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– 17 –

1. Turn the VOLUME knob and display “ERR DP MODE”.
2. Press the

p (CD) button and display “total rec”.

1. Press the

^ (CD) button. The display will change to “ERR

DP MODE”.

Five memory types are selected by turning the VOLUME knob.

No.

Display

Contents

Function

1

total rec

Record time

Total time of laser power high.
About 20% of total recording time.

2

total play

playback time Total time of playback.

3

retry err

Total retry error

Total count of record and playback
retry error.

4

total err

All error count Total count of error.

5

err history

Error history

Error contents display.

6

err refresh

Error refresh

Clear the error histories memory

• Record time
1. Turn the VOLUME knob and display “total rec”.
2. Press the

§ (CD) button and display “r 

 h”.

Note • r   : total time

• Playback time
1. Turn the VOLUME knob and display “total play”.
2. Press the

§ (CD) button and display “p 

 h”.

Note • p   : total time

• Total retry error
1. Turn the VOLUME knob and display “retry err”.
2. Press the

§ (CD) button and display “r   p ”.

Note • r 

: Rcord total error

• p  : Playback total error

• All error count
1. Turn the VOLUME knob and display “total err”.
2. Press the

§ (CD) button and display “total ”.

Note • total   : total error

• Error history
1. Turn the VOLUME knob and display “err history”.
2. Press the

§ (CD) button and display “0   C ”.

Note • 0  : Number of  error

• C  : Error code (See table 4-4.)

1. Press the

§ (CD) button, the display will change to memory

types.

*

* Error refresh with optical pick-up exchange, another not execute.

Error

Contents

Code

00

No error

01

Disc error PTOC does

not read

02

DISC error

UTOC does not read

03

Loading error

04

Address does not read

Error

Contents

Code

05

Out of FOK

06

Focus does not work

07

Retry of record

08

Record retry error

09

Retry of Playback

0A

Playback retry error

– 18 –

Button

Contents

r REC

Turns recording on/off when pressed during
continuous playback.

§ (MD)

Disc eject

Note: The erasing-protection tab in not detected during the test mode.

Recording will start regardless of the position of the erasing-protec-
tion tab when the

r REC button is pressed.

Each time the POWER button pressed, the display changes in the
following order.

Note: Auto gain display and IVR display are not used in servicing.

Mode

display

Error rate

display

Address display

ADIP address

display

SUB Q address

display

Auto gain

display

IVR

display

Change over the display with the
POWER  button.

1. MODE display

Displays “TEMP ADJUST”, “CPLAY MODE”, etc..

2. Error rate display

Error rates are displayed as follows.
C1= 

 AD= 

C1= : Indicates C1 error
AD= : Indicates ADER

3. Address display

Address are displayed as follows.
h= 

 a= 

 (MO groove)

With this display, if POWER button is pressed, the following
will be displayed.
h= 

  s= 

 (MO pit and CD)

h=: Header address
s=: SUB Q address
a=: ADIP address

Note: “—” is displayed when the address cannot be read.

4. Auto gain display

Auto gain are displayed as follows.
AG = 

 / 

 [ 

 ]

     A      B     C

A= Focus servo gain coefficient
B= Tracking servo gain coefficient
C= [OK] or [NG] or [ - -] (not converged)

Display

Contents

Light

Off

REC

Recording mode on

Recording mode off

DISC

High reflection rate disc

Low reflection rate disc

– 19 –

To check the emission of the laser diode during adjustments, never
view directly from the top as this may lose your eyesight.

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, desolder first.  Before con-
necting the connector, be careful not to remove the solder.  Also
tale adequate measures to prevent damage by static electricity.
Handle the flexible board with care as it breaks easily.

2) Set the test mode when performing adjustments.

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)

• Oscilloscope (Measure after preforming CAL of prove.)
• Digital voltmeter
• Thermometer

5) When observing several signals on the oscilloscope, etc., make
sure that VC and ground do not connect inside the oscilloscope.

(VC and ground will become short-circuited)

* This disc is used in focus bias adjustment and error rate check.

The following describes how to create a MO continuous record-
ing disc.

