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— 17 —

[BD BOARD] — Component Side —

Procedure:
1. Connect test point TP701 (ADJ) on Main board to Ground with a

lead wire.

2. Connect oscilloscpe to test point TP (TEO).
3. Turned Power switch on.
4. Put disc (YEDS-18) in and playback.
5. Confirm that the oscilloscope waveform is symmetrical on the

top and bottom in relation to 0Vdc, and check this level.

Traverse waveform

[MAIN BOARD] — Conductor Side —

IC701

TP701

(ADJ)

oscilloscope

BD board

TP (TEO)
TP (VC)

0V

A

B

level: 300 ± 100 mVp-p

Specified level: •                     x 100 = less than ± 7%

• A + B = 300 ± 100 mVp-p

6. Remove the lead wire connected in step 1.

This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjustment.
Please note that it should be fixed to mechanical center position when
you moved and do not know original position.

A – B

2 (A + B)

RF

RV101

IC101

FOK

RV102

TEO

FEO

TEI

FEI

VC

RV103

IC104

GND

PCK

IC102

— 18 —

BD board

MD board (including 

p

 A)

p

 A

MOTOR board

Note: 

p

A is including in MD board.

TCB board

MAIN board

TRANSFORMER board

PANEL board

HP board

JOG board

POWER AMP board

LOADING board

LEAF SWITCH board

— 67 —

GR7-1

V

DD

LED9, 10

KEY SELECT

VOL IN B

REQ GM

CLK MG

DATA GM

DATA MG

RESET

PANEL SW

LED SELECT

AV

SS

SPEANA IN1-4

KEY IN1-4

AV

DD

AV

REF

JOG IN B

XT2

V

SS

X1

X2

LED8-5

LED4,3

LED2,1

VOL IN A

JOG IN A

RDY MG

SIRCS IN

IC (VPP)

LED12, 13

LED11

V

DD

SEG22-5

V. LOAD

SEG4-1

GR12-8

1 to 7

8

9, 10

11

12

13

14

15

16

17

18

19

20

21 to 24

25 to 28

29

30

31

32

33

34

35

36 to 39

40, 41

42, 43

44

45

46

47

48

49, 50

51

52

53 to 70

71

72 to 75

76 to 80

Fluorescent indicator tube grid signal output.

+5V

LED drive signal output

Not used. (Open)

Volume encoder signal input.

Request signal from/to master control.

Serial clock input.

Serial data output to master control.

Serial data input from master control.

Reset signal input.

CD door open detection input. (Not used) (Open)

LED select signal output.

Ground

Spectram analizer signal input. (Connected to ground)

Key matrix input.

+5V

Jog dial encoder signal input.

Not used. (open)

Ground

O

–

O

O

I

I/O

I

O

I

I

I

O

–

I

I

–

–

I

I

–

I

O

O

O

O

I

I

I

I

–

O

O

–

O

–

O

O

X’tal (5 MHz).

LED drive signal output. (Not used) (open)

LED drive signal output.

Volume encoder signal input.

Jog dial encoder signal input.

Ready signal from master contorl.

SIRCS signal input.

Ground

LED drive signal output.

+5V

Fluorescent indicator tube segment signal output.

–25V for Fluorescent indicator tube.

Fluorescent indicator tube segment signal output.

Fluorescent indicator tube grid signal output.

Pin Name

Pin No.

Function

I/O

— 68 —

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

Ground

X’tal (10 MHz).

Reset signal input.

X’tal for clock (32.768 MHz).

Ground

Back up signal input.

Not used. (Connected to ground)

Mute signal output for tuner.

Sub-code sync signal input.

CD Table sensor signal input. (Not used) (Connected to ground)

RDS data start input. (Not used) (Connected to ground)

RDS data start output. (Not used) (Connected to ground)

Latch signal for digital filter.

Table sence signal input.

Reset signal output for CD.

Ready signal to graphic control.

Test mode input.

Request signal from graphic control.

Clock signal to graphic control.

Data input from graphic control.

Data output to graphic control.

Clock output. Serial bus line.

Test mode input.

Data output. Serial bus line.

Tape detection signal input. (Not used) (Connected to ground)

Not used. (pull up)

Disc table up detect. (Not used) (Connected to ground)

Loading in detection signal input.

Disctray address detect encoder input. (Not used) (Connected to ground)

Loading out detection signal input.

Loading motor control signal output.

Table motor control signal output. (Not used) (Open)

–

O

I

I

O

I

–

I

O

O

I

I

I

I

I

I

I

I

I

I

O

O

O

O

I

I

I

I

O

I

O

O

I

I

O

I

O

O

I

O

V

SS

XOUT

XIN

RESET

XOUT

XIN

GND (test)

AC CUT

SUPER WOOFER ON

ST-MUTE ON

180-A-PLAY

180-B-PLAY

180-B-REC

CLK CHK

UP-SW

IN-SW

ENCODER-0

ENCODER-1

ENCODER-2

OUT SW OPEN

LOAD IN

LOAD OUT

TBL-L

TBL-R

SCOR

TBL-SENS

RDS INT

RDS DATA

DF LAT

SENS

XRST

MG-RDY

ADJ

GM-REQ

MG-CLK

GM-DATA

MG-DATA

CD-CLK

ADJ-2

CD-DATA

Pin No.

Pin Name

Function

I/O