ORDER NO. CRT2916 GX470 AUDIO SYSTEM HEAD UNIT - HJEMMESIDE

ORDER NO.

CRT2916

GX470AUDIO SYSTEMHEAD UNIT

CRT2916

PUB.NO.

Manufactured for TOYOTA

by PIONEER CORPORATION

VEHICLE DESTINATIONPRODUCED

AFTERTOYOTA PARTS No. ID No.

PIONEER MODEL No.

LEXUS GX470 U.S.A., CANADA November 2002 86120-60440 P1731 KEX-M8727ZT/UCKEX-M8727ZT-91/UC

LEXUS GX470 U.S.A., CANADA November 2002 86120-60470 P1732 KEX-M8527ZT/UCKEX-M8527ZT-91/UC

1 2 3 4

C

D

F

A

B

E

813

4

LER

BU

Q

05

Q

44

AM

PW

IC401

JM2068M

MIXING

MB

AMB

KEX-M8727ZT/UC10

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM3.1 BLOCK DIAGRAM

CN501

ANT

IC561HA12181FP

16 3

9

S-80735ANDZIIC602

2

1

RESET

VDD

Q811Q

Q816

ILLB

FML

CN804

5,613,14

13 15

12RESET

XIN

XO

UT

SYSTEM CONTROL

IC601

KDT,kst

A MAIN UNITFM/AM TUNER UNIT

KEYBOARD UNITB

51

LOC

L

53

PC

E2

33

pc

k

52

PC

E1

93

SL

56

FMS

D

57

st

31,32

PD

O,P

DI

IC 3EEPROM

28

27

FM/AM 1ST IF 10.7MHzT51 Q51 CF51 CF52 CF53

IC1MIXER, IF AMP, DET.

