Deleted
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Post by Deleted on May 21, 2012 13:31:39 GMT
Swap the L and R audio opamps from channel.
See if the problem shifts channel.
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joethearachnid
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Old head on young shoulders.
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Post by joethearachnid on May 21, 2012 14:17:53 GMT
Okay, so I swapped each of the opamps individually and checked to see if the noise remained for each opamp. It stayed the same throughout on the right channel but after I changed the final pair and switched on the static remained for a short time, them there was a click/pop and the channel went back to being silent. It seems to play music just fine. Very confused. -JoetheArachnid
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Deleted
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Post by Deleted on May 21, 2012 14:37:15 GMT
While playing try pushing on the board itself (bending it a bit) or tapping on it. It might be a dodgy solder joint or DIP-socket.
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joethearachnid
Been here a while!
Old head on young shoulders.
Posts: 380
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Post by joethearachnid on May 21, 2012 15:50:54 GMT
Tapping the ICs sometimes produces a mild hum, but this seems to be rectified by either putting the lid back on the case or restarting the amp. I haven't been able to reproduce anything close to the static I heard before.
-JoetheArachnid
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joethearachnid
Been here a while!
Old head on young shoulders.
Posts: 380
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Post by joethearachnid on May 22, 2012 17:19:08 GMT
Problem recurred today so I whipped out the board and went over the solder joints on the right channel, and eventually found a distinctly loose capacitor leg join (C10 or C11) and re-flooding that seems to have done the trick. Nothing to blame but my own shoddy workmanship. -JoetheArachnid
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Deleted
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Post by Deleted on May 22, 2012 18:37:37 GMT
C10 or C11 are decoupling caps on the left channel.
Since the fault did not change channels with the opamps it is most likely something in the power supply circuit. If it starts to act up again PM me and we will debug it.
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