Technics SJ-HD501, Руководство по обслуживанию

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electrostatic breakdown during repair of the MD unit (optical pickup).
5.1. Handling of MD Unit (optical pickup)
1. Do not subject the MD unit (optical pickup) to static electricity as it is extremely
sensitive to electrical shock.
2. The short land between the No. 25 (LD-GND) and No. 24 (LD) pins on the flexible
board is shorted with a solder build-up to prevent damage to the laser diode. (As
shown in
Fig. 1 .)
To connect to the PC board, be sure to open by removing the solder build-up, and
finish the work quickly.
3. Take care not to apply excessive stress to the flexible board (FFC).
4. Do not turn the variable resistor (laser power adjustment). It has already been
adjusted.
Fig. 1
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