Brother GT-3 Series Service Manual page 108

3. Check the print result.
If misfiring occurs immediately after starting printing and the result is similar to a barcode as shown below,
execute the countermeasures A to D below.
[A] If the Ink Cartridge is nearly empty (the indicator on the Display is blinking):
1. Replace the Ink Cartridge with a new one. (Refer to "2-6-1. Installing Ink Cartridge".)
2. Execute "Powerful" cleaning. (Refer to "2-6-3. Test Print".)
3. Print the A3-sized solid print pattern (Solid K. Solid M, Solid C, Solid Y or Solid W*) again.
4. The problem is resolved if stripes no longer appear.
[B] Filter Life expired:
1. Replace the Filter of the issued Print Head. (Refer to "6-1-33. Replacing the Filter on the Print Head".)
2. If the issue recurs after replacing the Filter to new, there may be high possibility of ink gel caused by
Tube cracks. Replace the Tube by referring to "6-1-35. Tubes".
[C] Print Head issue:
Replace the Print Head that has an issue.
(Refer to "6-1-33. Replacing the Filter on the Print Head" and "6-1-35. Tubes".)
[D] Tube is bent or twisted, or cracked inside:
1. Replace the Tube. (Refer to "6-1-35. Tubes.")
2. Print Nozzle Check Pattern (Refer to "2-6-3. Test Print") and confirm the print quality of the Print Head.
3.
Print the A3-sized solid print pattern (Solid K. Solid M, Solid C, Solid Y or Solid W*) again.
4.
The troubleshooting is done successfully when no banding occurs.
4. Solving Print Quality Problems
GT-3 Series
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