Brother MFC-J3520 Service Manual page 104


Separated lines at the trailing edge of the recording paper
Step
1 Paper feeding correction value
not updated
2 PF encoder disk stained
3 Non-discharge of ink from
head
4 PF encoder disk defective
5 Main PCB defective

Characters having shadows (ghost)
Step
1 Paper feeding correction value
not updated
2 Vertical print lines not aligned
3 PF encoder disk stained
4 CR encoder strip stained
5 PF encoder disk defective
6 CR encoder strip defective
7 Head defective
8 Main PCB defective
User Check
- Carry out head cleaning.
Cause
Adjust the paper feeding correction value (refer
to
Feeding Correction
Clean the PF encoder disk and flushing guide
(refer to
BEFORE
Perform the recommended purge procedures.
(refer to the recommended procedures in
Chapter 5, Section 1.3.29 "Purge Operation
(Maintenance mode
Replace the PF encoder disk.
Replace the main PCB ASSY.
Cause
Adjust the paper feeding correction value (refer
to
Feeding Correction
Adjust vertical print line alignment (refer to
Chapter 5, Section 1.3.23 "Adjustment of
Vertical Print Lines/Software Correction for
Inclination/Corrugation/Ruled
Clean the PF encoder disk and flushing guide
(refer to
BEFORE
Clean the CR encoder strip.
Replace the PF encoder disk.
Replace the CR encoder strip.
Replace the head/carriage unit.
Replace the main PCB ASSY.
2-70
Solution
Chapter 5, Section 1.3.19 "Updating of Paper
Values.")
Chapter 3, Section 1 "PRECAUTIONS
PROCEEDING")
76)".
User Check
- Carry out head cleaning.
Solution
Chapter 5, Section 1.3.19 "Updating of Paper
Values.")
Chapter 3, Section 1 "PRECAUTIONS
PROCEEDING")
Lines.")
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