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Sansui 4000 Opinions?

As far as the outputs go, there should be no unsoldering needed. Take the screws out & then just pull them out. You can test them for dead shorts while they're in place, but you'll have to remove them for any further testing.....since you're going to clean/regrease them you'll do it anyway.
For other components you can meter them in circuit to get a general idea if something is amiss. But I wouldn't just randomly start unsoldering things unless you suspect they're bad. The fewer spots you stick your solder iron, the fewer chances you have of lifting a pad/trace.
Take your time & make sure the unit is working properly before you start restoring it. Check the bias & make sure it can be adjusted correctly. Check the voltages at points indicated in the service manual. Write it all down or make note that they're "good", or fix them if they're not. Doing so will help should you encounter a problem later.
Heed Sansuiman's advice in post #11......seriously.
 
Thanks for all the great advice @PF Sound! And to your point about post #11, I'd be a fool to not heed the advice of a guy who has "Sansui" in his username. :) I do try to take as many photos as possible when in projects but not so much notes. I think in a more complex project such as this (for me, anyway), it would make a lot of sense to take careful, detailed notes.

The unit checks out fine on a dim bulb that I recently built. Crackly output, likely some dirty switches and pots I'd guess, but also low volume in one channel. Haven't really had a lot of time to play with it other than having fun building the dim bulb. Hopefully have some more time to look at it after the holidays.
 
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