Oki OKIPAGE 12i Series, Service Handbook

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2.4 Paper Jam Detection
The paper jam detection function monitors the paper condition when the power is turned on and
during printing. When any of the following conditions arises, this function interrupts the printing
process. If any of the following errors is encountered, printing can be recovered by removing the
jammed paper (by opening the upper cover, removing the jammed paper and closing the upper
cover).
Error Cause of error
Paper input jam
Paper feed jam
Paper exit jam
Paper size error
• The paper is in contact with the inlet sensor when the power is turned on.
• After hopping operation is attempted three times, the leading edge of the paper does not reach
the inlet sensor.
• The paper is in contact with the paper sensor when the power is turned on.
• The leading edge of the paper does not reach the paper sensor within a predetermined feeding
distance since the paper has reached the inlet sensor.
• The trailing edge of the paper does not pass over the paper sensor within a predetermined
feeding distance after the same has passed over the inlet sensor.
• The leading edge of paper does not reach the outlet sensor within a predetermined feeding
distance after the paper has reached the paper sensor.
• The paper is in contact with the outlet sensor when the power is turned on.
• The paper does not pass over the outlet sensor within a predetermined feeding distance after
the leading edge of the paper has reached the outlet sensor.
• The paper size check for manual feeding finds that the paper size is free size.
• The size of the paper is monitored by the inlet sensor 1. The paper is not detected by the inlet
sensor 1 within predetermined feeding distance.
• The inlet sensor 2 detects that the size of the loaded paper is A4 or larger, or smaller than A4.
The detected paper size differs from the paper size set by command or menu.
• The paper size check for manual feeding finds that the paper size is free size.
Hopping
Paper
feed
Paper
feed
Main (drum) motor
Registration motor
Paper end sensor
Inlet sensor
Paper sensor
Outlet sensor
Jam Monitor
Top to top
Top to bottom
Top to bottom
Bottom to bottom
Checking for
paper form
Paper size check
(paper width)
Monitoring
paper
input jam
Monitoring
paper feed jam
Monitoring
paper feed jam
Paper size check
(Paper length)
Monitoring
paper
feed jam
Monitoring
paper exit jam
Paper Feed Timing Chart