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The button presses need to be done quickly.

Here's a link from a Google search (easy-peasy), but it's a pay for... https://www.service-manual.net/?download=roland-soljet-pro4-xf-640-service-manual Couldn't find a free one. Reputable site, I've used it quite a few times...

A google search for Roland rf 640 service manual pdf revealed - https://www.manualslib.com/manual/3032535/Roland-Versaexpress-Rf-640.html#product-VersaEXPRESS RF-640 Click the green download button at the top.

I would suggest running the fill test in service mode and watch as it prints. Look at how the ink is laying down and also look at the finished result. This will help you determine if it's a specific color or all of them...

If it's going to be some time before you get the motor, you should soak the print heads so they don't dry out and give you more problems...

If you never had issues with Roland OEM ink, then maybe you should switch back. The biggest mistake people make regarding 3rd party inks is looking at the cost per cartridge. The proper way to look at it is the cost of ink per square foot. If you are able to calculate this cost, you will realize...

My go-to test for checking a print head is the fill test in service mode. It is printing 720x720, bidirectional, std speed, 100% ink, which is pretty much the standard everyday setting for general sign printing (except for the 100% ink part). It prints each head channel individually, without the...

I would verify by phone if they are in stock in the US. Most of the motors are made in China, anyway. Turkey? Not too sure... Make sure it's returnable, if possible. No returns accepted can be a red flag...

If you are using Roland OEM ink, you should be fine. A generic motor will work fine. I would avoid anything shipping from China, and never, never buy anything from Indonesia or Malaysia! Digiprint has a generic motor in stock...

I know it seems odd, but the error is about positional data from the encoder sensor/encoder strip matching the data from the encoder disc in the scan motor. They go on a one-to-one match. If you look closely at the encoder strip with a magnifying glass, you will see it is equidistant black lines...

I still think it's the scan motor. damonCA21, your opinion?

Do setup sheet and send a file in service mode.

But you can come up in service mode, correct? When do you get the error in service mode?

It's about the linear encoder and the scan motor encoder being in sync. It seems the linear encoder board and encoder strip are OK, because the linear encoder step was good and consistent in its readings. Everything else checks out. Just to clarify, exactly when do you get the error? Is it when...

Leaning towards the scan motor.

FYI - you only need to run the aging for about 10 passes or so. It's auto-adjusting the voltage to the scan motor so it runs the same speed in both directions. The older Rolands required an adjustment of a potentiometer, now it's done electronically. Here's a link to the spring -...

The 0110 error code indicates a mismatch between the values read from the encoder strip and the encoder disc in the scan motor. There can be multiple causes for this – see attached. I would not rule out a damaged scan motor at this point, depending upon how violent the head crash was. I once...

The shim needs to be placed on the bed of the printer without any media. This sets the head height in the low position to Roland factory spec height. Then do all 4 of the head calibrations in service mode, using the thinnest material you normally use. Next, go into the user menu. Hopefully you...

Started a conversation...

I wish I had seen this sooner... When you swapped the cables, it should have been stated that you need to swap the cables completely, meaning not just at the printhead end. If you hopefully completely swapped the cables, then you probably have a bad cable that blew the fuse. If you crisscrossed...