Canon LBP-1260, Руководство по обслуживанию

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2
B. Pick-up/Feed System
The
envelope feeder pick-up motor is
a stepping motor that rotates forward or
backward and controlled by the envelope
feeder driver PCB.
the motor rotates
forward, all of the envelope rollers rotate,
while only the upper separation roller and
the feed roller rotate when the motor
rotates backward.
When the envelope feeder driver PCB
receives a 1st Start command from the DC
controller, it runs the pick-up motor
forward for about 1.8 second, pauses for
0.1 seconds, then runs the motor
backward for about 2.3 seconds. One
envelope is
up and fed into the
printer by the oblique rollers so that its
end touches the left side plate to correct
skew. The envelope stops when it reaches
the resist paper sensor
it receives a 2nd Start command, the
envelope feeder driver PCB runs the motor
backward for about 2.8 seconds to feed the
envelope again.
DC controller PCB Pick-up motor driver PCB
drum
Envelope feeder driver PCB
Envelope feeder
separation rollers
Envelope feeder
feed roller
Envelope feeder
pick-up motor
Regist paper sensor
Transfer charging roller