Panasonic SC-TM72DV, Service Manual

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7.2 Replacing Precautions for Optical
Pickup Unit
DVD/CD Optical Pickup
The optical pickup by which part supply was carried out attaches the short clip to the flexible board for laser diode electrostatic
discharge damage prevention. Please remove the short clip and be sure to check that the short land is open, beforeconnecting.
(Please remove solder, when the short land short-circuits.)
7.3 Grounding for Preventing Electrostatic
Destruction
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity accumulated in your body. (Refer to Fig. 7.2)
2. Work place grounding
Place a conductive material (conductive sheet) or ironboard where optical pickup is placed. (Refer to Fig. 7.2)
Note :
Keep your clothes away from optical pickup as wrist strap does not release the static electricity charged in clothes.
Fig. 7.2
8 Precaution of Laser Diode
Caution :
This product utilizes a laser diode with the unit turned «ON», invisible laser radiation is emitted from the pick
up lens. Wavelength : 662 nm(CD)/785 nm(DVD) Maximum output radiation power from pick up : 100 µW/
VDE
Laser radiation from pick up unit is safety level, but be sure the followings:
1. Do not disassemble the optical pick up unit, since radiation from exposed laser
diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.