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only 3 years old TR8520. it first stopped ADF copying from mid 2021, now it prints out only Blank Papers while everything else works - it scans, faxes, but when it prints it prints only blanks. It is not the ink because I installed a new set inks of ...

My TR8520 Stopped Copying any sizes of simple letters and documents from the tray (error mesage) since months ago, though copying from platen glass has been OK. I can't figure out what went wrong. Anyone knows why and what the solution is? Thank You!...