Canon LBP-2000 Service Manual page 96

3 . Delivery jams
a . Delivery assembly delay jam
A delivery leading edge delay jam or the fixing assembly wrap jam will be identified by the DC
controller as a delivery assembly delay jam.
When the CPU on the DC controller detects the presence of a jam, it will stop printing operation
and indicates the fact to the video controller.
• Delivery Leading Edge Delay Jam
The delivery sensor (PI103) does not detect the leading edge of paper within a specific period of
time after the registration roller starts to rotate to move paper.
• Fixing Assembly Wrap Jam
The delivery sensor detects the absence of paper before a specific period of time has passed after it
detects the leading edge of paper moved by the registration roller.
However, if the paper is 98 mm or less in length, the detection of a fixing assembly wrap jam will
not be executed.
• Sequence for a Delivery Sensor Leading Edge Delay Jam
Main motor
(M101)
Registration clutch
(CL102)
Delivery sensor
jam check
Delivery sensor
(PI103)
• Sequence for a Fixing Assembly Wrap Jam
Main motor
(M101)
Registration clutch
(CL102)
Delivery sensor
(PI103)
Delivery sensor
jam check
Jam message ON
PRINT
Normal
Error
Figure 2-5-16
Jam message ON
PRINT
Normal
Figure 2-5-17
CHAPTER 2
Error
2 - 57