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That one is the cut carriage board. The print carriage board will be the one the cables go into from the print head. It may be called something different on the BN20 ( I'm not as familiar with them as the larger Rolands ) but it basically sends the signals from the printer to the heads. If this...

One thing that could be worth replacing is the print carriage board. These can cause problems. I have seen them before print fine sometimes, and other times would cause the same issue you have where they just fire one or all of the channels constantly and flood the vinyl with ink. If they are...

That is always the danger, but if fitted properly by someone with experience then you shouldn't have any problems ( not having a go at you, but as you can see it's not always as simple or cheap as it can seem getting these things working ! ). TBH I have fitted a lot of heads as a tech over the...

The other problem with getting a used head is you don't know how many hours it has on it. They have a limited lifespan, so you could be buying one that has had very little use, or it could be one that is going to break within a month :( And the seller may have sent a video, but you don't know...

Well done for finding it, but yes, you won't be able to get a replacement chip for that as it would be custom made for Roland and they have never sold them seperately. The best option now would be to look for a working used board instead

Ah nightmare ! As you have found out, the heads aren't supposed to be dismantled. Even if you could, there is nothing you can get to inside them to fix. The problem with solvent heads is once they have had ink in them it is very risky getting a used one. If it has been properly flushed ( which...

If you are really stuck as I know you have been looking for a while, I can get it done in the UK for you if you sent the part here

If it is the plastic part that has snapped then plastic welding should fix it. If you arent confident doing it yourself then you should be able to find somewhere locally. A lot of motorbike repair places do plastic welding. You can also reinforce it with small metal bars plastic welded into the...

It could be if there was ink in the cable slots it was ok at first, then worked its way down further and shorted the head, or there was some ink had spilled somewhere else you hadn't noticed that caused it.

Having a quick look at the schematic VCC3 feeds a lot on the board as it is the main supply voltage for the ICs

The next step I would take is to follow the schematic and find out where VCC3 goes to, and what else is connected to it. As all the components you have checked so far are on the same node ( the output of the regulator ) where you are seeing the short, then the short must be being caused by...

The service manual should have the schematic in it so you can check from there where the output goes to. p.s. don't send it to china to get it repaired !

It will either be the head, or it could be the head carriage board but this is less likely. Normally if this goes then whatever you try and print will just print solid black over everything, even on the nozzle test. I would also order more new head cables as well as the head as these need to be...

From the sound of it you have fried the head. The nozzle test doesn't print with all the nozzles and uses a tiny amount of ink. When you run the actual print test it uses all the nozzles and more ink. If you had ink get into the print head cable plugs this will short the head if you tried to use...

Agreed Netsol. The other quick and dirty method ( if you are experienced in soldering ) is to replace all the components directly connected to the regulator and the regulator itself. This can sometimes work if you don't have test equipment just by trial and error. I would be definitely looking...

I'm not sure without looking at the whole circuit, but when you measure between OUT and GND on the regulator you should see a small voltage there, probably around 5V

I'm not sure what you mean, but have you removed and tested C29 and C71? If either has failed it could be causing the ground at the output. Other than that the regulator could have failed internally, in which case just replace it. VCC3 is not powering anything on the regulator, that is the...

You could adapt it easily enough to match the original though

Absolutely! and the first few times you do it you never have any spare ones with you. You soon learn :D

If you can't get any joy I can recreate the font part of the logo from scratch as a vector for you. I do this as part of my business. Would be done from scratch, not using a converter so would come out as per the original font