Ricoh Gestetner 5450, Service Manual, Page: 44 / 315

MASTER EJECT 1 July, 1998
2-16
Drum Lock Mechanism
The clamper motor drives
the drum guide [C]. The
clamper closed position
sensor [A] and clamper
open position sensor [B]
monitor the position of the
drum guide.
When the drum reaches
the master eject position,
the drum guide moves until
the clamper open position
sensor [B] is actuated then
deactuated (the actuator
must go through the
sensor). This engages the
stud on the rear drum
flange.
Before the drum starts
rotating to the master
making position, the drum
guide returns to the home
position. The clamper
closed position sensor [A] determines this position.
NOTE: The same drum guide also moves when the drum is at the master making
position. (There is another stud on the rear drum flange, which is used to
secure the drum at the master making position.)
A link plate at the master eject position synchronizes the master clamper
with the drum guide movement.
To open the clamper, the drum guide (with the clamper opening arm) must
move a greater distance than at the master making position. Therefore, at
the master eject position, the drum guide moves (to open the master
clamper) until the clamper open position sensor [B] turns on (interrupted by
the feeler) and then turns off again, as shown in the diagram. Refer to the
Master Feed section to compare the two mechanisms.
C229D107.WMF
[B]
[A]
[C]
Rear
Front