Paper Feed And Misfeed Detection Timing - Ricoh A219 Service Manual

6.4 PAPER FEED AND MISFEED DETECTION TIMING

Start Key
Main Motor
0.30
Upper Tray
Paper Feed Clutch
Upper Relay Roller
Clutch
Registration Clutch
Registration Sensor
Exit Sensor
The registration sensor and the exit sensor are used for misfeed detection. If
the CPU detects a misfeed, the Check Paper Path and the Location
indicators turn on.
Just after the main switch is turned on, the CPU checks these sensors for
any jammed paper.
During the copy cycle, the CPU performs four kinds of misfeed detection. The
following explains jam detection timing for copying on A4 sideways paper
from the upper paper tray unit.
A
(1): Checks whether the registration sensor is actuated within 2.05
seconds after the main motor starts rotating.
A
(2): Checks whether the exit sensor is actuated within 4.48 seconds after
the main motor starts rotating.
A
(3): Checks whether the copy paper has passed through the registration
sensor 6.50 seconds after the main motor starts rotating.
A
(4): Checks whether the copy paper has passed through the exit sensor
6.78 seconds after the main motor starts rotating.
A A
NOTE:
(1) and
A
paper. (3) and
copy paper. The detection timing for
the copy paper size in use.
SM
CÓPIA NÃO CONTROLADA
0
A4 sideways
0.55
0.30 0.10
2.13
2.05
A
(1)
(2) are detected from the leading edge of the copy
A
(4) are detected from the trailing edge of the
11-13
CÓPIA NÃO CONTROLADA
PAPER FEED
4.48
A
(2)
A A
(3) and (4) will vary with
(seconds)
6.50
A
(3)
6.78
A
(4)
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