Master Clamper Open Mechanism; Drum Position Lock Mechanism - Ricoh C231 Service Manual

MASTER EJECT

2.3.2 MASTER CLAMPER OPEN MECHANISM

[B]
[A]
[H]
[D]
[I]
[G]
[C]
[E]
[J]
C231D557.WMF
[F]
The master eject position sensor [A] ensures that the drum is positioned at the
master eject position when the Start key is pressed.
The master clamper has a magnetic plate [C] to secure the master's leading edge
in the clamper. The clamper is fixed to the clamper shaft [D], which has a lever [E]
at the rear side.
The clamper motor [F] drives the moving link [G] and pushes the clamper lever
open [E]. (The link position, the clamper open and close positions, are detected by
the clamper open sensor [H] and clamper close sensor [I].)
The master clamper then lifts the master eject arm [J] to release the master's
leading edge from the clamper.

Drum Position Lock Mechanism

When the clamper motor [F] opens the clamper at the master eject position, the
drum guide [B] moves and engages the pin on the rear flange of the drum.
The drum guide is moved by the same mechanism that drives the moving link [G].
This means that the drum guide captures the drum at the master eject position
when the master clamper is being opened.
When the clamper motor turns on again to close the master clamper, the drum
guide also disengages the pin and the drum can now turn.
SM C231/C237/C238
2-21