PIONEER LX470, GM-9027ZT Service Manual

ORDER NO.

CRT2883

PUB. NO. CRT2883

AUDIO SYSTEM

POWER AMPLIFIER

Manufactured for TOYOTA by PIONEER CORPORATION

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

LX470

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GM-9027ZT/UC

- GM-9027ZT/UC

- GM-9027ZT/Q1

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

- 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

Contain Box CHL4862 CHL4865

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GM-9027ZT/UC

[ 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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GM-9027ZT/UC

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........................................24

6. ADJUSTMENT.........................................................29

7. GENERAL INFORMATION.......................................33

7.1 DIAGNOSIS .......................................................33

7.1.1 DISASSEMBLY .........................................33

7.1.2 CONNECTOR FUNCTION DESCRIPTION ......36

7.2 IC ........................................................................37

7.3 EXPLANATION...................................................38

7.3.1 OPERATIONAL FLOW CHART .................38

7.3.2 SYSTEM BLOCK DIAGRAM.....................40

8. OPERATIONS ...........................................................41

1. SPECIFICATIONS

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

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

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

Dimensions(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)

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GM-9027ZT/UC

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

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GM-9027ZT/UC

1 Screw BMZ30P200FMC 2 Screw(GM-9027ZT/UC) BMZ50P060FMC 3 Screw BSZ26P060FMC 4 Screw BSZ30P060FMC 5 Screw BSZ30P100FMC

6 Chassis CNA2142 7 Case CNB2563 8 Shield Case CNC8185 9 Shield Case CNC8186

10 Bracket(GM-9027ZT/UC) CNC8919

11 Bracket(GM-9027ZT/UC) CNC8920 12 Insulator CNM6145 13 Seal CNM6686 14 Cushion(GM-9027ZT/UC) CNM7009 15 Seal CNM7170

16 Seal CNM7305 17 Heat Sink CNR1566 18 DSP Unit CWM8480 19 Socket(CN102) CKS3632 20 Socket(CN101) CKS4241

21 Amp Unit CWM8481 22 Screw BPZ30P060FSN 23 Screw BSZ26P080FMC 24 Connector(CN902) CKM1308 25 Connector(CN901) CKM1310

26 Plug(CN906) CKS4240 27 Plug(CN905) CKS4242 28 Holder CNC8187 29 Bracket CNC8681 30 Sheet CNM7015

31 Bracket(GM-9027ZT/Q1) CND1093 32 Holder(GM-9027ZT/Q1) CND1355 33 IC(IC902) BA178M05T 34 IC(IC801) PAL006A 35 IC(IC802) PAL006A

36 IC(IC803) PAL006A 37 Screw(GM-9027ZT/Q1) BMZ50P060FMC 38 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

13

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9

6

13

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3

6

9

8

13

7

16

13

10

11

12

6

7

12

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

OPE AMP

REAR

POWER AMP

FRONT

POWER AMP

FRONT-L

OPE AMP

REAR-L

OPE AMP

IC701

NJM2068MD

IC702

NJM2068MD

P

PEE

3

1

11

9

7

7 9

4

11

1

3

2

1

11

7 9

2

7

6

1 7

2

6

1

3

1

3

SYS4

BU

STBY1

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

6

7

18

A/D

ACC1

BU1

ASENS

BSENS

Q155

Q151

17

16

N-MU

NMUT

Q171

NAVIMUTE

79

RESET

1

RESET

9

2

SYSTEM CONTROLLER

SYSPW1

SYS5SYSD5

1

18

17

2

SYSA5

AVDD

DVDD

16

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

11

8

PEE

21

NMUT1

NAVI/MUTE

ACC SENSE

BACK UP SENSE

SYSTEM MUTE

PEE

SYSP1

CN906

CN101

CN905

CN102

FS

5

14

A

B

CN902

ELECTRONIC

VOLUME

IC401

NJM2068MD

Q401

MIC

MIC401

VR401

3

ASLIN2

76

1

ASLIN1

74

IC402

NJM2068MD

5

7

ASL

8

IC141

HA12187FP

BUS DRIVER

AVCIN

AVCOUT

AVCPW

22

23

20

2

1

8

7

15 4

DSP

10

12

XOUT

XIN

21

IC281

AK4321VF

IC291

AK4321VF

IC311

NJM2068MD

IC331

NJM2068MD

IC341

NJM2068MD

FRONT DAC

IC231

TC7WU04F

IC241

TC7W74FU

1

7

CRYSTAL

OSCILLATOR

REAR DAC

WOOFER DAC

FRONT LPF

REAR LPF

WOOFER LPF

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8

3

18

1

5

17 15

19 18

16

15

8

3

18

3

18

3

1

7

20

RLO

RLIN

22

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

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

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

BU

IC201

PD2061A

6 TXH TXP1

TX+

OFFSET SENSE

PD5791B

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A

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6

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GM-9027ZT/UC

A-aA-a A-b A-b

A-aA-a

A-b A-b

A-a 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

A

DSP UNIT

B

AMP UNIT

P

POWER AMP

-20.2dBs

-14.3dBs

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3.2 SCHEMATIC DIAGRAM (GUIDE PAGE)

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GM-9027ZT/UC

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.

PD5791B

-11.8dBs

-27.9dBs

-20.7dBs

-15.7dBs

+11.7dBs

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

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A-a

A-b A-a

A-a

A-b

1

2 3

A

DSP UNIT

PD579

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GM-9027ZT/UC

A-a

A-b A-a

A-a

A-b

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B

AMP UNIT

POWER AMP

-20.2dBs

-14.3dBs