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– 17 –

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

1. Connect the oscilloscope TP (RF) and TP (VC) on the CD board.
2. Insert the disc (YEDS-18)  in and close the lid for CD.
3. Put the set into test mode. (See page 16.)
4. Press 

+ and = buttons to move the optical pick-up to the

center. (Move the optical pick-up to the music area on the disc
to enable easy visibility of the eye pattern.)

5. Press the 

( button.

From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.

6. Press the 

( button.

[Both tracking and sled are turned ON.]

7. Adjust RV701 so 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.

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

8. Release the test mode after adjustment is completed.

Adjustment Location: CD board (See page 19.)

Gain

Focus

Tracking

Symptoms

• The time until music starts becomes

longer for 

p

→

( on automatic

selection.

low

low or high

(

=, + buttons pressed.)

(Normally takes about 2 seconds.)

• Music does not start and disc

—

low

continues to rotate for 

p

→

( or

automatic selection.
(

=, + buttons pressed.)

• Sound is interrupted during PLAY.

Or time counter display stops

—

low

progressing.

• More noise during 2-axis device

high

high

operation.

A frequency response analyzer is necessary in order to perform this
adjustment exactly.
However, this gain has a margin, so even if it is slightly off, there is
no problem. Therefore, do not perform this adjustment.
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.
However, as these reciprocate, the adjustment is at the point where
both are satisfied.
• When gain is raised, the noise when the 2-axis device operates

increases.

• When gain is lowered, mechanical shock and skipping occurs

more easily.

• When gain adjustment is off, the symptoms below appear.

+
–

CD board

TP (RF)

TP (VC)

oscilloscope

(AC range)

VOLT/DIV : 0.2 V (With the 10:1 probe in use)
TIME/DIV  : 500 ns

1.3 

±

 0.2 Vp-p

– 18 –

The following is a simple adjustment method.

Since exact adjustment cannot be performed, remember the posi-
tions of the controls before performing the adjustment. If the posi-
tions after the primary adjustment are only a little different, return
the controls to the original position.

Procedure:
1. Keep the set horizontal.

If the set is not horizontal, this adjustment cannot be performed
due to the gravity against the 2-axis device.

2. Connect the oscilloscope TP (FOCUS-Y) and TP (VC) on the

CD board.

3. Insert the disc (YEDS-18) in and close the lid for CD.
4. Put the set into test mode. (See page 16.)
5. Press the 

( button.

From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.

6. Press the 

( button.

[Both tracking and sled are turned ON.]

7. Adjust RV702 so that the waveform is as shown in the figure

below. (Focus gain adjustment)

100 mV

0 V

low focus gain

0 V

250 mV

high focus gain

VOLT/DIV: 100 mV
TIME/DIV:2ms

VOLT/DIV: 100 mV
TIME/DIV:2ms

VOLT/DIV: 100 mV
TIME/DIV:2ms

100 mV
75 mV

0 V

• Inconnect Examples (DC level changes more than on adjusted

waveform)

high tracking gain
high fundamental wave
than for low gain

VOLT/DIV: 1 V
TIME/DIV:2 ms

0 V

low tracking gain

VOLT/DIV: 1 V
TIME/DIV: 2ms

0 V

0 V

VOLT/DIV: 1 V
TIME/DIV: 2ms

8. Connect the oscilloscope to TP (TRACKING-Y) and TP (VC)

on the CD board.

9. Adjust RV704 so that the waveform is as shown in the figure

below. (tracking gain adjustment)

• Incorrect Examples (fundamental wave appears)

VOLT/DIV: with the 10:1 probe in used.

10. Release test mode after adjustment is completed.

Adjustment Location: CD board (See page 19.)

+
–

TP (FOCUS-Y)

TP (TRACKING-Y)

TP (VC)

oscillosope
(DC range)

CD board

– 19 –

–CD board (conductor side)–

–CD board (component side)–

TP

(RF)

TP

(FOCUS-Y)

TP

(TRACKING-Y)

TP

(VC)

RF

VC

FOCUS

Y

Y

X

X

TRACKING

IC701

CNP706

CNP701

RV701

FOCUS BIAS

ADJUSTMENT

RV702

FOCUS GAIN

ADJUSTMENT 

RV704

TRACKING GAIN

ADJUSTMENT

RV703

E-F BALANCE

ADJUSTMENT

– 20 –

Pin No.

Pin Name

I/O

Pin Description

1

AC CHK

I

AC check input

2

C-SCOR

I

CD-SCOR input

3

RMC

I

Remote commander input

4

C-XRST

O

CD system reset output

5

C-XLAT

O

CD DSP (IC702) command latch output

6

C-DAT

O

CD DSP (IC702) command data output

7

C-CLK

O

Clock output for CD DSP (IC702) command

8

C-DOOR

I

Open/close detection input (“L”: close, “H”: open)

9

328/332

I

328/332 select input (Fixed at “H”.)

10

C-SENS

I

CD-SENS input

11

C-SQCK

O

Clock output for CD SUB-Q.

12

C-SQSO

I

CD SUB-Q input

13

T-BIAS

I

Tape REC BIAS input

14

—

—

Not used. (Open)

15

T-REC

I

Tape REC input

16

T-SOL

O

Plunger control output

17

T-MODE

O

HEAD switching output

18

T-AMS

I

AMS sensitivity switching

19

T-MCON

O

Motor control output (“H”: Motor ON)

20

P-CON

O

Power on/off control output

21

V-CLK

O

Volume clock output

22

V-DAT

O

Volume data output

23

V-CE

O

Electrical volume (IC302) chip enable output

24

R-ST

I

Stereo detection input

25

R-COUNT

I

Tuner PLL IC count input

26

R-DAT

O

Tuner PLL IC data output

27

R-CLK

O

Tuner PLL IC clock output

28

R-CE

O

Tuner PLL IC chip enable output

29

9K/10K

I

9K/10K select input (Fixed at “H”.)

30

T-STAT

I

Tape detection input

31 – 34

KEY-0 – 3

I

Key return signal input

35

INIT

O

Initial setting output (Not used.)

36

SIMUKE

I

Destination setting terminal (Fixed at “H”.)

37

SFC

O

Shift clock ON/OFF out

38

RST

I

Reset input

39

EXTAL1

I

Clock oscillation input (4.19 MHz)

40

XTAL1

O

Clock oscillation output (4.19 MHz)

41

VSS

—

Ground (for A/D converter)

42

XTAL2

O

Clock oscillation output (Not used.)

43

EXTAL2

I

Clock oscillation output (Fixed at “L”.)

44

AVREF

I

Reference voltage input (for A/D converter)

45

AVSS

—

Ground (for A/D converter)

46

VL

O

LCD bias resistor current control terminal (Cut off at standby)

47 – 49

VLC3 – 1

—

LCD bias power supply terminal

50 – 53

COM0 – 3

O

LCD common signal output terminal

54 – 77

SEG0 – 23

O

LCD segment signal output terminal

78 – 84

NC

—

Not used. (Open)

85 – 87

—

—

Not used. (Open)

88

BL-CONT

O

LCD Back light control output

89

VDD

—

Power supply (+5 V)