Brother GTX-4 - Page 101

4-4
Improvement of print quality
Flow 1
※ Scheduled for incorporation in future versions.
At this time, proceed with the flowchart on the
premise that the suction normally operates (yes).
(1) After replacing the head
circuit boards of white head
and color head, is such failure
cleared?
NO
Heads of non-ink ejection are not replaced.
(Head failure or maintenance suction failure)
YES
Heads of non-ink ejection are replaced.
(Electric failure of main unit side)
(2) After checking the wiring of
carriage circuit board through
main circuit board, is such
failure cleared?
OK
NO
(3) After replacing the
carriage circuit board, is such
f
a
il
u
r
e
c
l
ea
r
ed
?
OK
(4) Replace the main circuit board
(5) After cleaning the
maintenance parts, is such
failure cleared?
OK
Replacement of
maintenance uni
t
(6) Is maintenance
operation (suction, exhaust)
conducted correctly?*
(7) After replacing the suction
cap, is such failure cleared?
NO
NO
Head
Re
p
lacemen
t
OK
NO
Y
ES
Y
ES
Y
ES
NO