Looks like I might be having a go at fixing someone's hifi!
I haven't done much electronics since graduating in 1986; ironic, since it was an electronics degree! (I got into software instead.)
I used to do this sort of thing as a teenager when technology was both simpler and more expensive (relative to income), so it was well worth fixing kit back then. These days most people would just buy a replacement when their system eventually packs up.
This is an old system, but Denon was always considered a pretty good brand so it is worth having a go. Always good to avoid more stuff going to the recycling centre. I have a vague idea what might be wrong with the amp and am curious to see if I am right. If I AM, then the repair should be quite simple.
I don't have any circuit diagrams for the amp though, nor much of my old test equipment or spare parts. If I can't fix the thing quite quickly, then the only other realistic option is to ask a mate up the hill who still works in electronics. He might be able to sort it out.
