MAXIFY MB2720 BLANK GAPS IN PRINTING

[SAGEBABE]

I'M GETTING GAPS OF BLANK LINES WHEN I PRINT.  I HAVE CLEANED NOZZLES, ALIGNED PRINTHEAD, REPLACED INKS, DONE EVERYTHING I CAN THINK OF AND MY TEST SHEET LOOKS LIKE THIS.  THERE IS A GAP IN THE BLACK PATTERN.

CAN ANYONE HELP TO DIAGNOSE WHAT IS CAUSING THIS BLANK GAP IN PRINTING?

THANK YOU

[Michael]

Hello.

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