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Need Help Red turns to black or dark blue at random

LanceH

New Member
Hey Folks, This is totally random & I'm wondering if anyone has seen this before. This also happened today on another job where I was printing red only.... I'm running a Roland SP 540V.
 

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MikePro

Active Member
yikes! that is random!
was expecting to see some sort of ink dropout, but looks like the printhead decides to fire all colors at once at random.

possibly a dirty encoder strip or a piece of lint/cathair on the encoder sensor?

else it could be an issue with one of the ribbon cables starting to fail, getting pinched in such a way that it causes a tiny short in the data being transmitted to the printhead during movement.
someone else had a similar issue here in this thread
 
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Jim Hancock

Old School Technician
Does it do this in any other files? Are these labels step and repeated as multiple copies in Versaworks, or was it done in the design program? If in the design program, look into your created file for something hidden in that area, maybe some kind of mask.
 

damonCA21

Active Member
If the black appears randomly I would guess at a mainboard problem. It looks like it is sending the signal to fire the black head instead of the correct one ( or as well as the correct one ). There is no physical reason the printer would do this, and nothing to do with the encoder. The black head is actually printing properly as it is leaving the white text, but not when it is supposed to.
It could be a short or issue with the transistors, but I suspect the main chip is failing and the only option for this is to replace the board
 
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