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I have a LP7500 and these days the printer present continued PAPER JAMMING IN  PAPER EXPOSURE ADVANCE UNIT AND PAPER SUPPLY UNIT, and the margin of print sizes are descalibrated ( for example print size 15x21b is configurated up: 40mm left 40mm, right:40 mm and down:40mm and the product printed is up 60mm left 50mm right 40mm and down 20mm) also ocasionally display error  6901-512 ARCNET COMUNICATION ERROR,, I cleaning the Paper supply Unit and paper exposure but problem persist, please help me.

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  • 9 months later...

Hi all, quite new here but I've come across this forum while I was researching on my error, I am getting the same error and I am using a LP 7100, I've come across everything that the manual has told me, cleaned the sensors and also the sensor adjustment as what was mentioned above...any more troubleshooting tips out there? Thank you very much in advance

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