Ricoh G133 Service Manual page 726

Paper Feed
6.8.6 PAPER HEIGHT DETECTION – TRAYS 1 & 2
Two paper height sensors [A] [B] and actuator [C] are built into the paper tray lift motor. The
paper height sensors, detect the amount of paper in the tray.
The actuator [C] has two semicircles, and it is engaged with the lift arm shaft via gears. The
paper height sensors detect the paper amount depending on the position of the two
semicircles. The list shown below shows the detection combination of the two sensors.
The paper remaining status bar is displayed in the tray selection icon on the LCD.
Remaining paper
100%
(Status bar x 4)
70%
(Status bar x 3)
30%
(Status bar x 2)
10%
(Status bar x 1)
OFF: No actuator
G133
Paper height sensor 1 [A]
OFF
ON
ON
OFF
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Paper height sensor 2 [B]
OFF
OFF
ON
ON
SM