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3. Operating Instructions
4. Handling Precautions for Optical Magnetism Head
Unit
The laser diode in the optical magnetism head unit may break down due to potential difference
caused by static electricity of clothes or human body.
So, be careful of electrostatic breakdown during repair of the optical magnetism head unit.
4.1. Handling the optical magnetism head unit
1. The optical magnetism head unit is an extremely high-precision
construction and must not be subjected to impact, excessive
vibration, or other types of rough handling.
2. In order to prevent static electricity damage to the laser diode,
use a short pin or similar tool to short the optical pickup’s flexible
circuit boards after they have been disconnected from the main
circuit board. (as shown in Fig. 1 )
3. Handle the flexible circuit boards with care; excessive force could
cause them to be broken.
4. Do not turn the pre-set variable resistor (for adjustment of the
laser power); it has been adjusted at the factory.
(as shown in Fig. 2 )
Fig. 1
Fig. 2