General equipment failure when units warm / hot in high humidity environments
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Author: Greg York
Various Models / Chassis
General failure when units warm / hot in high humidity environments. Units operate normally once cold, failure only occurs occasionally then seems OK but when warm fails again
Many PCB's/components have contamination which will manifest themselves in warm and humid environments, so once unit is warm then electrical failure occurs. Clean circuit first in solvent/water combination and retest unit. Failure should disappear. If corrosion found on joints then reheat with soldering iron which you may see joints bubble then clean PCB thoroughly. Best to soak in cleaner then wipe around with lint free wipe especially around powered components. NOTE contamination is typically hygroscopic and will attract moisture if particularly bad will electromigrate if not too bad then poor SIR Surface Insulation Resistance (occasional unexplained failure) Could go on for long time but this is only the start! Does this sound familiar to anybody ??
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