6

21COMP

2225 10 14 12 15 16 8 13 2 4

CF202

VD

D

VC

C

DI/D

O

CE

2

CK

CE

1

SD

BW

SL

FMS

D

NL2

IC 2 FM MPX

AMANT

FMANT

ATT

ATT

AMRF

FMRF

IMG ADJ

RF ADJ

X90110.25MHz

ANT ADJ

LOCL

AMDETMPXREF 41kHz

AM 2ND IF450kHz

1

ST

IND

L ch

9A

MD

ET

17

AM

PN

S

26 RFGND

CN901

KEY MATRIX

ILLUMINATION

2

Q502

AUD+BSW5V

Q4

Q252

55

NL2

Q406

N

RBDSDECODER

TUNER

AM PNS

FML

AML

Q561

A

IC501LA1061M

1

135

6

Q501NIN

MFIX

SUB

MAIN

SUB

MAIN

PD5840A

CN251CN252

CN253CN255

CN256

CN254

IC251HA12216F

TAPE EQUALIZER

MECHANISM DRIVERIC351

PA2020A

Q271

BU

MSUB

MOTOR

MMAINMOTOR

7

+B

TAPE-L

MTL

MTL

VR302

VREF

6

16

111228

37

39

17

5

2

NR

1

ST

BY

LOA

D

LOADSWITCH

MODESENSE

1

4

5

2

1

4

3

20

641

641

C DECK UNIT

D SENSOR UNIT

SWITCH70µs

19

CR

EQ

BU

CN3534

3

20

AUD+B

CSL

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

3

NL1

91

NL1

18LDET

IC252PM4009A

8 20

19 ldet

RC

K,R

DT,

rd

slk

,57K

,dr

st

FWDLcH

REVLcH

1 2 3 4

5 6 7 8

C

D

F

A

B

E

Q816

CN804

5,6

SYSTEM C

IC

KDT,k

6

FMS

D

57

st

Q252

55

Q406

F

PD5

91

NL1

IC25PM40

20

KEX-M8727ZT/UC

Q811Q813

ILLB

NJM2068MDIC204

NJM2068MDIC203

L+

LANL+

L-

ANT

TX+

TX+

TX-

TX-

RSL-RSL+

TX1-

TX1+

LANL

2

5

5

7 5

8

Q808

Q802

ILLACC

HA12187FPIC701

S-81256SGUP-DIMIC870

4

LAM

P

1

SY

SP

WR

ONTROLLER

AVC-LAN601

73

2

SWVDD

AUD+B

AUD+B

AUD+B

ASENS

BSENS

st

6

SY

SM

UT

E1

5

SY

SM

UT

E2

RX

TX

IPPW22

30

29

8 6

1

2

CN801

CN473BU

ISENS

+B

+B

43

FMP

W

TC4052BFIC202

2 TC4052BFIC302

NJM2068MDIC201

BU

7

NJM2068MDIC304

Q205Q204

NJM2068MDIC303

16 8 8

16 82

8

CN472

Q305Q304

Q867Q865

Q866Q864

Q860

Q861

Q862

Q863

BU

BU

3

Q563

Q405

Q564

44

AM

PW

NL2

IC401

NJM2068MD

ACC

Q807

Q870

Q645

Q644

ASEN

ACC

Q805

ISENILL

11SWVDD

100ANTB

5

3 2

75

Q806

BSENBU

BU

BU

VDD

VDD

AMP

AUD+B

SW5V

Q453

Q451

Q452

Q882BU

Q884

AUDIO SELECT FOR AMP

AUDIO SELECT FOR RSA

TUNER MIXING AMP UNBALANCE TO BALANCE

UNBALANCE TO BALANCE

BALANCE TO UNBALANCE

SYSTEM MUTE

SYSTEM MUTE

5R6V IC

16763

7676

ML

AML

6

LANL-

LANL+

LANL-

CSL

TUL

LANL

TUL

CSL

FMBAMB

FMB

AMB

SWVDD

840A

1

1209A

RC

K,R

DT,

rd

slk

,57K

,dr

st

115 6 7 8

1 2 3 4

C

D

F

A

B

E

TUNER

5V

KEXKEX

KEX-M8727ZT/UC12

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

A-a A-b

A-a A-b

A-b A-a

Large sizeSCH 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 CN901

C CN251

RBDS DECODER

FM:-24.0dBs(30%,400Hz)AM:-11.7dBs(30%,400Hz)

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

SYSTEM CONTROLLER

8V

FM DIVERSITY

1 2 3 4

5 6 7 8

C

D

F

A

B

E

A-a A-b

A-a A-b

A-b A-a

KEX-M8727ZT/UC

A-b

A

A MAIN UNIT

Decimal points for resistorand capacitor fixed valuesare expressed as :2.2 2R20.022 R022

← ←

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

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

NOTE :

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

FM:-14.4dBsAM:-14.8dBs(KEX-M8727ZT)

AM:-11.5dBs(KEX-M8527ZT)

TAPE: -7.5dBs

L-

L+(AMP)

SYSTEM MUTE

R+

R-

L-

L+(RSA)


SYSTEM MUTE


AUDIO SELECTOR FOR RSA/RSE

FM:-14.4dBsAM:-14.8dBs(KEX-M8727ZT)AM:-11.5dBs(KEX-M8527ZT)

TAPE: -7.5dBs

VDD 5V

AUDIO SELECTORFOR AMP

BALANCE TO UNBALANCE

TUNER MIXING AMP

HARD MUTE

FM:-4.6dBsAM:-5.0dBs

(KEX-M8727ZT)AM:-1.7dBs

(KEX-M8527ZT)TAPE: +2.3dBs

>

13.2V 13.2V

ILLSENSE

B.UPSENSE

ACCSENSE

13.2V

13.2V

5V

8.3V

5V

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

135 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC14

A-a

A-b

A-a

A-a

A-b 1 2

RB

DS

DE

CO

DE

R

TU

NE

R M

IXIN

G A

MP

FM:-

24.0

dB

s(30

%,4

00H

z)A

M:-

11.7

dB

s(30

%,4

00H

z)

5V

FM D

IVE

RS

ITY

KE

X-M

8727

ZT

KE

X-M

8527

ZT

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

A-a

A-b

A-a

A-a

A-b3 4 5 6 7

BC

N90

1

CC

N25

1TA

PE

:-7.

5dB

s(0d

B,1

kHz)

SYST

EM CO

NTRO

LLER

8V

5V

155 6 7 8

1 2 3 4

C

D

F

A

B

E

HA

RD

MU

TE

KEX-M8727ZT/UC16

A-a

A-b

A-b 1 2

AM

AIN

UN

IT

FM:-

14.4

dB

sA

M:-

14.8

dB

s(K

EX

-M87

27Z

T)

AM

:-11

.5d

Bs

(KE

X-M

8527

ZT

)TA

PE

: -7.

5dB

s

L- L+(A

MP

)

SY

ST

EM

MU

TE

R+ R-

L- L+(R

SA

)

UN

BA

LAN

CE

TO

BA

LAN

CE

SY

ST

EM

MU

TE

UN

BA

LAN

CE

TO

BA

LAN

CE

AU

DIO

S

ELE

CT

OR

FO

R R

SA

/RS

E

FM:-

14.4

dB

sA

M:-

14.8

dB

s(K

EX

-M87

27Z

T)

AM

:-11

.5d

Bs

(KE

X-M

8527

ZT

)TA

PE

: -7.

