Paper Feeder - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500
Figure 2-31. Paper Cassette
Operating Principles

2.5.2 Paper Feeder

SIZE SWITCH ASSY
With 4 Paper Size Switches are attached directly to the plate, the SIZE
SWITCH ASSY detects paper size and whether or not there is paper in the
paper by the switch ON/OFF combinations by change in position of the SIZE
ACTUATOR.
CASSETTE NO PAPER SENSOR
Detects whether or not there is paper in the paper by change in position of the
CASSETTE N/P ACTUATOR.
LOW PAPER SENSOR
When paper set in the paper gets low, the distance between the BOTTOM
PLATE ASSY and LOW PAPER SENSOR gets shorter. When the Magnet on
the back surface of the BOTTOM PLATE ASSY approaches the LOW PAPER
SENSOR, the LOW PAPER SENSOR detects magnetism, thus sensing that
the amount of paper remaining is low.
FEED SOLENOID
Controls operation (rotation/stop) of the FEED ROLL ASSY by controlling
rotation of the FEED GEAR.
FEED ROLL ASSY
When the FEED SOLENOID operates, the FEED GEAR and FEED IDLER
GEAR mesh. Thus being driven by the P/H MOTOR ASSY, the FEED ROLL
ASSY begins to turn, and the FEED ROLL feeds paper from the paper tray.
After completing an entire turn, the notch in the FEED GEAR stops the FEED
ROLL ASSY from turning by disengaging the FEED GEAR and FEED IDLER
GEAR, thus cutting off drive transmission. This feeds 1 sheet of paper per
revolution.
Revision C
2-24