Pioneer GM-8027 Service manual

Service

Manual

GX470

ORDER NO.

CRT2889

LAND CRUISER PRADO

AUDIO SYSTEM POWER AMPLIFIER

VEHICLE	DESTINATION	PRODUCED AFTER	TOYOTA PART No.	ID No.					PIONEER MODEL No.
LAND CRUISER PRADO	UK, Ireland	September 2002	86280-60280						GM-8027ZT/WL
LEXUS GX470	U.S.A., Canada	November 2002	86280-60290						GM-8027ZT/E
LAND CRUISER PRADO	Europe	September 2002	86280-60310						GM-8127ZT/EW
LAND CRUISER PRADO	UK, Ireland	September 2002	86280-60300						GM-8127ZT/WL

Manufactured for TOYOTA
by PIONEER CORPORATION	PUB. NO. CRT2889

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A

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

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C

D

E

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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-8027ZT/WL	3

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A		CONTENTS
			SAFETY INFORMATION............................................	3	7. GENERAL INFORMATION.......................................	41
		1.	SPECIFICATIONS .......................................................	4	7.1 DIAGNOSIS .......................................................	41
		2.	EXPLODED VIEWS AND PARTS LIST ......................	6	7.1.1 DISASSEMBLY.........................................	41
		3.	BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....	8	7.1.2 CONNECTOR FUNCTION DESCRIPTION ......	44
		4.	PCB CONNECTION DIAGRAM	16	7.2 IC	45
		5.	ELECTRICAL PARTS LIST........................................	25	7.3 EXPLANATION...................................................	46
		6.	ADJUSTMENT .........................................................	31	7.3.1 SYSTEM BLOCK DIAGRAM.....................	46
					7.3.2 OPERATIONAL FLOW CHART .................	49
B					8. OPERATIONS ...........................................................	51

1. SPECIFICATIONS

			Power source . . . . . . . . .	. . . .13.2±0.1V(10.5-16.0V)
			Grounding . . . . . . . . . . . .	. . . .Negative type
	C		Backup current . . . . . . . .	. . . .1.0mA or less
			Dimensions(No Bracket)	. . . .261.6mm(W)x73mm(H)x183.8mm(D)
			Weight . . . . . . . . . . . . . . . .	. . .2.465kg
			Maximum output power	. . . .22W or more(Front)
				22W or more(Squawker-Front)
				22W or more(Rear)
				22W or more(Woofer)

D

E

F

4	GM-8027ZT/WL

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A

B

C

D

E

F

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2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

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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	28		Socket(CN101)	CKS4241
2	Screw	BMZ40P060FZK	29		Amp Unit(GM-8076ZT/WL)	CWM8077
3	Screw	BMZ50P060FMC			Amp Unit(GM-8076ZT/E)	CWM8075
4	Screw	BPZ26P080FMC			Amp Unit(GM-8176ZT/WL)	CWM8355
5	Screw	BSZ26P060FMC			Amp Unit(GM-8176ZT/EW)	CWM8352
6	Screw	BSZ30P060FMC	30		Screw	BPZ30P060FSN
7	Screw	BSZ30P100FMC	31		Screw	BSZ26P080FMC
8	Chassis	CNA2142	32		Connector(CN902)	CKM1308
9	Case	CNB2563	33		Connector(CN901)	CKM1310
10	Shield Case	CNC8185	34		Plug(CN906)	CKS4240
11	Shield Case	CNC8186	35		Plug(CN905)	CKS4242
12	Bracket	CNC9778	36		Holder	CNC8187
13	Bracket	CNC9779	37		Bracket	CND1012
14	86287-60020	CND1013	38		Sheet	CNM7015
15	Insulator	CNM6145	39		Microphone Unit	CWM8205
16	Seal	CNM6686	40		Connector(CN402)	CKS2191
17	Seal	CNM7170	41		Screw	ISS26P060FMC
18	Seal	CNM7305	42		IC(IC902)	BA178M05T
19	Seal	CNM7745	43		IC(IC801)	PAL006A
20	Tape	CNM7882	44		IC(IC802)	PAL006A
21	Heat Sink	CNR1566	45		IC(IC803)	PAL006A
22	Cover	CNV7037	46		Cushion	CNM7756
23	Cover	CNV7605
24	DSP Unit(GM-8027ZT/WL)	CWM8076
	DSP Unit(GM-8027ZT/E)	CWM8074
	DSP Unit(GM-8127ZT/WL)	CWM8356
	DSP Unit(GM-8127ZT/EW)	CWM8353
25	Cord Assy	CDE6990
26	Connector(CN401)	CKS2191
27	Socket(CN102)	CKS3632

