Canon LBP-860, Руководство по обслуживанию

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CHAPTER 2
B. Pick-up/Feed System
The paper feeder pick-up motor is a
stepping motor rotates or
backward and is controlled by the paper
feeder driver PCB.
When the paper feeder driver PCB
C. Paper Jam Detection
Paper jam during pick-up or feeding from
the paper feeder is detected in the same
way as for printer paper jam detection.
See page 2-33 for details.
receives a 1st Start
command
from the DC
controller, it energize the paper feeder pick-
up roller clutch solenoid
for 0.25
seconds. then after 0.1 seconds, runs the
motor forward for about 1.4 seconds.
The pick-up roller runs through one
turn, and the feed roller is turned at high
speed. The motor is then run backward for
about 1.2 seconds to turn the feed roller,
and paper is fed into the printer.
The paper is fed by the oblique rollers so
that its end touches the left side plate to
correct skew. The paper stops when it
reaches the regist paper sensor
When receives a 2nd Start command,
the paper feeder driver PCB runs the motor
backward for about 2.8 seconds to feed the
paper again.
2-64
2-61