Brother GTX-4, Service Manual

Page: 104 / 500

4-7
Improvement of print quality
Prior confirmation
Before starting the check flow, be sure to carry out following confirmation.
Items to be checked Description Remedy Document
Is the cap contaminated?
When the cap is contaminated, it cannot fully
contact the head, which would lead to
suction failure.
Clean the cap
Refer to "5-1-1. Cleaning
the nozzle guard, wiper,
exhaust cap, and suction
cap".
Is there any deposit of ink
around the nozzle
surface?
When the surrounding area of nozzle
surface is contaminated, it could lead to
ejection failure since the wiper cannot clean
the nozzle surface properly. Or, it could
reduce the adhesion between the nozzle
and cap, thereby causing ink suction failure.
Cleaning the
surrounding area
of nozzle surface Refer to "5-1-5. Cleaning
the surrounding area of
nozzle surface".
Is the wiper contaminated?
When the wiper tip is contaminated, it could
lead to ejection failure since the wiper
cannot clean the nozzle surface properly.
Clean the wiper
Refer to "5-1-1. Cleaning
the nozzle guard, wiper,
exhaust cap, and suction
cap".
Is there any indication of
scar or deformation on the
wiper?
When the wiper has any scar or
deformation, it could lead to ejection failure
since the wiper cannot clean the nozzle
surface.
Replacing the
Wiper
Refer to "6-1-20.
Exchanging Wiper Blade
Assembly".
Is the wiper cleaner
contaminated?
If the wiper cleaner is contaminated, residual
dirt on the wiper may prohibit the wipers
cleaning function.
Replacing the
wiper cleaner Refer to "6-1-19. Replacing
the wiper cleaner".
Is the wiper cleaner dried?
If the wiper cleaner is dry, it may prohibit the
wiper's proper function to wipe clean. Replacing the
wiper cleaner Refer to "6-1-19. Replacing
the wiper cleaner".
Is the flushing foam
floated?
If the flushing foam is not placed
appropriately, it may touch the nozzle
surface to stop ejection from the nozzle.
Replacing the
flushing foam Refer to "Replacing the
flushing foam".
Is the ink accumulated on
the flushing foam?
If an ink accumulates on the flushing foam,
the ink may touch the nozzle surface to
prevent ink from ejecting.
Replacing the
flushing foam Refer to "Replacing the
flushing foam".
Is the waste ink tube bent
in the middle?
The bent waste ink tube will stop the waste
liquid flow, thereby disabling ink suction
operation of the head cleaning function.
Verify the waste
ink tube Refer to "Confirmation and
disposal of waste ink".
Is the tip of the waste ink
tube touching the waste
tank bottom?
If the tip of the waste ink tube immersed in
liquid, it will prevent the smooth flow of liquid,
It can disable the ink suction operation of the
head cleaning function.
Verify the waste
ink tube Refer to "Confirmation and
disposal of waste ink".
Is the tube correctly
connected to the head?
If they are loosely mated, it may allow air to
enter into the head section during the head
cleaning operation, to cause non-ejection
condition of the nozzle. Verify connection
between the
head and the
tube
Refer to "6-1-31.
Replacement of print
head".
Is the ink pouch properly
attached to the cartridge?
If the ink pouch is not properly installed, the
cartridge cannot fully wind it, and fails to
supply enough ink to the head.
Install an ink
pouch Refer to "Replacement of
ink pouch".
Is the tube filled with ink?
If a large amount of air exists in the tube, that
air will go into the head to cause
non-ejection condition of the nozzle.
Re-install the ink Refer to "Re-install the ink".