BobMaximus
pfm Member
1. Power on. No load. No input signal. Temp of output trannies on faulty channel gradually increases to over 100C in 2 minutes. Lightbulb current limiter gradually brightens. Right channel unaffected.
It could just be a problem with the heatsinking of the output transistors? Are they screwed down properly or has the paste dried out? If the heatskink itself isn't getting warm, then it's certainly that. Thermal runaway is the expected behaviour if so.