Document Feeding Problems; Document Can Not Be Fed; Document Double Feeding - Brother MFC-J2320 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
1 area of the document pick-up
roller
2 Document pick-up roller stained Clean the document pick-up roller.
Document detection actuator
3
not mounted in place
ADF motor harness connection
4
failure
Document detection sensor
5
harness connection failure
Document nip piece not
6
mounted in place
Document pick-up roller worn
7
out
Document detection sensor
8
defective
ADF motor defective
Document feed gear,
9
document separation roller
gear broken
10 Sensor relay PCB defective
11 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.
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 separate roller ASSY.
Replace the document detection sensor PCB
ASSY.
Replace the ADF unit.
Replace the sensor relay PCB.
Replace the main PCB ASSY.
Cause
Replace the ADF separation pad.
2-81
Solution
Solution
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