Ricoh FT4215, Service Training Manual

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5. BASIC OPERATION
1. One-sided Original Feed
When an original is inserted face up into the DF, the Insert Original indicator
light goes out and the DF informs the copier CPU that originals have been set.
When the Start key is pressed, the copier CPU sends the feed-in signal to
the DF. On receipt of this signal, the DF energizes the pick-up solenoid, the
feed-in solenoid, and the belt drive motor in order to feed-in the bottom sheet
of the original stack onto the exposure glass. The pick-up solenoid and the
feed-in solenoid remain energized until the original leading edge reaches the
DF registration sensor. The belt drive motor turns off shortly after the
original’s trailing edge passes the DF registration sensor.
While feeding the original, the DF registration sensor and the paper width
sensor check the original size.
Just when the original trailing edge has passed the DF registration sensor,
the DF CPU sends the copy start signal to the copier.
When the scanner reaches the return position, the copier CPU sends the
feed-out and the feed-in signals to the DF CPU in order to exchange the
original with the next original. At this time, the scanner begins returning to the
home position.
When the scanner comes to the return position after scanning the last
original, the copier CPU only sends the feed-out signal in order to feed-out
the last original.
FT4220/4222 3-6 STM