Chosen Solution
Epson WF-7620 prints blurry every 7 lines only when using black ink.
I had to return under guarantee. The nozzles are blocked and has to be sent away for repair. Epson call Centre were brilliant I received a replacement and old one taken away. There is no solution to this problem.
This is a very common problem in the printers. There are various reasons behind this problem. If you are using the HP printer, solve your problem by clicking on the given link- https://notresponding.net/canon-printer-…
I have the same problem. I appears to be a driver issue. If I print from the Epson i-print app from my phone, it prints fine. Printer worked well on Windows 7 computer. Upgrade to Windows 10 is the problem. Driver doesn’t seem compatible with Windows 10.
If you are running any Epson driver software on your computer, you should be able to run a variety of tests, including ink cleaning, nozzle tests, and head realignment.
