Ricoh FT5233 Service Manual page 667

12 February 1992 BASIC OPERATION
When the scanner reaches to the return position, the main system's CPU
sends the invert original signal to the DF CPU in order to make a copy of the
front side. The original is inverted in the same way as for back side copying.
3. Semi-automatic Document Feed
If a single original is inserted into the original table and copied, the DF shifts
to the semi-automatic feed mode and lights the Auto Feed indicator. The
Auto Feed indicator remains on for four seconds after the main system's
main motor stops. If another original is inserted within that four-second
period, it is automatically fed and copied.
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