Brother GTX pro Instruction Manual page 296

(33) Close the lid, and put the white ink cartridge in position inside the printer.
<IMPORTANT>

W12 and W34 cartridges should correctly be placed at their original locations. Wrongly placed cartridges could cause a
printer malfunction.
(34) Repeat the same process to replace the other capping cartridge with the white ink pouch.
(35) On the operation panel, press
Then, the white ink will be installed after the head is replaced with a new one.
<TIPS>

After the procedures are completed, the current screen will go back to the standby mode screen.
(36) Adjust the carriage speed.☞ "7-4-1. CR (Carriage) speed adjustment >>P.216"
(37) Print the nozzle check patterns. ☞ "7-2-1. Print out of the nozzle check pattern (checking on the print heads)
>>P.199"
(38) Perform the initial settings after head replacement configuration.☞ "7-4-2. Initial settings after head replacement
>>P.217"
(39) Adjust the ejection timing of the print head. ☞"7-4-3. Firing adjustment >>P.218".
(40) Perform the platen feed adjustment.☞ "7-4-4. Platen-rolling adjustment >>P.219".
(41) Make the position adjustment between the white head and the color head.☞ "7-4-5. White/color alignment
>>P.220"
.
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Troubleshooting