Brother MFC-J6920DW, Service Manual

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Confidential
2-62
4.3.2 Print-image problems
Problems related to defective image are end user recoverable if following the User
Check items.
If the same problem occurs, follow each procedure in the order of the number
described in the Step column in the tables below.

Completely blank
<Cleaning of the maintenance unit>
Fig. 2-10
User Check
- Check if there is enough remaining ink.
- Carry out head cleaning.
Step Cause Solution
1 Maintenance unit stained Clean the maintenance unit (refer to the figure
below.)
2 Wrong head property value Input the head property value (refer to Chapter
5, Section 1.3.25 "Updating of Head Property
Data and Backup/Restoration of Head
Calibration Data."
)
3 Head flat cable connection
failure Reconnect the head flat cable.
4 Carriage flat cable connection
failure Reconnect the carriage flat cable.
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 Ink supply tubes bent Replace the ink refill ASSY.
7 Carriage PCB defective Replace the carriage PCB ASSY.
8 Maintenance unit defective Replace the maintenance unit.
9 Head defective Replace the head/carriage unit.
10 Main PCB defective Replace the main PCB ASSY.
Maintenance unit
Cleaner stick