Friction Roller Release Mechanism - Ricoh FT4430 Service Manual

FRICTION ROLLER RELEASE MECHANISM

In the ADF mode, when the original activates the original entrance sensor
[S-35], the DF CPU energizes the roller release solenoid [S01-9]. This action
rotates the roller release cam shaft, which has an eccentric cam [A] on each
end, to decrease the overlap of the feed and friction rollers. This is to prevent
the original from being smeared by the friction roller [B]. 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.
7-9
16 April '88