Brother GTX-4 Instruction Manual page 241

Probable Cause
Do the print heads rub against a T-shirt?
Has the flushing foam become dirty?
Has the platen sheet become dirty?
Has any ink attached to the carriage that secures
the print heads in place or is it dripping off?
The edges of the image are blurred, characters and straight lines are doubly printed and printed
result appears too granular
Probable Cause
Is the platen positioned at a level that is too low?
Is the firing timing correct?
Is the image enlarged on the printer setting screen?
Thin color cannot be printed out well gradually
Probable Cause
Is the ambient atmosphere at a high temperature
and very dry, which in turn tends to cause the
nozzle surface to dry up?
White ink is not printed out evenly
Probable Cause
Has the pretreatment been applied unevenly?
Has the pretreatment caused any change in
hardness or deformation of the pretreatment roller?
(This applies to the case where the pretreatment
roller is used.)
With reference to "6-5. Placing print medium in position >>P.152",
flatten the surface of T-shirt, and adjust the platen's height as
required.
With reference to "7-1-4. Replacing the flushing foam >>P.189",
replace the dirty flushing foam with a new one.
With reference to "7-2-5. Replacing the platen sheet >>P.205",
replace the dirty platen sheet with a new one.
With reference to "7-2-4. Cleaning the CR (carriage) plate
>>P.203", perform the cleaning of the carriage plate and remove
the accumulated ink.
With reference to "6-5. Placing print medium in position >>P.152",
adjust the height of the platen corresponding to the print medium
before using it. You can use the platen height adjustment lever to
adjust the height of platen. As a rough indication, adjust the height
so that it is lowered by one step from the limit height detected by
the obstacle sensor, and check that the platen is not detected by
the sensor.
With reference to "7-4-3. Firing adjustment >>P.216", make the
firing adjustment again. It is likely that the setup value is
incorrectly set after replacing a print head or the platen with a new
one, or after adjusting the platen height.
When a low resolution image is enlarged on the printer setting
screen, it may blur or angle the image. Pattern data should be
enlarged on an image editing application, and its roughness
should be checked.
With reference to "8-3. Flushing Interval Setting >>P.226",
perform the flushing more frequently. In addition, by reference to
"8-4. Flushing Volume Setting >>P.226", increase the flushing
volume.
With reference to "6-3-3. Application of pretreatment >>P.135",
apply the recommended amount of pretreatment evenly to the
target area.
After the pretreatment roller is used, put it in a plastic bag or the
like hermetically to prevent it from drying up, and keep it in a flat
place in an upright position.
Also, when it remains unused for two weeks or longer, wash it
well with running water, and let it dry in a shaded area.
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Troubleshooting
Remedy
Remedy
Remedy
Remedy