Ricoh D131 Service Manual page 495

SC500: Feed, Transport, Duplex, and Fusing
Tray 4 lift malfunction
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SC504 B
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Note
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LCT tray malfunction
One of the following conditions is detected:
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SC510 B
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D131/D132/D133
The lift sensor is not activated within 10 s after the tray lift motor
starts lifting the bottom plate.
When the tray lowers, the tray lift sensor does not go off within 1.5
s.
Tray overload detected when the tray is set.
Tray lift motor defective or disconnected
Paper or other obstacle trapped between tray and motor
Pick-up solenoid disconnected or blocked by an obstacle
Too much paper loaded in tray
At first, the machine displays a message asking the operator to
reset the tray.
This SC will not display until the operator has pulled the tray out
and pushed it in 3 times.
If the operator turns the machine off/on before the 3rd opening
and closing of the tray, the 3-count is reset.
When the bottom plate is lifted, the upper limit sensor does not
come on for 18 s.
When the bottom plate is lowered, the lower limit sensor does not
come on for 18 s.
After lift begins, the upper limit sensor does not switch on before
the pick-up solenoid switches on.
The paper end sensor switches on during lift and the upper limit
sensor does not switch on for 2.5 s, and a message prompts user
to reset paper.
Tray lift motor defective or connector disconnected
Lift sensor defective or disconnected
Pick-up solenoid defective or disconnected
Paper end sensor defective
2-28 SM Appendix