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Mastering the Art of Soldering
4.6.2 Repairing and Preventing Common Soldering Issues
1. Disturbed Joint
When a joint is accidentally moved as the solder hardens, you end up with a disturbed solder
joint which looks rough or frosted.
How to Repair:
Reheat the solder and make sure that there is no movement as it cools
How to Avoid:
Stabilize the PCB with a third hand device
Soldering Vise (not included in the kit)
2. Cold Joint
When the solder doesn’t melt completely, the result will be a cold joint. Cold solder joints are
weak and usually develop cracks over time and thus unreliable.
How to Repair:
Reheat the joint and until the solder flows
How to Avoid:
Preheat the soldering iron with adequate power
3. Overheated Joint
An overheated joint results from the solder not flowing well. Usually it has residue of burnt
flux that makes it difficult to repair.
How to Repair:
Carefully remove the burnt flux using the tip of a knife or very little alcohol &
a toothbrush
How to Avoid:
Clean the joint to avoid overheating and keeping the soldering iron clean and
hot