Wrinkles On Documents; Document Size Not Correctly Detected - Brother MFC-J3520 Service Manual

4.7.4 Wrinkles on documents

User Check
- Check that the document guide is correctly set to the document size.
- Check that documents are not curled.
Step
1 Document separation roller
worn out
2 Each paper feed roller worn
out

4.7.5 Document size not correctly detected

User Check
- Check that documents are within specified size.
Step
1 Document scanning position
actuator caught on the
surrounding parts
2 Document width actuator
caught on the surrounding
parts
3 Document scanning position
sensor harness connection
failure
4 Document width sensor
harness connection failure
5 Document scanning position
sensor defective
6 Document width sensor
defective
7 Main PCB defective
Cause
Replace the document separation roller ASSY.
Replace the ADF unit.
Cause
Set the document scanning position actuator
into place.
Set the document width actuator into place.
Reconnect the document scanning position
sensor harness.
Reconnect the document width sensor harness.
Replace the document scanning position
sensor PCB ASSY.
Replace the document width sensor.
Replace the main PCB ASSY.
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Solution
Solution
Confidential