5dB

s

VD

D 5

V

AU

DIO

SE

LEC

TO

RFO

R A

MP

BA

LAN

CE

TO

UN

BA

LAN

CE

NG

AM

P

5V

R

417,

418

KE

X-M

8727

ZT

91K

KE

X-M

8527

ZT

62K

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

A-a

A-b

A-b3 4 5 6 7

Dec

imal

po

ints

fo

r re

sist

or

and

cap

acit

or

fixe

d v

alu

esar

e ex

pre

ssed

as

:2.

2

2R2

0.02

2

R02

2

←

←

Th

e >

mar

k fo

un

d o

n s

om

e co

mp

on

ent

par

ts in

dic

ates

the

imp

ort

ance

of

the

safe

ty f

acto

r o

f th

e p

art.

Th

eref

ore

, wh

en r

epla

cin

g, b

e su

re t

o u

se p

arts

of

iden

tica

l des

ign

atio

n.

Sym

bo

l in

dic

ates

a r

esis

tor.

No

dif

fere

nti

atio

n is

mad

e b

etw

een

ch

ip r

esis

tors

an

dd

iscr

ete

resi

sto

rs.

NO

TE

: Sym

bo

l in

dic

ates

a c

apac

ito

r.N

o d

iffe

ren

tiat

ion

is m

ade

bet

wee

n c

hip

cap

acit

ors

an

dd

iscr

ete

cap

acit

ors

.

HA

RD

MU

TE

FM:-

4.6d

Bs

AM

:-5.

0dB

s(K

EX

-M87

27Z

T)

AM

:-1.

7dB

s(K

EX

-M85

27Z

T)

TAP

E: +

2.3d

Bs

>

13.2

V13

.2V

ILL

SE

NS

EB

.UP

SE

NS

EA

CC

SE

NS

E

13.2

V

13.2

V

5V

8.3V

5V

175 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC18

3.3 KEYBOARD UNIT

B

PWR•VOL

A CN804

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

B

B KEYBOARD UNIT

8V 8

5mA

8V 8

5mA

8V 8

5mA

8V 8

5mA

8V 8

5mA

8V 8

5mA

195 6 7 8

1 2 3 4

C

D

F

A

B

E

C4

Q2712SC4116

KEX-M8727ZT/UC20

3.4 CASSETTE MECHANISM MODULE

C

DECK UNIT

MU

TE

HA12216F

11121314151617181920

40393837363534333231

30 29 28 27 26 25 24 23 22 21

1 2 3 4 5 6 7 8 9 10

R256

180

R291

0R0

C271

1/50

R283 0R0

R284 0R0

R282 0R0

C253 390P

C254 390P

C252 390P

C251 390P

R281 0R0

R255

180

C25

6

R01

R258

18K

R40

2

3R3K

R403 910

R32

2

0R0

R293

0R0

C272 R1

R28

7

0R0

R28

50R

0

HD1HEAD ASSYEXA1594

TEST TAPENCT-150(400Hz, 200nWb/m)

RL

RR

FR

FL

C30

2

R1

VR302

33K(B)

-8.24dBs(300mV)±1dB

Fwd-R

Fwd-L

Rev-R

Rev-L

NFI(L)

RIN(L)

RIP

FIN(L)

GND

GND

FIN(R)

VREF

RIN(R)

NFI(R)

M-O

UT

(R)

EQ

OU

T(R

)

TA

I(R

)

BIA

S

RA

I(R

)

PB

OU

T(R

)

DE

T(L

)

MU

TE

MSGV(R)

MAOUT

MSI

MSDET

MSGV

F/R

120/70

NR

MO

UT

(L)

EQ

OU

T(L

)

TA

I(L) NC

RA

I(L)

PB

OU

T(L

)

NC

DE

T(L

)

MS

GV

(S)

CN252

CN251

DOLBY B NR

IC251

VR301

33K(B)

C31

0

R1

C30

9

R1

R32

1

0R0

VCC

CCP1280

CCP1280

NC

MSOUT

NC

NC

R260

13K

R26

2

270K

C40

1

3900

P

R40

1

15K

R27

6

100K

C40

2

R33

C404 R01

C40

3

R02

2R

274

0R0

R273

0R0

R27

2

0R0

R292

0R0

R27

1

18K

C30

1

R1

R294

0R0

R259

13K

C25

5

R01

R257

18K

R26

1

270K

A

C

CN353

1 2 3 4

5 6 7 8

C

D

F

A

B

E

0

R32

1R

276

1

C40

3

R02

2R

274

CN353

KEX-M8727ZT/UC

C D

SENSOR UNIT

SWITCHES:SENSOR UNIT S101:LOAD SWITCH..........EJECT-PLAY S102:MODE SWITCH............ON-OFF S103:70µs SWITCH...............ON-OFFThe underlined indicates the switch position.

