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m SERVICING NOTE
Disconnect power supply.cord before separating cabinet for servicing as you may experience an electric shock.
Avoid repairing under direct sunshine and heat which may cause cabinet, transistor and IC to be transformed or misoperate.
Use a soft cotton swab moistened with warm water or neutral cleaner when parts of a unit need to be cleaned.
When replacing parts with safety features built in, be sure to use specified parts with same specifications only.
Avoid repairing the set near a TV or any other magnetic forces.
Disconnect the plug from wall socket during electric storm to reduce the risk of damage.
Be careful of electrostatic damage when replacing the control [C such as p-COM, LSI and pick-up.
Be sure not to separate the pick-up from the unit and not to touch the ALPC (Automatic Laser Power Control) circuit.
BNAARWON
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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.
Place a conductive sheet on the workbench. (The black sheet used as wrapping for repair parts.)
Place the set on the conductive sheet so that the chassis is grounded to the sheet.
Place your hands on the conductive sheet. (This gives them the same ground as the sheet.)
Remove the optical pick up block.
Perform work on top of the conductive sheet.
Be careful not to let your clothes or any other static sources touch the unit.
"Pons
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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.
:
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@) Wrist-strap
6 |
for grounding
The unit
@ Conductive sheet
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