Troubleshooting - Nikon Motor Drive MD-12 Instruction Manual

TROUBLESHOOTING
Your M D-12 has been designed to make motor drive
photography as simple and trouble-free as possible.
However, should you operate the camera incorrectly
or without clearly understanding what you are doing,
minor "hitches" may occur. If this occurs, please follow
the instructions below.
If the motor drive "jams" during operation, this usually
means that the controls have either been operated
incorrectly or in the wrong sequence, and the coupling
mechanism has disengaged . Should this occur, turn
the MD-12's power switch off and make one exposure
with the camera's shutter release button, remembering,
in the case of the FM (Serial No. below 3,000,000), to
switch over to manual film advance. You may fina that
the motor drive did not finish advancing the film.
If so, complete the film advance using the camera's
film advance lever, then press the shutter release but-
ton. Do not advance the film. Switch the motor drive
back on and, in the case of the FM (Serial No. below
3,000,000), revert to the motor drive mode. The motor
drive should advance the film ready for the next ex-
posure. If this does not clear the malfunction or you
are unable to move the film advance lever at all, do
not try to force the controls. Turn the motor drive
off once more and simply remove the motor drive
from the camera. This will clear the tension in the film
advance mechanism, allowing you to advance or finish
advancing the film and make one exposure, again do
not advance the film . Reattach the motor drive and,
in the case of the FM (Serial No . below 3,000,000),
switch to motor drive operation. When you switch the
motor drive back on, the film should then advance one
frame ready for the next exposure.
Shou Id you trigger the motor drive with the shutter
speed dial set to "B" the absence of an "exposure com-
plete signal" may result in the camera's mirror locking
up and the shutter remaining open. To restore normal
operation in the event of th is happening, merely move
the shutter speed dial away from "B."
At all times during motor drive operation, the film
advance lever shou Id remain flush with the back of
the camera. If you move it ou t to its stand-off position,
the motor drive will stop. Returning the lever to its
flush position will automatically start the motor drive
once more .