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hi..
my peavey classic 50 2x12 , which has been well maintained and cared for since i purchased it 8 months ago (I'm the second owner), recently began losing power (as in, the amp turned itself off) randomly during use. At first, if I simply flipped the power switch back and forth (the switch remained in the ON position when the amp cut out), everything would return to normal for the rest of a session (maybe an hour or two?). Now, I can barely get the thing to turn on, much less remain on for more than ten or fifteen seconds. I opened up the back panel and browsed for obviously damaged components; nothing was immediately apparent until I tried flipping the power switch a few times with the panel off and noticed an ugly white spark on the little tiny PCB that is riveted to the chassis through which all the power connections seem to pass.
Closer observation revealed a burn mark on the solder point through which one leg of a small black ceramic capacitor passes. the cap straddles two points on the board; the wires in contact with these points are a twisted pair with black insulation that trace back to the power switch. The cap looks a little weird; there are some small cracks in it where the wire legs branch out from the ceramic disc.
I'm assuming this cap has blown somehow, but I don't know its value and the little board it's soldered to is permanently attached to the amp chassis. I'm also wary of trying to just swap in a new cap cos I'm not sure if some other electrical problem is the likely culprit..
Any suggestions? I'm pretty new to fiddling with high voltage stuff, so I want to be very sure of myself before I attempt any kind of repair..
Thanks in advance for any help/guidance ya'll can provide..
take care
bryan
my peavey classic 50 2x12 , which has been well maintained and cared for since i purchased it 8 months ago (I'm the second owner), recently began losing power (as in, the amp turned itself off) randomly during use. At first, if I simply flipped the power switch back and forth (the switch remained in the ON position when the amp cut out), everything would return to normal for the rest of a session (maybe an hour or two?). Now, I can barely get the thing to turn on, much less remain on for more than ten or fifteen seconds. I opened up the back panel and browsed for obviously damaged components; nothing was immediately apparent until I tried flipping the power switch a few times with the panel off and noticed an ugly white spark on the little tiny PCB that is riveted to the chassis through which all the power connections seem to pass.
Closer observation revealed a burn mark on the solder point through which one leg of a small black ceramic capacitor passes. the cap straddles two points on the board; the wires in contact with these points are a twisted pair with black insulation that trace back to the power switch. The cap looks a little weird; there are some small cracks in it where the wire legs branch out from the ceramic disc.
I'm assuming this cap has blown somehow, but I don't know its value and the little board it's soldered to is permanently attached to the amp chassis. I'm also wary of trying to just swap in a new cap cos I'm not sure if some other electrical problem is the likely culprit..
Any suggestions? I'm pretty new to fiddling with high voltage stuff, so I want to be very sure of myself before I attempt any kind of repair..
Thanks in advance for any help/guidance ya'll can provide..
take care
bryan
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