Document Feeding Problems; Document Can Not Be Fed; Document Double Feeding - Brother DCP-J4110DW Service Manual

4.7

Document Feeding Problems

4.7.1 Document can not be fed

User Check
- Check that document is loaded all the way to the end correctly in the document tray.
- Check that the number of documents loaded in the document tray is within specified volume.
Step
Foreign materials in adjacent area
1
of the document pick-up roller
2 Document pick-up roller stained
Document detection actuator not
3
mounted in place
ADF motor harness connection
4
failure
Document detection sensor
5
harness connection failure
Document nip piece not mounted
6
in place
7 Document pick-up roller worn out Replace the document separate roller ASSY.
Document detection sensor
8
defective
9 ADF motor defective
Document feed gear, document
10
separation roller gear broken
11 Sensor relay PCB defective
12 Main PCB defective

4.7.2 Document double feeding

User Check
- Check whether a document thinner than the specified one is used.
Step
1 ADF separation pad worn out
Cause
Remove foreign materials.
Clean the document pick-up roller.
Set the document detection actuator into place.
Reconnect the ADF motor harness.
Reconnect the document detection sensor harness.
Set the document nip piece into place.
Replace the document detection sensor PCB ASSY.
Replace the ADF motor.
Replace the ADF unit.
Replace the sensor relay PCB.
Replace the main PCB ASSY.
Cause
Replace the ADF separation pad.
2-79
Solution
Solution
Confidential