CHANGE LABELS AND NOW LABELS ARE NOT PRINTING

Try removing the ribbon cassette and pre-tension it. There is help in the link.

https://www.google.com/search?q=Zm400+is+printing+white+lines

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The "ribon in" warning is because you set the printer to print DIRECT THERMAL insted THERMAL TRANSFER. The first mode is for printing directly on the thermal labels, not for using a ribon. The ribon sensor detects that a ribon is pressent and you get this message. You need to change the printing mode to Thermal Transfer from the printer Setup Menu, or from the Print Driver instaled on PC.

First of all.
B472 uses a near edge technology for printing.
You must use Ribbons for near edge head.
- You must use a WAx/resin for paper labels and Resin For Polyester or plastic labels.
You may also have your print head mis-alligned or you are not heating enough

I have used this type of printer before. Long ago when it was called the C-ITOH. However, never had to change the print head before. I would imagine that if you did - all the adjustments would need changing. Bad Gap would skip labels and bad pressure would make them too light or too dark. If there are any vertical lines (even faint) the print head is damaged. Also, these things are very specific as to media vs ink roller. You cannot use a paper ink roller with mylar labels. Vise versa works but those rolls are more expensive. I am sure you have tested this already but you point pretty exclusively to the "new" print head with your testing. Sounds like you have answered your own question. I would do some continuity tests on the head to see if it carries any current at all. Good Luck!

possible the ribbon is not the best in related to that especific labels, change ribbon.

The ribbon / label combination usually doesn't have anything to do with print position of the fields on the label. Is the quality/durability of the print that you are seeing on the new labels the same as before ? With a glossier stock print quality should actually be better. This will at least tell you that the ribbon is correct for the new label stock. Is the new label a different size than previous labels ? That could account for the fields not printing in the correct position if the printer is not calibrating correctly on the new size.

Not sure if this will help but may give some ideas...

If you are not using ribbon, the tickets are probably not Direct thermal. Try using a Ribbon and see if it works

i have the same problem , but my printer is ZEBRA S4M ZPL

my solution is:

in your barcode software: change printer settings: 1 and 2

1 . in media setting : change media type --> Thermal transfer
2. in documents options , configuration --> use printer settings

by Lin Yu Hsien

Had the same problem with a ZM400. As stated in the User manual (can be downloaded http://www.zebra.com/id/zebra/na/en/index/resource_library/manuals.results.html?FRRBarcodePrinters=6882), warning "Ribbon in" is usually caused by the wrong printing method (thermal direct instead of thermal transfer [which should be selected for ribbbons]). My error disappeared after choosing "thermal transfer" directly on the printer. For network printers this needs to be set by an admin in the network settings for the the printer to solve the problem permanently.

try adjusting the presure of the printhead

here is the site for the manual

http://www.zebra.com/id/zebra/na/en/index/resource_library/manuals.results.html


good luck