Brother MFC-9130CW Service Manual page 115

■ Error code BF00
Scan Unable
Document is too longfor 2-sided scanning. Press Stop key
The first side document scanning position sensor detected that the document was 400 mm or
more in length and could not be fed from the ADF in duplex feeding.
<User Check>
- Use A4 or Letter size document.
Step
1 First side document scanning
position actuator catching on
some position
2 First side document scanning
position sensor failure
3 Main PCB failure
Cause
2-76
Remedy
Re-assemble the first side document
scanning position actuator.
Replace the first side document scanning
position sensor PCB.
Replace the main PCB ASSY.
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