COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
CANON iR1200/iR1300 Series REV. 0 AUG. 2002
CHAPTER 4 OPERATION
4-44
9.3 Detecting an Original Jam
9.3.1 Outline
The ADF is equipped with 2 sensors to detect original jams. The CPU on the host
machine’s image processor PCB checks the presence of paper over the sensor at such times
as stored in advance; if it identifies a jam, it turns off the ADF motor (M3) and indicates a
jam message on the LCD.
9.3.2 Types of Jams
The machine identifies a jam as one of 6 types. When a jam has occurred, be sure to re-
move it, open and then close the ADF, place the original once again, and start over.
a. Registration Sensor Delay Jam
After separation is started, the registration sensor (PS7) does not detect the leading edge
of paper within a specific period of time.
b. Registration Sensor Stationary Jam
After the registration sensor (PS7) detects the leading edge of paper, it detects the trailing
edge of paper before a specific period of time.
c. Original size error
After the registration sensor (PS7) detects a original leading edge of paper, it detects the
trailing edge of paper before a specific period of time.
d. Original Delivery Sensor Delay Jam
After the registration sensor (PS7) detects the leading edge of paper, the original delivery
sensor (PS8) does not detect the leading edge of paper within a specific period of time.
e. Delivery Sensor Stationary Jam
After the registration sensor (PS7) detects the trailing edge of paper, the original delivery
sensor (PS8) does not detect the trailing edge of paper within a specific period of time.
f. ADF Open Jam
While an original is being moved, the ADF (copyboard cover) open/close sensor (PS2)
detects a condition indicating that the ADF is open.
F04-903-01
PS7 (for jam a, b, or c)
PS8 (for jam d or e)
PS2 (for jam f)
