Feed-In Unit; Original Feed-In - Ricoh FT7770 Service Manual

30 April, '89

FEED-IN UNIT

1. Original Feed-in

When the main switch is turned on, the Insert Original indicator lights. It
stays on until originals are inserted to the feed-in position.
sensor detects the originals.) When originals are inserted, the ADF mode is
automatically selected.
selected by pressing the respective keys on the copier.
When the Start key is pressed, the copier sends the feed-in signal to ener-
gize the feed-in motor.
rollers then start turning to feed in the original.
presses the originals down against the pick-up rollers to create enough fric-
tion between the pick-up rollers and the original. The friction tabs allow
only the bottom original to pass.
When the pick-up rollers have completed one rotation, the disk on the left
side pick-up roller shaft activates the one-turn, sensor. The CPU then starts
the feed-in motor turning in the opposite direction. This causes the pick-up
rollers and separation rollers to stop turning, but the relay rollers continue
to turn in the same direction by means of the dual transmission drive
mechanism to feed the original to the transport unit.
The size sensor measures the length of the original as it feeds the original
to the transport unit.
count.
The ADF and SADF modes can also be manually
The pick-up rollers, separation rollers, and relay
The width of the original is determined by pulse
7-10
(The feed-in
The pressure mylar