PIONEER LX470, GM-9027ZT Service Manual

Service

Manual

LX470

ORDER NO.

CRT2883

AUDIO SYSTEM POWER AMPLIFIER

VEHICLE	DESTINATION	PRODUCED AFTER	TOYOTA PART No.	ID No.			PIONEER MODEL No.
LEXUS LX470	U.S.A., CANADA	August 2002	86280-60360				GM-9027ZT/UC
							GM-9027ZT-91/UC
LEXUS LX470	Middle and Near East	August 2002	86280-60330				GM-9027ZT/Q1
							GM-9027ZT-91/Q1

Manufactured for TOYOTA
by PIONEER CORPORATION	PUB. NO. CRT2883

1		2		3		4

A

For details, refer to "Important symbols for good services".

B
C
- GM-9027ZT/UC	- GM-9027ZT/Q1

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

				Part No.
		Description	GM-9027ZT-91/UC		GM-9027ZT-91/Q1
		Cover	Not used		CEG1045
		Polyethylene Bag	CEG1181		CEG1088
		Protector	CHP2329		Not used
		Protector	CHP2330		Not used
		Carton	CHG4144		CHG4865
E		Contain Box	CHL4862		CHL4865

F

2	GM-9027ZT/UC

1		2		3		4

5		6		7		8

SAFETY INFORMATION

A

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.

NOTE:

- 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

[ Important symbols for good services ]

In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely. When you find the procedures bearing any of the symbols, be sure to fulfill them:

1. Product safety

You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and should keep the safety during servicing by following the safety instructions described in this manual.

2. Adjustments

To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable. In accordance with the procedures or instructions described in this manual, adjustments should be performed.

3. Cleaning

For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning, proper cleaning should be performed to restore their performances.

4. Shipping mode and shipping screws

To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or the shipping screws should be installed before shipping out in accordance with this manual, if necessary.

5. Lubricants, glues, and replacement parts

Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying

glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed ones should be used.

GM-9027ZT/UC	3

B

C

D

E

F

5		6		7		8

1		2		3		4

A		CONTENTS
			SAFETY INFORMATION............................................	3	7. GENERAL INFORMATION.......................................	33
		1.	SPECIFICATIONS .......................................................	4	7.1 DIAGNOSIS .......................................................	33
		2.	EXPLODED VIEWS AND PARTS LIST ......................	6	7.1.1 DISASSEMBLY.........................................	33
		3.	BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....	8	7.1.2 CONNECTOR FUNCTION DESCRIPTION ......	36
		4.	PCB CONNECTION DIAGRAM	16	7.2 IC	37
		5.	ELECTRICAL PARTS LIST........................................	24	7.3 EXPLANATION...................................................	38
		6.	ADJUSTMENT .........................................................	29	7.3.1 OPERATIONAL FLOW CHART .................	38
					7.3.2 SYSTEM BLOCK DIAGRAM.....................	40
B					8. OPERATIONS ...........................................................	41

1. SPECIFICATIONS

Power source . . . . . . . . . . . . .13.2±0.1V(10.5-16.0V)

Grounding . . . . . . . . . . . . . . . .Negative type

Backup current . . . . . . . . . . . .1.0mA or less

CDimensions(No Bracket) . . . .210mm(W)x60mm(H)x150mm(D) Weight(GM-9027ZT/UC) . . . . .1.985kg

(GM-9027ZT/Q1) . . . . .2.086kg

Maximum output power . . . .24W or more(Front)

24W or more(Rear)

24W or more(Woofer)

D

E

F

4	GM-9027ZT/UC

1		2		3		4

5		6		7		8

A

B

C

D

E

F

GM-9027ZT/UC	5

5		6		7		8

1		2		3		4

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

A

B

C

D

E

F

6	GM-9027ZT/UC

1		2		3		4

5		6		7		8

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.

-For the applying amount of lubricants or glue, follow the instructions in this manual. ( In the case of no amount instructions, apply as you think it appropriate.)

-EXTERIOR SECTION PARTS LIST

Mark No. Description		Part No.		Mark No. Description		Part No.
1	Screw	BMZ30P200FMC	21		Amp Unit	CWM8481
2	Screw(GM-9027ZT/UC)	BMZ50P060FMC	22		Screw	BPZ30P060FSN
3	Screw	BSZ26P060FMC	23		Screw	BSZ26P080FMC
4	Screw	BSZ30P060FMC	24		Connector(CN902)	CKM1308
5	Screw	BSZ30P100FMC	25		Connector(CN901)	CKM1310
6	Chassis	CNA2142	26		Plug(CN906)	CKS4240
7	Case	CNB2563	27		Plug(CN905)	CKS4242
8	Shield Case	CNC8185	28		Holder	CNC8187
9	Shield Case	CNC8186	29		Bracket	CNC8681
10	Bracket(GM-9027ZT/UC)	CNC8919	30		Sheet	CNM7015
11	Bracket(GM-9027ZT/UC)	CNC8920	31		Bracket(GM-9027ZT/Q1)	CND1093
12	Insulator	CNM6145	32		Holder(GM-9027ZT/Q1)	CND1355
13	Seal	CNM6686	33		IC(IC902)	BA178M05T
14	Cushion(GM-9027ZT/UC)	CNM7009	34		IC(IC801)	PAL006A
15	Seal	CNM7170	35		IC(IC802)	PAL006A
16	Seal	CNM7305	36		IC(IC803)	PAL006A
17	Heat Sink	CNR1566	37		Screw(GM-9027ZT/Q1)	BMZ50P060FMC
18	DSP Unit	CWM8480	38		Cushion	CNM7756
19	Socket(CN102)	CKS3632
20	Socket(CN101)	CKS4241

