Picked up a little Fender Princeton 65 DSP for gigging, really clean sound (had to replace the driver after my second gig as it has blown though!)
Recently it’s been ‘intermittently popping’. I’ve left it sitting whilst on, not touching a thing or shaking it, and it randomly pops a few times every few minutes or so. 99% certain this happens post the ‘PWR IN’ jack - any ideas what it could be?
Schematic can be found here: https://www.manualslib.com/manual/1183721/Fender-Princeton-65-Dsp.html?page=13#manual
Recently it’s been ‘intermittently popping’. I’ve left it sitting whilst on, not touching a thing or shaking it, and it randomly pops a few times every few minutes or so. 99% certain this happens post the ‘PWR IN’ jack - any ideas what it could be?
Schematic can be found here: https://www.manualslib.com/manual/1183721/Fender-Princeton-65-Dsp.html?page=13#manual
Based on 30 years of experience as a tech in another solid-state field, this could be a number of things. Since it is a solid-state amp, any one of the numerous sold-state junctions (diodes, BJT's, etc) could have a thermal issue. It could also be a simple solder joint. A connector may have an intermittent connection fault. A resistor could have developed a thermal fault. Time to break out the o-scope and start tracing to see where the pop is entering the circuit.