Paper Feeder - Oki B930 Service Manual

• Tray4 Paper Cassette
FRONT SIDE GUIDE
Detection of paper size
The paper size to which the cassette is set is transmitted to the switches S/W1 and S/W3 on
the TRAY 3/4 PAPER SIZE SWITCH by moving these guides. The paper size is detected by
the ON/OFF information of these switches.
Paper sizes that can be automatically detected are as 4.1 Paper Size Control:

Paper Feeder

Since the Tray3 and Tray4 are functionally equivalent in terms of the TRAY 3/4 PAPER SIZE
SWITCH, NO PAPER SENSOR, LEVEL SENSOR and PRE FEED SENSOR, only the compo-
nents of one tray are described here.
The Paper Feeder is a mechanical unit for supplying paper from the Paper Cassette to the
printer. The driving force from the TRAY 1/2 FEED LIFT UP MOTOR on the FEEDER ASSY is
transmitted to the three ROLLER ASSYs to feed paper.
When the ROLLER ASSY (NUDGER) picks up some sheets of paper and the remaining paper
decreases, the ACTUATOR (SUPPORT ASSEMBLY) of the NO PAPER SENSOR lowers
accordingly.
TRAY 1/2 FEED LIFT UP MOTOR
This motor is activated to feed paper and to lift the BOTTOM PLATE. When feeding paper, it
rotates forward to drive the ROLLER ASSY (NUDGER).
TRAY 3/4 PAPER SIZE SWITCH
This TRAY 3/4 PAPER SIZE SWITCH switches for setting the size of paper supplied from
each Paper Cassette. A signal indicating the set size is transmitted as a voltage to the
PWBA MCU F.
F/R CABLE
F/L CABLE
2-48
TRAY CABLE
REAR SIDE GUIDE
BOTTOM PLATE