R275

47K

R35

11K

R35

21K

R35

31K

R35

41K

R373 0R0

R35

5

270K

C35

2

3900

P

R36

230

0

C35

1R

22

C35

3R

01

C35

4R

01

R374 0R0

C356 R01

C355 R1D35

21S

S35

5

M1 MOTOR UNIT(MAIN MOTOR)EXA1618

S101LOAD

ESG1007x3

S102MODE

Q101EGN1004

M2MOTOR UNIT(SUB MOTOR)EXA1623

RS3

RS2

RS1

SC2

SC1

TAB

MC

CE

VCC2

NC

VCC

MCS

RRS

FRS

RSB

C

TAB

MS2

NC

NC

MM

SM1

RSB

GND

RS

mtl

MCS

load

CN255CN253

CN256

CN254

MECHANISMDRIVER

IC35

1

PA

2020

A

0R0

R375 0R0

S10370µs

100K

0R0

R404

270K

C405 R033

R277

220K

R27

810

0K

Q2712SC4116

D

L101

L102

215 6 7 8

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

6. ADJUSTMENT6.1 CONNECTION DIAGRAM

H/U EMV(DENSO)

SDVD(PANA)

NAVI ECU(DENSO)

20P

12P20P 6P 10P 14P 8P

10P18P

20P

18P 10P

6P 10P 14P12P20P

20P

25P

8P

GGD1239

16P

16P

GGD1169

20P

25P

GGD1240

GGD1305

AUI+

AUI-

FR+

FR-

KEX-M8727ZT/UC

RSE-ECU

24P 10P 32P

20P 12P 16P

MCD

32P

Rear Display(F-TEN)

16P

16P

24P

20P

16P

16P

AV Unit

10P 32PGGD1306

CDX-M8027ZT/E

AMP(M/L)

32P

12P

GGD1304

24P12P

Bullet connector(To DC Regulated Power Supply)





Bullet connectorSP Line

1. RSE (option) system

355 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC36

RSA Controller

24P

GGD1239

GGD1169

KEX-M8727ZT/UC

CDX-M8027ZT/E

H/U EMV(DENSO)

32P

12P20P 6P 10P 14P 8P

10P18P

32P

18P 10P

10P 14P12P20P

20P

25P

8P

16P

16P

20P

25P

GGD1240

AUI+AUI-

FR+ FR-

24P

GGD1302

MCD

NAVI ECU(DENSO)

6P

20P

AMP(M/L)





*Please connect only one Multi CD at the same time*MCD does not operate if RSA controller is not connected.

2. RSA (option) system

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

GGD1239

GGD1169

KEX-M8727ZT/UC

CDX-M8027ZT/E

H/U EMV(DENSO)

32P

12P20P 6P 10P 14P 8P

10P18P

18P 10P

10P 14P20P

20P

25P

8P

16P

16P

20P

25P

GGD1240

AUI+AUI-

FR+ FR-

GGD1300

AMP(M/L)

MCD

NAVI ECU(DENSO)

GGD1304

32P

12P

24P

12P






*Please connect only one Multi CD at the same time

3. Standard system

375 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC38


H/U EMV(DENSO)

SDVD(PANA)

NAVI ECU(DENSO)

20P

12P20P 6P 10P 14P 8P

10P18P

20P

18P 10P

6P 10P 14P12P20P

20P

25P

8P

GGD1239

16P

16P

GGD1169

20P

25P

GGD1240

GGD1305

AUI+

AUI-

FR+

FR-

KEX-M8527ZT/UC

GM-8027ZT/E

RSE-ECU

24P 10P 32P

20P 12P 16P

MCD

32P

Rear Display(F-TEN)

16P

16P

24P

20P

16P

16P

AV Unit

10P 32PGGD1306

CDX-M8027ZT/E

AMP

32P

12P

GGD130424P12P







1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

RSA Controller

24P

GGD1239

GGD1169

KEX-M8527ZT/UC

CDX-M8027ZT/E

GM-8027ZT/E

H/U EMV(DENSO)

32P

12P20P 6P 10P 14P 8P

10P18P

32P

18P 10P

10P 14P12P20P

20P

25P

8P

16P

16P

20P

25P

GGD1240

AUI+AUI-

FR+ FR-

24P

GGD1302

AMP

MCD

NAVI ECU(DENSO)

6P

20P

*Please connect only one Multi CD at the same time*MCD does not operate if RSA controller is not connected.





