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■ ADOPTION OF LEAD-FREE SOLDER
This model uses lead - f ree solder. The LF mark indicates lead-free solder and appears on circuit boards and in the service manual.
The letter following the LF mark indicates the type of lead-free solder.
■ USING LEAD-FREE SOLDER
When soldering to repair a lead -free solder board, use a lead-free solder. Do not use conventional lead solder, as this may cause
accidents and failures due to cracking. The melting point of lead-free solder (Sn-Cu-Ni) is 45°C higher than lead solder, and thus it
is recommended that you use a special soldering iron. If you do not know where to obtain lead -free solder and a suitable soldering
iron, please contact your nearest SHARP service center or service branch.
■ SOLDERING WORK
The melting point of lead -free solder (Sn-Cu-Ni) is approximately 225°C, 45°C higher than conventional solder, and wettability is
not as good. For this reason there is a tendency to keep the soldering iron in contact with the board for a long time. However, this
may cause lifted lands and heating in excess of the heat tolerance of components, and thus the soldering iron should be removed
from the board as soon as you have verified that a bond has formed. Lead-free solder has a higher proportion of tin, which causes
increased corrosion of the tip of the soldering iron, and thus care should be taken to turn off the soldering iron whenever it is not
in use. Any different type of solder remaining on the tip of the soldering iron will form an alloy with lead-free solder, thus the tip
should be cleaned after you have finished soldering. If the tip of the soldering iron turns a dark color while you are soldering, clean
the tip with steel wool or fine-grained sandpaper.
APPLICABLE CIRCUIT BOARDS
PART CODE
DPWB-B557KKKZ
DPWB-B262KKKZ1
DPWB-B263KKKZ1
CPWB-A026JBKZ
DPWB-B591KKKZ
DPWB-B590KKKZ
DPWB-B589KKKZ
DPWB-B585KKKZ
DPWB-B593KKKZ
DPWB-B592KKKZ
DPWB-B595KKKZ
DPWB-B594KKKZ
DPWB-B597KKKZ
DPWB-B596KKKZ
DPWB-B599KKKZ
DPWB-B598KKKZ
PRECAUTIONS FOR USING LEAD-FREE SOLDER
(Example)
Indicates lead-free solder of tin, copper and nickel
N50EC PS UNIT
LX75 FLOAT-K UNIT
LX75 POSITION-K UNIT
S-B01 WF PWB UNIT
N50E CONT UNIT (only KI-N50E)
N40E CONT UNIT (only KI-N40E)
N50L CONT UNIT (only KI-N50L)
N40L CONT UNIT (only KI-N40L)
N50P CONT UNIT (only KI-N50P)
N40P CONT UNIT (only KI-N40P)
N50V CONT UNIT (only KI-N50V)
N40V CONT UNIT (only KI-N40V)
N50TA CONT UNIT (only KI-N50TA)
N40TA CONT UNIT (only KI-N40TA)
N50Y CONT UNIT (only KI-N50Y)
N40Y CONT UNIT (only KI-N40Y)
PART NAME
3
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