CHAPTER 5 PICK-UP/FEEDING SYSTEM
5–2
COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
II. PICK-UP FROM THE CASSETTE

A. Pick-Up Operation

The pick-up roller and the feed roller are controlled by the pick-up solenoid (SL1).
The stack of copy paper inside the cassette is held up by the lifter, and the pick-up roller is
controlled by the pick-up solenoid and is kept away from the surface of the stack.
When the pick-up solenoid turns on, the claws move away from the pick-up gear, and the
drive of the main motor (M1) is transmitted to the pick-up roller and the feed roller.
A single sheet of copy paper is picked up and sent to the feed roller by the work of the pick-
up roller and the separation claws. If multiple sheets should be picked up, the feed roller and the
separation roller would serve to make sure that no more than a single sheet is sent forward to the
vertical path roller.
The copy paper is then moved by the vertical path roller to the registration roller. In response,
the registration roller controls the movement of the copy paper so that its leading edge matches
the image on the photosensitive drum.
PS5
PS4
CL1
CL2
SL1
M1
DC
controller
PCB
Power supply
PCB
Power supply
PCB
Main motor drive
command
Feed roller clutch drive command (FEED_CL*)
Registration roller
clutch drive
command
(RG_CL*)
Pick-up solenoid drive command (PU_SL*)
Registration paper detection signal (RGPDT)
Cassette paper detection signal (CSTPDT)
Registration roller
Photosensitive
drum
Pick-up
roller Vertical
path roller
Feed roller
Separation roller
Figure 5-201