Paper Size Detection - Ricoh A193 Service Manual

5.2.5 Paper Size Detection

[B]
There are four paper size sensors (microswitches) [A] on the front right plate
of the main frame. The sensors are actuated by a paper size actuator [B]
behind the paper size indicator plate which is located on the front right
corner of the tray.
Each paper size has its own actuator, with a unique combination of notches.
To determine the paper size in the tray, the cpu reads which micro switches
have been closed by the actuator.
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 to
accommodate one of a wider range of paper sizes by using a User Tool. If
the paper size for this position is changed without changing the User Tool
setting, a paper jam will result.
SM
Size
A3, F( 8
A4 Lengthwise
A4 Sideways
A5 Sideways,
[A]
11"x17"
B4, 8
1/2
B5 Sideways,
8 "x11"
1/2
B5 Lengthwise,
11"x8
1/2
* (Asterisk)
: ON (Not pushed)
A193D025.wmf
2-49
PAPER FEED
SW 1 2 3
"x13" )
1/2
"x14"
"
: OFF (Pushed)
4
(A193)