Avante On/Off issue

[TinCanAlley]

Originally Posted by Electronic M

When I get around to fixing the no-power issue on my 1980 remote CCII I may have to analyze that circuit and see if I can add a switch to make it default to on when line power is applied as it's plugged into a switched outlet that comes on when my basement signal rack gets power...The non-remote CCII it replaced was left switched on so if I saw it running I knew my signal rack was on (I could also choose what material was on screen by watching it).

When the power switch or remote power isn't working, it is always on when plugged in. I know when it is working again as when I plug it in, it is off and I need the remote to turn it on. Of course after this, the remote no longer turns it off and in manual the power switch doesn't turn it off, so I unplug it. Since it is intermittent, I'm hoping it's failed capacitors. My guess is the triac will either work, or it won't. Not sure about the optocoupler. I figure that since it's from the early 70s, it's not an LED inside.

[TinCanAlley]

I've finished recapping the remote control board. The smaller trigger caps had high ESR and were around 25% above value. One was 75% below (2.2uf read .52). I also decided to recap the audio board since I had everything to do it.

I cleaned up the triac and found they they used 2 mica insulators (mistake at factory?) and a ton of thermal paste. Guess they didn't believe in using it sparingly. The way the stuff hardened, and the amount, I'm sure it was acting as more of an insulator than a transfer. I don't have any of the white thermal grease, but I do have a tube of CPU thermal paste. I'm sure it will be better than the stuff from 50 years ago. Also going to use a ceramic insulator instead or mica.