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Repair and disassembly guides for Epson printer. The company was founded in 1942 as Daiwa Kogyo, Ltd., but merged with another company in 1959 to create Suwa Seikosha Co., Ltd.

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Nothing it prints nothing

I have a wf 7720 i used it for dye pigment then I switched to sublimation ink. i ran both nozzle clean and alignment processes it worked for several prints only black notsuper dark so I assumed it needed to be ran a few times but it stopped emitting ink altogether not sure why I believe it’s clogged also I enabled color prints but color was never printed

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The pigment to sublimation swap isn't something you can just "swap"! You also have to use it far more regularly once you swap to sublimation because it's heavier and more prone to clogging! To swap an Epson to sublimation ink, you have to use a cleaning fluid like this and clean EVERYTHING (and I mean that, even the service station!) except the waste ink pads. Depending on the damage done, you may need PiezoFlush.

If you don't clean the heads and service station (don't worry about contaminating the waste ink pad, it's quarantined to the base of the printer and is used as a dumping ground during cleaning cycles), you risk this exact issue -- this is why if you want to use sublimation ink, the recommendation is to buy a new printer and use it for sublimation from the beginning (Epson ET to dodge the Epson ink DRM or Canon Megatank). Yes, you CAN convert a non-sublimation printer, but it's a pain because you need to do a full printhead flush, clean the service station, and then get ink back through the system with a standard printhead clean (NOT A POWER FLUSH). To switch it back to non-sublimation inks, it's the same process.

Get that cleaner, put it in the head, get whatever is in the printer out until the printhead is fully clean with zero ink traces and then do one more flush and let the printer sit in that state for 24-48 hours. While doing that, you seriously need to pray you don't have ink binding issues -- there's no coming back from a pigment/dye ink bind clog -- the damage is done! I had some refill ink I wasn't sure what it was, and it killed an HP dye inkjet (head was on the printer, not cart) this way -- didn't check because I didn't care enough about it such it's death was fair game. Thank god I didn't mind killing it.

On the other hand, swapping it around on white toner printers is safe, but you need to buy a black drum to get the black developer. For example, I can buy a Crio (Oki) or Unicolor (Ricoh) white toner printer and buy a black drum if I never intend to use it as a transfer printer and I merely just inherited it from a shop retiring their equipment. Supplies may be a little hard to find or I may need to get them through Crio if I can't find the Oki versions as I'm in the US (Crio uses the same chips as Oki, so if I can't buy through Crio I can get it through Oki). For the Unicolor Ricohs, I just need to find the Ricoh version of the printer and see if there's chip trickery. Unlike inkjets, the swap can be done at a price.

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