In the 06.01.03 MMD, Sol Feivish requested a manual on the PianoLodeon.
There isn't any manual on the PianoLodeon; only a single sheet of paper
came with the instrument with playing instructions.

However, there are two articles that might be useful.  The first is
by Harold Sims, "How to Tune up the Piano Lodeon", which appeared in
the Spring 1994 issue of the Journal of Mechanical Music.  The second
article is by Mike Kitner, "Rebuilding Chein PianoLodeon", which is
in the MMD Archives, 1999.03.12, at
http://mmd.foxtail.com/Archives/Digests/199903/1999.03.12.05.html

Ed Schmidt - Schmidt's Music Rolls
Easton, Maryland
http://www.music-rolls.com/