Lead Free Solder - Hitachi 32PD3000E Service Manual

32PD3000 / 42PD3000

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 one of leaded solder.
• When servicing solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended.
o
Although servicing with leaded solder is possible, there are a few precautions that have to be
o
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.
o
If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly
o
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 one of leaded solder. Use a soldering iron that maintains a
high stable temperature (large heat capacity),and that allows temperature adjustment according to the part
being serviced, to avoid poor servicing performance.
Recommended soldering iron:
Soldering iron with temperature control function (temperature range:320-450 °C)
Recommended temperature range per part:
Soldering Part
PCB with surface mount devices
PCB without surface mount devices
Chassis, metallic shield, etc.
•
FC4PDP board (AVC block)
• SIGNAL/SOUND board (MONITOR block)
•
SP terminal L/R board, FILTER board, LED board (MONITOR block)
6
PCBs which use lead free solder
Soldering iron temperature
320 °C ±30 °C
380 °C ±30 °C
420 °C ±30 °C