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What caused this pcb to blow out?
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<blockquote data-quote="ElectricSpecs" data-source="post: 536948" data-attributes="member: 33199"><p>[USER=28452]@Geoff1946[/USER] Hmm interesting idea that the bulb /wiring could have shorted. That would indeed leave the bulb fine but have caused a massive current surge which would take out the track. Only thing is it all seems fine now which would imply an intermittent fault in which case how do you effectively check it and know its good?</p><p></p><p>You said "The metalisation should be removed from the PCB with emery. Also one of the switch terminals still isn't properly soldered."</p><p>WHat is the reason for removing the metalisation from the PCB? I'm guessing it could become loose /flake off and cause a short?</p><p></p><p>WHich swtich terminal? one of my repair joints or the original factory solders?</p><p></p><p>And thanks for looking at replacement PCBs and yes it was a sense of complete mickey taking on the price that led me to repair rather than replace.</p><p></p><p>The appliance btw is made by AEG which AFAIK is a good german brand - looked at replacing the whole extractor and we are talking best part of £400! - but it's lasted well over 10 years although poor solder joints are inexcusable IMO</p></blockquote><p></p>
[QUOTE="ElectricSpecs, post: 536948, member: 33199"] [USER=28452]@Geoff1946[/USER] Hmm interesting idea that the bulb /wiring could have shorted. That would indeed leave the bulb fine but have caused a massive current surge which would take out the track. Only thing is it all seems fine now which would imply an intermittent fault in which case how do you effectively check it and know its good? You said "The metalisation should be removed from the PCB with emery. Also one of the switch terminals still isn't properly soldered." WHat is the reason for removing the metalisation from the PCB? I'm guessing it could become loose /flake off and cause a short? WHich swtich terminal? one of my repair joints or the original factory solders? And thanks for looking at replacement PCBs and yes it was a sense of complete mickey taking on the price that led me to repair rather than replace. The appliance btw is made by AEG which AFAIK is a good german brand - looked at replacing the whole extractor and we are talking best part of £400! - but it's lasted well over 10 years although poor solder joints are inexcusable IMO [/QUOTE]
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What caused this pcb to blow out?
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