PRECAUTIONS FOR USING LEAD-FREE SOLDER
1 Employing lead-free solder
“ALLPWB”ofthismodelemployslead-freesolder.TheLFsymbolindicateslead-freesolder,andisattachedonthe
PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
2 Using lead-free wire solder
WhenxingthePWBsolderedwiththelead-freesolder,applylead-freewiresolder.Repairingwithconventionallead
wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend you to
use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our
service station or service branch in your area.
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead solder by
40°C,andasithaspoorsolderwettability,youmaybeapttokeepthesolderingbitincontactwiththePWBforextended
periodoftime.However,Sincethelandmaybepeeledofforthemaximumheat-resistancetemperatureofpartsmaybe
exceeded,removethebitfromthePWBassoonasyouconrmthesteadysolderingcondition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and
off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every
use of it.
Whenthetipofthesolderingbitisblackenedduringuse,leitwithsteelwoolornesandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing.
Indicates lead-free solder of tin, silver and nickel.
L F n
Sn-Ag-Ni
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