Tapco 4400 Sticky Sliders/Faders

[lukegalea16]

Hi! I know that this one has been asked before (even on other forums).

I am currently servicing a Tapco 4400 for a friend of mine and have the following issues:

1. Sticky Faders which have improved after cleaning with alcohol
2. Channel 1 reverb randomly drops out sometimes and takes a while to start working again
   1. Perhaps there is a cold joint?
3. Channel 2 Reverb/EQ has a very low output - perhaps a bad op-amp or capacitor?

Thanks! I look forward to hearing your suggestions. I'm obviously going to have a look at the service manual to identify the signal paths.