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INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback
is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the   m   button without stopping will
return to the position where recording was started.)

1.

Press  FUNCTION  button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)

2.

Insert a tape into deck B,  press the

  REC PAUSE/START

button,  and then press the  H  button to start recording.

3.

Mode: Record

4.

Mode: Playback

If these levels do not adjustment level, adjust the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3
and 4.

Adjustment level: The playback output of 10 kHz level difference

against 315 Hz reference should be ± 1.0 dB.

Adjustment Location: AUDIO board

INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback
is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the   m   button without stopping will
return to the position where recording was started.)

1.

Press  FUNCTION  button to select VIDEO 1. (This step is
not necessary if the above test mode has already been set.)

2.

Insert a tape into deck B,  press the  REC PAUSE/START
button,  and then press the  H  button to start recording.

3.

Mode: Record

4.

Mode: Playback

5.

Confirm playback the signal recorded in step 2 become
adjustment level as follows.

If these levels do not adjustment level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 3
and 4.

Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

5.

Confirm playback the signal recorded in step 2 become
adjustment level as follows.

Ω

Ω

Adjustment Location:
[AUDIO BOARD] (Conductor Side)

[MAIN BOARD] (Conductor Side)

MAIN board CN301C (Pin 1 : L-CH)

                      (Pin 3 : R-CH)

MAIN board CN301C (Pin 1 : L-CH)

                      (Pin 3 : R-CH)

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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.

Procedure :
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn  ?/1  button on.
5. Load a disc (YEDS-18) and actuate the focus search. (In

consequence of open and close the disc tray, actuate the focus
search)

6. Confirm that the oscilloscope waveform (S-curve) is

symmetrical between A and B. And confirm peak to peak level
within 4 ±1 Vp-p.

7. After check, remove the lead wire connected in step 2 and 3.
Note : • Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the

brightness to obtain best waveform.

Procedure :
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turned  ?/1  button on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal

level is correct or not.

6. After check, remove the lead wire connected in step 2.

±1Vp-p

Note : Clear RF signal waveform means that the shape “ 

◊ ” can be

clearly distinguished at the center of the waveform.

Procedure :
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned  ?/1  button on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the  X  button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope

waveform.

6. After check, remove the lead wire connected in step 1.

[BD BOARD] (Conductor Side)

± 0.3Vp-p

±0.6 Vp-p Symmetry

Specified level: —— 

× 100 = less than – 22 %

B

A

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Note on Printed Wiring Board:
• X : parts extracted from the component side.
•

f

: internal component.

• b : Pattern from the side which enables seeing.

Caution:
Pattern face side:

Parts on the pattern face side seen from

(Side B)

the pattern face are indicated.

Parts face side:

Parts on the parts face side seen from

(Side A)

the parts face are indicated.

Note on Schematic Diagram:
• 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.
• 5 : fusible resistor.
• C : panel designation.

• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M

Ω).

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

• 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

: TUNER (FM/AM)

E

: PLAYBACK (DECK A)

d

: PLAYBACK (DECK B)

G

: RECORD

J

: CD PLAY (ANALOG OUT)

c

: CD PLAY (DIGITAL OUT)

N

: MIC INPUT

• Abbreviation

EA

: Saudi Arabia model.

SP

: Singapore model.

MY

: Malaysia model.

TH

: Thai model.

HK

: Hong Kong model.

CH

: Chinese model.

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

Procedure:
1. Connect the frequency counter to check point of the VIDEO

board.

2. Turned  ?/1  button switch on.
3. Press the  FUNCTION  button to select the CD.
4. Adjust CT503 on the VIDEO board so that the frequency counter

reading 27.0 MHz 

± 80 Hz at stop status.

[VIDEO BOARD] (SIDE A)

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