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CHAPTER 5 PICK-UP/FEEDING SYSTEM
COPYRIGHT
©
1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-9
Figure 5-109
M1
Claw
SL2
DC controller PCB
Registration clutch solenoid drive signal
(RGSLD*)
Pre-registration roller paper detection signal (RPD)
Pre-
registration
roller
paper
sensor
(Q751)
Copy paper
Paper detecting lever
Registration roller
Control ring
Spring clutch
C. Controlling the Movement of Paper
1. Controlling the Registration Roller
The registration roller is controlled by a spring clutch, control ring, pre-registration roller paper
sensor (Q751), and registration clutch solenoid (SL2).
The microprocessor on the DC controller PCB turns on the registration clutch solenoid at a
specific timing in response to the paper detection signal from the pre-registration roller paper sen-
sor. When the registration clutch solenoid turns on, the claw will leave the control ring, and the
drive of the main motor will reach the registration roller to move the copy paper to the photosensi-
tive drum.