Ricoh A250 Service Manual page 108

PAPER FEED
Paper Size Detection
The paper size switch [A] includes three sensors (microswitches). Actuators on a
dial [B] behind the paper size indicator plate actuate the sensors.
Each paper size has its own actuator, with a unique combination of notches. To
determine the paper size, the CPU reads which switches the actuator has turned
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 printer control
board recognizes that the paper tray is not installed.
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 a user tool at the
machine's operation panel.
North America
8 " x 14"
1/2
A4
8 " x 11"
1/2
"
8 " x 13"
1/2
8 " x 11"
1/2
11" x 17"
A250
Models
Europe
A5
A4
A4
"
8 " x 13"
1/2
8 " x 11"
1/2
A3
[A]
A250D108.WMF
Switch Location
Left
OFF
ON
ON
OFF
ON
ON
ON
ON: Pushed OFF: Not Pushed
2-50
[B]
Center Right
OFF ON
OFF OFF
ON OFF
ON ON
ON OFF
OFF ON
ON ON
SM