Ricoh VT3500, Руководство по обслуживанию

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5.4 PRINTING PRESSURE RELEASE MECHANISM
The pressure release solenoid [G] energizes to release the pressure ON/OFF
lever [D] when the paper feed solenoid energizes during normal operation.
If a jammed sheet of paper in the printing section presses down on the paper
detecting feeler [A], the pressure ON/OFF lever [D] remains disengaged from
the paper detecting arm [C]. Printing pressure will keep on being applied to
the drum.
If printing pressure is still applied when an operator slides out the drum unit to
remove the jammed sheet, the drum surface and the press roller may be
damaged.
To prevent this, printing pressure is released from the drum if a paper
misfeed is detected. When a misfeed is detected, the printing pressure
solenoid [G] is de-energized. Then, the drum rotates to the home position.
During the drum return to the home position, the bearing [E] will ride on top of
the pressure cam [F]. This rotates the pressure ON/OFF lever [D] clockwise,
then the stopper [H] engages the lever [D] (the stopper [H] is pressed down
by spring tension). Thus, printing pressure is released since the lever [D] is
connected to the press roller [B].
[G]
[D]
[H]
[C]
[A]
[B]
[E]
[F]
[D]
1 December 1993
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