Brother DCP-J4110DW Service Manual page 108

Random missing dots

Step
1 Maintenance unit stained
2 Non-discharge of ink from head
3 Carriage PCB defective
4 Maintenance unit defective
5 Head defective
6 Main PCB defective
White horizontal streaks

Step
1 Maintenance unit stained
2 Paper feeding correction not
updated
3 Head inclination is not correctly
adjusted.
4 PF encoder disk stained
5 Non-discharge of ink from head
6 PF encoder disk defective
7 Carriage PCB defective
8 Maintenance unit defective
9 Head defective
10 Main PCB defective
User Check
- Carry out head cleaning.
- Replace the ink cartridge.
Cause
Clean the maintenance unit (refer to
this Chapter.)
Perform the recommended purge procedures.
Refer to "Recommended purge procedures" in
Chapter 5, Section 1.3.29 "Purge Operation
(Maintenance mode 76)."
Replace the carriage PCB ASSY.
Replace the maintenance unit.
Replace the head/carriage unit.
Replace the main PCB ASSY.
User Check
- Check if it is not in draft mode.
- Carry out head cleaning.
Cause
Clean the maintenance unit (refer to
this Chapter.)
Update paper feed correction (refer to
Section
Adjust the head inclination (refer to
Section
Clean the PF encoder disk and flushing guide (refer
to
Perform the recommended purge procedures.
Refer to "Recommended purge procedures" in
Chapter 5, Section 1.3.29 "Purge Operation
(Maintenance mode 76)."
Replace the PF encoder disk.
Replace the carriage PCB ASSY.
Replace the maintenance unit.
Replace the head/carriage unit.
Replace the main PCB ASSY.
2-71
Solution
Solution
1.3.19.)
2.4.)
Chapter 3, Section 1.)
Section 4.3.2 in
Section 4.3.2 in
Chapter 5,
Chapter 4,
Confidential