5. RSA (option) system

395 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC40

GGD1239

GGD1169

GGD1304

KEX-M8527ZT/UC

CDX-M8027ZT/E

GM-8027ZT/E

H/U EMV(DENSO)

32P

12P20P 6P 10P 14P 8P

10P18P

32P

18P 10P

10P 14P12P20P

20P

25P

8P

16P

16P

20P

25P

GGD1240

AUI+AUI-

FR+ FR-

GGD1300

AMP

MCD

NAVI ECU(DENSO)

24P

12P






*Please connect only one Multi CD at the same time

6. Standard system

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

6.2 TUNER/AUDIO ADJUSTMENT

DOLBY B NR ADJUSTMENTNo. Test Tape Adjustment Point Adjustment Method

(Switch Position)1 NCT-150 VR301(Lch),VR302(Rch) mV Meter : –8.24dBs(300mV)±1dB

(400Hz,200nwb/m) (DOLBY NR Switch : OFF)

VR302

mVMeter

VR301

L-CHR-CH

Pin2Pin3

CN251

DECK UNIT

Extention Cord GGD1121MAIN UNITCN353

415 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC42

Connection:

Setting of the pulse generator (setting of

superimposed pulse)

Adjustment:

1. Setting of SSG

Percentage modulation : 30%Receiving frequency : 1,000 kHz

Modulation frequency : 400 Hz

Antenna input : 74 dBuV (EMF)

2. Tune a RADIO to the "1,000kHz" with 1' condition.

3. Mix signal with the above-mentioned pulse and

SSG' moduration OFF.

4. Variable resistance adjust noise level to a

minimam.

Adjustment point : VR561 (Main Unit)

Pulse generator(equivalent to HP8011A)

SSG

2-signal pad AM dummy

Output

Noise meter

Pulse width :50usec

Pulse intervals :5msec

Pulse voltage :4Vp-p

4Vp-p(EMF)

50us

5ms

AM NOISE CANCELER ADJUSTMENT

KEX-M8727ZT/UCKEX-M8527ZT/UC

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

6.3 SELF-DIAGNOSTIC FUNCTION

1.To Service Check

1. Press [AUDIO] key of EMV .2. Press [DISPLAY] key of EMV .3. The position of A and B is order of pushed 6 times in A,B,A,B,A and B. ->Service Check screen is displayed.

->As it is, it waits for a while. (In general less than 1 minute)

DISPLAY

Display

Frame of display adjustment

Audio mode

The name of each apparatus, such as an Audio H/U, is displayed.

B

A

2.Service Check

Service Check

EMV Audio H/U

DSP AMP

CD-CH

LAN Monitor

435 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC44

3.How to exit from the diagnostic test mode

The diagnostic result of each model is displayed.Results are [OK], [NCON],[CHEK], and [EXCH].OK : No error codeNCON : EMV has judged it as the thing without connection. (Disconnection being possible if there is actually connection)CHEK : An error code indicating that diagnosis is judged to be necessary is entered.EXCH : An error code indicating that exchange is judged to be necessary is entered.

ACC-OFF

Unit Check Mode Audio H/U

Current Memory

61-40

Occurred Date/Time

When displayed as [CHEK] or [EXCH], details will be displayed if the portion is touched.

It changes on the screen which displays the abnormalities on communication.

The detected abnormalities (Diagnosis code) are displayed. At this example, it is 40 (abnormalities in mechanism or media) of 61 (= cassette).

OK CHEK

OK

NCON

Service Check

EMV Audio H/U

DSP AMP

CD-CH

LAN Monitor

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

Log

ical

ad

dres

s na

me

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ical

ad

dre

ssDi

agno

sis

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iag

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ails

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tu

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Rad

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TV

tu

ner

Cas

sett

e ta

pe

CD

CD

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D-C

H

MD

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60H

40H

61H

43H

62H

63H

64H

65H

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00 01 10 11 12 13 20 21 22 23 24 25 26 27 28 29 2A 30 31 D0

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D2

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D5

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D8

D9

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wit

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WR

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10 11 12 13 14 15 16 40 41 42 43 44 45 41 45 46 47 4A 4B 4C 40 41 40 41 42 43 50 51 52 53 54 55 56 57 10 11 12 13 40 41 10 11 10 40 41

Nav

igat

ion

/GP

S

Ext

end

ed

com

mu

ni

-cat

ion

Info

rmat

ion

disp

lay/

fron

t m

on

ito

rs

58H

80H

02H

32H

34H

Dia

gn

osi

s co

de

tab

le

FM m

ultip

lex

(VIC

S), r

adio

w

ave

beac

on,

beac

on, o

ptic

al

beac

on, F

M

mul

tiple

x (d

ata)

, an

d FM

m

ultip

lex

tune

r

54H

84H

5BH

83H

82H

9AH

Voic

e co

ntr

ol

85H

SW

, Au

dio

S

W, S

W

shif

tin

g,

Co

mm

and

S

W

21H

23H

24H

25H

TE

L E

CU

, T

EL

57H

68H

455 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC46

7. GENERAL INFORMATION7.1 DIAGNOSIS7.1.1 DISASSEMBLY

- Removing the Grille Assy (Fig.1)

Remove the two screws and then removethe Grille Assy.

