Document Feeding Problems; Document Cannot Be Fed; Document Double Feeding - Brother MFC Series Service Manual

4.7

Document Feeding Problems

4.7.1

Document cannot be fed

<User Check>
- Check if the document is loaded correctly all the way inside the ADF document support
and if "ADF READY" is displayed on the LCD.
- Check if the amount of document inside the ADF document support is not fewer than the
specified amount.
Step
1 Foreign materials near the
document pick-up roller
2 Document pick-up roller
stained
3 Document detection actuator
out of place
4 ADF motor harness connection
failure
5 Document detection sensor
harness connection failure
6 Document pick-up roller worn
out
7 Document detection sensor
defective
8 ADF motor defective
9 Main PCB defective
4.7.2

Document double feeding

<User Check>
- Check if the document used is thinner than the specified thickness.
Step
1 ADF separation pad holder
ASSY 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.
Replace the Document separate roller ASSY.
Replace the Document detection sensor PCB.
Replace the ADF unit.
Replace the Main PCB ASSY.
Cause
Replace the ADF separation pad holder ASSY.
2-66
Solution
Solution
Confidential