Brother MFC-J3520 Service Manual page 97


All single color
Step
1 Carriage PCB defective
2 Head defective
3 Main PCB defective

Random color
Step
1 Maintenance unit stained
2 Wrong head property value
3 Head calibration uncompleted
4 Non-discharge of ink from
head
5 Carriage PCB defective
6 Head defective
7 Main PCB defective
User Check
- Check that ink cartridge is loaded correctly.
Cause
Replace the carriage PCB ASSY.
Replace the head/carriage unit.
Replace the main PCB ASSY.
User Check
- Check that ink cartridge is loaded correctly.
- Carry out head cleaning.
Cause
Clean the maintenance unit (refer to
(2-62).)
Input the head property value (refer to
5, Section 1.3.25 "Updating of Head Property
Data and Backup/Restoration of Head
Calibration
Write the head calibration data (refer to
5, Section 1.3.2 "Creating of Head Calibration
Data and Writing it into Flash
Perform the recommended purge procedures.
(refer to the recommended procedures in
Chapter 5, Section 1.3.29 "Purge Operation
(Maintenance mode
Replace the carriage PCB ASSY.
Replace the head/carriage unit.
Replace the main PCB ASSY.
2-63
Solution
Solution
Data.")
ROM.")
76)".
Fig. 2-10
Chapter
Chapter
Confidential