Document Feeding Troubleshooting; No Feeding; Double Feeding; Wrinkles - Brother FAX-2840 Service Manual

3.8

Document Feeding Troubleshooting

3.8.1 No feeding

<User Check>
- Set the document so that it contacts the rear of the tray, and check that LCD display varies.
- Check that the number of the documents complies with the specifications in the
specification list.
- Close the control panel cover properly.
- Check that the document is within the specifications.
Step
Document detection actuator
1
catching on some position
Connection failure of the ADF
2
motor harness
Control panel cover sensor
malfunction
3
4 Document separation roller failure
5 ADF motor failure
6 Main PCB failure

3.8.2 Double feeding

<User Check>
- Check that the paper thinner than the specification is not used for the document.
- Flip through the paper and reset it.
- Check that the backside of used paper or damp (wet) paper is not used.
Step
1 Separation pad ASSY worn out

3.8.3 Wrinkles

<User Check>
- Check that the document is loaded into the ADF correctly.
- Check that the document guide matches the document size.
- Check that the document is not curled.
Step
1 Separation pad ASSY failure
2 Document feed roller failure
Cause
Correct the position of the document
detection actuator.
Reconnect the ADF motor harness.
Check the sensor performance following the
procedure in
problem occurs, replace the control panel
cover sensor.
Replace the document separation roller.
Replace the ADF motor.
Replace the main PCB ASSY.
Cause
Replace the separation pad ASSY.
Cause
Replace the separation pad ASSY.
Replace the document feed roller.
2-77
Remedy
"Function code 32". If any
Remedy
Remedy
Confidential