MK channel blocked in an Epson Stylus Pro 7700


Did you switch to PK and do a nozzle check? This determines if the block is at the cartridge end or at the damper or after the damper.

Most likely you need a new damper.



I picked up an old Epson Stylus Pro 7700.
I’ve been cleaning the heads etc. All channels ar now perfect except the MK channel. The printer came with a none OEM Matt Black cartridge which i changed out fr an original Epson Matt Black. But it is still blocked. What would you advise.


Are you able to advise how to switch to PK as I have only bought this a week ago and it didn’t come with a manual. Thank you for your suggestions and is a damper easy to fit?
Kindest Regards A


Here’s the user manual.…0…1.1.64.psy-ab…0.2.218…0i13k1j0i8i13i30k1.0.ZFUh6CotqQ0

If you are new to all of this you need to get an epson tech or friend who is technically minded to replace the dampers. has dampers.



Is there a video or step by step guide to changing the dampers or was reading that it would be easier to replace the selector unit which includes the dampers?

#7 has the repair manual for this printer with photographs and instructions.