OK, let's continue with driver boards...
As you can see they have one interesting detail; drivers transistors are different on those two driver board, but they are genuine, and Sansui used the both pairs in theirs amplifiers as driver transistors. But it is interesting what they are not the same pair on the both channels.
... preparing for cleaning connector
... again glue
... what I am going to replace
... in the middle of desoldering job
... glue again
... is it clean now
... what I replaced at those two boards
... and one view below
... and one above
so what I have done until now