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Yes, as has been suggested, replace the magenta damper. Also clean around the post on the print head where the damper goes with a swab damp with cleaning fluid to remove any dried ink buildup. In addition, replace the O-ring on the ink line going into the damper. Examine the tubing where the...

It appears in the process of changing the dampers, you may have knocked the ribbon to the magenta/yellow head out of kilter. What you are seeing I typically see when a ribbon cable isn't properly seated and the print head goes into a free fire mode. I suggest you immediately power down and...

Before you replace any parts, you should do a complete head alignment in service mode. Your print heads are seriuosly out of alignment. This will include bias - which insures the heads are straight and parallel to each other, then the vertical - which lines all the heads up with each other...

I agree with rjssigns on the parts replacements and to assess printhead condition. Service menu is Down Right Left Up Right Down Left. Then hold Left Down Right while clicking Power button. Keep in mind this. The nozzle test is like starting your car and it idles fine. Printing is like running...

I would agree with GAC05 on this. It appears to be to be ripples or tunneling of the media. In bi-directional printing, the alignment is dependent on the head to media distance remaining consistent. This head to media distance changes in the area of the tunneling. When this occurs, the...

I have been doing tech work on Rolands since 2004 and am not surprised by what I see here. The older Roland printers using DX4 heads have a tendency for the black head/channel to go before the other colors. What is shown here is typical. The black ink uses carbon black as a pigment, which is...

It sounds like a rapidly repeating sound, leading me to suspect some buildup in the drive gears on the scan motor system. Check both gears at the scan motor. An old toothbrush is good for cleaning the gears. Also put a drop or 2 of light weight machine oil, like 3in1, in the bearing for the...

I agree with Solventinkjet's observation. Your tech definitely needs some more experience - "tech said time ago there's a huge risk of permanently damaging the printhead when dampers are changed", as this is absolutely untrue, unless the tech is clumsy and breaks the nipple on the head...

Please do not use 70% alcohol, as it has too much water content. The encoder is made of graphics film, which is processed in water based chemistry. The amount of water in 70% alcohol is enough to soften the emulsion on the encoder and can result in damage to it. I had a customer repeatedly clean...

What did you clean the encoder with? If you used anything less than 93% alcohol, the encoder strip is probably damaged. The encoder strip is made of graphics film, processed in water based chemistry. Lower grades of alcohol contain more water than higher grades and will soften the emulsion of...

You might consider replacing the damper for the black. Over time, the solvent ink can impact the O ring that seals the damper to the print head manifold and you lose the sealed integrity of the ink line system. This can cause slow leakage from the print head causing random ink drops, mostly...

This looks like static to me. Questions... What is your head height? Does it do this on other media?

The solid stripes of color and the nozzle test print indicate you have printed the fill test in service mode. Based on the look of the cyan and light cyan bars, those 2 print heads look like they are dying. To fully understand the difference between a good nozzle test and bad printing, use this...

I would not recommend swapping cables on the single head, as there is internal circuitry in the print head that is different from one side of the head to the other, such as head temperature circuitry. However, along that same concept, swapping the ribbons from the magenta/yellow head with the...

Erikka is on target. What you are most likely seeing is the result of the banner material being slightly squished and flattened by the rollers. This is causing a microscopic thickness change in the media and changing the printhead to material distance. This results in a tiny variation in the...

Your problem is most likely light reflections off of the fabric itself. I recently tried to profile a dye-sub printer with an i1 and got a very spiky curve on the yellow in the linearization. This thread will give you some clues -...

Cleaning the encoder strip should NOT be done with a water damp cloth. The strip is a precision piece of film and water can actually cause problems. The best solution for cleaning it is a microfiber cloth and pure acetone. Acetone does not effect the emulsion on the encoder strip (water will!)...

Shut your printer off completely and pull the cyan ink cartridges. The odds are one of the cartridges is empty and the flag didn't come out and trip the ink empty micro-switch. The reason for turning the printer off is the internal ink level display won't be reset. You may have to do a power...

The tool carriage ribbon is most likely going bad. Inexpensive and easy to replace.

The capping adjustments under #adjust need to be done to insure proper operation, however these adjustments, including the height adjustment, do not change the left-right position of the head-cap relationship. My experience has shown the caps tend to end up too far to the left over time, due to...