Laser Power Adjustment - Panasonic SJ-MJ50GH Service Manual

Laser power adjustment

Off-set automatic adjustment
Magneto-optical disc automatic adjustment
Playback-only disc automatic adjustment
Jitter meajurement (74minutes)
Jitter meajurement (60 minutes)
Destination change
Off-set automatic adjustment value check
Magneto-optical disc automatic adjustment
value check
Playback-only disc automatic adjustment value
check
Error rate measurement (double velocity)
ROM collection
DRAM check
Aging
Tilt measurement
PWB inspection
*In the display of T0J ~ TFJ shown above, you must adjust T0J , T1J , T2J and
T3J . You must perform the adjustment by observing the order T0J
T3J .
6.2.2. Laser Power Adjustment
Adjust each laser power: read power for reading (play).
6.2.2.1. Set the Unit to the Adjustment Mode
Cautions
About handling the optical pickup and the magnetic head.
-
The optical pickup is structured precisely; therefore, it is very fragile. Be
careful not to touch it 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.
-
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 set the unit to the laser power adjustment mode with the MD loaded.
Doing so may result in damage to the MD.
Adjustment mode
28
Display
T0J
T1J
T2J
T3J
T4J
T5J
T6J
T7J
T8J
T9J
TAJ
TBJ
TCJ
TDJ
TEJ
TFJ
T1J T2J