Brother MFC-J6920DW, Service Manual

Page: 99 / 365

Confidential
2-65

Straight vertical stripes

White vertical streaks
User Check
- Check whether the recording paper being used is within
the specification.
- Clean the related rollers by printing blank paper.
- Clean the platen.
Step Cause Solution
1 Foreign materials in the
carriage rail Remove foreign materials.
2 Recording paper path
contaminated Clean the recording paper path.
3 CR encoder strip stained Clean the CR encoder strip.
4 Carriage flat cable not
mounted in place Set the carriage flat cable into place.
5 Ink supply tubes not mounted
in place Set the ink supply tubes guide into place.
6 CR encoder strip defective Replace the CR encoder strip.
User Check
- Carry out head cleaning.
Step Cause Solution
1 Foreign materials in the
carriage rail Remove foreign materials.
2 CR encoder strip stained Clean the CR encoder strip.
3 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)"
.
4 CR encoder strip defective Replace CR encoder strip.
5 Carriage motor defective Replace the carriage motor ASSY.
6
Head defective Replace the head/carriage unit.