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– 17 –

•

Turn OFF the power of the unit, and set the test mode by pressing
the following keys together.

  FUNCTION  +  PRESET EQ  +  GROOVE

When set, the following will be displayed.

1. Press the  REPEAT  key.
2. The set thus becomes available for normal operation.

•

All operations are performed using the MULTI JOG dial,
 ENTER/YES  key, and  EDIT/NO  key.

•

The functions of these keys are as follows.

MULTI JOG dial

Changes parameters and models.

ENTER/YES key

Proceeds onto the next step.
Finalizes input.

EDIT/NO Key

Returns to previous step.
Stops operation.

Eight test modes are selectied by turning the MULTI JOG dial.

TEMP

ADJUST

Temperature compensation offset
adjustment

LDPWR ADJUST

Laser power adjustment

EFBAL

ADJUST

Traverse (E-F balance) adjustment

FBIAS

ADJUST

Focus bias adjustment

FBIAS

CHECK

Focus bias check

CPLAY MODE

Continuous playback mode

CREC

MODE

Continuous reading mode

EEP

MODE

Non-volatile memory mode (*1)

•

For detailed description of each adjustment mode, refer to sec-
tion 5. Electrical Adjustments.

•

If a different adjustment mode has been selected by mistake,
press the  EDIT/NO  key to exit from it.

*1: The EEP MODE is not used in servicing. This mode reads and

writes the contents of the non-volatile memory. If set acciden-
tally, press the  EDIT/NO  key immediately to exit it.

1. Entering the continuous playback mode

1) Set the disk in the unit (either MO or CD).
2) Turning the MULTI JOG dial and display “CPLAY MODE”.
3) Press the  ENTER/YES  key to change the display “CPLAY

IN” .

4) When access cpmpletes, the display changes to

“C1 =           AD =      ”.

Note: The “

” displayed are arbitrary numbers.

2. Changing the parts to be played-back

1) Press the  ENTER/YES  key  during continuous playback to

change the display to “CPLAY  MID”, “CPLAY OUT”.
When pressed another time, the parts to be played-back can
be changed.

2) When access completes, the display changes to

“C1 =           AD =      ”.

Note: The “

” display are arbitrary numbers.

3. Ending the continuous playback mode

1) Press the  EDIT/NO  key. The display will change to “CPLAY

MODE”.

2) Press the  

§(MD)  key and remove the disc.

Notes:
1. The playback start addresses for IN, MID, and  OUT are as

follows.
IN: 40h cluster
MID: 300h cluster
OUT: 700h cluster

2. The  EDIT/NO  KEY can be used to stop playing any time.

1. Entering the continuous recording mode

1) Set the MO disc in the unit.
2) Turning the MULTI JOG dial and display “CREC MODE”.
3) Press the  ENTER/YES  key to change the display to “CREC

IN”.

4) When access completes, the display changes to “CREC

(           )” and  

REC

  lights up.

Note: The “    ” displayed are arbitrary humbers.
2. Changing the parts to recorded

1) When the  ENTER/YES  key is pressed during continuous

recording, the display changes to “CREC MID”, “CREC
OUT” and  

REC

  goes off. When pressed another time, the

parts to be recorded can be changed.

2) When access completes, the display changes to “CREC

(           )” and  

REC

  lights up.

Note: The “    ” displayed are arbitrary numbers.

3. Ending the continuous recording mode

1) Press the  EDIT/NO  key. The display will change to “CREC

MODE” and  

REC

  goes off.

2) Press the  

§(MD)  key and remove the disc.

1. The recording start address for IN, MID, and OUT are as

follows.
IN

: 40h cluster

MID : 300h cluster
OUT : 700h cluster

M

T

B U

EM P

T e s t

A D J U

M o

S T

d e

– 18 –

2. The  EDIT/NO  key can be used to stop recording anytime.
3. During the test mode, the erasing-protection tab will not be

detected. Therefore be carefull not to set the continuous re-
cording mode when a disc not be erased is set in the unit.

