Paper Size Detection - Ricoh B121 Service Manual

6.11.6 PAPER SIZE DETECTION

Paper Tray
SW
1
Size
A3, 11" x 17"
A4 LEF
A4 SEF,
8 " x 11"
1/2
A5 LEF,
8 " x 14"
1/2
8 " x 13"
1/2
11" x 8 "
1/2
* (Asterisk)
: ON (Not pushed)
: OFF (Pushed)
There are three paper size microswitches [A] on the front right plate of the paper
tray unit. The switches are actuated by a paper size actuator [B] behind the paper
size indicator plate, which is on the front right of the tray.
Each paper size has its own actuator, with a unique combination of notches. To
determine which size has been installed, the CPU reads which microswitches the
actuator has switched off.
The CPU disables paper feed from a tray if the paper size cannot be detected. If
the paper size actuator is broken, or if there is no tray installed, the Add Paper
indicator will light.
When the paper size actuator is at the "*" mark, the paper tray can be set up to
accommodate one of a wider range of paper sizes by using User Tools. If the
paper size for this position is changed without changing the User Tool setting, a
paper jam will result.
SM
2 3
6-53
PAPER FEED
[B]
B121D958.WMF
B121 Series/B259 Series
[A]