Fender Prosonic heads up

[Gtr_tech]

One of these came in the other day with the complaint "bad hum, burning smell". One of the 100u caps in the bias circuit spewed its guts due to being cooked by the 15w resistor they are placed right next to. There are 2, and the other one was discolored but hadn't popped its cork yet. The one that did go boom was damn near touching the 15w.

What I did was replace both caps and relocate them to the underside of the pcb so that big resistor doesn't damage them. Just something to look out for.

[tiaka]

Did the amp cut in and out while playing that might be my problem

[Gtr_tech]

I dunno. I had it on just long enough to verify the hum complaint. Chassis came out immediately to investigate the problem.

[Justin Thomas]

Old thread, but I just had to do this to mine. C102 had spewed guts all over its underside, so invisible from the top. Same symptom - hum. Time for a cap job. Glad I stumbled across this one...

Justin