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Yes well if I listened to all those who said things are impossible I would never get anything done. They in fact can be repaired using special tools and a microscope jig. I came into possession of the literature that details the repair process in my searches but its outside the ability of most...

Its possible to have the heads for this machine serviced/rebuilt at a specialty shop in mainland China. Thats what I did with mine since the machine is basically obsolete the layout for a new head is not exactly a great idea. Turn around time was like two weeks and under $200. PM me for...

Ok so I could not find this driver package on Mutoh site. I was able to find a full package randomly online I am providing a Dropbox link for anyone else who made need it in the future. Getting the USB to work was a dead end...

Anyone have a usb driver for the RJ900c? Or any driver package for it that will work with windows 7? sporgo@gmail.com

I avoid touching anything that nots broken but that's good to know. What other problems have developed?

Im curious how you checked them? because a visual inspection is not enough on such fuses you need to check them with a meter.

It was like pulling teeth to even get places to answer questions about mutoh machines. Seems unless you have a new machine under contract you are pretty much on your own with these units. Most of the service literature can be tracked down online however.

Yes you can get tubing splicers in pretty much any size. Most of the smaller diameters are for medical tubing. You just need to know the diameter in millimeters.

I was told that the solvent melts the lacquer adhesive that holds the head plate and base plate in place. So if you use an original water based head with solevent it fails within weeks or months. I have no particular use for solvent ink. It does not seem that installing a heater is that much...

I have been told that the DX5 head is the same. Some heads seem to be listed as "unlocked" but I don't know if that is relevant for my machine.

I have realized I am going to have to replace the head on my Rj900c whether I like it or not. Old head was clogged and leaking around the plate. There seems to be some mixed info about what kind of ink is safe to use in this machine. Some people told me Eco solvent but others say this will...

I'm glad to hear that. I have no desire to deal with any OEM ink cart situation ever again. Which is why I have an ecotank for most of my small prints.

Ok that is in line with what the guys on the electronics board thought. One side is looking for the reflection off the label and the other for no reflection thus the blacked out square. I would suspect they alternate the pattern for different carts but maybe not. Either way my particular unit...

That seems to be a reflective sticker with a window in the sticker to monitor ink level.

If that is the case then I can only assume the firmware was already bypassed at some point because I received no warning from the printer about non OEM cartridge. It just goes through the initial cleaning and paper check and then says "ready to plot".

Picture of the suspected ink level sensors. Varying the level of light that reaches these influences the printer reporting low ink levels.

So after doing a bunch of testing I found that the sensors in question only check ink levels. They do not inform the machine of the cartridge presence or ID. The RJ900c seems to rely on just some tiny white switches where the front of the cartridge loads and not any kind of cart ID system. I...

Do you need the parts lol. I paid practically nothing for it and I have a great deal of past experience repairing printers. Most of the large formats I looked at for sale near me are probably not fixable but the sellers are asking hundreds if not thousands anyway... If there was an Epson that...

Interesting. I did note that they looked more like optical pickups than smart card contact readers. Do you have instructions on how to make them?

I recently acquired a Mutoh RJ900c printer I am trying to resurrect from long storage. The print head seems salvageable so I thought I would get some bulk ink carts and try to run a cleaning or test cycle. I was apalled to discover the unit demands oem carts that have chips on them or it wont...