Brother MFC Series Service Manual page 68

■ Error Code 81
Wrong Paper
Recording paper size error. (Other than fax/list printing)
Paper width sensor detected a recording paper smaller than the specified size.
<User Check>
- Check if the recording paper used is according to specifications.
- Check if dark recording paper is not used.
- Clean the Platen.
Step
1 CR encoder strip stained
2 CR encoder strip defective
3 Paper width sensor defective
4 Carriage motor defective
5 Main PCB defective
Cause
Clean the CR encoder strip.
Replace the CR encoder strip.
Replace the Carriage PCB ASSY.
Replace the Carriage motor ASSY.
Replace the Main PCB ASSY.
2-36
LCD
Solution
Confidential