Dell 5110cn Service Manual page 204

Sensor name (Diag. Code)
Tray 1 No Paper (DI-11)
1) Remove the Tray 1.
2) Turn on the power and enter the Diagnostic Mode.
3) Execute the DI-11.
4) Move the Actuator No Paper on the Paper Pickup Assembly to
check the sensor by finger.
Check the number on the control panel is counted up.
Actuator
5) Press the "CANCEL" key to stop the test.
6) Reseat the Tray 1.
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Chapter 2 Operation of Diag.
Confirmation procedures
Operator Panel
4)
Ida_Sec02_017FA