Ricoh Aficio IS420 Service Manual page 34

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DETAILED SECTION DESCRIPTIONS
PAPER MISFEED DETECTION
J1: The leading edge of the original does not reach the feed sensor within 3 s
(binary picture processing) or 9 s (grayscale processing) after the
document table has been lifted up.
J2: The leading edge of the original does not reach the read sensor within the
time required for feeding the distance between the feed sensor and the
read sensor + 30 mm.
J3: The leading edge of the original does not reach the feed out sensor within
the time required for feeding the distance between the feed sensor and
the feed out sensor + 30 mm.
J4: The trailing edge of the original does not pass through the read sensor
within the time required for feeding the original length + 30 mm after the
feed sensor has been activated.
J5: The trailing edge of the original does not pass through the feed out
sensor within the time required for feeding the original length + 30 mm
after the feed sensor has been activated.
If an original jam or an original non-feed are detected, the paper transport
motor, paper feed motor, and the xenon lamp turn off. Then, the appropriate
LEDs inform the user of the machine's status.
If an original remains in the ADF, the original is fed out and the paper
transport motor stops.
2-16
October 9th, 1995

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