Service Caution Based On Legal Restrictions - Panasonic DMR-EH65EC Service Manual

2.3. SERVICE CAUTION BASED ON LEGAL RESTRICTIONS

General description about Lead Free Solder (PbF)
- The lead free solder has been used in the mounting process of all
electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
- The normal solder is the alloy of tin (Sn) and lead (Pb). On the other
hand, the lead free solder is the alloy mainly consists of tin (Sn), silver
(Ag) and Copper (Cu), and the melting point of the lead free solder is
higher approx.30 degrees C (86°F) more than that of the normal solder.
Service caution for repair work using Lead Free Solder (PbF)
- The lead free solder has to be used when repairing the equipment for
which the lead free solder is used.
- To put lead free solder, it should be well molten and mixed with the
original lead free solder.
- Remove the remaining lead free solder on the PCB cleanly for soldering
of the new IC.
- Since the melting point of the lead free solder is higher than that of the
normal lead solder, it takes the longer time to melt the lead free solder.
- Use the soldering iron (more than 70W) equipped with the temperature
6