Pickup Unit And Stopper - Canon DADF-AA1 Service Manual

Chapter 3
d. Stream reading
When the leading edge of the document reaches the reading point, an image leading edge signal is sent to the host machine to start stream reading. "Stream reading"
is a scan mode in which a document is moved on the optical system's glass using the platen roller.
The read image is stored in the memory of the host machine.

3.4.2 Pickup Unit and Stopper

The pickup unit consists of a pickup roller and feed roller. When the print start key is pressed or a document pickup signal is input, the pickup/feed motor (M1)
turns in the reverse direction to lower the pickup unit via the pickup clutch (CL1), turning the pickup roller and feed roller to feed the document. The stopper rises
in conjunction with the pickup roller unit. When the document is picked up, the separation pad and separation plate prevent multiple sheets from being fed together.
When the document is fed to the registration roller to be looped, the registration clutch (CL2) operates and the power of the pickup/feed motor is transmitted to the
registration roller to feed the document.
Pickup clutch (CL1)
3-12
M1
Read roller 2
Platen roller
LED
Read glass
F-3-15
Pickup/feed motor
Stopper arm
Feed roller
F-3-16
Pickup roller
Stopper arm
Separation pad unit
0024-6993
Document