Friction Roller Release Mechanism - Ricoh FT5540 Service Manual

7. FRICTION ROLLER RELEASE MECHANISM

In the ADF mode, when the original activates the original entrance sensor [A], the DF CPU
energizes the roller release solenoid [B]. This action rotates the roller release cam shaft [C],
which has an eccentric cam [D] on each end, to decrease the overlap of the feed [E] and
friction rollers [F]. This prevents smearing of the originals due to the friction roller. The overlap
is 0.9 mm when the solenoid is off, and 0.4 mm when it is on.
In the SADF mode, it is not necessary to separate the originals, so the DF CPU energizes the
roller release solenoid and releases the friction roller before feeding the original.
8-9
31 August 1989