When troubleshooting an electronic circuit, an unreliable high resistance "cold" solder joint can be located with the aid of an ohmmeter. Once the problem has been located, what should be done?
• Proper soldering technique and why temperature control matters • The purpose and safe use of an ohmmeter in troubleshooting • What a cold solder joint is and how it’s normally corrected
• Which option uses an appropriate, controllable heat source for working on an electrical connection? • Which choices might damage nearby components or the circuit board itself? • After repairing a suspect connection, what simple test would confirm that the fault is cleared?
• Eliminate any method that could overheat or burn components (plastic parts, insulation, circuit board). • Focus on methods that use standard electronic repair tools, not improvised heat sources. • Confirm that after the repair, the joint’s resistance is rechecked to verify the fix.
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