Basic Operation - Ricoh A151 Field Service Manual

BASIC OPERATION

5. BASIC OPERATION
When the main switch is turned on, the DF CPU sends the "DF installed"
signal to the copier CPU. Receiving this signal, the copier CPU recognizes
that the document feeder is installed and sends the "DF confirmed" signal to
the DF CPU.
When originals are placed on the original table, the Insert Original indicator
turns off and the DF CPU sends the "original set" signal to the copier CPU to


inform that the originals have been set.
When the key is pressed, the copier CPU sends the "feed-in" signal to
the document feeder. On receipt of this signal, the DF CPU first energizes the
DF motor, then the pick-up solenoid and feed clutch to feed in the bottom
sheet of the original stack onto the exposure glass. The pick-up solenoid and
the feed clutch remain energized until the original's leading edge reaches the
registration sensor. The DF motor turns off shortly after the original's trailing
edge passes the registration sensor. Then, the DF motor pauses and
reverses for a moment to align the edge of the original with the scale.


Then the scanner starts to move (scanner start timing does not depend on
the progress of the original through the DF; it starts at a fixed time after the
key is pressed). When the scanner reaches the return position, the
copier CPU sends the "original change" signal to the DF CPU in order to feed
out the current original and feed in the next original.
SM 9-5 A202/A203