2

1. Remove the Upper Case.

- Removing the Upper Case (not shown)

Cassette Mechanism Module

Grille Assy Fig.1

1 1

Front Frame

- Removing the Front Frame (Fig.2)

Remove the three screws and then removeethe Front Frame.

1

Fig.2

- Removing the Cassette Mechanism Module (Fig.1)e

Remove the four screws and then removethe Cassette Mechanism Module.

1

1 1

2 2

1 1

1

Fig.3Main Unit

- Removing the Main Unit (Fig.3)

2 Straight the tabs at two locationsindicated.

Remove the two screws and then removethe Main Unit.

3

Remove the two screws.1 11

2

2

3

3

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

7.1.2 CONNECTOR FUNCTION DESCRIPTION

NCTX+TX-(ACC)(BU)

MUTE L- R- R+ SGND

(GND)

L+ NC

NC

TX-

RSA R-RMUTE RSA L+

STSW2 NC

RSA L-

NCSWGND

RSA R+ SGND

NC

NC

NC

NC

STSW1TX+ (SGND)

GND L-

L+ R+

R-

MUTE

NC NC TX-

TX+ NC

NC

(AMP+)

ANT

ILL+ BU

ACCILL-

SUB ANTENNA

MAIN ANTENNA

NC

NC

475 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC48

7.1.3 TROUBLESHOOTING

Is B-UP ON?BSENS terminalPin 75(IC601)

NOCheck +B(Check a power supply.)

YES

Is ACC ON?ASENS terminal

NOTurn on ACC(Check a power supply.)

Pin 73(IC601)

YES

Does illumination come on? NO

Check illumination circuit?ISENS terminal Pin 2(IC601)

YES

Is PWR-ON enabled? NO

Check PWRSW terminalpower Pin 69(IC601)

YES

Is voice output?NO Is amplifier connected

correctly?YES Is any sound of FM, AM and

TAPE (internal sources) output?

NO

Connect amp correctly

YES

Is VOL adjustment enabled? NO Check encoder input.

ENC1- Pin 65(IC601)

YES

Normal operation

NO Check the following terminalsSYSPWR Pin 1(IC601)sysmute2 Pin 5(IC601)sysmute1 Pin 6(IC601)

YES

Are FM and AM sounds output? NO Check the following terminals

FMPW Pin 43(IC601)AMPW Pin 44(IC601)

YES

Is TAPE sound output?NO

Recheck hardware

YES

IsTAPE mechanical unit operated normally?

NO Check the following terminalsCM Pin 89(IC601)SC1 Pin 88(IC601)SC2 Pin 87(IC601)YES

Check the following terminalsSYSPWR Pin1(IC601)

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

7.2 IC

- Pin Functions(PD5840A)Pin No. Pin Name I/O Function and Operation1 SYSPWR O System power control 2 isens I Illumination sense input3 NC Not used4 LAMP Lamp power supply control5,6 SYSMUTE2,1 O System mute output7 RSEMUTE O RSE mute8 BYTE I Vss joint9 CNVSS GND10 LANMUTE O AVC-LAN mute11 SWVDD O SWVDD12 reset I

I

Reset input13 XOUT O Crystal oscillating element connection pin14 VSS GND15 XIN Crystal oscillating element connection pin16 VDD Power supply17 nmi I VDD joint18 rck I RDS clock input19 NC I

ONot used

20 INH2 Selector output for RSE

Selector output for AMP output

21 RX2 BUS22 IPPW O BUS driver power supply output23 SEL2a O Selector change for RSE

Selector change for RSE24 NC Not used

Not used

25 SEL2b I26 INH127 SEL1a O

OSelector change for AMP output

28 SEL1b O Selector change for AMP output29 RX1 BUS30 TX BUS31 PDO O PLL data output32 PDI I Pll data input33 pck O PLL clock output34 ANT1 O Not used 35-40 NC41 ANT0 O Not used42 NC Not used43 FMPW O44 AMPW O AM power output

FM power output

45 NC Not used46 drst O RDS decoder IC reset47,48 NC Not used

I49 RDT RDS data input50 rdslk I RDS LK signal input51 LOCL O Local L output52 PCE1 O PLL chip enable output53 PCE2 O EEPROM chip enable output54,55 NC I Not used56 FMSD I FM signal input57 st

