Lead Free Solder - Hitachi 32PD3000 Service Manual

LEAD FREE SOLDER

This product uses lead free (unleaded) solder to help preserve the environment. Please read these instructions
before attempting any soldering work.
Caution:
Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead free solder can
splatter at high temperatures (600°C).
Lead Free Solder Indicator
Printed circuit board assemblies using lead free solder shown below are engraved with an "F" following Board
Name.
Properties of Lead Free Solder
The melting point of lead free solder is 40~50°C higher than leaded solder.
When Servicing Solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended.
Although servicing with leaded solder is possible there are a few precautions that have to be taken. (Not taking
these precautions may cause the solder not to harden properly and lead to consequent malfunctions.)
Precautions when Using Leaded Solder
•
Remove all lead free solder from soldered joints when replacing components.
•
If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the
lead free solder has been completely melted (do not apply the soldering iron without adding solder).
When Servicing Soldering Iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead free solder is higher than leaded solder. To avoid poor servicing performance, use a
soldering iron that maintains a high stable temperature (large heat capacity) and that allows temperature
adjustment according to the part being serviced.
Recommended Soldering Iron
Soldering iron with temperature control function (temperature range: 320~450°C)
Recommended temperature range for each part type:
Part to be Soldered
PCB with surface mount devices
PCB without surface mount devices
Chassis, metallic shield, etc.
Board Assemblies Using Lead Free Solder:
•
FC4PDP Board (AVC block)
•
SIGNAL/SOUND Board (MONITOR block)
•
SP Terminal L/R Board, FILTER Board, LED Board (MONITOR block)
Soldering Iron
Temperature
320 ±30°C
380 ±30°C
420 ±30°C
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