Pioneer GX-470 Service manual

ORDER NO.

CRT2916

GX470

AUDIO SYSTEM

HEAD UNIT

VEHICLE DESTINATION

LEXUS GX470 U.S.A., CANADA November 2002 86120-60440 P1731 KEX-M8727ZT/UC

LEXUS GX470 U.S.A., CANADA November 2002 86120-60470 P1732 KEX-M8527ZT/UC

PRODUCED

AFTER

TOYOTA PARTS No. ID No.

PIONEER MODEL

No.

KEX-M8727ZT-91/UC

KEX-M8527ZT-91/UC

Manufactured for TOYOTA

by PIONEER CORPORATION

PUB.NO.

CRT2916

1234

A

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

KEX-M8727ZT/UC (P1731)

B

KEX-M8527ZT/UC (P1732)

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

C

This service manual does not describe the CD test mode. For the operations in the CD test mode, refer to the CD player's Service Manual.

This service manual should be used together with the following manual(s):

Model No. Order No. Mech.Module Remarks

CX-1011 CRT2406 3L Cassette Mech. module: Mech.Description, Disassembly

D

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

Description Part No.

KEX-M8727ZT-91/UC KEX-M8527ZT-91/UC Polyethylene Bag CEG1174 CEG1174 Carton CHG4857 CHG4857 Contain Box CHL4857 CHL4857

* Air Cap CHW1947 CHW1947

E

F

Cover CEG1045(x2) CEG1045(x2)

2

1234

KEX-M8727ZT/UC

5678

[ 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.

A

B

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.

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.

C

D

E

56

KEX-M8727ZT/UC

F

3

7

8

1234

1. SPECIFICATIONS

General

Power source . . . . . . .13.2 V(10.5V—16.0V allowable)

Backup current. . . . . . . . . . . . . . Less than 0.3 mA

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

Weight . . . . . . . . . . . . . . . . . . . . . . . .1.16 kg

T ape player

Tape . . . . . . . . . Compact cassette tape (C-30 - C-90)

Tape speed . . 4.76 cm/sec.(+0.14 cm/sec.,-0.05 cm/sec.)

Wow & ﬂutter. . . . . . . . . . . Less than 0.2 %(WRMS)

Fast forward/rewind time. . . . Less than 110 sec. for C-60

Stereo separation . . . . . . . . . . . . . More than 30 dB

Signal-to-noise ratio . . . . . . . . . . . . More than 40 dB

FM tuner

Frequency range. . . . . . . . . . 87.75,87.9 - 107.9 MHz

Usable sensitivity . . . . .Less than 14 dBµV (S/N: 30 dB)

Signal-to-noise ratio . . . . .More than 46 dB(54dBµ input)

Distortion . . . . . . . . . . . . . . . . . Less than 1.5%

Digital noise . . . . . . Less than 25 mVp-p (74 dBµ input)

AM tuner

Frequency range. . . . . . . . . . . . . . 530 - 1,710 kHz

Usable sensitivity . . . . Less than 34 dBµV(S / N : 20 dB)

Selectivity . . . . . . . . . . . . More than 20 dB (±9 kHz)

Signal-to-noise ratio . . . . More than 42 dB (74 dBµ input)

Distortion . . . . . . . . . . . . . . . . . Less than 1.5%

A

B

C

D

E

F

56

KEX-M8727ZT/UC

7

8

5

1234

2. EXPLODED VIEWS AND PARTS LIST

NOTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.

A

• Screw adjacent to mark on the product are used for disassembly.

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

2.1 EXTERIOR

"

2

B

24

C

33

36

37

38

46

D

49

43

25

44

45

35

31

48

2

47

3

41

38

24

42

20

40

32

37

6

5

24

19

40

34

49

21

14

49

16

15

10

8

17

11

13

12

21

18

22

9

10 10

26

E

43

27

28

49

39

1

29

30

1

4

7

23

1

F

1

6

KEX-M8727ZT/UC

1

1234

5678

EXTERIOR SECTION PARTS LIST

Mark

No. Description Part No.

