Working Instruction
,
Electrical
Information text
3
A lead free work area must be set up that is
completely separated from work areas that are
used to make leaded repairs.
The lead-free work area must also be clearly
marked with the lead free symbol as shown in
the figure beside.
The items in this table must remain lead free.
They must be adequately marked to make their
lead free status clearly and easily recognized.
1.1.2 Soldering
temperature
The characteristics of Lead Free Solder paste is:
•
High melting point (Typically 220°C)
•
Low wet ability
•
High surface tension
•
Difficult to spread
Recommended tip temperature 370°C
When servicing PCB´s that is produced with Lead Free Solder paste this paste must be used.
Otherwise there is a high risk for unreliable soldering joints.
A smaller introduction of the solder temperature, with pictures, is as follow:
Information text
1
Lead Free Solder joints are more difficult to
inspect because they do not have shiny surfaces
like leaded solders joints.
Lead Free Solder does not flow as well as
leaded solder. Some of the solder pad area may
remain exposed.
The picture shows an example of Lead Free
Solders joints.
3/000 21-2/FEA 209544/88 C
Company Internal
Sony Ericsson Mobile Communications AB
3(13)
