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HP T7100 Has "Paper Jam" but no paper present in system

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Recently replaced the belt and tensioner assembly on my Plotter Printer. Assembled, now the printer keeps returning a "paper jam" error. No paper is present in the system. I've followed the steps outlined in the maintenance manual to ensure there is no paper in the printer- but this issue keeps coming up. 


The service tech (IMO did a lousy job addressing the printer) told me the Encoder Strip might be dirty- and that causes the "paper jam" error. I'm skeptical this is the problem but open to any solutions.

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Please correctly put the roll paper in the spindle. . ..Make it's tied. ....once try to load the paper it should comes on the blue line. ....sometimes paper wasn't sensing in the paper platons....


If possible share your printer display error status. 

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I have that same problem. Did you solve the problem?

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