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17

Procedure:
1.

Supply a 98 MHz signal at 28 dB from the ANTENNA terminal.

2.

Tune the set to 98 MHz.

3.

Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.

Adjustment Location: MAIN board

Procedure:
1.

Supply a 98 MHz signal at 60 dB from the ANTENNA terminal.

2.

Tune the set to 98 MHz.

3.

Measure voltage between pin 22 and pin 3 of IC 101.  Adjust
T101 until the voltage becomes 0 V.

Adjustment Location: MAIN board

FM RF Signal generator

75 

Ω

 coaxial

Carrier frequency : 98 MHz
Modulation           : AUDIO 1 kHz, 75 kHz
                              deviation (100%)
Output level          : 30 dB  (at 75 

Ω

 open)

FM ANTENNA terminal
(JK101)

set

FM RF Signal generator

75 

Ω

 coaxial

Carrier frequency : 98 MHz
Modulation           : AUDIO 1 kHz, 75 kHz
                              deviation (100%)
Output level          : 60 dB  (at 75 

Ω

 open)

FM ANTENNA terminal
(JK101)

set

AM RF Signal generator

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

AM ANTENNA terminal
(JK101)

set

Procedure:
1.

Set the frequency of the AM RF signal generator to 1000 kHz
(at 10 kHz step) or 999 kHz (at 9 kHz step).

2.

Tune the set to AM 1000 kHz (at 10 kHz step) or 999 kHz (at 9
kHz step).

3.

Adjust IFT101 so that the reading on level meter becomes in
maximum.

Adjustment Location: MAIN board

headphones jack (JK302)

level meter

set

16 

Ω

T101: NULL

IC101

IFT101: AM IF

SFR101: 
FM TUNED LEVEL

18

CN731

TP731:
TP connected to pin 

q;

 (IC751)

IC751

CN733

IC731

Adjustment Location: CDM board

[CDM BOARD] (Component Side)

Procedure :
1. Connect oscilloscope to pin q; (IC751).
2. Turn the set on.
3. Load a disc (YEDS-18) and play the number five track.
4. Confirm that oscilloscope waveform is clear and check RF signal

level is correct or not.

IC751 pin q; 

Note : Clear RF signal waveform means that the shape “ 

◊ ” can be clearly

distinguished at the center of the waveform.

Note :

1. CD Block is basically designed to operate without adjustment.

Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M

Ω impedance.

4. Clean the object lens by an applicator with neutral detergent

when the signal level is low than specified value with the
following checks.

19

MAIN board 

PANEL board

LCD board

BACK LIGHT board

H/P board

VOL board

SUB TRANSFORMER board 

P-AMP board 

CDM board 

POWER TRANSFORMER board

MOTOR (TRAY) board

MOTOR board

20

Note:
• All capacitors are in 

µF unless otherwise noted.  pF: µµF

50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in 

Ω and 

1

/

4

 

W or less unless otherwise

specified.

•

f

: internal component.

• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.

Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•

a

: Through hole.

•

: Pattern from the side which enables seeing.

• A : B+ Line.
• B : B– Line.

• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

• Voltages are taken with a VOM (Input impedance 10 M

Ω).

Voltage variations may be noted due to normal produc-
tion tolerances.

•

∗

: Impossible to measure

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F

: FM

E

: PB

a

: REC

J

: CD (Analog)

c

: CD (Digital)

• Abbreviation

MX

: Mexican model

KR

: Korea model

TW

: Taiwan model.

Note: The components identified by mark 0 or dotted line

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

C

B

These are omitted.

E

Q

B

These are omitted.

C

E

B

These are omitted.

C

E