Dell 3110cn Service Manual page 202

Yes
Try replacing the DRIVE
ASSY PH. (Removal 15/
Replacement 31)
Version 1 2006.02.25
D
Checking the DRIVE ASSY
PH.
Does the noise
arise from the printer?
Yes
Checked by [Digital
Output]-[DO-a] in [IOT
Diagnosis].
Checking the DRIVE ASSY
PH installation
Reseat the DRIVE ASSY
PH. (Removal 15/
Replacement 31)
Does the noise
arise from the printer?
Checked by [Digital
Output]-[DO-a] in [IOT
Diagnosis].
If the option tray
No
Checking the Option
END
Feeder Motor
arise from the printer?
Yes
Output]-[DO-19] in [IOT
Try replacing the Option
Feeder ASSY. (Removal
43/Replacement 4)
No
END
Chapter 1 Troubleshooting
attached
Does the noise
No
Checked by [Digital
Diagnosis].
END