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Dead Dayton DTA-100a that I'm trying to revive

post #1 of 3
Thread Starter 
So a while ago I miraculously revived my friends dying DTA-100a by cracking it open and looking for any connections. So far all I have done was replace the wiring on the power input choke which started to fray. Apparently I got it working though it would pop and crack before warming up fully a few seconds later.

Now it's dead again and when I opened it up there was a strong smell of ozone (the kind of thing you would smell from an electric motor). The only component I noticed that would get hot would be the audio chip though there was no awful smell of burnt electronics. I think the main volume knob/power switch is dead and needs to be replaced. The pops and cracks from earlier seemed to be associated with the volume knob too.

Later tonight I'll try to bypass the knob with an equivalent resistance value and see if the sound comes back.
post #2 of 3
Thread Starter 
bump
post #3 of 3
Thread Starter 
So for anyone else with a similar issue with their DTA-100a it seems to have been caused by the power switch. Apparently the thing would constantly arc every time you turn it on/off and this built up a carbon layer that eventually prevented the thing from turning on. The power switch can be access from the back of the main volume knob. It's held in place by 4 metal braces. Peel them back and pull the plastic cover off. Clean out any carbon deposits in side and it should work again.
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