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Have you fixed your problem? It helps the whole community when we offer suggestions on fixing a problem and get feedback on if that worked.

Make sure your cap is clean and there is no ink buildup on the bottom of the head and also around the edges of the head. If that doesn't fix the issue, then replace the cap, preferably with an OEM cap.

Excellent how to video! But don't forget to remove the clip on the drain line when turning the printer back on.

Is your heat on? I don't know if it's the picture quality or not, but that looks suspiciously like a lack of heat during printing. A pic of the nozzle check would also be very useful.

Examine the bottom of the print head for any physical damage. Clean or replace the cap. Please turn off CAPS LOCK.

Based on your nozzle test and shot counts, it looks like you are due for 2 print heads to be replaced...

Press the panel buttons in the following sequence: Main power on, front panel power off. Press the panel buttons in the following sequence: Down, right, left, up, right, down, left, press and hold right, left, and down buttons all at once and turn on front power while holding those buttons down...

6000002178 is the correct part number for the current head board for carriage board 6702048041 for the XF-640. Do a google search and several vendors come up. What was the original issue that caused you to replace the printhead and carriage board? It is very helpful to know what led up to...

As Joe said, calibrations should certainly be part of the process to fix the issue. And as ewded suggested, check the head height. Fine text will print better on a low head height. My concern is when I zoom in, I also see some overspray around the letters. This could be head height, media...

Correct, 6000002178 does not show in the original service manual parts list for the XF-640. I have legitimate access to Roland R-Net and found the part number this way. In the exploded view for the XF-640, it shows 2 numbers for the headboard - 6702048020 (which is lined out) and 6702048021 as...

It would be helpful to see a nozzle test print and the edges of a fill test in service mode. Please post these to help in determining what is wrong. How old is the printer? Your issue could be any of the following: Needing a thorough ink system cleaning, i.e., caps, wipers, all around head area...

I would suggest this is likely a linearization issue. The linearization is can be off in part of the density curve, resulting in some densities being gray and other densities having a color shift. Have your profiles re-linearized (re-calibrated) and see if that fixes your issue.

6000002178 is the correct part number for the current head board for the XF-640. What was the problem that made you determine the carriage board had a problem? Also, what is the reason the new carriage board does not seem to be compatible with the original head board?

I don't know that this will fix your problem, but sometimes a specific file can hang up Onyx. Close Onyx, then go to your Onyx/Work/Mimaki UCJV300-160 folder and delete all the files and restart Onyx. See if that helps...

As MikePro has said, plenty of experienced people here willing to help, but we need the info MikePro has asked for.

I would suggest print with heat, cut without heat for this reason... The heat MAY cause minor dimensional changes where the media is on the platen. The amount of time any given section of the media is on the platen during the crop mark registration sequence will probably be different then when...

You need to do your head alignments first, then the bi-directional for both thick & thin in user mode. The attached files should be done in the order of the file names.

The reason switching the position of the dampers won't help much in this case is they share a common ink line just a few inches away, so any air leakage is common to both dampers. Did you replace one damper or both? And where did you get them? You can get OEM, good quality aftermarket and crap...

Did you switch the magenta dampers positions or did you replace them? As the 1204 splits each color ink line at the head, switching them may not tell you anything. If you have replaced them, be sure all the ink line connections are tight. Did you replace the ink line O rings on top of the...

There are blades designed for cutting abrasive materials, such as reflective material. If you have been using a regular vinyl blade, then I would suggest you try the other type. For the Graphtec, you will need to use the red tip blade holder. Possible solution -...