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– 9 –

0

1

2

3

4

5

6

Load in

Access to TOC

Access to last track

Playback of last track

(3 seconds)

Access to first track

Playback of first track

(3 seconds)

Load out

AGING-0

AGING-1

AGING-2

Counter display

AGING-4

Counter display

AGING-6

ERROR-0

ERROR-1

ERROR-2

ERROR-3

ERROR-4

ERROR-5

ERROR-6

Code

No.

State

Display when

normal

Display when

abnormal

This unit is equipped with an aging mode to check operations of the
mechanism deck.
• When faults occur:
Aging stops, and the state when aging stopped is displayed on the
fluorescent display tube.

• When no fault has occurred:
Aging is continued repeatedly.

Aging method 1
(When using the aging mode remote controller (J-2501-123-A)):
1. Press the  1/u  button and turn ON the power.
2. Set the disc on the tray.
3. Press the  AGING START  button of the aging remote controller.
4. Aging starts and the message shown in Fig. 1 is displayed on the

fluorescent display tube.

5. To end, press the  1/u  button.

Aging method 2 (When no aging mode remote controller):
1. Press the  1/u  button and turn ON the power.
2. Set the disc on the tray.
3. Press the  § OPEN/CLOSE  button,  p  button, and  MUSIC

SCAN  button at the same time. (If these buttons are not pressed
at the same time, nothing performs.)

4. Aging starts and the message shown in Fig. 1 is displayed on the

fluorescent display tube.

5. To end, press the  1/u  button.

[ MAIN BOARD ] – Component Side –

JW613 (ADJ)

CN621

JW617 (AFADJ)

– 10 –

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 test point TP (FE) on BD board.
2. Connect the test point JW613 (ADJ) on MAIN board to the

ground with a lead wire.

3. Turn Power switch on.
4. Put disc (YEDS-18) in press  ·  (play) button.
5. When the  11  button of the remote commander is pressed, the S

curve will be output continuously.

6. Check the oscilloscope waveform (S-curve) is symmetrical

between A and B. And confirm peak to peak level within 3
Vp-p.

S-curve waveform

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

• 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.

oscilloscope

BD board

TP (FE)
TP (VC)

+ 1.5
– 1

symmetry

A

B

Within 3        Vp-p

+ 1.5
– 1

oscilloscope

BD board

TP (FE)
TP (VC)

symmetry

A

B

Within 3.8 

±

 1.1 Vp-p

Procedure :
1. Connect oscilloscope to test point TP (FE) on BD board.
2. Connect between test point TP (FEI) and TP (VC) by lead wire.
3. Connect both ends of TP R151 of the BD board to the lead wire.
4. Turn Power switch on.
5. Put disc (YEDS-18) in and actuate the focus search. (actuate the

focus search when disc table is moving in and out.)

6. Check the oscilloscope waveform (S-curve) is symmetrical

between A and B. And confirm peak to peak level within 3.8 ± 1
Vp-p.

7. After check, remove the lead wire connected in step 2 and 3.

• Try to measure several times to make sure than the ratio of A : B

or B : A is more than 10 : 7.

• Take swee p time as long as possible and light up the

brightness to obtain best waveform.

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 1.2 

±

 0.2 Vp-p

oscilloscope

BD board

TP (TE)
TP (VC)

S-curve waveform

oscilloscope

BD board

TP (RF)
TP (VC)

Procedure :
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turn Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Confirm that oscilloscope waveform is clear and check RF sig-

nal level is correct or not.

A clear RF signal waveform means that the shape “

◊

” can be clearly

distinguished at the center of the waveform.

       RF signal waveform

Procedure :
1. Connect oscilloscpe to test point TP (TE) on BD board.
2. Turn Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the  P  (Pause) button. (Becomes the 1 track jump mode)
5. Check the level B of the oscilliscope's waveform and the A (DC

voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%

– 11 –

Procedure :
1. Connect the test point JW613 (ADJ) on MAIN board to the

ground with a lead wire on main board.

2. Connect oscilloscpe to test point TP (TE) on BD board.
3. Turn the Power switch on to set the ADJ mode.
4. Put disc (YEDS-18) in to play the number five track.
5. Press the 

4 button. (The tracking servo and the sledding servo

are turned OFF.)

6. Check the level B of the oscilliscope's waveform and the A (DC

voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%

Traverse waveform

oscilloscope

BD board

TP (TE)
TP (VC)

[ BD BOARD ] – Side A –

[ MAIN BOARD ] – Component Side –

0V

level :  1.3 

±

 0.6 Vp-p

A (DC voltage)

Center of the waveform

B

7. Press the 

9 button. (The tracking servo and sledding servo are

turned ON.) Confirm the C (DC voltage) is almost equal to the
A (DC voltage) is step 6.

Traverse waveform

0V

C (DC 
voltage)

Tracking servo

Sledding servo 

OFF

Tracking servo
Sledding servo
        ON

8. Disconnect the lead wire of JW613 (ADJ) connected in step 1.

CN102

IC101

TP(FEI)

TP(VC)

TP(IOP)

TP(RF)

TP(TE)

TP(FE)

TP

(R151)

0V

level : 1.3       Vp-p

A (DC voltage)

Center of the waveform

B

symmetry

+ 0.7
– 0.6

     1 track jump waveform

JW613 (ADJ)

CN621

JW617 (AFADJ)

– 13 –

– 14 –

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.

• 

¢ 

: internal component.

•

C

: panel designation.

•

U

: B+ Line.

•

V

: B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.
no mark : STOP
( ) : PLAY

• 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.

J 

: CD

c 

: digital out

•

X

: parts extracted from the component side.

•

Y

: parts extracted from the conductor side.

• 

p 

: parts mounted on the conductor side.

• 

® 

: Through hole.

•

b

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

IC101 

#ª

 FE

1

2

3

4

5

IC101 

&¡

 XTAI

IC101 

%º

 RF AC

IC101 

$¡

 TE

IC661 

6

 384FS

6

IC101 

@∞

 MDP

7

IC661 

0

 BCK

IC661 

@¡

 XOUT

8

Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side:

Parts on the parts face side seen from the

(Side A) parts face are indicated.

IC501 

#ª

 EXTAL

9

C

These are omitted

E

B

Q

C

These are omitted

E

B

MAIN board

HP board

DISPLAY board

LOADING board

POWER SW board

BD board

Note: The components identified by mark 

!

 or dotted line

with mark 

!

 are critical for safety.

Replace only with part number specified.

4.5Vp-p

33.87MHz

3.3Vp-p

33MHz

3.9Vp-p

8MHz

3.9Vp-p

33.8MHz

1.2Vp-p

(PLAY)

2.5V

APPROX 500mVp-p (PLAY)

2.5V

APPROX 200m Vp-p (PLAY)

7.5

µ

sec

2.4Vp-p

5Vp-p

2.1MHz