— 6 —
2 Handling the Optical Pick-up
The laser diode in the optical pick up may suffer electrostatic
breakdown because of potential static electricity from
clothing and your body.
The following method is recommended.
(1) Place a conductive sheet on the work bench (The black
sheet used for wrapping repair parts.)
(2) Place the set on the conductive sheet so that the chassis is
grounded to the sheet.
(3) Place your hands on the conductive sheet (This gives
them the same ground as the sheet.)
(4) Remove the optical pick up block
(5) Perform work on top of the conductive sheet. Be careful
not to let your clothes or any other static sources to touch
the unit.
◆
Be sure to put on a wrist strap grounded to the sheet.
◆
Be sure to lay a conductive sheet made of copper etc.
Which is grounded to the table.
(6) Short the short terminal on the PCB, which is in-side the
Pick-Up ASS’Y, before replacing the Pick-Up. (The short
terminal is shorted when the Pick-Up Ass’y is being lifted
or moved.)
(7) After replacing the Pick-up, open the short terminal on
the PCB.
THE UNIT
WRIST-STRAP
FOR GROUNDING
1M
1M
CONDUCTIVE SHEET
Fig.2
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