Ampico B Drawer Fault Diagnosis

Hi all you MMDrs.  Does anybody know if there is anything published in
the USA with regards to faults in the Ampico B Drawer and the diagnosis
of those faults, and of course their rectification.

When I purchased my piano about five years or so ago everything worked
with the exception of the Repeat switch.  No great problem.  A couple
of weeks ago I was under the piano and lo and behold I found a tube
that was disconnected.  This tube led to the left hand side of the
drawer so I reconnected it.

Result: good and bad.  The repeat now works but on rewind, when only
a single play is required, the mechanism quickly shunts into play
before the end of the roll and starts to replay unless I hold the
switch manually to prevent it.

I have a copy of the 1929 manual and a couple of MMD Archive items but
they do not help as all appears to be as the diagrams say it should be.
Any help greatly appreciated before I take the tube back off and forget
the repeat switch.

Kind regards from old GB,
Mike Nichols

 [ These two web pages at the MMD Technical site might help you:
 [ http://www.mmdigest.com/Gallery/Tech/Ampico/amp52.htm 
 [   Ampico B Rewind and Repeat System
 [ http://www.mmdigest.com/Gallery/Tech/Ampico/amp52m.htm 
 [   Repeat logic modified
 [ -- Robbie