Question about Xerox Phaser 7400/DXF Laser Printer

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PRINTER ERROR Xerox Phaser 7400 /DXF Laser Error 940

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  • Anonymous Dec 20, 2007

    keep getting report fault error 940 every couple of months

  • bkrenning Jul 09, 2008

    Users complain printer will grind but still prints then displays a 940 error. The service manual indicates a 940 error is related to the waste toner auger, motor and/or sensors. Toner appears to backup in tubing causing cyan chute to overflow. I've cleaned up the toner, manually emptied the waste toner reservoir & manually rotated the waste toner auger motor. Printer will work fine for a day or two then again displays the 940 error. I'm going to try replacing the waste toner auger motor even though it appears to function normally.



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There is a tiny little magnet that falls off and/or has reportedly been put on backwards (fell off is what happened to me) on the auger assembly. It's near the black auger chute on the end of a shaft. It's tiny--a little bigger than a grain of rice. I had to replace the auger shaft assembly but if you can find the magnet, you can super glue it back on.

Posted on Jan 17, 2009

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The grinding noise is caused by a worn or bad gear in the drum unit.

(if you are refilling the toner cartridges you may be overfilling, causing the gears to grind).

Also make sure the Imaging Unit basket is properly latched, some machines have a tendency to work loose over time.

Posted on Jan 17, 2009


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