Daewoo DM-K40, Service Manual

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Daewoo DM-K40 Service Manual
Page 3
1.2.2. Laser Caution
CAUTION
Adjusting the knobs, switches, and controls, etc. or taking actions
not specified herein may result in a harmful emission of laser
beams. This CD Changer must be adjusted and repaired only by
qualified service personnel.
Laser symbol :
THIS IS COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS 1 LASER
PRODUCT.
THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EXTERIOR.
1.3. Precautions
1.3.1. ESD Precautions in Repairing
1.3.1.1. Do not apply excessive pressure on the mechanical
parts (moving pares), including the Pickup Block, as
extremely high mechanical precision or required in these
parts.
1.3.1.2. When soldering the microprocessor and signal
processing IC’s, use a ceramic soldering iron or a soldering
iron whose metal part is grounded since they are not
resistant to static electricity.
1.3.1.3. When removing the solder or soldering the laser shorting
lands for the Pickup Block, use a ceramic soldering iron or
a soldering iron whose metal part is grounded since the