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RailKing SD-90 MAC Operating Manual
REVERSE UNIT LOCK-OUT OPERATION
ProtoSounds® unique design eliminates the need for a lock-out switch on
the locomotive by allowing the customer to lock the engine into any
directional state (forward, neutral or reverse) from the transformer. This
will allow users to run the engine on layouts equipped with block signals or
stop stations which would normally cycle the engine back into neutral. The
feature must be first turned on by accessing RESET Feature 40 (See section
entitled Using RESET To Program ProtoSounds® on page 17).
LOCKING THE ENGINE INTO FORWARD OR
REVERSE
To lock the engine into Forward or Reverse, use the transformer throttle to
enter Forward or Reverse (whichever state you want to lock the engine into)
and while the engine is moving press the whistle button. WHILE THE
HORN IS BLOWING TURN THE THROTTLE OFF AND THEN LET
GO OF THE WHISTLE BUTTON. After about one second, you will hear
a short horn blast. QUICKLY TURN THE THROTTLE BACK ON
AGAIN. Your engine is now locked into Forward or Reverse and it will
remain so until you unlock the engine, even if you wait a year to run your
engine again.
UNLOCKING THE ENGINE
Unlocking the engine is a similar procedure. WHILE THE ENGINE IS
MOVING, PRESS THE WHISTLE BUTTON. WHILE THE HORN IS
BLOWING, TURN THE THROTTLE OFF AND THEN LET GO OF
THE WHISTLE BUTTON. After three seconds without power you will
hear one chime of the RESET bell. TURN ON THE POWER AGAIN. Your
engine is now in RESET and will operate normally once you interrupt
power and enter the forward direction.
LOCKING THE ENGINE INTO NEUTRAL
To lock the engine into the NEUTRAL position, PUT THE ENGINE IN
NEUTRAL AND WITH THE THROTTLE STILL ON, PRESS THE
WHISTLE BUTTON. WHILE THE WHISTLE BUTTON IS BEING
PRESSED, TURN OFF THE THROTTLE AND LET GO OF THE
WHISTLE BUTTON. After about one second, you will hear a short blast
of the horn. QUICKLY TURN THE POWER BACK ON AGAIN. Your
engine is now locked into NEUTRAL.
