Panasonic SJ-MR200 Service Manual page 18

Adjustment mode
Laser power adjustment
Magneto-optical disc automatic adjustment
Playback-only disc automatic adjustment
EFM jitter meajurement
Record inspection
REC jitter meajurement
Magneto-optical disc automatic adjustment
value check
Playback-only disc automatic adjustment value
check
Error rate measurement (double velocity)
AD read result confirmation
ROM collection check sum
DRAM check
Reliability test
Tilt measurement (disc middle speed)
PWB inspection (audio test)
*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
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
Display
T1
T2
T3
T4
T5
T6
T7
T8
T9
TA
TB
TC
TD
TE
TF
T2 T3.
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