Panasonic SJ-MR220 Service Manual page 20

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
6mW. 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
staticelectricity generated in your clothes or body. Be especially
careful with the static electricity.
6.2.2.2. Adjustment Procedure
1. Have "T0**" indicated on display, and move the optical pickup to the
most inside (only when a MD cartridge type laser power meter is
used).
2. Set the laser power meter.
[For use of stick type laser power meter.]
2-1 Uncover the laser power meter (refer to
2-2 Locate the sensor of the laser power meter right over above the
optical pickup (horizontally at a level of the disc position). (as
shown in Fig.
[For use of MD cartridge type laser power meter.]
2-1 Set the laser power meter and close the disc cover, fix it with
tape as not to open. (refer to
8)
Fig.
Fig. 9).
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7).