Other Jams - Canon i-SENSYS MF229dw Service Manual

2
Technical Overview > Pickup And Feeding System > Reversal Delay Jam > Other Jams

■ Other Jams

● Fixing Wrap Jam
OFF
Paper Lead Edge
Sensor
ON
OFF
Fixing Delivery
Sensor
ON
50
(110)
A fixing wrap jam is determined if the Fixing Delivery Sensor (PS701) detects absence
of paper between the time of 50 msec after the Fixing Delivery Sensor (PS701) detected
presence of paper and the time of 635 msec after the Paper Lead Edge Sensor (PS751)
detected absence of paper.
Note :
The leading edge detection margin is 8 mm and the trailing edge detection margin is 20
mm. The leading edge margin is set to prevent the erroneous detection of a wrapping
jam during chattering at paper entry. The trailing edge margin is set long because the
detection time is not stable due to paper springing or other.
● Initial Paper Jam during printing
An initial paper jam is determined if either the Fixing Delivery Sensor (PS701) or the Paper
Width Sensor (PS702) detects presence of paper immediately before the Print Main Motor
started its rotation.
● Door Open Jam
A door open jam is determined when printing is interrupted due to the door open detection
during printing while there is paper at the Paper Lead Edge Sensor (PS751) or the Fixing
Delivery Sensor (PS702). The status value is retained if any jam has been already reported to
the jam status.
● Initial paper presence Jam during warm-up rotation
If either the delivery sensor (PS701) or the paper width sensor (PS702) detects paper at the
start of warm-up rotation, an initial paper presence jam is determined.
2 Technical Overview > Pickup And Feeding System > Reversal Delay Jam > Other Jams
635
fixing wrap jam
detection period
F-2-38
● No-paper detection during cleaning
ON
Solenoid
OFF
200
OFF
Paper Lead Edge
Sensor
ON
If the TOP sensor (PS751) does not detect paper for 1370 ms from 200 ms after the start of
paper feed, the no-paper status is determined.
1370
paper detection
period
Jam
2-32
F-2-39
2-32