Ricoh D131 Service Manual page 1353

Tray Movement Mechanism
If the lower tray is not installed (this is detected if the front and rear sensors remain
OFF), the machine will not operate in the booklet staple and fold mode. When
booklet mode is selected, the tray full message appears on the operation panel.
The combinations of the two actuators and two sensors as the actuator arm rises
determines the number of booklets that the lower tray can hold before the job stops.
The tray full detection depends on the size of the paper and the number of sheets in one
stapled and folded booklet.
In the table below, the conditions (
the previous page) refer to the states of the sensors described on the previous page.
Condition
Ready
Full 1
Full 2
Full 3 (or lower tray not
installed)
In the tables below:
"Sht" denotes "sheets in a stack".
"Cnt" denotes "Count" (see below for an explanation).
After a booklet is feed out, the fold roller motor stops the exit roller. The machine then
monitors the tray full sensors every 100 ms. The machine checks for a certain condition,
based on the size of the paper and the number of sheets in the booklet.
An example is shown below. Tell the operators that the number of sheets that the lower tray
can hold will vary greatly.
SM
Ready Full 1, Full 2
Front Sensor Rear Sensor
ON
ON
OFF
OFF
47
Full 3: See the illustration on
OFF
ON
ON
OFF
B804/B805/D373/D374/D612