Brother GTX-4 Instruction Manual page 249

Step 3: Check that no ink-jet droplets are ejected from the applicable nozzle
(1) Check locations of the non-ejecting nozzles on the result of the printed nozzle check pattern (1st to 3rd time), and
carry out the following procedures.
Comparison of non-ejection nozzle
positions
The same nozzle always does not
eject ink-jet droplets
A different nozzle does not eject
ink-jet droplets
(2) Check a result of the resultant nozzle check patterns, and carry out the following procedures.
Existence or nonexistence of a
nozzle that does not eject any
ink-jet droplets
Such a nozzle does not exist that
does not eject any ink-jet droplets
Such a nozzle exists that does not
eject any ink-jet droplets
Step 4: Clean the nozzle surface
(1) Clean the nozzle surface of the print heads.
<TIPS>

For details of cleaning method of the head nozzle, refer to "9-2-3. Cleaning of head nozzle >>P.257".
(2) Print out a nozzle check pattern.
Perform the super cleaning -> print out of nozzle check pattern for the third
time in a row.
Leave the printer as it is for about 30 minutes, and perform the normal
cleaning -> print out of nozzle check pattern for the third time in a row.
Exit
Proceed to Step 4.
249
Recovery action
Recovery action
Troubleshooting