Hitachi Electrostatic Protection Measures, Grounding work bench Fig, Grounding human body Fig

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

1M ohm	Antistatic wrist strap	1M ohm
Ground
Fig. 1-2-1 Grounding Work Bench	Fig. 1-2-2 Grounding Human Body

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.

Do not directly look at laser light from pickup.

Fig. 1-3-1 Cautions on Optical Pickup

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