I/OStereo input

58 ROMDT ROM correction data59 ROMCLK O ROM correction clock

495 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC50

Pin No. Pin Name I/O Function and Operation60 ROMCS O ROM correction chip select output61 TEST I Test terminal62 VCC 5V63 ENC1+ I VOL encoder input+64 VSS GND65 ENC1- I VOL encoder input-66–68 KST0-2 O Key strobe69 power I

IPOWER key input

70-72 KDT0-2 Key data input 73 asens I ACC power sense input74 csej I Cassette eject sense input75 bsens I Back up power sense input76 KDT3 I Key data input 77 ENC2+ I AUD encoder input +78 ENC2- I AUD encoder input -79 MS I Music sense input80 fR O

OHead forward/reverse select output

81 PLAY MS gain select output82 mtl I Tape loading detect input83 NR O NR ON/OFF output84 CSLOAD I Tape loading detect input85 POS I Position sense input86 ES I Tape end sense input87 SC2 O Sub motor control output88 SC1 O Sub motor control output89 CM O Capstan motor control output90 stby O Stand-by output 91,92 NC Not used93 SL Signal level94 ILL- Illumination

-95 STSW2 Stearing SW296 AVSS A/D GND97 STSW1 Stearing SW198 VREF A/D converter reference voltage input99 AVCC Analog power supply100 ANTB O Antenna control

30

31

50

51 80

81

100

1

*PD5840A

*S-81256SGUP-DIM

IC's marked by * are MOS type.

Be careful in handling them because they are very liable

to be damaged by electrostatic induction.

REFVOL

1 2 3

GN

D

VIN

VO

UT

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

No. Symbol I/O Explain1 STIND O stereo "Low" when the FM stereo signals are received.

indicator To be pulled up to the "VDD" at 47kΩ.2 FMSD FM station "High" when signals are received. To be pulled up to the "VDD" at 47kΩ

detector Meanwhile, 10kΩ should be used when taking diver FIX trigger from hereand "High: 0.9VDD or more" and "Low: 250mV or less".(Should satisfy the diver IC specifications)

3 NL1 O noise level-1 "High" when noise is received. Output for the RDS. GND at 47kΩ//1,800pF.4 NL2 O noise level-2 "High" when noise is received. Output for the RDS. GND at 36kΩ//330pF.5 Rch O R channel FM stereo "R-ch" signal output or AM audio output.

output Add the specified de-emphasis constant. 6 Lch O L channel FM stereo "L-ch" signal output or AM audio output.

output Add the specified de-emphasis constant. 7 WC write control EEPROM write control. Writing permissible at "Low". Normally open.8 SDBW O SD bandwidth SD bandwidth signal output. For detection of detuning data for the RDS.9 AMDET O AM detector AM detector output. r out < 100Ω

output10 VDD power Power supply pin for the digital section.

supply DC 5V +/- 0.25V. Be careful about overlapping noise in the logic section.11 DGND digital ground Grounding for the digital section.12 CE2 I chip enable-2 EEPROM chip enable. Active a "Low"

To be pulled up to the "VDD" at 47kΩ13 SL I/O signal level Received FM/AM signal level (strength) output.

Connect the specified load resistor and capacitor (10k Ω+ 39k Ω//4,700pF)14 DI/DO I/O data input/ Data input/Data output

data output To be pulled up to the "VDD" at 47kΩ15 CK I clock Clock input To be pulled up to the "VDD" at 47kΩ16 CE1 I chip enable-1 AF·RF chip enable. Active at "High"To be grounded at 47kΩ17 AMPNS AM PNS IF signal IF signal output for AM PNS circuit.18 LDET O lock detector Active at "Low". To be pulled up to the "VDD" at 47kΩ19 CREQ I current request Active at "Low". To be grounded at 47kΩ20 AMINI AM audio input The frequency response and the level are set by connecting an external CR

network with terminal AMIN as terminal AMDET. r in = 50kΩ21 COMP O composite signal FM composite signal output. r out < 100Ω22 VCC power supply Analog section power supply pin.DC 8.4V +/- 0.3V 23 LOCH I local high FM local high pin. When seeking local high, apply 5V together with "LOCL". 24 FMLOCL I FM local low FM local low pin. When seeking local low, apply 5V to the base of the NPN

transistor with which the specified resistor is being connected to the emitter. Keep it open in case of ordinary marketed models.

25 LOCL I local low FM/AM local low pin. When seeking local low, apply 5V to the base of the NPN transistor.Since this pin is exclusive for AM when the FMLOCL is in use,do not drive it under FM.

