Multi-Feeder Retry Pick-Up - Canon GP160DF Service Manual

2. Multi-feeder pick-up drive mechanism
The multi-feeder pick-up roller is driven by the main motor, via the multi-feeder pick-
up drive assembly gear. The pick-up timing is controlled by multi-feeder pick-up solenoid
drive signal (SL302D), which is sent from the DC controller PCB.
The construction of the multi-feeder pick-up drive assembly is illustrated in Figure 7-
403.
When the main motor rotates, the pick-up drive relay gear rotates simultaneously.
When the multi-feeder pick-up solenoid drive signal (SL302D*) is output from the DC
controller PCB, and the solenoid comes ON, the cogless gear is rotated slightly by the
spring tension. This causes the rotation to be transmitted to multi-feeder pick-up drive
gear, and the pick-up roller rotates.
When the pick-up roller has rotated once, the cogless gear's cogless part, and the
pick-up drive relay gear position match, therefore drive is no longer transmitted to the
Multi-feeder drive axis gear and the pick-up roller rotation stops.
C.

Multi-feeder retry pick-up

When paper is not picked-up even when the multi-feeder pick-up roller is rotating,
retry pick-up operation occurs.
The DC controller PCB's CPU counts the time from when the multi-feeder pick-up
solenoid (SL301) comes ON. If the registration sensor (PS302) cannot detect the
paper's leading edge within a designated period of time, the pick-up solenoid comes ON
again and the pick-up operation is retried. Even when the retry pick-up is actuated
again, if the pick-up sensor does not detect the paper's leading edge within the specified
period of time, the retry operation is tried for a second time. If, during this second pick-
up retry paper does not arrive at the registration sensor, it judges there is a jam, and a
jam message is displayed on the control panel's display.
COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 7 PICK-UP/FEEDING SYSTEM
7-9