Thanks for getting back tom! And I'm sorry to hear that. I was hoping you had fixed it and would know something about it. What kind of grease/lube do they use for drive gears and such? Do these consumer printers ever need lubrication?
My Pixma TS8350 was making some annoying noise, but it was working fine. So I decided to spray it with a synthetic adhesive lubricant that thickens as it dries and doesn't run. I was mindful of what lubricant I use. I sprayed it at the back where the motor and drive gears are located, on the right side, because that's where the noise was coming from. It was using the roller cleaning function, so I sprayed it while the printer was running.
After that, it first gave me error code 1300 for paper jam. But there were no papers in the printer! Then after a few power cycles I tried to print a Word document, and then it gave me error code 6A80, the same as you had. This is also related to a paper jam I think, but a more "serious" service code by the looks of it (alphanumeric). The printer now prints a blank paper every time I power it on, and shows me 6A80 code. It's as if it still has that old printout in its memory and tells me to cancel the print and restart the printer, and if it doesn't help, to contact a service center. It's as if it's upset that I tried to print a new page without taking care of the "paper jam" first.
Is it done for now? Time to buy a new one?