Brother GTX-4 Service Manual page 102

Flow 2
(D) Non-ink ejecting
occurs in some
specific nozzles.
Head
Replacement
(8) How about the results after
performing powerful cleaning twice
additionally and then implementing
nozzle check pattern printing
repeatedly?
(E) Nozzles of non-ink
ejection are horizontally
in a row.
(There is a possibility
of wipe failure.)
(9) After cleaning the
surrounding areas of
wiper and nozzle
surface, is such failure
cleared?
YES
OK
(F) Nozzles of non-ink ejection vary.
(11) After cleaning the
surrounding areas of
wiper and nozzle
surface, is such failure
cleared?
YES
OK
NO
(10) After replacing
the wiper, is such
failure cleared?
YES
Replacement
OK
4-5
Improvement of print quality
NO
(12) After
replacing the
wiper cleaner, is
such failure
cleared?
YES
OK
NO
Head
NO
Head
Replacement