Manualshelf

Specifications

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Principles of Operation Function of Major Components - 36
Frame
When the top cover closes, the seven events described below take place.
Cover Interlock Actuator
Top cover closure actuates the interlock switch on the power supply assembly. There are
three components that work together to actuate this switch.
Top cover actuator: The thin plastic post built into the top cover.
Spring-loaded actuator: The vertical assembly that transfers actuation downward.
Actuator arm: The arm that contacts the interlock switch on the power supply
assembly.
Laser Shutter
A plastic post built into the top cover extends through a cutout in the top of the laser/
scanner assembly. The laser shutter facing the mirror assembly opens, thus allowing the
laser beam to leave the laser/scanner assembly.
Mirror Assembly Shutter
A plastic post built into the top cover presses open the shutter that covers the mirror
assembly. Unless this shutter and the one above are in an open position, the laser can not
reach the photosensitive drum.
Cover Latch
Two latches on the chassis hook onto the underside of the cover to assure tight closure of the
cover. The right cover latch has an integral spring-loaded plate that is actuated by the top
cover release lever.
Jam Release Plate
The top cover presses against the surface of the jam release plate to the left of the laser/
scanner assembly. In a cover-closed position, this plate presses against the
preregistration pinch roller assembly, resulting in a tight gripping surface for paper feed.
In a cover-open condition, the pinch roller does not grip the paper, thus facilitating
removal of paper jams.
Toner Cartridge Latching Mechanism
Top cover closure actuates a cam mechanism that presses and stabilizes the toner cartridge.
See the “Drive and Xerographic (1 of 2)” illustration.
Fuser Idler Gear Actuation
There is a spring-loaded lever on the drive transfer assembly that controls the position of
the fuser idler gear. When the top cover is closed, this lever is pressed, thus completing
the drive train to the fuser assembly.