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– 21 –

The display changes according to the following sequence each time the  1/u  button is pressed.

“TEMP ADJUST” and “CPLAYMODE” are displayed.

The error rate is displayed as follows.
C =         AD =   
C = :Indicates the C1 error.
AD = :Indicates ADER.

The address is displayed as follows. (MO: Recordable disc, CD: Disc for palyback only)
When the  CD-MD SYNC  button is pressed, the display will switch between groove
and pit.

h =         s =         (MO pit and CD)
h =         a =         (MO groove)
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.

Note: Displayed as “–” when servo is operated.

The auto gain is displayed as follows.

AG =     /    .   

The detrack is displayed as follows.

ADR =             

IVR is displayed as follows.

[   ][   ][  

Mode display

Error rate display

Address display

Auto gain display (Not used in servicing)

Detrack check display (Not used in servicing)

IVR display (Not used in servicing)

REC

ATT

OVER

SHUFFLE

TRACK

DISC

LEVEL-SYNC

SYNC

When Off

Contents

Display

When Lit

Recording mode ON

ABCD adjustment completed

Tracking offset cancel ON

Focus auto gain OK

Pit

High reflection rate

CLV-S

CLV LOCK

Recording mode OFF

Tracking offset cancel OFF

Groove

Low reflection

CLV-A

CLV UNLOCK

– 22 –

This unit is provided with an aging mode.
In this mode, MD and CD operations are performed alternately according to the following sequence.
Aging will be carried out continuously unless an error occurs.
If an error occurs, the status and number of cycles are displayed alternately, and operations stop. (Refer to Table 1.)

NO

NO

YES

YES

OK?

NO

OK?

NO

NO

YES

OK?

OK?

NO

OK?

NO

OK?

NO

OK?

NO

YES

YES

YES

YES

YES

OK

YES

NG

Start

Turn ON Power using function MD

MD TOC READ

Cannot read

Message 

6

Can read

MD all erase

Above 20

MD last track

Less than 20

Blank disc

Message 

1

CD function is set and CD TOC is read

CD TOC OK?

Message 

7

CD synchro standby

Message 

2

 or 

8

CD last track search pause state

Message 

9

CD synchro starts

Message 

3

 or 

0

Synchro ends?

MD function is set

Playing CD?

CD tray opens

Message 

!¡

Message 

!º

CD tray closes

Message 

!™

MD last track (for 3 sec.) play

Message 

4

Power goes off and MD TOC is written

Aging cycle number is displayed

Power turns ON and MD TOC is read

Message 

5

 or Message 

6

– 23 –

Procedure:
1. Load a recordable disc (MD) and CD test disc (YEDS-18). (*Note 1)
2. While pressing the  PLAY MODE  button, press the  ^ (CD)  button.
3. Aging is executed in the above sequence.
4. To end, press the  p (CD or MD)  button.
*Note 1: Any CD can be used, but one with a short last track is recommended. The time of one aging cycle will be longer if the last track is

long.
Also use a CD in which the length of the last track x 20 does not exceed the recording time of the recording MD.

A disc for playback only was used. The rec-proof tab is set to

protect. Disc error, etc.

Disc is full, etc.

Access error, etc.

No. of total tracks does not match logic value.

Disc error, etc.

Optical defect, spindle defect (including motor), cannot read

Q data, disc defect (scratches, etc.), bad focus, bad GFS, etc.

Disc defect (scratches, etc.), cannot read Q data, etc.

Optical defect, sled, tracking defect (including motor), cannot

read Q data, disc defect (scratches, etc.).

Optical defect, cannot read Q data, disc defect (scratches, etc.),

etc.

LOAD OUT SW defect

LOAD IN SW defect

No

Error Messages

Details of Error

1

2
3
4
5
6
7

8

9

0

!¡
!™

MD A Erase NG

MD R-Pause NG

MD D-input NG

MD Play NG

MD TOC NG

MD No Disc NG

CD No Disc NG

CD Pause NG

CD Search NG

CD Play NG

CD Open NG

CD Close NG

Cannot MD all erase.