4. Do not perform continuous recording for long periods of

time above 5 minutes.

5. During continuous recording, be carefull not to apply vi-

bration.

Sets continuous playback when pressed in the
STOP state. (servo all on)
When pressed during continuous playback, the
tracking and sled servo turns off.
When pressed during tracking and sled servo
turned off, the turns on.

·(MD)

Stop continuous playback and continuous record-
ing. (servo all off)

The sled moves to the outer circumference only
when this is pressed.

π(MD)

)

The sled moves to the inner  circumference only
when this is pressed.

0

Turns recording on/off when pressed during con-
tinuous playback.

r REC

Switches between the pit and groove modes when
pressed.

TIME
CONTROL

Switches between the CLV-S (pull-in mode) and
CLV-A (playing servo) modes when pressed.
(Switches the spindle servo mode.)

PLAY
MODE

Switches the display when pressed.
Returns to previous step. Stops operatios.

DISPLAY

§(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-protection tab when the  

r REC  key is pressed.

MODE

display

Error rate

display

Address

display

1. MODE display

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

2. Error rate display

Error rates are displayed as follows.

C1 =            AD =

C1 = : Indicates C1 error
AD = : Indicates ADER

•

Each time the  DISPLAY  key pressed, the display changes in the
following order.

3. Address display

Address are displayed as follows.

h =           s =

(MO pit and CD)

h =           s =

(MO groove)

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

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

– 19 –

1. As loading related operations will be performed regardless of

the test mode operations being performed, be sure to check that
the disc is stopped before setting and removing it.
Even if the  

§(MD)  key is pressed while the disc is rotating

during continuous playback, continuous recording, etc., the disc
will not stop rotating.
Therefore, it will be ejected while rotating.
Always press the  EDIT/NO  key first before pressing the
§(MD)  key.

2. The erasing-protection tab is not detected in the test mode. There-

fore, when modes which output the recording laser power such
as continuous recording mode and traverse adjustment mode,
etc. are set, the recorded contents will be erased regardless of
the position of the tab. When using a disc that is not to be erased
in the test mode, be careful not to enter the continuous record-
ing mode and traverse adjustment mode.

Light

Off

Blinking

During continuous Stop state

(

playback

(servo all off)

(servo all on)

P

Tracking and

Tracking and

sled servo off

sled servo on

Recording mode Recording mode
on

off

SYNC

CLV lock state

CLV unlock state

TRACK

Pit mode

Groove mode

DISC

High reflection

Low reflection

rate disc

rate disc

LEVEL-

Spindle servo

Spindle servo

SYNC

CLV-S (pull-in

CLV-A (playing

mode)

mode)

PROGRAM

ABCD adjustment not adjustment
Completed

Focus auto gain

Focus auto gain

and tracking

successful,

SHUFFLE

auto gain

tracking auto

successful

gain failed

REC

– 20 –

1) When replacing the following parts, perform the adjustments

and checks with 

® in the order shown in the following table.

IC171

D101

IC101, IC121, IC191

1. Temperature

compensation

×

®

®

®

offset adjustment

2. Laser power

®

×

×

®

adjustment

3. Traverse

®

®

×

®

adjustment

4. Focus bias

®

®

×

®

adjustment

5. Error rate check

®

®

×

®

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.

•

Test disc (CD) TDYS-1

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

•

Laser power meter LPM-8001

(Parts No. J-2501-046-A)

•

Oscilloscope

•

Digital voltmeter

•

Thermometer

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

sure that VC and GND do not connect inside the oscilloscope.
(VC and GND 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. Turning the MULTI JOG dial and display “CREC MODE”.
4. Press the  ENTER/YES  key and display “CREC IN”.
5. Press the  ENTER/YES  key again to display “CREC MID”.

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

6. Complete recording within 5 minutes.
7. Press the  EDIT/NO  key and stop recording.

8. Press the  

§ (MD)  key 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.

Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.

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

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 elec-
tricity. Handle the flexible board with care as it breaks easily.

Laser tap