Canon MF720 Series Service Manual page 55

● Stationary jams
Pickup stationary jam
This occurs when the trailing edge of the paper is not detected by the registration sensor
re-pickup.
*
: SR4
Fixing / delivery stationary jam
This occurs when the trailing edge of the paper is not detected by the fixing delivery sensor
the trailing edge of the paper is detected by the registration sensor
*1
: SR4
*2
: SR8
● Other jams
Fixing seizure jam
This occurs when the fixing / delivery sensor (SR8) detected the leading edge of the paper but the sensor went off before starting
the fixing / delivery stationary detection.
*
: SR8
Internal paper remaining jam
When the sensor below detects "Paper Sensor" before-and-after Power on, Door close, Print operation.
• Paper feeder pre-registration sensor (SR1)
• Registration sensor (SR4)
• MP tray pre-registration sensor (SR7)
• Fixing delivery sensor (SR8)
• Fixing arch sensor (SR10)
• Pre-registration sensor (SR12)
Duplex re-pickup jam
This occurs when the leading edge of the paper is not detected by the registration sensor (SR4) within the pre-defined duration
elapsed from starting reversing.
Open door jam
This occurs when any of sensors detected paper in the device and the door opening is detected during print jobs.
*1
.
47
2. Technical Explanation
*
within the pre-defined duration after
*2
within the pre-defined duration after