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Have you looked at the exploded diagrams to see if you can find it on there? If not look where the wiring to the sensor comes from ( normally the servo board ) and then follow this to find out where the sensor is. I'm not familiar with the truvis, but it is most likely around the print dock area

Send the best two on the installers course and then make them supervisors for the rest of the team on jobs. It sounds like none of them really know what they are doing, and nobody is in charge to crack the whip. Keep their basic pay but give them performance related bonuses for getting a job...

The test print doesn't always show up problems as it only shoots the nozzles very briefly. Make up some artwork with 1 inch blocks each of C. M, Y and K and print those out, then look at the edges and see if they are nice and straight with no fuzziness or overspray which can point to a failing head

I have never really had a problem with matching blues, greens tend to be the one that are most annoying for me

And as far as future proofing, I tend to upgrade my system every 3 years or so. This seems to give a good balance between component cost and performance

Corel doesnt use that many resources, so you don't really need a super high end PC. The main thing is to get a very good graphics card as this makes a big difference to processing times. I have always built my own as its not exactly hard, and use mid range components ( so would have been the...

+1 for WD40, I always use this and it works great

I find when customers are mega fussy about a specific colour, normally because their 'designer' has designed it with a pantone colour then if you print out something close they can't tell the difference anyway. And it always seems to be oranges or greens, which are the worst colours for CYMK...

My guess would be the print carriage board failing. If you have fitted new head cables, the head seems to be getting bad signals from somewhere in the signal chain. If the yellow channel has failed this will stop that one head firing. The yellow overprint you were getting is normally a symptom...

One of the banes of my life is customers with colour matching. When they send you a photograph of something they have and say can you match this colour....

I always tell customers matching pantone colours isn't normally possible for printing as they are different systems and a CMYK printer cannot exactly replicate most pantones, so there will always be some colour variation. If it essential I will print out some test squares and send them to them...

Looks like maybe heat damage? Has it been particularly hot where it was fitted? Very strange though as never seen anything like that unless it has been cleaned recently and its a chemical reaction

IIRC it is similar to the Roland printers though where most of the main boards are behind the back cover on the control panel end of the printer

You can download it for free from here : https://pdfcoffee.com/cjv150maintenance-manual-d500994-ver100pdf-pdf-free.html Seems to cover all the CJV models

If it prints ok after the clean, I would keep doing that for as long as possible to put off having to get the new head. You never know it may fix itself over time.

I think it is probably new head time. The multiple soaks and cleanings could have damaged the nozzles, and you have ruled out pretty much everything else that could be a cause

If you buy from an official dealer for the vinyl manufacturer then you can be pretty sure you are getting the genuine article. No dealer is going to risk it selling counterfeit vinyl. I have never even seen or heard of counterfeit vinyl. There really isn't enough margin in it to make it worth a...

A lot depends on what sort of work you are going to do. I still think the Edge is better for specialist colours as the print costs are very high compared to eco solvent. I mainly do logo printing from vectors and rarely photo type stuff. On the Roland this is great as if you print in high...

I had a funny one once. Did some custom decals for a customers Harley. He was delighted with them and sent me some photos of the result which is quite common with bike owners when I do work for them. A couple of normal ones of the bike showing both sides, one of him sitting on it, and a couple...