1 Screw BMZ30P050FMC 2 Screw BSZ26P060FMC 3 Upper Case CNB2757 4 Front Frame CNC9684 5 Earth CND1020

* 6 Cushion CNM5281 7 Insulator CNM7528 8 Main Unit(KEX-M8727ZT) CWM8581 Main Unit(KEX-M8527ZT) CWM8060 9 Screw BMZ30P060FMC

10 Screw(M3x6) CBA1393 11 Connector(CN801) CKM1322 12 Connector(CN473) CKM1350 13 Connector(CN472) CKM1351 14 Plug(CN804) CKS3539

15 Connector(CN353) CKS3568 16 Antenna Jack(CN501) CKX1024 17 Rear Frame CNC9685 18 Holder CNC9686 19 FM/AM Tuner Unit CWE1630

20 Holder CNC8855 21 Terminal(CN802,803) VNF1084 22 Transistor(Q811) 2SB1185 23 Chassis Unit CXB7972 24 Screw BPZ20P080FMC

25 Button(EJECT) CAC7260 26 Button(TRAF) CAC7261 27 Button(AM) CAC7262 28 Button(FM) CAC7263 29 Button(TAPE) CAC7264

30 Button(DISC) CAC7265 31 Button(SEEK,TRACK) CAC7266 32 Button(CH,DISC) CAC7267 33 Rubber CNV6939 34 Lighting Conductor CNV6942

35 Lighting Conductor CNV6943 36 Lighting Conductor CNV6944 37 Lighting Conductor CNV6948 38 Holder CNV6951 39 Holder CNV6952

40 Holder CNV6953 41 Keyboard Unit CWS1337 42 Socket(CN901) CKS3552 43 Knob Unit CXB8817 44 Grille Unit(KEX-M8727ZT) CXB9460

Grille Unit(KEX-M8527ZT) CXB9463 45 Door CAT2291 46 Spring CBH1371 47 Shield Unit CXB9781 48 Cassette Mechanism Module EXK4290

56

No. Description Part No.

Mark

49 Screw ISS26P055FUC

KEX-M8727ZT/UC

A

B

C

D

E

F

7

8

1234

2.2 CASSETTE MECHANISM MODULE

For grease application, refer to the service manual for CX-1011 (CRT2406).

A

B

C

D

E

D

F

8

1234

KEX-M8727ZT/UC

5678

CASSETTE MECHANISM MODULE SECTION PARTS LIST

Mark

No. Description Part No.

1 Screw BSZ20P040FMC 2 Washer CBF1037 3 Washer CBG1003 4 Screw EBA1028 5 Screw CBA1037

6 Spring EBH1653 7 Spring EBH1642 8 Spring EBH1641 9 Spring EBH1626 10 Spring EBH1627

11 Spring EBH1648 12 Cord EDD1024 13 Photo-reﬂector(Q101) EGN1004 14 Arm ENC1526 15 Lever EXA1610

16 Lever ENC1543 17 Arm ENC1532 18 Frame ENC1533 19 Holder ENC1547 20 Gear ENC1535

21 Arm ENC1550 22 Roller ENR1040 23 Belt ENT1027 24 Collar ENV1508 25 Arm ENV1539

26 Arm ENV1540 27 Gear ENV1569 28 Gear ENV1547 29 Gear ENR1044 30 Worm Wheel ENV1559

31 Lever ENV1551 32 Flywheel ENV1554 33 Gathering PCB ENX1073 34 Switch(S101,S102,S103) ESG1007 35 Deck Unit EWM1031

36 Plug(CN251) CKS3540 37 Gathering PCB ENX1066 38 Motor Unit(M1) EXA1618 39 Motor EXM1035 40 Head Assy(HD1) EXA1594

41 Arm ENC1537 42 Screw JGZ20P025FNI 43 Bracket ENC1559 44 Chassis Unit EXA1636 45 Pinch Holder Unit EXA1608

46 Pinch Roller ENV1518 47 Pinch Holder Unit EXA1607 48 Pinch Roller ENV1518 49 Reel Unit EXA1625 50 Head Base Unit EXA1611

56

KEX-M8727ZT/UC

No. Description Part No.

Mark

51 Lever Unit EXA1587 52 Gear Unit EXA1596 53 Motor Unit(M2) EXA1623 54 Washer HBF-179 55 Spring EBH1537

56 Worm Gear ENV1564 57 Spring EBH1655 58 Lever ENC1548 59 Washer YE15FUC 60 Tube ENM1039

61 Spring EBH1645 62 Spring EBH1545 63 Sensor Unit EWM1041

7

A

B

C

D

E

F

9

8

4

Q

M

1234

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

MAIN UNIT

FM/AM TUNER UNIT

CN501

ANT

MAIN

SUB

B

5

SUB

6

MAIN

MFIX

13

IC501

LA1061M

AMANT

28

ATT

FMANT

27 26

RFGND

1

ATT

Q501

NIN

AMRF

ANT ADJ

FMRF

FM/AM 1ST IF 10.7MHz

T51 Q51 CF51

MIXER, IF AMP, DET.