GM-8027ZT/WL	7

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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

FRONT DAC

FRONT LPF

PRE AMP

POWER AMP

2

D 2

9

1

IC231

1 CK

IC241

5 XTI

IC261

FLO

FLIN

IC701

11

IC801

(FLP)

IC311

1

13

13

L901

TC7WU04F

TC7W74FU q 3

8

AK4321VF

3

NJM2068MD

3

NJM2068MD 1

16

PAL006A

7

(FLM)

BU

7

3

SDATA

AOUTL

18

PEE

2

6

4

22

25

Q801

3

P

SYS4

STBY1 PMUT

CN901

REAR DAC

REAR LPF

Q831

5 XTI

IC281

1

IN1

22

REAR-L

REAR

B.U

3

IC331

5

OUT1

8

AK4321VF

NJM2068MD

IN3

PRE AMP

POWER AMP

7

SDATA

AOUTL

18

OUT3

20

(RLM)

WFL-

WFL+

B

(256FS)

ELECTRONIC

RLO

IC702

11

IC802

9

(RLP)

(RDATA)

VOLUME

18

11

11

RLIN NJM2068MD

1

10

PAL006A

17

WOOFER DAC

WOOFER LPF

OUT5

3

6

19

IC351

4

22

15

25

Q802

(TWLM)

(TWLP)

A/D CONVERTER

5 XTI

IC291

IC341

1

PM0017AM

16

3

7 IN5

SYS4

STBY1 PMUT

IC181

DSP

SDO1

8

AK4321VFAOUTL

RL-

RL+

(FDATA)

SDATA

AOUTR

18

NJM2068MD

Q832

AK5351VF

IC201

17

ELECTRONIC

7 AINL-

21

SDI1

6 AINL+

SDATA

PD2061A

VOLUME

FL-

FL+

19 SDI0

(WDATA)

2

IC371

19

TWLO

8

8

TWLIN

SDO0

SDO2

SN761029DL

SUB WOOFER

SUB WOOFER

PRE AMP

POWER AMP

17

15

7

OUTPUT

IC703

11

IC803

WFO

WFIN

9

9

CONNECTOR

9

3 NJM2068MD 1

10

PAL006A

Q803

19

18 16

15

SQUAWKER DAC

SQUAWKER LPF

6

4

22

25

SDI0

SDI1

SDO1

SDO2

5 XTI

IC271

IC321

1

SYS4

Q833

STBY1 PMUT

17

AK4321VF

3

8

NJM2068MD

SDO0

(TDATA)

SDATA

AOUTL

Q950

DSP

18

IC251

(FSW)

PD2061A

Q291

B

5

5

A

(SPD)

INPUT

6

6

AUDIO INPUT

C

CONNECTOR

C

5V REGULATOR

BUFFER

1

2

(SPD)

SPD

Q903

BU1

IC501

68

VDD5

16 VDD5

VDD

3

7 NJM2068MD 6

L-

L+

(TWLP)

DSPERR

P

Q915

MUTE

PEE

21

PEE

11

8

PEE

(H/U MUT)

N-MU

SYSTEM MUTE

ACC

Q175

SMUTEIN

31

MUTI

13

6

MUTIN

(TWLM)

