Just picked up a Cambridge A500 amplifier as faulty for little more than a few pounds. Hoping to get it working but digital is more my bag so it's going to be a mission :-)
Anyway does anyone have a circuit diagram/service manual ?
Strange fault is that it works perfectly when you switch it on then carries on working for about 20 seconds. After that you get some clipping type cracks and pops which get gradually worse then the channel drops but comes back intermittently for a short time with or without the crackles then dies again.......
THEN even if the channel is apparently dead, if you unplug the amp the channel comes back perfectly every time for maybe 0.5-1 second before the PSU stops giving enough energy.
All I've done is take off the lid and take a look. No obvious blown caps/loose components or anything like that. I'm not expecting someone to immediately diagnose the issue based on the above but if anyone has any likely ideas to point me in the right direction or circuit diagrams etc then it would be appreciated. I've no time tonight but will be having a look tomorrow. At least I have one channel working to compare with the other, a scope and signal generator so should, at least, have the tools.... if not the experience with analogue.