I have an Epson 9880 with 2 segments of the yellow channel not firing. The prints all look fine. I am wondering what to do. Should I try an Ultrasonic Cleaner? Perhaps inject some magic bullet into the head after removing the dampers? I have replaced the dampers, wiper blade and capping top so far.
www.printerknowledge.com/threads/service-tool-v3400-does-not-work-on-canon-pixma-mg-3520.13746/

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