Manual Feed Pickup Unit; Outline; Retry Pickup; Detecting The Size Of Paper - Canon ImageRUNNER 1022iF Service Manual

Chapter 7

7.4 Manual Feed Pickup Unit

7.4.1 Outline

/ / / / iR1018 / iR1018J / / iR1022A / iR1022F / iR1022i / iR1022iF /
Paper is picked up from the manual feed tray under the control of the CPU on the DC controller PCB and using the drive of the main motor (M1). When the manual
feed pickup solenoid (SL5) goes ON, the drive of the main motor (M1) is transmitted as far as the
manual feed pickup roller assembly to rotate the manual feed pickup roller.
The sheets of paper stacked in the manual feed tray are lifted by the work of a spring and forced against the manual feed pickup roller. Thereafter, a single sheet of
paper is separated by the work of the manual feed pickup roller and the separation pad, and is moved as far as the registration roller.
After the paper passes a registration sensor (SR11), the paper reaches the registration roller. At this time the registration roller is at rest, causing the leading edge
of the paper to butt against it to form an arch.
The DC controller PCB turns on the registration clutch (CL1) at specific timing to transmit the drive of the main motor to the registration roller, thereby moving
the paper ahead. The paper reaches the delivery tray after moving through the transfer, separation, and fixing/delivery assemblies.
The deliver tray has a delivered paper full sensor (SR10) to detect that the delivered sheets are stacked fully.
When the total height of the delivered sheets reaches the specified value and the delivered paper full sensor (SR10) turns on, this machine detects occurrence of an
error and displays an error message on the LCD.
M1
SR11

7.4.2 Retry Pickup

/ / / / iR1018 / iR1018J / / iR1022A / iR1022F / iR1022i / iR1022iF /
If the registration sensor (SR11) does not detect paper within a specific period of time after the manual feed pickup roller starts to rotate, the machine will rotate
the manual feed pickup roller once again to execute a retry pickup operation. If the registration sensor (SR11) still does not detect the leading edge of paper after
executing a retry pickup 3 times, the machine will identify the condition as a jam and will indicate a jam message on the LCD in its control panel.

7.4.3 Detecting the Size of Paper

/ / / / iR1018 / iR1018J / / iR1022A / iR1022F / iR1022i / iR1022iF /
The size of paper in the manual feed tray is detected using the registration sensor (SR11) with reference to the length of paper. In fax mode, if paper of a size different
from the size selected from the control panel is placed, the DC controller will identify a paper size
mismatch at the end of printing and indicate a message on the LCD.
7-4
SR10
SR5
CL1
SL2
SR12
F-7-4
0013-1112
0013-1113
0013-1114