Brother LX-1200 Owner's Manual page 27

Note
-The type of the currently installed cartridge can be viewed through the window in the top cover.
-Store the film cartridge at below 113°F (45°C).
(4) Carefully install the new film cartridge, square
end down, film slit facing towards the front of
the machine.
Note
-Make sure that the shutter of the cartridge is
completely closed
cartridge.
-Check the position of the top edge of the film
before installing cartridge. It should be aligned
with the cutting line of the cartridge. If
necessary, cut away any excess film.
-Make sure that the top edge of the film lays
across the lower roller.
(5) Return the roller holder to its original position
and press the roller holder levers as illustrated
until it is secured into position. You will hear the
roller holder click into place.
(6) Close the top cover.
(7) Turn the POWER dial to Cutter Off, Border or
No Border. Press the Feed button until you
can see the edge of the film to remove any
slack from the film.
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before installing the