Sharp LC-40LE511E Handy Guide ▷ View online
Electrical Adjustments
Version 1.0
Issue 07/2012
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Diagnostics:
Product Safeguards
Version 1.0
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Precautions for using lead-free solder
1
Employing lead-free solder
"Input, Output, R/C Receiver, Key and Fan PWB" of this model employs lead-free solder.
The LF symbol indicates lead-free solder, and is attached on the PWBs and service
manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper.
2
Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder.
Repairing with conventional lead 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
ranch 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, and as it has poor solder wettabillty, you may be
apt to keep the soldering bit in contact with the PWB for extended period of time.
However, Since the land may be peeled off or the maximum heat-resistance temperature
of parts may be exceeded, remove the bit from the PWB as soon as you confirm the
steady soldering condition.
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.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine
sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Part No.
Description
ZHNDAi123250E
φ0.3mm 250g(1roll)
ZHNDAi126500E
φ0.6mm 500g(1roll)
ZHNDAi12801KE
φ1.0mm 1kg(1roll)
Notes
Version 1.0
Issue 07/2012
Issue 07/2012
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SHARP ELECTRONICS (UK) LTD
CE TECHNICAL SUPPORT
TECHNICAL SERVICES GROUP
Notes
Version 1.0
Issue 07/2012
Issue 07/2012
24
SHARP ELECTRONICS (UK) LTD
CE TECHNICAL SUPPORT
TECHNICAL SERVICES GROUP
