2-8. Checking Servo Operation
Y Checking the focus search and spindle kick: 1
1) When the MD 2 button is pressed while the machine is in the OALL SV OFF� status without inserting a disc, focus search
and spindle kick are performed continuously.
The message OFOCUS SRCH� appears on the display.
2) After the check is completed, press the 9 button to show the message OALL SV OFF� on the display.
Y Checking the focus search and spindle kick: 2
1) When the OTUNER/BAND� button is pressed while the machine is in the OALL SV OFF� status with a disk inserted or
without inserted, focus search and spindle kick are performed continuously .
The message OFOCUS CHECK� appears on the display.
The S curve characteristics can be checked when a disc is inserted.
2) After the check is completed, press the 9 button to show the message OALL SV OFF� on the display.
Y Checking the focus servo
1) Insert a test disc.
2) Move the laser pickup to the center of a disc using the 6 button and 5 button.
3) Press the TAPE 1 2 button, and set the servo mode of the inserted disc as follows.
MO disk (MO) ................................... Select the OSELECT GRV� display.
PIT disk (CD) .................................... Select the OSELECT PIT� display.
4) Press the MD 2 button.
When the focus servo has no problem, the messages OFOCUS SRCH� appears then OFOCUS ON!� appears on the display.
5) After the check is completed, press the 9 button to show the message OALL SV OFF� on display.
Y Checking that all servos are turned ON
1) When the OENTER� button is pressed while the machine is in the OFOCUS ON!� status, the tracking and sled servos are
turned on and all servos start moving.
When the all servos have no problem, the message OALL SV ON� appears on the display.
2) After the check is completed, press the 9 button to show the message OALL SV OFF� on display.
3. ADJUSTMENT (MD)
3-1. Temperature Compensation Adjustment
Test point: Adjustment result is shown on the display
Jig: Thermometer
Adjustment method:
1) After activating the MD TEST mode, press the 9 button to display the OALL SV OFF� .
2) Press the ODISP� button to change the display to OTEMP=$���.
3) Press the OEDIT� button to change the display into OTMP+**c:?## �.
4) Place a thermometer near MD mechanism to measure the room temperature.
5) Perform adjustment by pressing the 6 and 5 buttons until the thermometer reading and the value ** that is shown on the
display agree. Press the OENTER� button.
6) After the adjustment is completed, press the 9 button to display OALL SV OFF�.
7) When the setting is completed, display the OTMP+**c:+##� again and check the value that is calculated by adding or
subtracting the ## value to and from ** must be the room temperature.
Note:DonOt perform the above adjustment if the room temperature cannot be measured.
3-2. Laser Power Adjustment
Test point: Pick up laser output
Jig: Laser power meter
Adjustment method:
1) Press the OTIMER/CLOCK� button three times in the OALL SV OFF� state to change the display to OLASER WRITE�.
2) Press the OEDIT� button once to display OLASER=$**�.
3) Measure the pick up laser output using the laser power meter, and perform adjustment so that the measuring value is 6.8?
0.03mW by pressing the 6 and 5 buttons. After the adjustment is completed, press the OENTER�button.
4) Press the 9 button to display OALL SV OFF�.
Note:If laser output exceeds 7.0mW, the pick up may be damaged.
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ACEC
