Panasonic SC-TM72DV, Service Manual

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6 Handling the Lead-free Solder
6.1 About lead free solder (PbF)
6.1 About lead free solder (PbF)
Distinction of PbF P.C.B.:
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B. Caution:
•
Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.
Please use a high temperature soldering iron.
In case of soldering iron with temperature control,please set it to 700 ± 20°F (370 ± 10°C).
•
Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
•
When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the
soldering points with the Pb free solder until it melts enough.
7 Cautions to be taken when handling
Optical Pickup
The laser diode used inside optical pickup could be destroyed due to static electricity as a potential difference is caused by
electrostatic load discharged from clothes or human body.
Handling the parts carefully to avoid electrostatic destructionduring repair.
7.1 Handling Optical Pickup
7.2 Replacing Precautions for Optical Pickup Unit
7.3 Grounding for Preventing Electrostatic Destruction
7.1 Handling Optical Pickup
1. Do not impact on optical pickup as the unit structurally uses an extremely precise technology.
2. Short-circuit the flexible cable of optical pickup remove from the circuit board using a short-circuit pin or clip in order to
prevent laser diode from electrostatic destruction (Refer to Fig. 7.1 and Fig. 7.2)
3. Do not handle flexible cables forcibly as this may cause snapping. Handle the parts carefully (Refer to Fig. 7.1)
4. A new optical pickup is equipped with an anti-static flexible cable. After replacing and connecting to the flexible board, cut
the anti-static flexible cable. (Refer to Fig. 7.1)
Fig. 7.1