Document Feeding Problems; No Feeding; Double Feeding - Brother DCP-L8400CDN Service Manual

4.11 Document Feeding Problems

4.11.1 No feeding

< User Check >
- Load the document all the way, and check that the LCD display is changed.
- Check whether the number of loaded documents exceed the specified number.
- Check whether the ADF cover is properly closed.
Step
1
2
3
4
5
6
7
8
9

4.11.2 Double feeding

< User Check >
- Check whether the document is thicker than the specifications.
- Check whether the number of loaded documents exceed the specified number.
Step
1
Cause
Coming off of document
detection actuator
Coming off of ADF cover
actuator
Connection failure of the ADF
motor harness
Connection failure of the ADF
cover/document detection
sensor PCB harness
Document separate roller
failure
ADF cover/document
detection sensor failure
ADF motor failure
ADF drive gear damaged
Main PCB failure
Cause
ADF separation pad worn out
Re-assemble the document detection
actuator.
Re-assemble the ADF cover actuator.
Reconnect the ADF motor harness.
Reconnect the ADF cover/document
detection sensor PCB harness.
Replace the document separate roller ASSY.
Replace the ADF cover/document detection
sensor PCB ASSY.
Replace the ADF motor.
Replace the ADF unit.
Replace the main PCB ASSY.
Replace the ADF separation pad.
2-123
Remedy
Remedy
Confidential