2
2
2-31
2-31
Technical Overview > Pickup And Feeding System > Detecting Jams > Other Jams
Technical Overview > Pickup And Feeding System > Detecting Jams > Other Jams
■
Other Jams
●
Fixing Wrap Jam
fixing wrap jam
detection period
50
OFF
Paper Lead Edge
Sensor
Fixing Delivery
Sensor
ON
OFF
ON
635
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.
F-2-39
●
No-paper detection during cleaning
OFF
Solenoid
Paper Lead Edge
Sensor
ON
OFF
ON
Jam
200
paper detection
period
1370
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.
F-2-40
Summary of Contents for MF4500 Series
Page 222: ...5 5 Adjustment Adjustment Mechanical Adjustment ...
Page 224: ...6 6 Trouble Shooting Trouble Shooting Test Print Trouble Shooting Items Version Upgrade ...
Page 230: ...7 7 Error Codes Error Codes Overview Error Codes ...
Page 234: ...8 8 Service Mode Service Mode Overview COPIER FEEDER FAX TESTMODE ...
Page 251: ... Service Tools Solvent Oil List General Circuit Diagram General Timing Chart Appendix ...