Pioneer GM 8437 Schematic

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A. PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936

C PIONEER CORPORATION 2004

K-ZZB. APR. 2004 Printed in Japan

ORDER NO.

CRT3180

POWER AMPLIFIER

GM-8437

ZTWL

TOYOTA

VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No. CROWN Singapore, Hong Kong, December 2004 86280-30470 GM-8473ZT/WL

Thailand, Indonesia

GM-8437ZT/WL

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 (IC802,803) Power Supply IC (IC901,902) DSP IC (IC301,311) Heat Sink IC Holder

- Service Precaution

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.

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GM-8437ZT/WL

CONTENTS

SAFETY INFORMATION............................................2

1. SPECIFICATIONS.......................................................3

2. EXPLODED VIEWS AND PARTS LIST ......................4

2.1 EXTERIOR............................................................4

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ....6

3.1 BLOCK DIAGRAM ...............................................6

3.2 SCHEMATIC DIAGRAM(GUIDE PAGE) ..............8

4. PCB CONNECTION DIAGRAM................................14

4.1 DSP UNIT...........................................................14

4.2 AMP ASSY.........................................................18

4.3 ASL UNIT...........................................................22

5. ELECTRICAL PARTS LIST........................................23

6. ADJUSTMENT.........................................................28

7. GENERAL INFORMATION.......................................30

7.1 DIAGNOSIS .......................................................30

7.1.1 DISASSEMBLY.........................................30

7.1.2 CONNECTOR FUNCTION DESCRIPTION

......32

7.1.3

THE METHOD OF DISTINGUISHING DEFECTIVE

DSP IC(IC301 OR IC311) DURING DSP ERROR .....

33

7.2 IC ........................................................................35

7.3 EXPLANATION...................................................40

7.3.1 SYSTEM BLOCK DIAGRAM.....................40

7.3.2 OPERATIONAL FLOW CHART .................41

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

1. SPECIFICATIONS

Power source . . . . . . . . . . . . .13.2±0.1V(10.5-16.0V) Grounding . . . . . . . . . . . . . . . .Negative type Backup current . . . . . . . . . . . .0.3mA or less Dimensions . . . . . . . . . . . . . . .235mm(W)x51mm(H)x128mm(D) Weight . . . . . . . . . . . . . . . . . . .1348g Maximum output power . . . .22W or more(Front)

11W or more(Center) 22W or more(Rear) 35W or more(Woofer)

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2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

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1 Screw AMZ30P220FTC 2 Screw BSZ26P060FTC 3 Chassis CNA2493 4 Case CNB2743 5 Shield Case CND1276

6 Seal CNM6686 7 Insulator CNM7999 8 Heat Sink CNR1641 9 Amp Assy CWM8256

10 Screw BSZ26P080FTC

11 Screw(M3x6) CBA1393 12 Connector(CN901) CKM1363 13 Connector(CN902) CKM1364 14 Plug(CN905) CKS4569 15 Plug(CN906) CKS4569

16 Connector(CN404) CKS4639 17 Bracket CNC9890 18 Holder CNC9893 19 Holder CND1275 20 Sheet CNM7015

21 DSP Unit CWM8259 22 Socket(CN101) CKS4616 23 Socket(CN102) CKS4616 24 ASL Unit CWM8925 25 Connector(CN403) CKS4605

26 Screw IMS26P060FTC 27 IC(IC802,803) PAL006A 28 IC(IC902) BA178M05T

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

DSP UNIT

A

27

LOUT1

A/D & D/A

32

RIN

IC251

31

LIN

AK4529XQ

XTI

39

DATA,BCK,LRCK

IC62C1024AL-70TI

DACCSN,DACCLK,DACDTI,SMUT,PDN

IC301

AK7706VTA

MCLK2

A0-16 IO0-7

we,oe

IC321

DSP

16

SYSTEM CONTROLLER

LOUT2

LOUT3

ROUT3

MCLK1

8

44

FLMUTE

PD5769B

25

23

(CTR)

24

(WF)

IC311

AK7706VTA

MCLK3

16

VDD5

48

46

RLMUTE

IC101

(FL)

(RL)

47

WFMUTE

TC7WU04F

CTRMUTE

FRONT LPF

2

NJM4580MD

REAR LPF

2

NJM4580MD WOOFER LPF

2 6

NJM4580MD

X271

1

IC271

2

7

IC351

IC361

IC371

EXTERNAL INPUT

CHANGE

1

(FL)

4

TC74HC4066AFT

1

(RL)

4

TC74HC4066AFT

1

(CTR)

IC471

7

5

TC7W66FU

(WF)

8

VDD5

74

21

BEEP

ASLIN

31

SMUTEIN

9

reset

17

asens

16

bsens

20

AVCP W

22

AVCI N

23

AVCOUT

65

PWSENS

IC451

IC461

1

S-80835CNUA-B8U

INPUT CHANGE

2

(BEEP)

(ASL1)

RESET IC186

MUTE FOR EXTERNAL

(FL)

(RL)

(CTR)

(WF)

2

BUS DRIVER

2

IC191

HA12187FP

1

7

5

3

4

VCC

VDD5

8

ELECTRONIC

VOLUME

IN5

IN3

IC551

PM0017AM

IN1

IN2

6V REG.

