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11

2

belt (CDM55)

B

3

Pull the tray pushing 

B

.

4

two screws
(BTP2.6 

×

 6)

5

MOTOR board

1

Rotate the gear(B) in
the direction of arrow 

A

.

A

2

1

6

3

4

5

7

8

12

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:
1. Turn ON the power.
2. Press three buttons of

x

(TAPE),

x

(CD), and 

[BAND]

 si-

multaneously.

3. The set is reset.

Procedure:
1.

Set to standby state.

2.

Press three buttons of

x

(TAPE),

x

 (CD), and

[TUNING MODE]

 simultaneously.

3.

Liquid crystal display are all turned on.

4.

To exit from this mode, press the

I/1

button to turn the power

OFF.

This mode can be used for operation check of tape deck section.

Procedure:
1.

Set a tape in the tape deck.

2.

Set to standby state.

3.

Press three buttons of

x

(TAPE),

x

 (CD), and 

[TUNING +]

simultaneously.

4.

The aging is executed in bellow sequence.

5.

To exit from the aging mode, press the

I/1

button to turn the

power OFF.

This mode can be used for operation check of CD section.

Procedure:
1.

Load a CD disc.

2.

Set to standby state.

3.

Press three buttons of

x

(TAPE),

x

(CD), and 

[TUNING --]

simultaneously.

4.

The aging is executed in bellow sequence.

5.

To exit from the aging mode, press the

I/1

button to turn the

power OFF.

Procedure:
1.

Set to standby state.

2.

Press the

x

(CD) and the 

[FUNCTION]

  buttons simul-

taneously.
The function changes over to MD or VIDEO by turns.

• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the

I

/

1

button to turn the power ON.

2. Select the function “TUNER”, and press the 

[BAND]

 button

to select the BAND “AM”.

3. Press the

I

/

1

button to turn the power OFF.

4. Change over to 9 kHz:

Press the 

[TUNING --]

 and the

x

(CD) buttons simultaneously.

Change over to 10 kHz:
Press the 

[TUNING +]

 and the

x

(CD) buttons simultaneously.

13

Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.

1.

The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

2.

The adjustments should be performed in the order given in this
service manual.  (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

3.

The adjustments should be performed for both L-CH and R-
CH.

Procedure:
1. Mode: REC

FUNCTION: VIDEO

2. Mode: Playback

3. Confirm playback the signal recorded in step 1 become speci-

fied values as follows.
If these values are out of specification values, adjust the RV101
(L-CH) and RV201 (R-CH) on the TC board to repeat steps
1and 2.

Specified values: Playback output of 315 Hz to playback output

of 10 kHz: 

± 0.5 dB

0 dB=0.775 V







Ω















14

±

s

1.

CD Block is basically constructed to operate without
adjustment.

2.

Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3.

Use an oscilloscope with more than 10 M

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.

5.

Check the focus bias check when optical block is replaced.

Procedure :
1.

Connect oscilloscope to TP (RF) and TP (VC) on the CD board.

2.

Press the

I/1

button to turn the power on, and press the

Z

(CD) button to open the CD disc tray.

3.

Put disc (YEDS-18) in and press the

u

(CD) button to play-

back.

4.

Confirm that 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.