Hitachi DZ-GX3300E Service Manual page 8

Safety Precaution for Repair > Lead-Free Solder
(5) Cautions when using lead based solder
It is recommended that you use lead-free solder when servicing, but it is also possible to service
using lead based solder. However, if lead based solder is used for servicing, take care with the
following:
1) Before using lead based solder, remove the lead-free solder completely from the point to be
soldered.
2) For additional soldering for repair, set the soldering iron tip temperature for lead-free solder,
mix lead based solder and lead-free solder suffi ciently. Do not perform any repair using the
bare soldering iron tip without adding solder, since it will cause secondary failure due to lack of
strength.
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