Brother GTX pro Instruction Manual page 297

Replacement procedures for print head on the white side (if you do not use a capping pouch)
<IMPORTANT>

When you replace a print head on the white side, you can minimize ink consumption by installing a capping pouch (optionally
available) in addition to a print head. Instead of the capping pouch, a white ink pouch at its ink depletion level before its expiry
date can also be used.
(1) From the menu, select [Maintenance] > [Head Replacement] > [White], and press
(2) Select [No] in response to the instructions on screen.
<TIPS>

Perform the work operation by following the on-screen instructions.

Pressing
(3) Follow the on-screen message and turn off the power.
<IMPORTANT>

Please complete the task within 15 minutes, in order to prevent the print heads from drying up.
(4) Open the front cover.
(5) Remove the upper case of a new print head.
(6) Remove four caps from the new print head.
causes the platen to start moving. Do not put anything around the platen.
Print head
Front cover
Upper case
297
Troubleshooting
.
X0331
Cap
X0068