Cannot set MD Rec Pause.

Cannot lock MD digital in.

Cannot play last track.

MD TOC are different.

Cannot read MD TOC.

Cannot read CD TOC.

Cannot set CD pause in

CD synchro mode.

Cannot search last track on CD.

Cannot play last track on CD.

Cannot open CD tray.

Cannot close CD tray.

Main Causes

– 24 –

When checking the emission of the laser diode during adjustments,
never view directly from the top as this may cause blindness.

As the laser diode in the optical pick-up is easily damaged by static
electricity, solder the laser tap of the flexible board when using it.
Before disconnecting the connector, solder first. Before connecting
the connector, be careful not to remove the solder. Also take ad-
equate measures to prevent damage by static electricity. Handle the
flexible board with care as it breaks easily.

1) When replacing the following parts, perform adjustments and

checks marked ¬ in the order shown in the following table.

Optical

Pick-up

BD Board

IC101, IC121, IC192

D101

IC171

pick-up

flexible board

laser tap

1. Temperature

compensation
offset adjustment

2. Laser power

adjustment

3. Traverse

adjustment

4. Focus bias

adjustment

5. Error rate check

¬

¬

G

¬

¬

G

¬

¬

¬

G

¬

¬

¬

G

¬

¬

¬

G

¬

¬

2) Perform the adjustment in the test mode.

After completing the adjustments, exit the test mode.

3) Perform the adjustments in the order shown.
4) Use the following tools and measuring devices.

• Check disc (MD) TDYS-1

(Parts No. 4-963-646-01)

• Laser power meter LPM-8001 (Parts No. J-2501-046-A)

or
MD Laser power meter 8010S (Parts No. J-2501-145-A)

• Oscilloscope (Measure after calibration of the probe).
• Digital voltmeter
• Thermometer

5) When observing several signals on the oscilloscope, etc., make

sure that VC and ground do not connect inside the oscilloscope.
(The VC and ground will short-circuit.)

Note : When performing laser power checks and adjustment

(electrical adjustment), use of the new MD laser power meter
8010S (J-2501-145-A) instead of the conventional laser
power meter is convenient.
It sharply reduces the time and trouble to set the laser power
meter sensor onto the objective lens of the pick-up.

• The disc is used for the focus bias adjustment and error rate check.

The following describes how to create a continuously recorded
disc.

1. Insert a disc (blank disc) commercially available.
2. Rotate the  VOLUME  knob to display “CREC MODE”.
3. Press the  p (CD)  button to display “CREC MID”.

“CREC (0300)” will be momentarily displayed and recording
started.

4. Complete recording within 5 minutes.
5. Press the  ^ (CD)  button and stop recording .
6. Press the  6 (MD)  button and remove the disc.

Create the continuous recorded disc for adjusting the focus bias
and checking the error rate as described above.
Note :
• Be careful not to apply vibrations during continuous recording.

Save the current temperature data in the non-volatile memory as
the 25 °C standard data.

Notes:
1. Normally, this adjustment should not be preformed.
2. Set the surrounding temperature to 22 to 28 °C when performing

this adjustment.
Also perform this adjustment immediately after the power is
turned on when the internal temperature of the unit is the same
as the surrounding temperature (22  to 28 °C).

3. After replacing D101, perform this adjustment after the

temperature of parts reach the surrounding temperature.

Adjusting Procedure:
1. Rotate the  VOLUME  knob, to display “TEMP ADJUST”.
2. Press the  p (CD)  button and select the “TEMP ADJUST” mode.
3. “TEMP= 

 ” and the current temperature data are displayed.

4. To save the data: Press the  p (CD)  button.

If not saving the data: Press the  ^ (CD)  button.

5. When the  p (CD)  button is pressed, “TEMP= 

 SAVE” is

displayed, and then “TEMP ADJUST” is displayed again.
“TEMP ADJUST” is displayed again immediately after the  ^
(CD)  button is pressed.

Specifications:
TEMP= 

 should be E0 to EF. F0 to FF, 00 to 0F, 10 to 1F and 20

to 2F.