Dell 3010CN Service Manual page 53

Sensor name (Diag. Code)
Sensor IBT Retract (DI-9)
(continued)
12) Check the sensor.
Paper
13) Press the "Cancel" key to stop the test.
14) Remove the cheater.
15) Reseat the drum cartridge.
16) Set the right side lever (Blue .
17) Close the Top Cover and the Front Door.
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Chapter 2 Operation of Diag.
Confirmation procedure
Operator Panel
Sensor IBT Retract
Leg_Sec02_022FA