Pioneer GM-8027 Service manual

ORDER NO.

CRT2889

PUB. NO. CRT2889

AUDIO SYSTEM

POWER AMPLIFIER

Manufactured for TOYOTA by PIONEER CORPORATION

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

GX470

LAND CRUISER PRADO

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

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[ 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:

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.

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.

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.

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.

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.

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

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CONTENTS

SAFETY INFORMATION............................................3

1. SPECIFICATIONS .......................................................4

2. EXPLODED VIEWS AND PARTS LIST ......................6

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....8

4. PCB CONNECTION DIAGRAM................................16

5. ELECTRICAL PARTS LIST........................................25

6. ADJUSTMENT.........................................................31

7. GENERAL INFORMATION.......................................41

7.1 DIAGNOSIS .......................................................41

7.1.1 DISASSEMBLY .........................................41

7.1.2 CONNECTOR FUNCTION DESCRIPTION ......44

7.2 IC ........................................................................45

7.3 EXPLANATION...................................................46

7.3.1 SYSTEM BLOCK DIAGRAM.....................46

7.3.2 OPERATIONAL FLOW CHART .................49

8. OPERATIONS ...........................................................51

1. SPECIFICATIONS

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

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

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)

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2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

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1 Screw BMZ30P200FMC 2 Screw BMZ40P060FZK 3 Screw BMZ50P060FMC 4 Screw BPZ26P080FMC 5 Screw BSZ26P060FMC

6 Screw BSZ30P060FMC 7 Screw BSZ30P100FMC 8 Chassis CNA2142 9 Case CNB2563

10 Shield Case CNC8185

11 Shield Case CNC8186 12 Bracket CNC9778 13 Bracket CNC9779 14 86287-60020 CND1013 15 Insulator CNM6145

16 Seal CNM6686 17 Seal CNM7170 18 Seal CNM7305 19 Seal CNM7745 20 Tape CNM7882

21 Heat Sink CNR1566 22 Cover CNV7037 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

28 Socket(CN101) CKS4241 29 Amp Unit

(GM-8076ZT/WL) CWM8077

Amp Unit

(GM-8076ZT/E) CWM8075

Amp Unit

(GM-8176ZT/WL) CWM8355

Amp Unit

(GM-8176ZT/EW) CWM8352

30 Screw BPZ30P060FSN 31 Screw BSZ26P080FMC 32 Connector(CN902) CKM1308 33 Connector(CN901) CKM1310 34 Plug(CN906) CKS4240

35 Plug(CN905) CKS4242 36 Holder CNC8187 37 Bracket CND1012 38 Sheet CNM7015 39 Microphone Unit CWM8205

40 Connector(CN402) CKS2191 41 Screw ISS26P060FMC 42 IC(IC902) BA178M05T 43 IC(IC801) PAL006A 44 IC(IC802) PAL006A

45 IC(IC803) PAL006A 46 Cushion CNM7756

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.

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3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

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IC251

PD2061A

IC181

AK5351VF

IC261

AK4321VF

IC351

PM0017AM

IC101

IC131

S-80730ANDT

IC902

BA178M05T

IC901

NJM2930F08K

Q904

Q906

Q912

Q909

Q903

5V REGULATOR

8V REGULATOR

SYSTEM

POWER SWITCH

5V REGULATOR

AUDIO INPUT

BUFFER

INPUT

CONNECTOR

OUTPUT

CONNECTOR

IC501

NJM2068MD

IC903

M51957BFP

IC703

NJM2068MD

IC803

PAL006A

SUB WOOFER

POWER AMP

SUB WOOFER

PRE AMP

REAR

POWER AMP

FRONT

POWER AMP

FRONT-L

PRE AMP

REAR-L

PRE AMP

IC701

NJM2068MD

IC702

NJM2068MD

P

PEE

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11

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7

7 9

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1

3

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7 9

2

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1 7

2

6

1

3

1

3

SYS4

BU

BU1

BU

L901

B.U

WFL-

WFL+

IC802

PAL006A

IC801

PAL006A

RL-

RL+

FL+

FL-

CN901

L-

L+

TMUT

MUTE

(H/U MUT)

