Xerox Phaser 7500 077-900 error

I have a Xerox Phaser 7500 that starts printing from tray 2 and jams every time.  It gives me an error 077-900.  I have checked the Xerox website but I cannot find any documentation on what is causing this error code.
Eric BrunningAsked:
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ROCKDUDEMMML11Connect With a Mentor Commented:
Check your email Header "7500 Diagram"
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Eric BrunningAuthor Commented:
I finally found the error code on the Xerox website however it just states to clear the jam and power off the printer for 45 seconds.  I noticed that this is the process for several of the error codes.  I verified that there are no remanants of paper in the path and that the printer is powered off for over 45 seconds......but printer still jams and gives the same error code.
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ROCKDUDEMMML11Commented:
The code stands for "Registration Sensor Static Jam"

Most likely culprit is a torn piece of paper blocking the registration sensor.

If there is no blockage of the registration sensor, then run sensor diagnostics and check status
of sensors. Replace sensor if diagnostics show it closed when it should be open.

Rockdudemmml11
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Rodney BarnhardtServer AdministratorCommented:
I have seen a very small piece of paper stuck in the track. I had to bascially disassemble the printer to be able to see it. Also, have you tried changing the pickup rollers (or try cleaning them with alcohol as a test). It could be that the paper doesn't reach the sensor in time because there is a pick problem. This is all set on time the sensor expects to see the leading edge of the paper.
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Eric BrunningAuthor Commented:
Do you know where I can get a diagram showing where the sensor is and pickup rollers.
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Rodney BarnhardtServer AdministratorCommented:
Unfortunately not. Xerox seems to keep all of the tight under wraps. I have even had trouble getting part since they typically only sell to "authorized service providers". Since I have worked on printers for nearly 20 years, I usually just start disassembling them carefully until I get to that area. A flashlight also helps in looking into the path. I have been able to either tell there was a small piece of paper before getting too far in, or been able to see that there was and work at getting it out.
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ROCKDUDEMMML11Commented:
Okay the part number for the sensor is #930W00111.

If you send me your email I can send you the parts diagram showing where the sensor is.

Rockdudemmml11
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Eric BrunningAuthor Commented:
my email is ebrunning@smusd.com
Thanks
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Eric BrunningAuthor Commented:
Rockdudemmml11.......did you send the parts diagram showing where the sensor is?  I have been checking my email, but nothing has come through yet........thanks
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