6
RailKing Doodlebug Electric Engine
Tips on Using PSAs
• You can terminate PSA at anytime by turning off power to the
track for 15 seconds.
• You do not have to be in Forward to use PSA. At the
conclusion of the full sequence, the train will pull away from the
station in whatever direction you were going when you activated
the feature.
• You can use PSA even if you are double-heading with another
engine regardless of whether the second engine is equipped with
a Proto-Sound 2.0 PSA module. If the second engine is not
equipped with PSA at all, you must remember not to leave the
throttle at a high voltage level once you have stopped the engine
to run the PSA. Otherwise, the engine without PSA will begin
vibrating on the track as its motors strain to move the train, since
they cannot be automatically disabled during the PSA cycle. If
the second engine (whether original Proto-Sound or Proto-Sound
2.0) is equipped with PSAs, you may choose to disable it when
used in double-heading operations, so you will not experience
competing PSA sounds. To disable PSAs in an original
Proto-Sound engine, see the operating instructions for that
engine.