CF202

AM 2ND IF

IMG ADJ

RF ADJ

LOCL

450kHz

AM PNS

16 3

IC561

HA12181FP

CF52 CF53

IC1

10.25MHz

AMPNS

17

MPXREF 41kHz

AMDET

X901

AMDET

VCC

9

222510 14 12 15 16 8 13 2 4

AUD+B

SW5V

9

IC 3

EEPROM

VDD

CREQ

DI/DO

19

CE2CKCE1

Q561

IC 2 FM MPX

SDBWSLFMSD

L ch

6

COMP

21

LDET

18

STIND

NL1

NL2

1

3

FML

RBDS

DECODER

8

Q252

Q406

IC252

PM4009A

TUNER MIXING

FML

2

AML

20

RCK,RDT,rdslk,57K,drst

NJM2068

AMB

Q405

IC401

C

Q502

DECK UNIT

C

CN252

FWD

LcH

REV LcH

1

4

5

D

CN254

M

MAIN

MOTOR

2 1

M

SUB

MOTOR

E

TAPE EQUALIZER

37 39

5

MECHANISM DRIVER

2

CN255

28

VR302

VREF

IC351

PA2020A

1

CN253

HA12216F

12

MODE

SENSE

IC251

11

NR

Q271

17

7

1

CN256

D

CN251

+B

16

6

TAPE-L

MTL

BU

MTL

STBY

LOAD

64

LOAD

70µs

SWITCH

SENSOR UNIT

CN353

4

3

20

AUD+B

CSL

3

BU

20

RESET

VDD

MS,DIR,PLAY,MTL, NR,CSLOAD,POS,ES, SC2,SC1,CM,STBY

IC602

S-80735ANDZI

2

51

19

ldet

12

1

RESET

LOCL

13

PDO,PDI

31,32

XOUT

pck

PCE2

PCE1

53

33

52

XIN

15

KEY MATRIX

ILLUMINATION

st

NL1

NL2

FMSD

93SL56

57

91

55

SYSTEM CONTROLLER

IC601

PD5840A

CN804

KDT,kst

ILLB

Q811

5,613,14

CN901

B

KEYBOARD UNIT

Q816

Q

AMB

AMPW

44

BU

Q813

F

10

KEX-M8727ZT/UC

1234

6

FMSD

5678

A

TUNER MIXING AMP

FML

2

NJM2068MD

AML

Q406

20

IC252

PM4009A

252

RCK,RDT,rdslk,57K,drst

Q405

AMB

st

NL1

NL2

57

91

55

YSTEM CONTROLLER

IC601

PD5840A

AMB

44

IC401

AMPW

FMB

Q563

Q564

4

AUD+B

LAMP

1

43

SYSPWR

TUL CSL

FMB

FMPW

6

SWVDD

ASENS BSENS

AUDIO SELECT

FOR AMP

16 8

2

IC202

1

TC4052BF

5

LANL

AUDIO SELECT

FOR RSA

1

CSL

IC302

2

TUL

TC4052BF

5

LANL

75

SYSMUTE15SYSMUTE2

22

IPPW

30

TX

29

RX

100

ANTB

11

2

ISENS

73

75

16 8 8

BALANCE TO

UNBALANCE

IC201

NJM2068MD

8

BU

Q882

86 1 2

HA12187FP

SW5V

SWVDD

3

6

Q884

IC701

Q645

UNBALANCE TO BALANCE

IC203

NJM2068MD

UNBALANCE TO BALANCE

IC303

NJM2068MD

LANL+

LANL-

5

VDD

Q644

Q805

ISEN

Q807

Q806

ASEN

BSEN

Q453

BU

Q451

ILL

ACC

BU

6763

8

IC204

NJM2068MD

IC304

NJM2068MD

SWVDD

Q863

Q452

AUD+B

7

SYSTEM MUTE

7676

AUD+B

Q867Q865

Q862

SYSTEM MUTE

Q205Q204

Q305Q304

Q866Q864

Q860

Q861

CN801

+B

ILL

AMP

TX+

L+

ANT

TX-

L-

ACC

B

CN472

RSL+

TX1+

TX1-

BU

RSL-

BU

C

CN473

LANL+

LANL-

AVC-LAN

TX+

TX-

ACC

+B

D

N804

5,6

Q816

KDT,kst

ILLB

Q811

Q813

BU

AUD+B

Q808

Q802

BU

VDD

5R6V IC

IC870

S-81256SGUP-DIM

32

Q870

BU

E

F

56

KEX-M8727ZT/UC

7

8

11

X X

1234

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

A

B

C

"ELECTRICAL PARTS LIST".

