Brother MFC-J6510DW Service Manual page 105

Stained leading edge of recording paper
Step
1 Maintenance unit contaminated
2 Paper feeding correction value not
updated
3 Head/carriage unit not mounted
correctly
4 Print head defective
Overlapping lines over the whole page
Step
1 Inclination of the head not
adjusted
2 Head calibration data not written
3 Paper feeding correction value not
updated
4 PF encoder disk stained or
scratched
5 Print head defective
6 Main PCB defective
User Check
- Perform head cleaning.
- Check whether recording paper being used is within the specification.
Cause
User Check
- Perform head cleaning.
Cause
2-75
Solution
Clean the maintenance unit. Refer to
Update the paper feeding correction value. Refer to
Chapter 5, Section 5.1.4.16.
Reposition the head/carriage unit.
Replace the head/carriage unit.
Solution
Adjust inclination of the head. Refer to
Section 4.1.
Perform head calibration. See Function code 02.
(Refer to Chapter 5, Section
Update the paper feeding correction value. Refer to
Chapter 5, Section 5.1.4.16.
Replace the PF encoder disk and clean the flushing
guide. (Refer to Chapter 3, Section
Replace the head/carriage unit.
Replace the main PCB ASSY.
Section 2.4.2.4.
Chapter 4,
5.1.4.2.)
3.1.)
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