Handling The Lead-Free Solder; About Lead Free Solder (Pbf); Handling Precautions For Traverse Deck - Panasonic SC-TM23 Service Manual

5.1 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.
The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity
of clothes or human body.
So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
Handling of traverse deck (optical pickup)
1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.
2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).
3. Take care not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin,
finish the job in as short time as possible.
4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.

5 Handling the Lead-free Solder

6 Handling Precautions For Traverse Deck

5