2498

GM-8406ZT,8406ZT-91

NOTE:

-The GM-8406ZT-91/UC is supplementally 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 GM-8406ZT-91/UC and GM-8406ZT/UC.

-Supplementally model is identical to the original except for the addition of following items.

	*:Non spare part
	Part No.
Description	GM-8406ZT-91/UC
Cover	CEG1057
Protector	CHP2329
Protector	CHP2330
Carton	CHG4144
Contain Box	CHL4145

- When diagnosing a product, take care of its heated portion.

Power IC	(IC801,802,803)
Power Supply IC (IC901,902)
DSP IC	(IC201,251)
Heat Sink
IC Holder

CONTENTS

1.	SAFETY INFORMATION............................................	2	7.	GENERAL INFORMATION.......................................	28
2.	EXPLODED VIEWS AND PARTS LIST ......................	3		7.1 DIAGNOSIS .......................................................	28
3.	BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....	5		7.1.1 DISASSEMBLY.........................................	28
4.	PCB CONNECTION DIAGRAM................................	12		7.1.2 CONNECTOR FUNCTION DESCRIPTION ......	30
5.	ELECTRICAL PARTS LIST........................................	20		7.2 IC ........................................................................	31
6.	ADJUSTMENT .........................................................	24		7.3 EXPLANATION...................................................	34
				7.3.1 OPERATIONAL FLOW CHART .................	34
				7.3.2 SYSTEM BLOCK DIAGRAM.....................	36
			8.	SPECIFICATIONS .....................................................	37

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.

2

GM-8406ZT,8406ZT-91

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

3

GM-8406ZT,8406ZT-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	Plug(CN906)	CKS4240	16		Cushion	CNM7009
2	Plug(CN905)	CKS4242	17		Heat Sink	CNR1566
3	Screw	BMZ30P200FMC	18		Amp Unit	CWM7110
4	Screw	BMZ50P060FMC	19		Screw	BPZ30P060FSN
5	Screw	BSZ26P060FMC	20		Screw	BSZ26P060FMC
6	Screw	BSZ30P060FMC	21		Connector(CN902)	CKM1308
7	Screw	BSZ30P100FMC	22		Connector(CN901)	CKM1310
8	Chassis	CNA2142	23		Holder	CNC8187
9	Case	CNB2563	24		Bracket	CNC8681
10	Shield Case	CNC8185	25		Sheet	CNM7015
11	Shield Case	CNC8186	26		DSP Unit	CWM7111
12	Bracket	CNC8920	27		Socket(CN102)	CKS3632
13	Bracket	CNC8919	28		Socket(CN101)	CKS4241
14	Insulator	CNM6145	29		Spacer	CNV6284
15	Seal	CNM6686	30		IC(IC902)	BA178M05T
			31		Microphone(MIC401)	CPM1011
			32		IC(IC801,802,803)	PAL006A
			33		Seal	CNM7170

4

1		2		3		4

GM-8406ZT,8406ZT-91

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

A DSP UNIT

B AMP UNIT

CRYSTAL

VCC

VCC

CN102

CN905

FRONT-L

FRONT

OSCILLATOR

8

8

OPE AMP

POWER AMP

1

IC231

2

1

IC241

D

2

FLO

FLIN

IC701

11

IC801

9

(FLP)

TC7WU04F

CK

TC7W74FU

3

13

13

3 NJM2068MD 1

10

PAL006A

7

L901

q

(FLM)

BU1

7

3

PEE

2

6

4

22

25

Q801

P

SYS4

STBY1 MPUT

CN901

Q831

REAR-L

REAR

B.U

FRONT DAC

FRONT LPF

OPE AMP

POWER AMP

7

(RLM)

5 XTI

WFL-

WFL+

IC261

IC311

1

RLO 11

IC702

11

IC802

9

(RLP)

8

AK4321VF

2

NJM2068MD

ELECTRONIC

11

RLIN NJM2068MD 1

10

PAL006A

1719

SDATA

AOUTL 18

3

6

4

22

25

VOLUME

(TWLM)

(TWLP)

A/D

(256FS)

3

22

Q802

(FDATA)

IN1

IC351

OUT1

SYS4

STBY1 MPUT

IC181

DSP

20

RL+

5 IN3

OUT3

Q832

RL-

AK5351VF

7 IN5

PM0017AMOUT5 18

SUB WOOFER

SUB WOOFER

7 AINL-

21

SDI1

IC201

REAR DAC

REAR LPF

OPE AMP

POWER AMP

7

SDATA

PD2061A

6 AINL+

19 SDI0

5 XTI

IC281

IC331

1

WFO

9

9

WFIN

IC703

11

IC803

9

FL-

FL+

SDO0

SDO2

AK4321VF

2

2 NJM2068MD 1

10

PAL006A

SDO1 16 (RDATA)

8

SDATA

AOUTL 18

NJM2068MD

6

4

22

25

Q803

17

16

SYS4

STBY1 MPUT

Q833

A

OUTPUT

19

18

16

Q950

CONNECTOR

WOOFER DAC

WOOFER LPF

SDI0

SDI1

SDO1

5 XTI

IC291

IC341

7

B

(FSW)

C

AK4321VF

5

(SPD)

DSP

SDO2

15

(WDATA)

8 SDATA

AOUTR AOUTL 18

NJM2068MD

INPUT

17

CONNECTOR

B

IC251

PD2061A

Q291

SPDO

SPD

AUDIO INPUT

L-

L+

(TWLP)

BUFFER

2

5

5

1

IC501

MUTE

N-MU

7

6

(H/U MUT)

6

6

NJM2068MD

5V REGULATOR

ACC

68

VDD

VDD5

3

16 VDD5

Q903

BU1

(TWLM)

