Mg15dfx Amp issue
After playing guitar for 3 to 4 min, my amp starts rushing (like if someone was hammering rapidly on a microphone). I tried several things to locate the issue and nothing came up. I am pretty sure this is nnot a connectivity issue. The best would be to have the schematic for my Mg15dfx...
Music - Marshall - Mg15dfx 15-Watt Combo Guitar Amplifier
Answers & Comments
Most of these use an amplifier chip in the TDA family of 5 or 7 pin audio amps.
If you play real loud you may overheat the chip and it will go into shutdown to protect the chip.
Sometimes htey don't put adequate thermal conductive grease on the chip causing it to overheat.
Remember this is a small practice amp, not a powerhouse.
It sounds like it is going into "motorboating" as it is called.