Brother GTX-4 Service Manual page 144

(12) Mount the flushing receiver back to its original place in the maintenance unit.
<TIPS>

Direct its orientation with a hole on the bottom to the front.
(13) Close the front cover.
(14) Turn on the power.
<NOTE>

Dispose of any waste resulting from the replacement in accordance with applicable laws and ordinances.
<TIPS>

Then, the head cleaning will be performed to prevent any ink from drying up.
(15) Print out a nozzle check pattern to check the result.
 If non-ink ejection nozzle is not found -> OK
 If the state of non-ink ejection nozzle is not changed -> NG
=> With reference to "5-1-4. Cleaning of head nozzle", clean the nozzles.
=> Print out the nozzle check pattern once again, and if the print quality is not regained, clean the head
with reference to "7-2-2. Head cleaning".
=> Print out the nozzle check pattern once again, and if the print quality is not regained, clean the head
with reference to "6-1-31. Replacement of print head".
4-47
Improvement of print quality