Brother MFC-J6920DW, Service Manual

Page: 103 / 365

Confidential
2-69

Separated lines over the whole page

Overlapping lines at the trailing edge of the recording paper
User Check
- Carry out head cleaning.
Step Cause Solution
1 Head inclination is not correctly
adjusted. Adjust the head inclination (refer to Chapter 4,
Section 2.4 "Adjust head inclination." )
2 Head calibration uncompleted Write the head calibration data (refer to Chapter
5, Section 1.3.2 "Creating of Head Calibration
Data and Writing it into Flash ROM."
)
3 Paper feeding correction value
not updated Adjust the paper feeding correction value (refer
to
Chapter 5, Section 1.3.19 "Updating of Paper
Feeding Correction Values." )
4 PF encoder disk stained Clean the PF encoder disk and flushing guide
(refer to
Chapter 3, Section 1 "PRECAUTIONS
BEFORE PROCEEDING" )
5 Non-discharge of ink from
head Perform the recommended purge procedures.
(refer to the recommended procedures in
Chapter 5, Section 1.3.29 "Purge Operation
(Maintenance mode 76)"
.
6 PF encoder disk defective Replace the PF encoder disk.
7 Head defective Replace the head/carriage unit.
8 Main PCB defective Replace the main PCB ASSY.
User Check
- Carry out head cleaning.
Step Cause Solution
1 Paper feeding correction value
not updated Adjust the paper feeding correction value (refer
to
Chapter 5, Section 1.3.19 "Updating of Paper
Feeding Correction Values." )
2 PF encoder disk stained Clean the PF encoder disk and flushing guide
(refer to
Chapter 3, Section 1 "PRECAUTIONS
BEFORE PROCEEDING" )
3 PF encoder disk defective Replace the PF encoder disk.
4 Main PCB defective Replace the main PCB ASSY.