CN902

TX+

ACC SENSE

IC101

ASENS 17

Q155

ACC1

TMUT

SYSTEM CONTROLLER

BACK UP SENSE

6

13

ACC1

ML-

ML+

Q151

BU1

16

BU1

7

12

BSENS

RESET

Q171

GM-8027ZT/E

: PD5726A

2

NMUT1

NMUT

RESET

9

1

IC131

NAVI/MUTE

12

7

GM-8027ZT/WL

S-80730ANDT

GM-8127ZT/EW : PD5792A

NAVMUTE

79

GM-8127ZT/WL

BUS DRIVER

22

2

AVCIN

6

TXH

15

4

TXP1

23

1

IC141

7

AVCOUT

MUTE

HA12187FP

Q910

20

8

Q912

AVCPW

PMUT

D

1

MUTO

MUTEO

ASLIN2

ASLIN1

SYSPW1

SPEED

MUTE

9

10

Q909

Q911

XOUT

XIN

PWSENS

65

FS

5

14

FS

OFFSET SENSE

10

12

76

74

66

15

Q913

B

Q101

(FSW)

MUTE

A

(ASL2)

(ASL1)

/STBY 6

7

IC903

2

M51957BFP

ASL

AVDD

SYSA5

17

2

5V REGULATOR

SYSTEM

7

POWER SWITCH

5

8

SYSD5

18

SYS5

1

IC902

3

Q904

IC402

DVDD

1

BU

NJM2068MD

BA178M05T

VR401

8V REGULATOR

Q401

1

Q906

3

IC401

8

SYS8

16

3

SYS8

1

IC901

3

NJM2068MD

NJM2930F08K

SYS4

4

Q161

E

1

2

SYSP1

8

11

SYSPW1

VDD

SYSPW1

1

2

Q907

C

SPD1

10

9

SPD1

SPEED SENSOR PULSE

MIC

MIC401

C

CN101

CN906

MICROPHONE UNIT

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	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

		Large size
A-a	A-b	SCH diagram
A-a	A-b	Guide page
A-a	A-b	Detailed page

B

A DSP UNIT

A/D CONVERTER

C

	C
	MICROPHONE UNIT
D
			POWER AMP
E
F
A	B AMP UNIT
	B C
10		GM-8027ZT/WL
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5		6		7		8

A-b

	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
	No differentiation is made between chip capacitors and	0.022	←R022
	discrete capacitors.		A B
	GM-8027ZT/WL		11

A

B

C

D

E

F

5		6		7		8

1

2

3

4

A-b

1

2

A

B

C

A-b
A-a
D
AUNITDSP	A/D CONVERTER		C	MICROPHONEUNIT
E
F
A-a
12		GM-8027ZT/WL
1	2	3	4

	5	6	7		8
	3			4	A-b
					A
		POWER AMP
					B
					C
					A-b
					A-a
					D
	MICROPHONE UNIT				E
C				B AMP UNIT
					F
					A-a
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1		2		3		4

A

B

C

A-a A-b

D

E

F

A-b	1		2
14			GM-8027ZT/WL
1		2	3	4

5		6		7

	Decimal points for resistor	and capacitor fixed values	are expressed as :	←2.22R2
	a resistor.	is made between chip resistors and	discrete resistors.	a capacitor.
:	Symbol indicates	No differentiation		Symbol indicates
NOTE

3

GM-8027ZT/WL

5

6

7

8

		A
	←R022
	0.022
	chip capacitors and	B
	between
	No differentiation is made discrete capacitors.
		C
		A-b
		A-a

D

E

F

4 A-b

15

8

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A4. PCB CONNECTION DIAGRAM

4.1 DSP UNIT

NOTE FOR PCB DIAGRAMS

	1.The parts mounted on this PCB	2.Viewpoint of PCB diagrams
	include all necessary parts for	Connector	Capacitor
	several destination.
	For further information for
	respective destinations, be sure
B	to check with the schematic dia-
	gram.
		P.C.Board	Chip Part

A DSP UNIT

SIDE A

SIDE B

B CN906

C

D

E

F

C CN402

A

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