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16

SHUF

PGM

During continuous playback (CLV: ON)
Tracking servo OFF

STOP (CLV: OFF)
Tracking servo ON
Recording mode OFF

TOC EDIT

TRACK

TIMER
MONO

REC

Recording mode ON

ABCD adjustment completed
Pit
CLV-S
FCS/TRK/AUTO GAIN successful

Groove
CLV-A
FCS successful, TRK unsuccessful

Each time the  DISPLAY  button is pressed, the display changes in the following order.

1. Mode display
Displays “TEMP ADJUST”, “CPLAYMODE”, etc.

2. Error rate display
Displays the error rate in the following way.

C1 = 

 AD = 

C1 = Indicates the C1 error.
AD = Indicates ADER.

3. Address display
The address is displayed as follows. (MO: recordable disc, CD: playback only disc)
Press the REPEAT buttons at the same time to switches between the groove display
and pit display.
h = 

 s = 

 (MO pit and CD)

h = 

 a = 

 (MO groove)

h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.

Note: “–” is displayed when servo is not imposed.

4. Auto gain display (Not used in servicing)
The auto gain is displayed as follows.
AG F = 

 T = 

5. IVR display (Not used in servicing)
The IVR is displayed as follows.
[ 

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Function

Contents

REC/REC MODE

Sets continuous playback when pressed in the STOP state. When pressed during continuous
playback, the tracking servo turns ON/OFF.

u  (MD)

x    (MD)

M

m

DISPLAY

Z    (MD)

When pressed during continuous playback, switches between recording start stop.

Stops continuous playback and continuous recording.

The sled moves to the outer circumference only when this is pressed.

The sled moves to the inner circumference only when this is pressed.

Switches the displayed contents each time the button is pressed

Ejects the disc

Mode display

Error rate display

Address display

Auto gain display 

(Not used in servicing)

IVR display 

(Not used in servicing)

17

TUNER BOARD

C27

C10

R5

JC3

C12

R28

C44

Q3

C45

C43

C51

C5

R7

R4

D2

C6

R2

R3

C7

R32

Q2

Q4

R6

C8

C46

C47

C4

L7

C54

C11

R13

C26

R14

C9

R30

D4

D8

D9

D5

R31

D6

D7

9

JW2

JW7

CT4

JW6

8

D3

L4

L2

JW10

L5

JW5

Q1

FL1

CT3

L3

CT2

JW4

JW3

JW1

+

—

Digital

JW4

(VT)

100K

Ω

voltmeter

RADIO BAND button : MW or LW
Volume : MIN

RADIO BAND button : FM
Volume : MIN

Put the lead-wire
antenna close to
the supplisd MW/LW
loop  antenna.

AM RF signal
generator

30% amplitude modulation by 400Hz
signal.
Output level : as low as possible

telescopic
antenna
terminal

FM RF signal
generator

22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible

0.01 uF

Adjustment Location : Tuner board (See page 18)

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

Adjust for a maximum reading on level meter.

T1

450kHz

Adjust part

Frequency display

 L5

531kHz

Confirmation

1,611kHz

reading on digital

voltmeter.

Adjustment value: 1.0V

Standaed value: 0.7 to 1.3V

5.1  to  5.9V

Adjust for a maximum reading on level meter.

L 3

621kHz

CT2

1,404kHz

Adjust part Frequency display

CT4

 279kHz

Adjustment value: 5.4 to 6.0V

Confirmation

153kHz

 0.4 to 1.1V

reading on digital

voltmeter

Adjust for a maximum reading on level meter.

L 4

162kHz

CT3

261kHz

Adjust part Frequency display

Confirmation

 87.5kHz

1.4 to 2.4V

Confirmation

108kHz

2.7 to 3.7V

reading on digital

voltmeter

Adjust for a maximum reading on level meter.

L6

10.7MHz

Adjust for a maximum reading on level meter.
L1

87.5MHz

CT1

108MHz

47K

Ω

level meter

set

LINE OUT

+

–

(SIDE B)

18

L5 : MW Frequency
       Coverage Adjustment

CT4 : LW Frequency Coverage Adjustment

T1 : AM IF Adjustment

L6 : FM IF Adjustment

L3 : MW Tracking Adjustment

CT2 : MW Tracking Adjustment

CT1 : FM Tracking Adjustment

L4 : LW Tracking Adjustment

CT3 : LW Tracking Adjustment

L1 : FM Tracking Adjustment

[TUNER BOARD] 
(Component side)

19

1. PARTS REPLACEMENT AND ADJUSTMENT
• Check and adjust the mechanism deck as follows.

The procedure changes according to the part replaced.

• Laser power check
• Focus bias check
• C PLAY check
• Self-recording/playback check

Parts Replacement and Repair

NG

Has the OWH been replaced?

NO

OK

NO

NO

NO

Has OP, IC603, IC502, or 
IC504 been replaced?

YES

YES

Initial setting of the adjustment value

Has OP or IC603 been replaced?

YES

IOP information recording
(IOP value labeled on OP)

Has IC603 or D501 
been replaced?

YES

Temperature compensation offset adjustment

• Laser power adjustment
• EF balance adjustment
• Focus bias adjustment
• Error rate adjustment
• Focus bias check
• Auto gain adjustment

Check the sled and spindle 
mechanisms. 
Other causes can be suspected.

• Abbreviation

OP

: Optical pick-up

OWH : Overwrite head