The amp had shorted Mos-fets which I replaced. At idle, it draws about 1/2 amp and appears fine. After about 2 minutes it gradually increases current draw and the left channel output transistors get hot at which point I shut it down. I pulled the output transistors and they check out fine. I even replaced them as I had some NTE equivalants and the same thing happens. Any idea where to go from here?
Probably some bad solder joints. When I have a broken amp I always start re-soldering all joints first. ( even if they look fine, they dont have to be).
sdoom is probably correct. Look closely at the biasing circuit components. The connections often fail on the bias transistors (Q565 in the left channel).
- Status
- Not open for further replies.