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1

Two step screws

2

Two step screws

3

Two insulators

4

Two insulators

5

Sub chassis

Part A

Part A

Part A

NG

OK

Take care so that the part A
may be right position when installing.

1

Stopper washer

2

Shaft (shutter)

3

Shutter assembly

Shaft (lid)

Shaft (shutter)

Hole B

Hole A

When installing, install the shaft
(shutter) into the hole A as shown
in the figure before installing the
shaft (lid) into the hole B.

Shutter assembly

— 26 —

1

Precision screw (P1.7x6)

2

Over write head

— 27 —

1

Screw
(M1.7x2)

2

Retainer (gear)

3

Set the shaft of Gear (LA) to be at the
position in the figure.

4

Remove the slider complete assembly
in the direction of arrow with putting
out of two claws.

claw

claw

45°

Slider assembly

OK

NG

Take care not to damage
the detective switch.

Part A

Install the part A of lever (head up)
to pass over the slider complete assembly.

— 28 —

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 

§ button 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.
Be sure to press the 

§ button after pressing the NO button and the rotation of disc is stopped.

2 The erasing-protection tab is not detected in the test mode. Therefore, operating in the recording laser emission mode and pressing the r

button, 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 recording mode and traverse adjustment mode.

1. Continuous recording mode (CREC MODE)
2. Traverse adjustment mode (EFBAL ADJUST)
3. Laser power adjustment mode (LDPWR ADJUST)
4. Laser power check mode (LDPWR CHECK)
5. When pressing the 

r button.

While pressing the AMS knob, insert the power plug into the power supply inlet, and release the AMS knob.

When the REPEAT button is pressed, it becomes in the STANDBY mode. Or unplug the power plug from an outlet.

All operations are performed using the AMS knob, YES button, and NO button.
The functions of these buttons are as follows.

Function name

AMS knob

YES button

NO button

Function

Changes parameters and modes

Proceeds onto the next step. Finalizes input.

Returns to previous step. Stops operations.

Thirteen test modes are selected by turning the AMS knob.

Display

TEMP ADJUST

LDPWR ADJUST

LDPWR CHECK

EFBAL ADJUST

FBIAS ADJUST

FBIAS CHECK

CPLAY MODE

CREC MODE

DETRK CHECK

S curve CHECK

EEP MODE

MANUAL CMD

SVDATA READ

Contents

Temperature compensation offset adjustment

Laser power adjustment

Laser power check

Traverse adjustment

Focus bias adjustment

Focus bias check

Continuous playback mode

Continuous recording mode

Detrack check

S curve check 

∗

Non-volatile memory mode 

∗

Manual command transfer mode 

∗

Data reading out mode 

∗

For detailed description of each adjustment mode, refer to “5. Electrical Adjustments”.
If a different adjustment mode has been selected by mistake, press the NO button to exit from this mode.
* The EEP MODE, S curve CHECK, MANUAL CMD and SVDATA READ are not used in servicing. If set accidentally, press the NO

button immediately to exit this mode.