Brother DCP-L8400CDN Service Manual page 155

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Paper jam in the ADF
< User Check >
- Check whether the document is thinner or thicker than the specifications.
- Check whether the document is smaller or larger than the specifications.
- Check whether the document is wet or wrinkled.
Step
1 Foreign object inside ADF
2 Coming off of First side
document scanning position
actuator
3 Connection failure of the first
side document scanning
position sensor PCB harness
4 Coming off of document pinch
roller
5 First side document hold
installation failure
6 Scratch on ADF cover
7 Document feed roller worn out
8 First side document scanning
position sensor failure
9 ADF drive gear damaged
10 Scratch on document scanner
unit
11 Main PCB failure
Cause
Remove the foreign object.
Re-assemble the first side document
scanning position actuator.
Reconnect the first side document scanning
position sensor PCB harness.
Re-assemble the document pinch roller.
Re-assemble the first side document hold.
Replace the ADF cover.
Replace the document feed roller ASSY2.
Replace the first side document scanning
position sensor PCB ASSY.
Replace the ADF unit.
Replace the document scanner unit
Replace the main PCB ASSY.
2-125
Remedy
Confidential