26 RFGND RF ground Grounding for the antenna section.27 FMANT I FM antenna input FM antenna input. 75Ω. Surge absorber (DSP-201M-S00B) is necessary.28 AMANT I AM antenna input AM antenna input. High impedance.

Connect to the antenna through an L (LAU type) of 4.7µH.To cope with thepower transmission line hums, insert a series circuit consisting of an L(a coil of about 100mH) + R (a resistor of 470 Ω to 2.2kΩ) between the GND.

IC 3EEPROM

28

27

FM/AM 1ST IF 10.7MHzT51 Q51 CF51 CF52 CF53

IC1MIXER, IF AMP, DET.

6

21

18LDET

COMP

2225 10 14 12 15 16 81 32 34

CF202

VD

D

VC

C

DI/D

O

CE

2

CK

CE

1

SD

BW

SL

FMS

D

NL1

NL2

IC 2 FM MPX

AMANT

FMANT

ATT

ATT

AMRF

FMRF

IMG ADJ

RF ADJ

X90110.25MHz

ANT ADJ

LOCL23

LOCH

AMDETMPXREF 41kHz

AM 2ND IF450kHz

19

CR

EQ

11

DG

ND

1

ST

IND

L ch

5R ch

924

AM

DE

T

FMLO

CL

20

177

AM

PN

SW

C

26 RFGND

AMIN

- FM/AM Tuner Unit

O

O

515 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC52

7.3 EXPLANATION7.3.1 SYSTEM BLOCK DIAGRAM

L/R

AV

C-L

AN

RGBL/R AMPLIFIER

PIONEER orOTHER MAKERS

SPEAKER

1. Standard system

1DINHEAD UNIT AVC-LAN

+B, ACC

+B, ACC

AVC-LAN

CD-CH

EMV

OTHER MAKERS

NAVIECU

OTHER MAKERS

AVC-LAN

2. RSA (option) systemL/

R

AV

C-L

AN

RGBL/R AMPLIFIER

PIONEER orOTHER MAKERS

SPEAKER

1DINHEAD UNIT AVC-LAN

+B, ACC

RSA

EMV

OTHER MAKERS

NAVIECU

OTHER MAKERS

AVC-LAN

CD-CH

L/R

AV

C-L

AN

L/R

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

RGB

L/R

NTSC

REARDISPLAY

AMPLIFIERPIONEER or

OTHER MAKERS

SPEAKER

DVD-P

OTHERMAKERS

RSE ECU

OTHERMAKERS

1DINHEAD UNIT

HEADPHONE

OTHERMAKERS


EXTENSIONUNITOTHER

MAKERS

INFRAREDHEAD

PHONE

REMOTECONTROLLER

L/R

L/RL/R

AVC-LAN

AVC-LAN AVC-LAN

+B, ACC

CD-CH

PIONEER

OTHER MAKERS

EMVNAVIECU

OTHER MAKERS

AVC-LAN

AV

C-L

AN

L/R

NT

SC

L/R

L/R

NTSC

L/R

535 6 7 8

1 2 3 4

C

D

F

A

B

E

KEX-M8727ZT/UC54

7.3.2 OPERATIONAL FLOW CHART

VCC=5VPin 62

Power ON

BSENS=L

ASENS=L

YES

VDD=5VPin 16

bsensPin 75

asensPin 73

SYSPWR←HPin 1

IPPW←HPin 22

SWVDD←HPin 11

Source keys operative

Completes power-on operation.(After that, proceed to each source operation)

Source ON

1 2 3 4

5 6 7 8

C

D

F

A

B

E

KEX-M8727ZT/UC

7.4 CLEANING

Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools:

Portions to be cleaned Cleaning tools

Cassette headsPinch rollersCapstans

Cleaning paper : GED-008

555 6 7 8

8. OPERATIONS

-RADIO

MANUAL TUNINGPOWER

ON/OFF,

VOLUME

AM

SEEK

UP/DOWN

FM

-CD,DVD

DISC

SELECT

CD,DVD

DIRECTION

CHANGE

TAPE

AUTO

PROGRAM

SEARCH

TRACK

SELECT

EJECT-TAPE

TRAFFIC INFORMATION

- KEX-M8727ZT/UC, KEX-M8527ZT/UC

POWER

ON/OFF,

VOLUME

POWER

ON/OFF,

VOLUME

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, JapanPIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, BelgiumPIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2002K-ZZS.AUG. 2002 Printed in Japan

ORDER NO. CRT2916 GX470 AUDIO SYSTEM HEAD UNIT - HJEMMESIDE

Documents

Transcript of ORDER NO. CRT2916 GX470 AUDIO SYSTEM HEAD UNIT - HJEMMESIDE