Brother GTX600NB Instruction Manual page 210

(4) By pressing
<TIPS>

Under the condition that the nozzle which has been confirmed not ejecting ink-jet droplets, determine the color for which the
head cleaning should be performed. ☞"6-1-17. Print out the nozzle check pattern (checking on the print heads) >>P.6-44"
(5) Then, the head cleaning will be performed for the specified print heads.
<TIPS>

The cleaning operation cannot be canceled halfway.

After the procedures are completed, the current screen will go back to the standby mode screen.
Precautions to keep good printing quality/use printer over the long term
, select [All Colors], [All Whites], or [All Print Heads], and press
Normal Cleaning
All Colors
All Whites
All Print Heads
6-42
.