Today I got a new Epson R2880 from a seller on eBay. I made sure that the seller was the only previous owner. They assure me they have owned it from new. The original set of carts were still installed almost at full capacity.
When I received it the nozzle check the seller provided showed that the Cyan and Vivid Magenta channels were blocked. They were reluctant to sell in this state but I was sure that unblocking the nozzles would get those channels printing again.
I began by removing all the Epson carts from the printer. I then cleaned all the nozzles with a clean Q tip and piezoflush on each. Next I used the dummy cartridge to purge the clogged ink from the Cyan and Vivid Magenta channels. Also cleaning the capping station, wiper blade and given the underside of the print head a delicate wipe with a folded bounty towel.
At this point I have only a few small gaps in my nozzle check pattern. Ink is getting through the Cyan and Vivid Magenta channels and showing in a nozzle check where before they were previously blank.
However, now the Very Light Magenta channel is almost completely missing from the nozzle check. With the Epson ink installed this was printing solid without any gaps. Now it's almost completely gone.
I've tried purging this blockage with the dummy cart and run mutiple head cleans but still to no avail.
Why would a channel that was printing fine with OEM carts now be almost blank once installed with piezo after numerous head cleans? I seem to eliminate the problem on one or two stubborn channels and the problem arises again on another channel that was previously printing perfectly. It's always one step forward, two steps back. Same as what was happening with the other printer. I'm absolutely stumped again. Any ideas?