ACC

Q915

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18

A/D CONVERTER

ACC1

BU1

ASENS

BSENS

Q155

Q151

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16

N-MU

NMUT

Q171

NAVMUTE

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RESET

1

RESET

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2

SYSTEM CONTROLLER

SYSPW1

SYS5SYSD5

1

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17

2

SYSA5

AVDD

DVDD

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3

SYS8

Q161

SYSPW1

66

Q910

Q911

2

4

STBY1

4

25

Q801

Q802

Q803

PMUT

MUTEO

MUTO

1

MUTE

MUTIN

MUTI

Q175

31

SMUTEIN

Q913

PWSENS

65

MUTE /STBY

MUTE

VDD5VDD5

VDD

P

PEE

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8

PEE

21

NMUT1

NAVI/MUTE

ACC SENSE

BACK UP SENSE

SYSTEM MUTE

PEE

SYSP1

CN906

CN101

CN905

CN102

FS

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A

B

CN902

ELECTRONIC

VOLUME

IC401

NJM2068MD

Q401

MIC

MIC401

VR401

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ASLIN2

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1

ASLIN1

74

IC402

NJM2068MD

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7

ASL

8

IC141

HA12187FP

BUS DRIVER

AVCIN

AVCOUT

AVCPW

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23

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2

1

8

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15 4

DSP

10

12

XOUT

XIN

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IC281

AK4321VF

IC291

AK4321VF

IC311

NJM2068MD

IC331

NJM2068MD

IC341

NJM2068MD

FRONT DAC

IC231

TC7WU04F

IC241

TC7W74FU

1

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CRYSTAL

OSCILLATOR

REAR DAC

WOOFER DAC

FRONT LPF

REAR LPF

WOOFER LPF

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19 18

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8

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18

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18

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1

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RLO

RLIN

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FLO

FLIN

18

WFO

WFIN

ML-

ML+

17 19

(TWLP)

(TWLM)

(RLM)

(RLP)

(FLM)

(FLP)

AINL+

AINL-

SDATA

SDI1

SDO1

SDO0

SDO2

SDI0

SDI1

SDO1

SDO2

(FDATA)

(WDATA )

(RDATA)

VCC

8

VCC

8

3

1

2

2 3

5

(256FS)

CK

D

q

XTI

SDATA

AOUTL

XTI

SDATA

AOUTL

XTI

SDATA

AOUTL

IN1

IN3

IN5

OUT3

OUT1

OUT5

(FSW)

Q833

Q832

Q831

10

16

Q950

B

A

DSP UNIT

AMP UNIT

5

19

SDI0

Q291

68

DSPERR

17

AOUTR

6

SYS4

6

SYS4

6

SYS4

22

PMUT

STBY1

22

PMUT

22

PMUT

Q101

(ASL1)

(ASL2)

SPD

(SPD)

C

(SPD)

C

Q907

10

9

SPD1SPD1

SPEED SENSOR PULSE

15

SPEED

VDD

IC201

PD2061A

6 TXH TXP1

TX+

OFFSET SENSE

2

C

MICROPHONE UNIT

GM-8027ZT/E GM-8027ZT/WL

GM-8127ZT/EW GM-8127ZT/WL

: PD5726A

: PD5792A

IC271

AK4321VF

IC321

NJM2068MD

SQUAWKER DAC

SQUAWKER LPF

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18

1

5

XTI

SDATA

AOUTL

(TDATA )

SDO0

17

IC371

SN761029DL

2

ELECTRONIC

VOLUME

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TWLINTWLO

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A-a A-b

A-a

A-b

A-a

Large size

SCH diagram

Guide page

Detailed page

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

A-a

A

B C

POWER AMP

A

DSP UNIT

B

AMP UNIT

C

MICROPHONE UNIT

A/D CONVERTER

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3.2 SCHEMATIC DIAGRAM (GUIDE PAGE)

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A-b

A B

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

2.2 2R2

0.022 R022

←

Symbol indicates a resistor. No differentiation is made between chip resistors and discrete resistors.

NOTE :

Symbol indicates a capacitor. No differentiation is made between chip capacitors and discrete capacitors.

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A-a

A-b A-a

A-a

A-b

1

2

A/D CONVERTER

A

DSP UNIT

C

MICROPHONE UNIT

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A-a

A-b A-a

A-a

A-b

3

4

POWER AMP

B

AMP UNIT

C

MICROPHONE UNIT

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A-a

A-b

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GM-8027ZT/WL

A-a

A-b

3

4

Decimal points for resistor

and capacitor fixed values

are expressed as :

2.2 2R2

0.022 R022

←

Symbol indicates a resistor.

No differentiation is made between chip resistors and

discrete resistors.

NOTE :

Symbol indicates a capacitor.

No differentiation is made between chip capacitors and

discrete capacitors.

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4. PCB CONNECTION DIAGRAM

4.1 DSP UNIT

Capacitor

Connector

P.C.Board

Chip Part

A

DSP UNIT

SIDE B

SIDE A

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

B

CN906

C

CN402

Pioneer GM-8027 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual