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31

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µ

Pin No.

Pin Name

I/O

Description

1

GENERALDOUT

O

Serial data output to the FM/AM PLL (U2),  LC75392 (U6) and 94HC4094 (U15)

2

GENERALCLK

O

Serial data transfer clock signal output to the FM/AM PLL (U2),  LC75392 (U6) and 94HC4094
(U15)

3

I2CDATA

I/O

Two-way data bus with the EEPROM (IC302)

4

STEREO

I

FM stereo detection signal input from the LA1837 (U1)    “L”: stereo

5

I2CCLK

O

Clock signal output to the EEPROM (IC302)

6

IC

—

Internal connection terminal (connected to ground)

7

X2

O

Main system clock output terminal (4.194304 MHz)

8

X1

I

Main system clock input terminal (4.194304 MHz)

9

VDD

—

Power supply terminal

10

XT1

I

Sub system clock input terminal (32.768 kHz)    Not used (open)

11

XT2

O

Sub system clock output terminal (32.768 kHz)    Not used (open)

12

RESET

I

System reset signal input from the reset signal generator (IC304)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

13

REMOTE

I

Remote control signal input from the remote control receiver (X302)

14

PWRFAIL

I

Power failure detection signal input terminal    “L”: power failure, “H”: power on

15

RDSCLK

I

Serial data transfer clock signal input from the RDS decoder (IC305)
(Used for the AEP, UK models)

16

CDCLK

I

Serial data transfer clock signal input from the CD block

17

SENSORB

I

Tape sensor input terminal    Not used (open)

18

SENSORA

I

Tape play/rec detect sensor input terminal    “L” input when the tape play/rec detect

19

CD DOOR SW

I

CD lid open/close detect switch (SW300) input terminal    “L”: CD lid is closed

20 to 23 CDIN2 to CDIN5

I

Not used (open)

24

AMS

I

Whether a music is present or not from BA335 (U14) is detected at auto music sensor
“L”: music is not present,  “H”: music is present

25

ENCODERA

I

Jog dial pulse input from the rotary encoder (X303 VOLUME) (A phase input)

26

ENCODERB

I

Jog dial pulse input from the rotary encoder (X303 VOLUME) (B phase input)

27

AVSS

—

Ground terminal

28

KEY1

I

Key input terminal (A/D input)    SW301 to SW305 (I/1, TUNER, TAPE, CD, PLAY MODE
RDS/DIR) keys input    (RDS: used for the AEP, UK models)

29

KEY2

I

Key input terminal (A/D input)
SW306 to SW309 (x, X, Y, TUNER MEM ENTER) keys input

30

KEY3

I

Key input terminal (A/D input)    SW310 to SW312 (PRESET +/–, DISPLAY) keys input

31

KEY4

I

Key input terminal (A/D input)
SW313 to SW315 (TUNING – . m, TUNING + M >, MUSIC MENU) keys input

32

KEY5

I

Key input terminal (A/D input)    SW316, SW317 (MEGA BASS, z) keys input

33

ANALYZER

I

Analyzer level detection signal input terminal (A/D input)    Not used (open)

34

TUNED

I

Tuning detection signal input from the LA1837 (U1) (A/D input)    “L”: tuned

35

RDSDATA

I

Serial data input from the RDS decoder (IC305)    (Used for the AEP, UK models)

36

AVDD

—

Power supply terminal

37

AVREF

I

Reference voltage input terminal

38, 39

CDOUT1, CDOUT2

O

Not used (open)

40

VSS

—

Ground terminal

41

CDOUT3

O

Not used (open)

42

CDDATA

I/O

Two-way data bus with the CD block

43

CDRESET

O

Reset signal output to the CD block    “L”: reset

32

Pin No.

