Canon LBP-1260, Руководство по обслуживанию

Страница: 71 / 218

2
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:
. paper sensor
. Delivery paper sensor
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 and sends
a signal to the
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 within the required time after the paper is picked up.
Regist paper sensor
Normal
Main motor (Ml)
TI: 2.53 seconds cassette). 2.01 seconds tray). 2.55 seconds (lower cassette),
4.00 seconds (envelope feeder)
Figure
2-38
2.
Pick-up stationary jam
The microprocessor detects a pick-up unit stationary jam when the resist paper sensor
detects the sheet of paper the required time after the VERTICAL signal
has been received.
V
(Unit: Seconds)
PRINT
VERTICAL SYNC REQUEST
signal
Jam check
paper sensor
4.95 seconds 4.37 seconds 4.70 seconds 5.77 seconds
4.51 seconds 5.77 seconds (Universal), 4.37 seconds (Envelope feeder)
Figure
2-39