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– 9 –

When the 

p button is pressed, the following will be displayed.

(partial lighting 2)

When the OPEN/CLOSE 

§ button is pressed, all will light up

again.

When the 

≠  AMS ±  knob is rotated, the following

will be displayed. (partial lighting 3)

All buttons have corresponding button numbers. When a button is
pressed, the counter will count up and display the button’s num-
ber. However, the counter will only count to “18”. It will not count
for buttons already pressed once, but will display the button’s num-
ber.

The following checks can be performed in the AF ADJ mode, which
is set by connecting the TP2 (AF ADJ : JW96) terminal on MAIN
board to the Ground and turning on the power.

After all segments light up, when the 

· button is pressed, the

following will be displayed. (Partial lighting 1)

(Partial lighting 3)

(Partial lighting 2)

(Partial lighting 1)

“FILTER-STD/1/2/3” is displayed on the FL tube when the
FILTER switch is pressed.

“REMOCON  PLAY” is displayed on the FL tube when the PLAY
button on the remote commander is pressed.
All go off when the other buttons a pressed.

• Initial setting of digital filter and release of mute.
• When the TP2 (AF ADJ) terminal on MAIN board is set to HIGH

(VDD), emphasis turns on. When set to LOW (GND), it turns
off.

2

4

6

8

10

12

14

16

18

20

Â

Display of counting

Â

Display of button number

Rightward:

Lefrward:

Button

Button Number or Display

LANGUAGE

0

MUSIC SCAN

1

AUTO SPACE

2

PEAK SEARCH

3

PLAY MODE

4

REPEAT

5

FADER

6

TIME/TEXT

7

0

8

)

9

EDIT/TIME FADE

10

CHECK

11

CLEAR

12

P

18

PUSH ENTER

20

OPEN/CLOSE 

§

All lit

PLAY 

·

Partial lighting 1

STOP 

p

Partial lighting 2

≠ AMS ±

Partial lighting 3

– 10 –

The following operations are performed in the ADJ mode, which
is set by connecting the TP1 (ADJ : JW98) terminal to the Ground
and turning on the power.

• During playback, there is no problem even if the GFS is continu-

ously LOW.

• High speed search is prohibited during access.
• During playback, the gain of focus servo and spindle servo does

not decrease.

• Servo related manual operations and measurement can be

performed.
(For details of operations, refer to Table of Key Operrations in
ADJ Mode.)

The spindle servo for playback sets into the CLV-S mode when
the TP2 (AFADJ) terminal is connected to Ground after turning on
the power.

The jitter value display mode can be set after the all-music
remaining number mode using the 

[TIME/TEXT]

 button.

The functions of the number buttons are shown in the following
table.

[ MAIN  BOARD ]  – Conductor Side –

Button

Function

1

Focus bias up

2

Focus bias aliasing (upper, middle, lower) display

3

Focus bias (best point, jitter value) display

4

Tracking servo, sled servo off

5

Tracking gain up

6

Focus bias down

7

Focus bias readjustment

8

Focus bias 00 point

9

Tracking servo, sled servo on

10

Tracking gain normal

11

S-Curve mode (play mode only)

12

Eccentric mode

13

14

Reserved for BD

15

16

17

Tracking gain initialize

18

Offset display (TE), EF, Bias

19

Offset display (VC, FE, RF)

20

Auto gain (FCS, TRK)

CLR key

(Error Rate, RFCK, GFS) selection

IC930

JW096

TP2
(AFADJ)

TP1
(ADJ)

JW098

IC302

CN302

– 11 –

1. How to Enter AGING Mode
Aging method 1
(When using the aging mode remote controller (J-2501-123-A)):
1) Pess the

U button and turn ON the power.

2) Set the disc on the tray.
3) Press the 

[AGING START]

 button of the aging remote control-

ler.

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

fluorescent display tube.

5) To end, press the

U button.

Aging method 2 (When no aging mode remote controller):
1) Turn on the power of the set, and insert any disc.
2) Press three buttons of 

[MUSIC SCAN]

, 

[    ªOPEN/CLOSEº]

,

and

p simultaneously, and the set goes in the AGING mode.

3) Performing the aging for a while, confirm that “ERROR” is not

displayed on the fluorescent display tube.

2. How to Exit from AGING Mode

Turn off the Power, and normal operation becomes ready.

3. Operation sequence in AGING Mode.

*: In case of a failure

A faulty operation mode No. such as “ERROR-3’’ is blinking.

*: During aging, the keys on the set and the remote control A1 are

not accepted.

*: To quit the aging, turn of  the power of the set.

§

Display

Operation

1

AGING-0

loading IN

2

AGING-1

Toc read

3

AGING-2

last access

4

AGING-3

last play

5

AGING-4

first access

6

AGING-5

first play

7

AGING-6

loading OUT

Contents of AGING mode

– 12 –

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

fore, 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 TP2 (FE) on BD board.
2. Connect between test point TP3 (FEI) and TP (VC) by lead wire.
3. Turn ON the power.
4. Put disc (YEDS-18) in and turned Power switch on again and

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

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

between A and B. And confirm peak to peak level within 3±1
Vp-p.

S-curve waveform

6. 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.

Procedure :
1. Connect oscilloscope to test point TP1 (RF) on BD board.
2. Turn ON the power.
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 TP4 (TE) on BD board.
2. Turn ON the power.
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%

Procedure :
1. Connect the test point TP1 (ADJ : JW98) on MAIN board to the

ground with a lead wire on MAIN board.

2. Connect oscilloscpe to test point TP4 (TE) on BD board.
3. Turn ON the power 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.)

A

B

symmetry

within 3 

±

 1 Vp-p

+
–

BD board

TP2 (FE)

TP (VC)

oscilloscope

+
–

BD board

TP1 (RF)

TP (VC)

oscilloscope

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

level: 1.2 

±

0.2 Vp-p

0 V

Center of the waveform

A (DC voltage)

B

symmetry

level: 1.3 

±

 0.6 Vp-p

1 track jump waveform

+
–

BD board

TP4 (TE)

TP (VC)

oscilloscope

(DC range)

+
–

BD board

TP4 (TE)

TP (VC)

oscilloscope

(DC range)