Paper Feed And Delivery System; Overview - Canon PAPER DECK-C1 Service Manual

II. PAPER FEED AND DELIVERY SYSTEM
A.

Overview

The paper deck driver PCB starts the paper feed operation when it receives the paper
feed command from the option controller PCB. Paper fed by the Pick up roller is trans-
ported to the feeder assembly by Pick up/feeding roller and the separation roller. The reg-
istration roller corrects any skew feed in the paper and then stops.
The paper deck driver PCB causes the paper feed motor (SPM3) to rotate. This caus-
es the Pick up roller, Pick up/Feedig roller and the separation roller to turn.
At the same time, after the paper deck driver PCB causes the motor (SPM1) to rotate,
the paper feed solenoid (SL1) is turned on. This lowers the Pick up roller to the surface
of the paper. As a result, the rotating Pick up roller feeds the paper to the feeder assem-
bly. The paper transported to the feeder assembly goes through the registration paper
sensor (PS1) and stops temporarily when it reaches the registration roller. When the
paper deck driver PCB subsequently receives the paper feed command it causes the
paper feed motor (SPM3) and the delivery motor (SPM2) to turn. At the same time, the
registration roller clutch (CL1) is turned on. This causes Pick up/feeding roller, the regis-
tration roller and delivery roller 2 to turn, and the paper is fed to the printer assembly.
There are two photo-interrupters (PS1 and PS2) in the delivery path that detect when
the paper reaches the path, and when it goes through it.
The paper deck driver PCB assembly assumes that a paper jam has occurred when
the paper does not reach or pass the sensors (in the paper feed path) within a specified
time. It then stops operation and notifies the option controller PCB that a paper jam has
occurred.
COPYRIGHT © 1999 CANON INC.
CANON 2 × 500 SHEET PAPER DECK-C1 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 OPERATION OVERVIEW
2-5