Pin Name

I/O

Description

44

STROBE

O

Strobe signal output to the 94HC4094 (U15)    “H” active

45

INPINENA

O

Mega bass on/off selection signal output    “H”: mega bass on

46

DOLBYENA

O

Dolby NR on/off selection signal output terminal    “L”: dolby off,  “H”: dolby on
Not used (open)

47

CE

O

Chip enable signal output to the LC75392 (U6)    “H” active

48

PLLENA

O

PLL chip enable signal output to the FM/AM PLL (U2)    “H” active

49

MUTE

O

Audio line muting on/off control signal output    “H”: muting on

50

POWER

O

System power on/off control signal output    “H”: power on

51 to 54

COM0 to COM3

O

Common drive signal output to the liquid crystal display (CN301)

55

BIAS

O

Bias output for the liquid crystal display drive

56 to 58

VLC0 to VLC2

I

Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage

59

VSS

—

Ground terminal

60 to 89

SEG0 to SEG29

O

Segment drive signal output to the liquid crystal display (CN301)

90

SEG30 (SEL6)

I/O

Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
(AM frequency select switch: used for the except AEP, UK, Chinese models)

91

SEG31 (SEL7)

I/O

Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
(AM frequency select switch: used for the except AEP, UK, Chinese models)

92

SEG32

O

Segment drive signal output to the liquid crystal display (CN301)

93

SEG33

O

Segment drive signal output to the liquid crystal display    Not used (open)

94

SEL10

I

Head position detect switch input terminal    “L”: reverse direction,  “H”: forward direction

95

SEG35

O

Segment drive signal output to the liquid crystal display    Not used (open)

96

SEL12

I

Cassette tape detect switch input terminal    “L”: no cassette,  “H”: cassette in

97

SEG37

O

Segment drive signal output to the liquid crystal display    Not used

98

SEL14

I

Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible,  “H”: protect

99

SEL15

I

Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible,  “H”: protect

100

GENERALDIN

I

Serial data input from the FM/AM PLL (U2)

33

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and accessories are

given in the last of the electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

• Abbreviation

AR

: Argentina model

CH

: Chinese model

CND : Canadian model

Les composants identifiés par une
marque  0 sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.

The components identified by mark

0 or dotted line with mark 0 are
critical for safety.
Replace only with part number
specified.

HK : Hong Kong model
MX : Mexican model
SP

: Singapore model

1

3-451-162-00 WASHER

2

4-235-952-01 AC CORD HOLDER

3

4-236-194-01 EMBLEM BADGE

5

A-4727-039-A MAIN BOARD, COMPLETE (AEP, CH, UK)

5

A-4727-281-A MAIN BOARD, COMPLETE

 (AR, CND, HK, MX, SP, US)

0 6

1-555-750-00 CORD, POWER (AEP, HK, SP, UK)

0 6

1-782-464-21 CORD, POWER (CH)

0 6

1-783-525-31 CORD, POWER (TRACKING) (MX)

0 6

1-783-820-11 CORD, POWER (CND, US)

0 6

1-783-941-51 CORD, POWER (AR)

9

4-236-914-01 REAR CABINET (AEP, CH, UK)

9

4-237-126-01 REAR CABINET (CND, US)

9

4-237-128-01 REAR CABINET (AR, HK, MX, SP)

10

4-235-995-01 RUBBER FOOT

12

A-4727-041-A POWER BOARD, COMPLETE

 (AEP, AR, CH, HK, SP, UK)

12

A-4727-282-A POWER BOARD, COMPLETE (CND, MX, US)

0 T601

1-437-513-11 TRANSFORMER, POWER

 (AEP, AR, CH, HK, SP, UK)

0 T601

1-437-514-11 TRANSFORMER, POWER (CND, MX, US)

34

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

4-237-055-01 VOLUME ROTARY KNOB

53

4-236-900-01 VOL. DECORATION RING

54

4-236-917-01 DISPLAY WINDOW

55

4-236-899-01 DAMPER

56

4-236-067-01 CASS LID WINDOW

57

4-236-903-01 CASS LID

58

4-236-901-01 CASS LID BKT

59

4-236-904-01 CASS LID SPRING

60

4-236-915-01 MAIN PWB MOUNTING BKT (A)

(AEP, AR, CH, HK, MX, SP, UK)

60

4-237-121-01 MAIN PWB MOUNTING BKT (A) (CND, US)

64

1-796-228-11 DECK, MECH (TCM) (CRL3439)

67

4-236-907-01 CASS LID LATCH HOLDER

68

4-236-905-01 CASS LATCH SPRING

69

4-236-906-01 CASS LID LATCH

70

3-709-645-01 BELT SR

71

4-235-777-01 BELT (FR)