Pick-Up And Feed Operation - Canon CLBR 460ps Service Manual

B. Pick-up and Feed Operation
The paper size and presence of a cassette are detected by three switches (SW3001, 3002, and
3003) on the paper feeder driver PCB. The relationship between the combinations of switches
and paper sizes are listed in the table 2-8-1.
The paper feeder pick-up solenoid is controlled by the signal from the printer via the paper
feeder PCB. The paper feeder is driven by the printer pick-up motor (M2) via gears.
After receiving a PRINT signal (/PRNT), the DC controller runs the pick-up motor (M2) when
it detects the home position (HP1) for the first color image formation.
The DC controller turns ON the paper feeder pick-up solenoid (SL3001) in a prescribed peri-
od of time after the pick-up motor starts. The pick-up motor turns the paper feeder pick-up
roller to pick up paper.
After the paper is separated from any extra sheets by the separation roller, it is fed into the
printer with the paper feeder feed roller and printer feed roller.
The subsequent operations are the same as for cassette pick-up.
Paper feeder PCB
SL3001: Paper feeder pick-up solenoid
PS3001: Paper feeder paper detection sensor
SW3001: Paper feeder paper size detection switch
SW3002: Paper feeder paper size detection switch
SW3003: Paper feeder paper size detection switch
DC controller PCB
Feed PCB
M1
Cassette
SL3001
SW3001
SW3002
SW3003
Figure 2-8-2
CHAPTER 2
PS3001
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