Lens/Mirror Posltioning - Ricoh FT5540 Service Manual

31 August 1989
3.5 LENS/MIRROR POSITIONING
Lens Drive
The lens drive motor (stepper motor) [A] changes the lens position according to the selected
reproduction ratio to provide the proper horizontal magnification between the lens and the
drum's surface.
The output gear of the lens drive motor engages the gears [B] of the lens drive pulley. The
lens drive wire [C] is wrapped around the lens drive pulley and is connected to the lens drive
bracket [D]. The rotation of the lens drive pulley moves the lens back and forth in discrete
steps.
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