Brother GTX600NB Instruction Manual page 213

(6) Check to see if the printed result of both sides are acceptable, and if no ink-jet droplets have been ejected, perform
a head cleaning for print heads. ☞"6-1-15. Head cleaning >>P.6-41"
<IMPORTANT>

If the print result shows an intermittent line, non-ejection has occurred. A head cleaning should be performed on the print
head that has a poor nozzle check result.

Even if the lines of the white-side printed result are light, since white ink is fired from more than one nozzle on the same
place, the quality is not affected.
<TIPS>

The following items are printed at the bottom of the nozzle check pattern:
• Serial number
• Firmware version
• Print date (day/month/year)
• Time

The name of the corresponding head (head A or B) is printed next to each nozzle check pattern.
Non-ejection occurred at the arrowed area.
Example: Non-ejection at color head B black
White head A
Precautions to keep good printing quality/use printer over the long term
• Temperature
• Humidity
• Number of prints
On the color side
White head B
Non-ejection occurred at the arrowed area.
Example: Non-ejection at white head A
6-45
On the white side
Color head B
Color head A
X1026