Ricoh infotec 3671F Service Manual page 31

July 30th, 1996
2. Paper Feed Mechanism (Standard Tray)
[A]
[B]
[A]: Main motor
Paper Feed Sequence
When the paper pick-up solenoid [B]
is turned on, the motor rotation is
transferred to the paper pick-up roller
[C] by the spring clutch [D].
When the solenoid is turned on, it
allows the tray lifting cam [E] to
rotate. This allows the bottom plate
[F] to be pushed up by the spring.
The top sheet of paper in the tray is
fed by the paper pick-up roller. The
paper feed solenoid is then turned off.
The separation pad [G] prevents
multi-feeding.
The paper activates the registration sensor [H]. This sensor warns the printer
that a sheet of paper is coming, to initialize the laser engine. It is also used
for paper size and jam detection. If the paper size is determined not to match
the selected paper size, a paper size error is detected. The machine stops
printing and indicates the user of the incorrect paper size, but the image data
is retained and will be printed out when the paper is reset in the tray.
When the solenoid is turned off, the paper feed roller stops and the bottom
plate returns to the original position.
The paper end feeler [I] drops into the slot in the bottom plate to detect paper end
when the paper tray is empty.
[D] [D]
[C]
H528D524.wmf
[H]
2-14
DETAILED SECTION DESCRIPTIONS
[F]
PRINTING
[E]
H528D522.wmf
[G]
H528D521.wmf