Canon LBP 2460 - B/W Laser Printer, Service Manual

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Figure 2-8-3
The upper separation roller is driven by the motor through a torque limiter.
In a normal situation, the upper separation roller imparts a rotational force in the same
direction as the pick-up and lower separation roller (shown by the white arrow in top figure 2-8-
4). However, the upper separation roller, envelope, and lower separation roller are all in contact
with each other. Therefore, the upper separation roller is forced to rotate in the opposite direction
(in the direction of the black arrows in middle figure of 2-8-4) through the movement of the
envelope, which is driven by the lower separation roller.
Figure 2-8-4
CHAPTER 2
2 - 69
PRINT signal (/PRNT)
VERTICAL SYNC signal (/VSYNC)
Main motor (MT1)
Envelope feeder pick-up motor (SMT11)
Pick-up command
Registration sensor (PS1)
Fixing unit delivery sensor (PS1403)
(Unit: Seconds)
Power- ON
STBY
INTR
PRINT STBY LSTR
About 1.0
2nd Start 1st Start 2nd Start 1st Start
Forward Backward
About 1 About 2.7 About 1 About 0.1
Lower separation roller
Lower separation roller
Pick-up roller
Pick-up roller
Envelope
Envelope
Normal
Multifeed
Pick-up roller
Upper separation roller
Lower separation roller
Envelope
Upper separation roller
Upper separation roller