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E. Paper Jam Detection
To detect the presence of paper and whether or not the paper has been fed correctly, the
following paper sensors are provided:
. Resist paper sensor (PS602)
. Delivery paper sensor (PS20 1)
The microprocessor (CPU) determines if a paper Jam has occurred by checking whether paper is
present at the sensor within the amount of time specified in the memory.
If it detects a jam, the microprocessor immediately stops printing. and sends
video controller to notify it.
1.
Pick-up unit delay jam
The microprocessor detects a pick-up unit delay jam if the paper does not reach the resist
paper sensor (PS602) within the required time after the paper is picked up.
Regist paper sensor (PS602)
Main motor (Ml)
TI: 2.53 seconds lupper cassette). 2.01 seconds (multi-purpose
4.00 seconds (envelope feeder)
2.
Pick-up unit stationary jam
The microprocessor detects a pick-up unit stationary jam when the resist paper sensor (PSSOZ)
detects the sheet of paper within the required time after the VERTICAL SYNC signal (/VSYNC)
has been received.
VERTICAL SYNC REQUEST
signal (/VSYNC)
Jam check
4.51 seconds IExecutIve). 5.77 seconds (Universal), 4.37 seconds (Envelope feeder)
Normal
tray). 2.55 seconds (lower cassette),
2-38
Figure
(Unit: Seconds)
V
PRINT
2-39
Figure
a signal to the
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