6 5

OUT5

OUT3

OUT1

OUT2

Q851

VDD

CN102

18

FLO

20

RLO

22

CTRO

21

WFO

SYS801

INT1IN

BEEP

ASL1

LIN RIN

CN101

MUTI

ASEN

BSEN

TXH TXP

TXL TXM

VDD5

13

11

9

10

6

2

1 3

5 4

12

14

3

811 910

FS FS

514

1

40

MUTE

64

calib

36

TELMUTE

XOUT

10 12

X101

XIN

SPEED

15

SYSPW

66

SWITCHED 5V

Q101

VDD5

Q102

MUTO

7

HSW

6

TMUT

2

SYSA5

VA5

VD5

SYS1

17 2

10

11 8

B

CN905

13

11

CTRIN

9

WFIN

10

6

2

1 3

LOUT

5 4

7

5

16

18

MUTEO

12

13

17

TMUTEIN

118

9

C

FLIN

RLIN

SYS8

INT1O

BEEP

ROUT

CN906

MUTIN

ASEN

BSEN

VDD5

HSW

SYS5SYSD5

SYS8

SYS4

SYS1

Q907

SPD1SPD1

AMP ASSY

GAIN ADJ

13

IC701

NJM4580MD

2

BEEP

GAIN ADJ

75

IC751

NJM4580MD

6

SYS4

ASL1

SYSTEM MUTE

VDD5

PMUT

Q601

Q901

BALANCE→UNBALANCE

SYS8

SWDVDD

Q902

Q903

ACC

SYSTEM

Q633

Q634

B

MUTE

5V REGULATOR

IC902

1

BA178M05T

8V REGULATOR

IC901

1

NJM2930F08K

Q908

SWDVDD

SPEED PULSE SENSE

ASL UNIT

POWER AMP

15

IC803

PAL006A

12

4

22

10

STBY1

PMUT

POWER AMP

IC802

PAL006A

10

4

22

PMUT

STBY1

1

IC501

7

NJM4580MD

5

1

IC640

8

NJM4580MD

VOICE INTERRUPTION INPUT DIFFERENTIAL

ACC SENSE

Q922

IC903

3

S-812C56AUA-C3K

µCOM VDD

Q832

23

21

3

5

FSW

2 6

3

Q921

2

14

12

OPERATIONAL AMPLIFIER

MUTE

Q632

3

SYSTEM POWER

SYSPW1

17

19 3

5

Q833

Q803

FSW

(CTR-)

(CTR+)

(WF-)

(WF+)

Q802

Q831

LINP RINP

BACK UP SENSE

BU1

BSENSE

MUTE

Q906

SYS8

CN404

CN403

(RL-)

(RL+)

BU1

Q631

(FLP)

(FLM)

A

(ACC)

SYS8

STBY1

Q904

SWITCHED 5V

SWDVDD

ASL1

34

21

INT1+

MUTE

Q909

TMUT

R+

L+

Q905

BU1

B

Q913

BU1

CONNECTOR

FL-

RL-

WF-

CTR-

TEL MUTE

Q621

CN902

INPUT

CONNECTOR

OUTPUT OFFSET INDICATION

FSW

A

VDD5

OUTPUT

CN901

ACC

SPD

TX+ TX-

FL+

RL+

WF+

CTR+

(SPD)

(TX+)

(TX-)

ASL

Q401

VR401

5

NJM4580MD

IC401

8

3

77

IC402

NJM4580MD

15

MIC401

MIC

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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 C

SIGNAL INPUT

OFF CIRCUIT TO

SUDDEN DECREASE

VOLTAGE

GAIN ADJUSTMENT

BALANCE UNBALANCE

AUDIO INPUT DIFFERENTIAL

OPERATIONAL AMPLIFIER

VOICE INTERRUPTION

INPUT DIFFERENTIAL

OPERATIONAL AMPLIFIER

(BALANCE)

C

ASL UNIT

B

AMP ASSY

CD:-3.5dBs

CD:+8.2dBs (1kHz, 0dB)

CD:+1.7dBs

3.2 SCHEMATIC DIAGRAM (GUIDE PAGE)

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A-b

A B

EXTERNAL INPUT

CHANGE

MUTE FOR

EXTERNAL INPUT CHANGE

SPEED PULSE SENSE

OUTPUT OFFSET INDICATION

OUTPUT OFFSET

INDICATION MUTE

OUTPUT OFFSET

INDICATION

OUTPUT OFFSET

INDICATION

A

DSP UNIT

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.

MAY DAY MUTE

(HELP NET MUTE)

CD:+27.7dBs

CD:-5.87dBs

CD:+2.0dBs

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A-a

A-b A-a

A-a

A-b

C

1

2

C

CD:-3.5dBs

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A

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GM-8437ZT/WL

A-a

A-b A-a

A-a

B

A-a

B

3

4

SIGNAL INPUT

OFF CIRCUIT TO

SUDDEN DECREASE

VOLTAGE

GAIN ADJUSTMENT

BALANCE UNBALANCE

AUDIO INPUT DIFFERENTIAL

OPERATIONAL AMPLIFIER

VOICE INTERRUPTION

INPUT DIFFERENTIAL

OPERATIONAL AMPLIFIER

(BALANCE)

C

ASL UNIT

B

AMP ASSY

CD:+8.2dBs

(1kHz, 0dB)

CD:+1.7dBs

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A

GM-8437ZT/WL

A-a

A-b

1

2

EXTERNAL INPUT

CHANGE

MUTE FOR

EXTERNAL INPUT CHANGE

A

DSP UNIT

CD:-5.87dBs

CD:+2.0dBs

13

5

6

7

8

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E

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C

B

A

5

6

7

8

GM-8437ZT/WL

A-a

A-b

A-a

B

3

4

SPEED PULSE SENSE

OUTPUT OFFSET

INDICATION

OUTPUT OFFSET

INDICATION MUTE

OUTPUT OFFSET

INDICATION

OUTPUT OFFSET

INDICATION

MAY DAY MUTE

(HELP NET MUTE)

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.

CD:+27.7dBs