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7th July 2009, 11:19 AM
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diyAudio Member
Join Date: Jul 2009
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PM66KI gone pop
I've got a PM66KI that stopped working recently (powers on but the relay does not click). After having a good search on here I noticed R802 is one that often fails from heat. Having identified it on the board it did indeed have some scorch marks on it and I replaced it. After testing it had failed open.
I then tried to power the amp on to find the problem was still occuring. 10 seconds later there was a fizz and a bit of magic smoke from somewhere on the board. I can't identify any blown/burned components so all I can think of is a FET letting go. Technically I'm quite compentant with a soldering iron so replacing bits is not a issue. However I have no idea how amps work so fault finding is a problem! Can anyone point me in the right direction? Thanks in advance 
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