Hitachi 26LD8000TA specifications Service points

4.Service points

zLead-free solder

This product uses lead-free solder (unleaded) to help protect 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℃).

„Lead-free solder indicator

Printed circuit boards using lead-free solder are engraved with an label.

„Properties of lead-free solder

The melting point of lead-free solder is 40-50℃higher than leaded solder.

„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 to not harden properly, and lead to consequent malfunctions.)

Precautions when using leaded solder

z Remove all lead-free solder from soldered joints when replacing components.

zIf 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 solder).

„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. 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:

zSoldering iron with temperature control function (temperature range: 320-450℃)

Recommended temperature range per part:

Part	Soldering iron temperature
Mounting (chips) on mounted PCB	320℃±30℃
Mounting (chips) on empty PCB	380℃±30℃
Chassis, metallic shield, etc.	420℃±30℃

(1)IR PWB, KEY PWB, SWThePWB,2*PWBI/OassemblyPWB which has used lead free solder

(2)MAIN PWB

(3)POWER BOARD

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