Roland VP540 Won't print registration marks

Hi Lindsay,
I have a SP540V that just started doing the same thing. If you have found the problem can you please let me know.

 

If your nozzle test is good, then it has to be in the RIP software. Are you firing all nozzles in the nozzle test print?

 

I did a nozzle test after my post and sure enough no black which is bizarre because I had done a nozzle test that morning and it was perfect. I looked to see if there was any ink pooling from possibly a broken damper but nothing. I then tried swapping the wires between k and c. I unplugged the printer before doing this. Once I swapped the wires plugged the printer in, main power on, turned it on and a high temperature message came up so I just shut it off and put the wires back.
Now no k or c. I'm hopping it's just a fuse even though I did everything right according to what I've read in forums. But I believe 1 fuse covers 1 printhead so why would the k just all of a sudden stop working?
Any help with this would be greatly appreciated.

 

The key is to unplug the machine, hit the power buttons a couple times and wait 15 minutes. If you do this, you can't go wrong. I have actually tested the power output on a lot of these machines after they have been unplugged and most take a little less than 15 minutes to fully discharge due to the large capacitors that are used.

Probably. In 99% of cases it's the fuse but there is always a possibility of more damage being caused to the head or the board. Double check your cables for any ink splatter, debris, corrosion and/or damaged leads. If the cable looks good, replace the fuse and you should be good to go. If not, change the cables first.

Head heat errors mean that there is a short in the head causing it to heat up. In most cases this is due to the cable shorting itself out. In your case, the short popped the fuse.

 

Can you tell me if these are the fuses for the print heads?

 

Can you tell me if these are the fuses?

 

F1 is for Magenta and Yellow heads. F2 is for Cyan and Black.
So it wasn't the fuse to begin with, but it could be now, or you could have fried your cyan head. test the fuse with a Multi Meter. You can do this with the fuse still in the board. It's not unusual to bend one of those cables when you put them back in or not get it properly aligned. If the cables are damaged at all - folded over, torn contacts, etc. it is best to replace them. Inspect them closely wherever you removed and replaced them - either at the head or at the carriage board.