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Improvement of print quality
(3) After replacing the carriage circuit board, is such failure cleared?
(1) In the case that the power is turned on, press the power switch to turn off the power.
(2) With reference to "6-2-19. Replacement of carriage circuit board", replace the carriage circuit board.
(3) Print out a nozzle check pattern to check the result.
ï‚· If non-ink ejection nozzle is not found -> OK
ï‚· If the state of non-ink ejection nozzle is not changed -> NG
=> "(4) After replacing the main circuit board, is such failure cleared?"
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