Can't unclog one last color

4900

#1

Dear All,
Green channel on my 4900 stays clogged even after countless (with piezoflush) ink charges, power cleaning, windexing…
All the other colours now run smoothly, I can’t get rid just of this one.
The fluid level in the cartridge has not moved at all.

Can you suggest a solution?

Thanks, Tomas


#2

Is this using a cartridge that previously allowed ink to pass through the print head? When did this complete stoppage occur and what have you done since?


#3

Originally, there was an Epson cartridge, which I believe worked, then the printer wasn’t used for about a year (all channels clogged). After I bought it, I put windex-soaked pads under the printhead (unclogged 6 colors), and then worked with Piezoflush as per the instructions (1-2 months ago). Yesterday, I put windex into the green cartridge and did an initial charge.

During cleaning/initial charge, the printer makes a weird sound (only on the left side), as if it was trying to pump out something from the cartridge but couldn’t.
Perhaps it is clogged just at the beginning of the channel?


#4

Please remove the cartridge, using the Priming tip at the end of your syringe, see if you can pull a prime on the cartridge through the exit valve, as you would have before installing it into the printer. This will tell you if it’s the cartridge exit valve that is blocked. If it is not, this leaves the Damper, Print Head OR capping station that is not allowing ink to pass through the ink line for this position. This printer model is a real bear to get into to clean the Capping station and bottom of the print head effectively.

In addition, leaving a printer sitting for an entire year with Pigment inks installed is never a good idea, especially with this printer platform. The heads are intolerable of drying pigments and clog VERY easily, even with regular/frequent use. Once the print head has a clog in the channel it is sometimes very difficult to remove it, even with Piezoflush or Windex due to the design of the channels in the head, as well as the inaccessible capping station and Print head.