CN902

TMUT

DSPERR

PEE P

Q915

FL-

FL+

21

PEE

PEE

SYSTEM MUTE

11

8

Q175

SMUTEIN

31

MUTI

13

6

MUTIN

ACC SENSE

Q155

ASENS 17

BACK UP SENSE

ACC1

6

13

ACC1

Q151

BU1

16

BU1

7

12

IC101

BSENS

Q171

PD5585A

RESET

9

1

2

NMUT1

12

7

NMUT

RESET

IC131

NAVI/MUTE

S-80730ANDT

NAVIMUTE 79

22

2

BUS DRIVER

SYSTEM CONTROLLER

AVCIN

15

4

23

1

IC141

7

AVCOUT

MUTE

HA12187FP

14

5

Q910

20

8

Q912

AVCPW

PMUT

15

SPEED

ASLIN1

ASLIN2

SYSPW1

MUTE

1

MUTO

9

10

MUTEO

Q909

Q911

XOUT

XIN

PWSENS

65

FS

5

14

FS

10

12

74

76

66

Q913

B

C

Q101

(FSW)

MUTE

A

/STBY 6

(ASL1)

(ASL2)

7

IC903

2

M51957BFP

AVDD

SYSA5

17

2

5V REGULATOR

SYSTEM

7

POWER SWITCH

ASL

IC902

Q904

5

8

SYSD5

18

SYS5

1

3

IC402

DVDD

1

BU1

NJM2068MD

BA178M05T

MIC401

Q401

VR401

1

8V REGULATOR

STBY1

Q906

MIC

3

IC401

8

SYS8

16

3

SYS8

1

IC901

3

NJM2068MD

SYS4

NJM2930F08K

Q161

SYSP1

8

11

SYSPW1

SYSPW1

VDD

Q907

C

SPD1

10

9

SPD1

SPEED SENSOR PULSE

CN101

CN906

D

5

1

2

3

4

1		2		3		4

GM-8406ZT,8406ZT-91

3.2 SCHEMATIC DIAGRAM

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

	PARTS LIST”.	A-a
A
		Large size
	A-a A-b	SCH diagram

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

B

6R8K 180

SYSTEM POWER

C

TAPE:-7.0dBs

270

4R7K

TAPE:-2.6dBs

270

4R7K

D

270

4R7K

6 A B

1

2

3

4

5

OUTPUT OFFSET

INDICATOR

	33K
	2R7K
4R7/50	33K

OUTPUT OFFSET

INDICATOR

OUTPUT OFFSET

INDICATOR

OUTPUT OFFSET

INDICATOR

2R7K	UDZS7R5(B)

1R8K

18K

6		7		8

GM-8406ZT,8406ZT-91

A-b	A
	A DSP UNIT

TAPE:-3.4dBs

TAPE:-15.5dBs

TAPE:-8.4dBs

B

C

TAPE:+1.2dBs

CD:+8.2dBs

TUNER: -13dBs

SPEED SENSOR PULSE

		TAPE:+23.4dBs				D
		CD:+30.4dBs
		TUNER:+9.4dBs
		NOTE :
		Symbol indicates a resistor.	Decimal points for resistor
		No differentiation is made between chip resistors and
			and capacitor fixed values
		discrete resistors.
			are expressed as :
		Symbol indicates a capacitor.	2.2 ←	2R2
	B AMP UNIT	No differentiation is made between chip capacitors and	0.022	← R022
CRANKING		discrete capacitors.
PREVENTION CIRCUIT
				A	B	7

5		6		7		8

1

2

3

4

GM-8406ZT,8406ZT-91

1

2

	A-b
A	A-a

B

C

180

6R8K

D

8 A-a

SYSTEM POWER

1

2

3

4

5	6	7		8
			GM-8406ZT,8406ZT-91
3	4	5		6
OUTP IND		OUTPUT OFFSET INDICATOR	OUT IN	A-a A-b

A

270	270	270
4R7K	4R7K	4R7K
	TAPE:-2.6dBs	B
		C
TAPE:-7.0dBs

D

A-a B 9

5		6		7		8

1		2		3		4

GM-8406ZT,8406ZT-91

A

B

C

D

A-a A-b

UNIT	TAPE:-3.4dBs
DSP
A

TAPE:-8.4dBs

TAPE:-15.5dBs

10 A-b

1

2

1

2

3

4

3

5

OUTPUT OFFSET

INDICATOR

6	4
	5	33K
		2R7K
	4R7/50	33K
	T OFFSET
	CATOR
7
	OUTPUT OFFSET
	INDICATOR
	OUTPUT OFFSET
-A	INDICATOR
	6		UDZS7R5(B)
b		2R7K
		1R8K
B8		18K
11
	D

TAPE:+1.2dBs

CD:+8.2dBs

TUNER: -13dBs

SPEED SENSOR PULSE

TAPE:+23.4dBs

CD:+30.4dBs

TUNER:+9.4dBs

NOTE :

CRANKING	B AMP UNIT
PREVENTION CIRCUIT

Symbol indicates a resistor.

No differentiation is made between chip resistors and discrete resistors.

Symbol indicates a capacitor.

No differentiation is made between chip capacitors and discrete capacitors.

Decimal points for resistor and capacitor fixed values are expressed as :

2.2	←	2R2
0.022		←	R022

A-a A-b

C		B		A

5

6

	7
8406ZT,8406ZT-GM
	8
91-

1		2		3		4

GM-8406ZT,8406ZT-91

4. PCB CONNECTION DIAGRAM

A		4.1 DSP UNIT
		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 dia-
		gram.

2. Viewpoint of PCB diagrams

Connector Capacitor

SIDE A

P.C.Board Chip Part

SIDE B

	A		DSP UNIT
							CN906
					B

B

C

D

12 A

1

2

3

4