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– 21 –

This check is to be done when the optical pick-up block is replaced.

Check Procedure:
1. Connect the oscilloscope to test point TP (VC) and TP (TE) on

MAIN board. Insert disk (YEDS-18).

2. Put the set into test mode.
3. Optical pick-up setting to the center by > or . button

pushing.

4. Press u button.
5. Check that the oscilloscope traverse waveform is symmetrical,

as shown in the figure below.

6. Release test mode after adjustment is completed.

1. Perform the traverse check in the CD test mode.

After check, be sure to exit the test mode.

2. Perform check in the order given.
3. Use the disc (YEDS-18, Parts No. 3-702-101-01) only when so

indicated.

Put the set into test mode and perform the following checks.
Repair if there are any problems.

Press >, . keys and confirm that the Optical pick-up moves
smoothly from the innermost to outermost circumference and back
smoothly and with no catching or abnormal noises.
(Cancellation of BTL mute)
> : Optical pick-up moves to the outer circumference.
. : Optical pick-up moves to the inner circumference.

1. Press the CD u key. (Focus search operation is performed

continuously.)

2. Look at the Optical pick-up objective lens and confirm that it

moves up and down smoothly, with no catching or abnormal
noises.

3. Press x button.

Confirm that focus search operation stops. If it does not, press
x button again longer.

1. Turn the power on.
2. Solder the TEST-C pattern on the TOP board to short.

1. Turn the power off and remove the solder.
2. Turn the power on again.

This check is to be done when the optical block replaced.

Check Procedure:
1. Connect the oscilloscope to test point TP (VC) and TP (RF) on

MAIN board. Insert disk (YEDS-18).

2. Put the set into test mode.
3. Optical pick-up setting to the center by + or – button pushing.
4. Press the u button and press the DISPLAY ENTER button.

(Tracking servo ON)

5. Check that the oscilloscope waveform is as shown in the figure

below (eye pattern).
A good eye pattern means that the diamond shape (    ) in the
center of the waveform can be clearly distinguished.

6. Release test mode after adjustment is completed.

• RF signal reference waveform (eye pattern)

When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.

– 22 –

high focus gain

0 V

100 mV

VOLT/DIV: 100 mV
TIME/DIV: 2 ms

VOLT/DIV: 100 mV
TIME/DIV: 1 ms

100 mV

75 mV

0 V

VOLT/DIV: 0.2 V
TIME/DIV: 2 ms

0 V

VOLT/DIV: 0.2 V
TIME/DIV: 2 ms

0 V

0 V

VOLT/DIV: 0.2 V
TIME/DIV: 2 ms

Gain

Focus

Tracking

Symptoms

Adjustment Location: CD board (Component side)

A frequency response analyzer is necessary in order to perform this
check exactly.
However, this gain has a margin, so even if it is slightly off, there is
no problem.
Focus/Tracking gain determines the pick-up follow-up (vertical and
horizontal) relative to mechanical noise and mechanical shock when
the 2-axis device operate.

• The time until music starts becomes

longer for STOP 

, CD u or

automatic selection (m, M buttons
pressed). (Normally takes about 2
seconds.)

• Music does not start and disc continues

to rotate for STOP 

, CD u or

automatic selection (m, M buttons
pressed).

• Sound is interrupted during PLAY. Or

time counter display stops progressing.

• More noise during 2-axis device

operation.

low

low or high

–––

low

–––

low

high

high

Check Procedure:
1. Keep the set horizontal.
2. Inset disk (YEDS-18) and press u button.
3. Connect an oscilloscope to TP (FE) and TP (VC) on the CD

board.

4. Check that the waveform is as shown in the figure below. (Focus

waveform)

• Good Example

low focus gain

• Incorrect Examples (DC level changes more than on adjusted

waveform)

5. Connect an oscilloscope between TP (TE) and TP (VC).
6. Insert disc (YEDS-18) and press the CD u button.
7. Check that the waveform is as shown in the figure below.

(tracking waveform)

• Incorrect Examples (Fundamental wave appears)

0 V

200 mV

VOLT/DIV: 100 mV
TIME/DIV: 2 ms

low tracking gain

high tracking gain
(high fundamental wave than for low gain)

– 23 –

Adjustment Location: CD board

– 24 –

Pin No.

Pin Name

I/O

Pin Description

1

G2

O

GRID2 signal output

2

G1

O

GRID1 signal output

3

NC

—

Not used. (Fixed at “H”.)

4

C-SCOR

I

SCOR signal input from the IC702 (CXD2587Q)

5

T-CNT (END)

I

T-COUNTER (T-END) signal input

6

REG.CHK

I

P-DOWN IN (B/UP) signal input

7

T-AMS

I

TAPE AMS IN signal input

8

RMC

I

Remote control signal input

9

T-MODE

I

T-MODE SW signal input

10

V-DA/LT

O

Serial data/latch signal output to the IC302 (BD3859FV)

11

R-CE

O

R-CE signal output

12

V-CLK

O

Serial clock signal output to the IC302 (BD3859FV)

13

R-CLK

O

R-CLOCK signal output

14

R-DATA

O

R-DATA signal output

15

R-COUNT

I

R-COUNT signal input

16

C-XLAT

O

Serial latch signal output to the IC702 (CXD2587Q)

17

C-CLK

O

Serial clock signal output to the IC702 (CXD2587Q)

18

C-DATA

O

Serial data signal output to the IC702 (CXD2587Q)

19

C-OPEN.I

I

CD open switch signal input

20

C-CLOSE.I

I

CD close switch signal input

21

C-SCLK

O

SCLK signal output to the IC702 (CXD2587Q)

22

RDS-CLK

I

Serial clock signal input to the IC811 (BU1924F)

23

RDS-DATA

I

Serial data signal input to the IC811 (BU1924F)

24

SD

I

LR signal detector terminal

25

C-SQCK

I

SUBQ clock signal input from the IC702 (CXD2587Q)

26

C-SQSO

I

SUBQ data signal input from the IC702 (CXD2587Q)

27

C-SENS

I

Sens signal input from the IC702 (CXD2587Q)

28

AVREF

—

A/D converter Vref pin

29

KEY1

I

Key signal input 1

30

KEY2

I

Key signal input 2

31

KEY3

I

Key signal input 3

32 – 34

F-CD

I

CD test mode pin

35

T-STAT

I/O

Tape status signal input/output

36

VERSION

I

Version read signal input

37

AVSS

—

Ground

38

RST

I

Reset signal input from the IC802 (PST9128-T)

39

EXTAL

I

Clock oscillation input (8 MHz)

40

X’TAL

O

Clock oscillation output (8 MHz)

41

GND

—

Ground

42

TX

O

Crystal connection for clock oscillation (32.768 kHz)

43

TEX

I

Crystal connection for clock oscillation (32.768 kHz)

44

VDD

—

Power supply pin

45

VFDP

—

Voltage for FDP

46

NC

—

Not used. (Open)

47

C-OPEN.O

O

CD open signal output

48

C-CLS.O

O

CD close signal output

49

SFT-CLK

O

Shift clock signal output

50

C-RST

O

Reset signal output to the IC702 (CXD2587Q)