Question about Zebra Z4M Printer

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Our Zebra Z4M is printing vertical lines. I cleaned the printhead and platen roller as well [per troubleshooting instructions] but still the vertical lines persist. I also observed that the lines start to appear after printing 11 labels (if I'm printing 15 labels or more). If I print 10 or less, no matter how frequent, the vertical lines won't appear. What could possibly be the problem?

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  • 155 Answers

Archelle man: If this lines are darker, then the problem is in the ribbon. Try with another ribbon and decrease the print darkness.

Roberto Martinez
padrino99@prodigy.net.mx

Posted on Aug 28, 2011

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1 Answer

Hello, I have a problem with Zebra Z4M Plus


Hi, if is the vertical line, its the print head that need to be replaced,
try to clean the print head and try this to confirm:
turn printer off, press PAUSE button and at the same time, power on, don't release the button, please wait until printer LCD screen come on, then release button. It will print the PAUSE test and after few 3-4 prints, u can turn off and on again otherwise printer not ready to print your labels until u restart it. (pause test stops after 10-15 labels). this pause print just show how the print head is and if come with vertical lines, u will need to replace. other idea is (if u can) turn the bar code different position or on vertical way at label format. Thanks.

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Things to check:

1. Move the pressure arm further towards the outside of the printhead. Adjust if needed using only the minimum pressure required in order to achieve uniform print quality.

2. Inspect the printhead to ensure it has properly engaged the alignment pins. I have had after-market printheads that did not line up correctly and required "surgery" to make them properly seat on the mounting pins.

3. Check for worn platen roller bearings. If they're are sufficiently worn, one side of the platen roller will be slightly lower than the other.

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