Large size

A-b

SCH diagram

Guide page

Detailed page

A-a A-b

A-a

FM DIVERSITY

A-a

FM:-24.0dBs(30%,400Hz)

AM:-11.7dBs(30%,400Hz)

RBDS DECODER

KE KE

TUNER

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

5V

D

SYSTEM CONTROLLER

E

CN251

C

TAPE:-7.5dBs(0dB,1kHz)

8V

F

CN901

B

A

12

1234

KEX-M8727ZT/UC

5678

A

A-b

R417,418 KEX-M8727ZT 91K KEX-M8527ZT 62K

TUNER MIXING AMP

FM:-14.4dBs

AM:-14.8dBs

(KEX-M8727ZT)

AM:-11.5dBs

(KEX-M8527ZT)

TAPE: -7.5dBs

VDD 5V

TAPE: -7.5dBs

BALANCE TO UNBALANCE

FM:-14.4dBs AM:-14.8dBs

(KEX-M8727ZT)

AM:-11.5dBs

(KEX-M8527ZT)

AUDIO SELECTOR FOR AMP

AUDIO SELECTOR FOR RSA/RSE

UNBALANCE TO BALANCE

MAIN UNIT

A

SYSTEM MUTE

L-

(AMP)

(RSA)

B

L+

R+

R-

C

L-

L+

5V

HARD MUTE

D

13.2V

>

5V

13.2V

E

13.2V

ILL

SENSE

8.3V

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.

B.UP

SENSE

ACC

SENSE

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

←

2.2 2R2

←

0.022 R022

The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

FM:-4.6dBs

AM:-5.0dBs

(KEX-M8727ZT)

AM:-1.7dBs

(KEX-M8527ZT)

TAPE: +2.3dBs

F

A

56

KEX-M8727ZT/UC

7

8

13

1234

A

A-b

KEX-M8727ZT

KEX-M8527ZT

TUNER MIXING AMP

1

2

5V

B

RBDS DECODER

C

FM:-24.0dBs(30%,400Hz)

AM:-11.7dBs(30%,400Hz)

A-b A-a

A-a

D

E

FM DIVERSITY

F

A-a

14

1234

KEX-M8727ZT/UC

5678

A

3

5V

4

5

6

7

A-b

B

SYSTEM CONTROLLER

C

TAPE:-7.5dBs(0dB,1kHz)

CN251

C

D

8V

A-b A-a

A-a

E

CN901

B

F

56

KEX-M8727ZT/UC

A-a

7

8

15

1234

A

R-

L+

L-

(AMP)

R+

L+

L-

(RSA)

B

SYSTEM MUTE

MAIN UNIT

A

C

A-b A-a

UNBALANCE TO BALANCE

HARD MUTE

D

AUDIO

SELECTOR

AUDIO SELECTOR

FOR AMP

FOR RSA/RSE

E

BALANCE TO UNBALANCE

FM:-14.4dBs

AM:-14.8dBs

AM:-11.5dBs

(KEX-M8727ZT)

(KEX-M8527ZT)

TAPE: -7.5dBs

FM:-14.4dBs

AM:-14.8dBs

AM:-11.5dBs

(KEX-M8727ZT)

(KEX-M8527ZT)

TAPE: -7.5dBs

VDD 5V

F

R417,418

KEX-M8727ZT 91K

KEX-M8527ZT 62K

A-b

16

G AMP

1

2

V

KEX-M8727ZT/UC

1234

5678

A

FM:-4.6dBs

AM:-5.0dBs

AM:-1.7dBs

(KEX-M8527ZT)

(KEX-M8727ZT)

TAPE: +2.3dBs

13.2V

HARD MUTE

>

13.2V

B.UP

SENSE

ILL

ACC

SENSE

B

←

The > mark found on some component parts indicates

the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of

Decimal points for resistor

and capacitor fixed values

are expressed as :

2.2 2R2

0.022 R022

identical designation.

C

A-b A-a

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.

NOTE :

D

13.2V

5V

E

8.3V

F

V

3

4

5

6

KEX-M8727ZT/UC

56

7

A-b

17

8

Pioneer GX-470 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INFORMATION

CONTENTS

1. SPECIFICATIONS

2. EXPLODED VIEWS AND PARTS LIST

2.1 EXTERIOR

2.2 CASSETTE MECHANISM MODULE

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)