Brother GT-3 Series Service Manual page 293

6. Replacing Parts
24. Put the two screws through the holes on the front side of the Plastic Cover (left), and apply the silicone
tubes to the screws (8) that were removed in the step 13.
25. Put the claws on the Plastic Cover that were removed in the step 12 (left), and connect the Harness.
26. Push the Stop Lever to release the lock when you close the Front Cover with both hands.
27. Turn ON the printer.
28. Select [ Maintenance ] > [ Initial Cleaning ] from the menu and load the ink.
29. Execute the Normal Cleaning for all the Print Heads so that the surface of the Print Head may be dried.
30. Print Nozzle Check Pattern to confirm if the replaced Print Head works OK. (See "2-6-3. Test Print". )
31. Print the Standard Check Pattern to check the alignment if the Print Head is placed properly.
<Note>
If the Print Heads do not align properly, the printer cannot make correct r colors. See the example below:
Cyan Print Head does not align (shifted forward). Check step 15 and 16 in former page
Cyan moves up and Yellow and Magenta
seems to move down.
32. If the quality is OK go on to the next section "2-6-5. Firing Adjustment of the Print Heads" and "2-6-6.
Aligning the Print Position of White / Color Print Heads" to complete the adjustment after the Print Head
replacement. If you still see the problem in print quality, troubleshoot to improve the print quality.
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GT-3 Series