OKIDATA OF2200, Service Manual

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Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation
1.5.02 Hopping
Hopping loads paper from the paper cassette.
During the hopping operation, the registration motor turns in a clockwise direction. This motor drives the
hopping roller, which in turn advances the paper until the inlet sensor 1 switches ON. The registration gear
turns, but the one-way bearing does not allow the registration roller to turn.
After inlet sensor 1 switches ON, the paper is advanced a predetermined length (until the paper reaches
the registration roller).
1.5.03 Feeding
Feeding transports paper through the printer.
After the completion of hopping, the registration motor turns in a counter-clockwise direction. This
counter-clockwise motion drives the registration roller and advances the paper. The hopping gear turns,
but the one-way bearing does not allow the hopping roller to turn.
1.5.04 Charging
Charging applies -1.3 Kvdc to the charge roller. The charge roller contacts the image drum surface.
The charge roller has two layers: a conductive layer and a surface protective layer. The surface layer is
flexible, which assures proper contact with the photosensitive drum.