1. Set the test mode.
2. Insert a MO disc (blank disc) commercially available.
3. Turn the VOLUME knob display “CREC MODE”.
4. Press the

p (CD) button and display “CREC MID”.

“CREC (0300)” is displayed for a moment and recording starts.

5. Complete recording within 5 minutes.
6. Press the

^ (CD) button and stop recording.

7. Press the

§ (MD) button and remove the MO disc.

The above has been how to create a continuous recording data for
the focus bias adjustment and error rate check.

Note: Be careful not to apply vibration during continuous recording.

1) When replacing the following parts, perform the adjustments

and checks with 

® in the order shown in the following table.

Optical

BD board

Pick-up IC171 D101 IC101, IC121, IC192

1.Temperature

compensation

×

®

®

®

offset adjustment

2.Laser power

®

®

×

®

adjustment

3.Traverse

®

®

×

®

adjustment

4.Focus bias

®

®

×

®

adjustment

5.Error rate check

®

®

×

®

Pick-up

Laser tap

Flexible board

– 20 –

Save the temperature data at that time in the non-volatile memory
as 25 °C reference data.

1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 °C to

28 °C.  Perform it immediately after the power is turned on
when the internal temperature of the unit is the same as the
ambient temperature of 22 °C to 28 °C.

3. When D101 has been replaced, perform this adjustment after

the temperature of this part has become the ambient tempera-
ture.

Adjusting Method:
1. Turn the VOLUME knob and display “TEMP ADJUST”.
2. Press the

p (CD) button to change the display to “TEMP =

” (The numbers “   ” displayed shows you the current tem-

perature.)

3. To save the data, press the

p (CD) button.

When not saving the data, press the

^ (CD) button.

4. When the

p (CD) button is pressed, “TEMP=    SAVE” will

be displayed for some time, followed by “TEMP ADJUST”.
When the

^ (CD) button is pressed, “TEMP ADJUST” will

be displayed immediately.

Specifications:
The temperature should be within “E0-EF”, “F0-FF”, “00-0F”,
“10-1F” and “20-2F”.

Adjusting Method:
1. Set the laser power meter on the objective lens of the optical

pick-up. (When it cannot be set properly, press the

= 0 button or ) + button and move the optical

pick-up.)
Connect the digital voltmeter to TP1004 (I+3 V) and TP1005
(IOP) of the BD (MD) board.

2. Turn the VOLUME knob and display “LDPWR ADJUST”.

(Laser power: for adjustment)

3. Press the

p (CD) button and display “LD 0.9 mW $  ”.

4. Turn the VOLUME knob so that the reading of the laser power

meter becomes 0.82 to 0.91 mW.
Set the range control on the laser power meter to 10 mW, then
press the

p (CD) button to save the adjustment result in the

non- volatile memory.
(“LD SAVE $ 

 ” will be displayed for a moment.)

5. Then “LD 7.0 mW $ 

 ”will be displayed.

6. Turn the VOLUME knob so that the reading of the laser power

meter becomes 6.9 to 7.1 mW, press the

p (CD) button and

save the adjustment result in the nonvolatile memory.
(“LD SAVE $ 

 ” will be displayed for a moment.)

Note: Do not perform the emission with 7.0 mW more than 15 seconds

continuously.

7. Turn the VOLUME knob and display “LDPWR CHECK”.
8. Press the

p (CD) button and display “LD 0.9 mW $  ”.

Check that the reading of the laser power meter becomes 0.80
to 0.96 mW.

9. Press the

p (CD) button and display “LD 7.0 mW $  ”.

Check that the reading of the laser power meter and digital volt-
meter satisfy the specified value.

Specification:
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ±10%

10. Press the

^ (CD) button and display “LDPWR CHECK”,

and stop the laser emission.
(The

^ (CD) button is effective at all times to stop the laser

emission.)

Optical pick-up

objective lens

laser
power meter

+
–

BD (MD) board

digital voltmeter

TP1004 (I+3 V)
TP1005 (IOP)

KMS260A

27X40
B0567

lOP=56.7 mA in this case
lOP (mA) = Digital voltmeter reading (mV)/1 (

Ω

)

(Optical pick-up label)