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Adjustment mode
Display
Laser power adjustment
T1
Magneto-optical disc automatic adjustment
T2
Playback-only disc automatic adjustment
T3
EFM jitter meajurement
T4
Record inspection
T5
REC jitter meajurement
T6
Magneto-optical disc automatic adjustment
value check
T7
Playback-only disc automatic adjustment value
check
T8
Error rate measurement (double velocity)
T9
AD read result confirmation
TA
ROM collection check sum
TB
DRAM check
TC
Reliability test
TD
Tilt measurement (disc middle speed)
TE
PWB inspection (audio test)
TF
*In the display of T1 ~ TF shown above, you must adjust T1, T2 and TF. You must perform the
adjustment by observing the order T1 T2 T3.
6.2.2. Laser Power Adjustment
Adjust each laser power: read power for reading (play) and write power for writing (record).
6.2.2.1. Set the Unit to the Adjustment Mode
Cautions
About handling the optical pickup and the magnetic head.
- The optical pickup and the magnetic head are structured precisely;
therefore, they are very fragile. Be careful not to touch them with
the edge of the laser power meter. Do not touch the lens.
- The sensor of the laser power meter is a very fine part. Be careful
not to touch it to the optical pickup lens.
- Do not loosen or remove the magnetic head installing screw.
- The focus point of the laser reaches to 356°F. Therefore, avoid
adjusting using laser power for a long time because the sensor of
the laser power meter may be burned.
- Do not allow the write power to even momentarily reach or exceed
5 mW. Doing so will result in damage to the optical pickup.
- Do not set the unit to the laser power adjustment mode with the
MD loaded. Doing so may result in damage to the MD.
- Laser diode in the optical pickup may be destroyed by the
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