GM-9027ZT/UC	7

A

B

C

D

E

F

5		6		7		8

1		2		3		4

A3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

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)

CK

3

13

13

L901

TC7WU04F

TC7W74FU

3

NJM2068MD 1

10

PAL006A

7

q

(FLM)

BU

7

3

PEE

2

6

4

22

25

Q801

P

SYS4

STBY1 PMUT

CN901

Q831

REAR-L

REAR

B.U

FRONT DAC

FRONT LPF

OPE AMP

POWER AMP

7

(RLM)

B

5 XTI

WFL-

WFL+

IC261

IC311

1

IC702

11

IC802

9

(RLP)

8

AK4321VF

3

NJM2068MD

RLO 11

11

RLIN NJM2068MD 1

10

PAL006A

17

ELECTRONIC

19

SDATA

AOUTL 18

3

6

4

22

25

VOLUME

(TWLM)

(TWLP)

A/D

(256FS)

3

22

Q802

(FDATA)

IN1

IC351

OUT1

SYS4

STBY1 PMUT

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

3

2

NJM2068MD 1

10

PAL006A

SDO1 16 (RDATA)

8

SDATA

AOUTL 18

NJM2068MD

6

4

22

25

Q803

17

15

SYS4

STBY1 PMUT

Q833

OUTPUT

19

18

16

Q950

CONNECTOR

WOOFER DAC

WOOFER LPF

A

SDI0

SDI1

SDO1

5 XTI

IC291

1

(FSW)

IC341

AK4321VF

3

B

(SPD)

DSP

SDO2

15

(WDATA)

8 SDATA

AOUTR AOUTL 18

NJM2068MD

C

INPUT

17

CONNECTOR

IC251

PD2061A

Q291

(SPD)

SPD

AUDIO INPUT

L-

L+

(TWLP)

BUFFER

2

5

5

1

IC501

MUTE

N-MU

7

6

(H/U MUT)

C

6

6

NJM2068MD

ACC

5V REGULATOR

68

VDD

VDD5

3

16 VDD5

Q903

BU1

(TWLM)

CN902

TX+

TMUT

DSPERR

Q915

P

(ML-)

(ML+)

21

PEE

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

RESET

2

NMUT1

NMUT

PD5791B

RESET

9

1

IC131

NAVI/MUTE

12

7

S-80730ANDT

NAVIMUTE 79

22

2

BUS DRIVER

SYSTEM CONTROLLER

AVCIN

6

TXH

15

4

TXP1

23

1

IC141

7

AVCOUT

MUTE

HA12187FP

Q910

20

8

Q912

AVCPW

PMUT

15

D

SPEED

ASLIN1

ASLIN2

SYSPW1

MUTE

1

MUTO

9

10

MUTEO

Q909

Q911

XOUT

XIN

PWSENS

65

FS

5

14

FS

OFFSET SENSE

10

12

74

76

66

Q913

B

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

BU

NJM2068MD

BA178M05T

MIC401

Q401

VR401

1

8V REGULATOR

STBY1

Q906

MIC

3

IC401

8

SYS8

16

3

SYS8

1

IC901

3

NJM2068MD

NJM2930F08K

SYS4

E

Q161

SYSP1

8

11

SYSPW1

SYSPW1

BU

Q907

C

SPD1

10

9

SPD1

SPEED SENSOR PULSE

CN101

CN906

F

8

GM-9027ZT/UC

1

2

3

4

5		6		7		8

A

B

C

D

E

F

GM-9027ZT/UC	9

5		6		7		8

1 2 3 4

3.2 SCHEMATIC DIAGRAM (GUIDE PAGE)

Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST".
A		A-a
		A DSP UNIT
		Large size
A-a	A-b	SCH diagram
A-a	A-b	Guide page
A-a	A-b	Detailed page

B

C

D

-20.2dBs

-14.3dBs

POWER AMP

E

F

	B AMP UNIT
	A B
10	GM-9027ZT/UC

1		2		3		4

5		6		7		8

A-b

A

-20.7dBs

B

-27.9dBs

C

PD5791B

-15.7dBs

MP

NOTE :

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.

GM-9027ZT/UC

D

-11.8dBs

+11.7dBs

E

CD 1kHz -20dB PLAY (VOL:MAX, TONE:FLAT)

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

2.2	←	2R2
0.022		←R022

F

A B

11

5		6		7		8

1

2

3

A-b

1

2

3

A

B

C

A-a A-b

D

E

A DSP UNIT

F

A-a

12	GM-9027ZT/UC

4

PD579

1		2		3		4

5	6	7		8
4	5	6	7	A-b
	POWER AMP			A
				B
	-14.3dBs
				C
				A-b
				A-a
				D
	-20.2dBs
			AMP UNIT	E
			B
				F
				A-a
		GM-9027ZT/UC		13
5	6	7		8