Troubleshooting For Document Feeding Problems; No Document Is Fed; Multiple Documents Are Fed - Brother DCP-7080 Service Manual

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4.11 Troubleshooting for Document Feeding Problems

4.11.1 No document is fed

<User Check>
- Set the document properly and check that the display on the LCD changes.
- Check that the number of documents set is no more than 35 sheets.
- Check that the ADF cover is closed correctly.
Step
Document detection actuator
1
coming off
ADF cover actuator coming off
2
Connection failure of ADF motor
3
harness
Connection failure of ADF cover/
4
document detection sensor PCB
harness
Boss to push the ADF cover sensor
5
of the ADF cover
Document separate roller failure
6
ADF cover/document detection
7
sensor failure
ADF motor failure
8
Damaged ADF drive gear
9
Main PCB failure
10

4.11.2 Multiple documents are fed

<User Check>
- Check that paper used for the document is not thinner than 64 g/m
Step
Abrasion of ADF separation pad
1
Cause
Reattach the document detection actuator.
Reattach the ADF cover actuator.
Check the connection of the ADF motor
harness, and reconnect it if necessary.
Check the connection of the ADF cover/
document detection sensor PCB harness,
and reconnect it if necessary.
Replace the ADF cover ASSY.
Replace the document separate roller.
Replace the ADF cover/document detection
sensor PCB ASSY.
Replace the ADF motor.
Replace the ADF unit.
Replace the main PCB ASSY.
Cause
Replace the ADF separation pad holder
ASSY.
2-86
Remedy
2
.
Remedy
Confidential

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