Ricoh Gestetner 5450, Service Manual, Page: 58 / 315

MASTER FEED 1 July, 1998
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2.4.3 MASTER MAKING AND FEED MECHANISM
Master Feed Mechanism
The master feed motor [F], a stepper motor, drives the master feed control [A],
tension [B], platen [C] and master set [D] rollers.
The tension roller feeds the master slightly faster than the platen roller, to prevent
the master from creasing. Therefore, the master between the platen roller and
thermal head is always under tension.
There is a torque limiter [E] built into the tension roller drive gear. This allows the
tension roller to become free from the master feed motor drive when the master is
under excessive tension, to prevent damage to the master.
NOTE: Strips of mylar under each master feed roller prevent the master from
being wrapped around the rollers. Be careful not to damage or set the
mylars in the incorrect position because they damage easily. For details,
refer to the Replacement and Adjustment section.
C229D003.WMF
[A]
[B]
[D]
[C]
[F]
[E]
Rear
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