[Kenwood] TS850S AGC time constant switch and antenna tuner noise problem.

[W5XR]

Hi all.  I have two problems with my TS8850S.  First item is the AGC time
constant is permanently in fast mode.  Switching to Mid or Slow does not
change the time constant.  Switching it off does turn it off.  I'm hoping a
loose plug on an PC board somewhere.  I have schematics but have not been
able to locate the time constant switching circuitry.  Any suggestions?
 
Second problem is the Antenna tuner.  It works, but when the motor drives
the caps CW (as viewed from the front) there is a momentary but very loud
screech (best way I can describe it).  When the motors drive the caps CCW,
there is little or no noise.  Any suggestions on this one?  Bad bearings in
the motors or such? 
Any help greatly appreciated.
 
73, Bob W5XR