Brother MFC-J6935DW - Page 112

Confidential
2-72
■ Random missing dots, fainted and patchy
■ White horizontal streaks
< User Check >
- Carry out head cleaning.
-
Replace the ink cartridge.
- Refill ink.
Step Cause Solution
1 Maintenance unit stained Clean the maintenance unit.
(refer to Fig. 2-11 (2-68))
2 Non-discharge of ink from
head
Perform the recommended purge procedures.
(refer to the recommended procedures in
Chapter 5, Section 1.3.28 "Purge Operation
(Maintenance mode 76)".
3 Carriage PCB defective Replace the carriage PCB ASSY.
4 Maintenance unit defective Replace the maintenance unit.
5 Head defective Replace the head/carriage unit.
6 Main PCB defective Replace the main PCB.
< User Check >
- Carry out head cleaning.
-
Replace the ink cartridge.
- Refill ink.
Step Cause Solution
1 Paper feeding correction not
updated
Update paper feed correction.
(refer to Chapter 5, Section 1.3.18 "Updating of
Paper Feeding Correction Values (Maintenance
mode 58)")
2 Head inclination is not correctly
adjusted.
Adjust the head inclination.
(refer to Chapter 4, Section 2.4 "Adjust head
inclination")
3 PF encoder disk stained Clean the PF encoder disk and flushing guide.
(refer to "Precautions for Troubleshooting and/or
Disassembly/Assembly")
4 Non-discharge of ink from
head
Perform the recommended purge procedures.
(refer to the recommended procedures in
Chapter 5, Section 1.3.28 "Purge Operation
(Maintenance mode 76)".
5 PF encoder disk defective Replace the PF encoder disk.
6 Carriage PCB defective Replace the carriage PCB ASSY.
7 Maintenance unit defective Replace the maintenance unit.
8 Head defective Replace the head/carriage unit.
9 Main PCB defective Replace the main PCB.