Paper Feed And Misfeed Detection Timing - Ricoh A219 Service Manual

PAPER FEED AND REGISTRATION

10.7 PAPER FEED AND MISFEED DETECTION TIMING

Start Key
Main Motor
Tray Paper Feed Clutch
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 A4 sideways paper.
A
(1): Checks whether the registration sensor is actuated within 2.01 seconds
after the ! key is pressed.
A
(2): Checks whether the exit sensor is actuated within 4.97 seconds after
the ! key is pressed.
A
(3): Checks whether the copy paper has passed through the registration
sensor 7.45 seconds after the ! key is pressed.
A
(4): Checks whether the copy paper has passed through the exit sensor
7.80 seconds after the ! key is pressed.
A A
NOTE: (1) and
A A
(3) and
The detection timing for
copy paper size in use.
A219
CÓPIA NÃO CONTROLADA
0
A4 sideways
0.10 0.35
0.13
2.09
2.01
A
(1)
(2) are detected from the lead edge of the copy paper.
(4) are detected from the trail edge of the copy paper.
A
(3) and
2-48
CÓPIA NÃO CONTROLADA
4.97
A
(2)
A
(4) will vary with the
(second)
7.45
A
(3)
7.80
A
(4)
A219D526.wmf
SM