Electrostatic Protection Measures; Cautions When Handling Dvd Drive - Hitachi DZ-MV580A Service Manual

Safety Precaution for Repair > Electrostatic Protection Measures / Cautions When Handling DVD Drive

1-2 Electrostatic Protection Measures

Semiconductor components can be damaged by static electricity charged on clothes, human body,
etc. Take great care when handling components to avoid electrostatic damage, and perform
servicing in an environment where grounding is complete.
(1) Grounding work bench (Fig. 1-2-1)
Lay out an antistatic mat on work bench, and then use the ground plate to ground the work bench.
(2) Grounding human body (Fig. 1-2-2)
Use an antistatic wrist strap to discharge any static electricity charged on the body. Also, use a
tester for wrist strap to make sure that the wrist strap is working normally. Note, however, that
static electricity charged on clothes will not be discharged by wrist strap: Therefore do not allow
your clothes to touch the semiconductor components.
Antistatic mat
Fig. 1-2-1 Grounding Work Bench

1-3 Cautions When Handling DVD Drive

The optical pickup in DVD drive has a high precision structure: Be sure to observe the following
cautions.
1) Do not subject optical pickups to any severe vibrations or impact during movement, installation
or disassembly.
2) When performing repair work, do not perform disassembly any further than that described in
this manual.
3) Never turn the semi-variable resistors for adjustment in optical pickup or DVD drive.
4) NEVER look into the objective lens in optical pickup or directly view the laser light: You could
lose your eyesight.
1M ohm
Ground
Do not directly look at laser light
from pickup.
Fig. 1-3-1 Cautions on Optical Pickup
1 - 2
Antistatic wrist strap
Fig. 1-2-2 Grounding Human Body
1M ohm