Brother GT-3 Series Service Manual page 290

12. Remove the silicone tubes that are attached the screws under the Carriage PCB (left), and remove the
holes of the cover (right), and remove the plastic cover.
13. Pull out the black tabs at the both edges of Flat Cable of the Print Head to the front side of the printer,
and remove the Flat Cable (the following example: Black).
14. Rotate the Lever (3) to your side that fixes the Print Head. Move it to your side.
(3)
GT-3 Series
6. Replacing Parts
281