To enter Service Diagnostics on Xerox Phaser 6500:
1.turn the printer off ;
2.press and hold both the Up and Down arrows and turn the printer on ;
3.when Service Mode and ESS Diag appear on the display, release the buttons. You will need a Service Menu Map to navigate through the menus, they are quite complicated.
This error comes due to NV RAMof the printer. To diagnose this issue you'll need to reset the NV RAM of your printer, you can do that by entering the service mode. To do this turn on the machine. Press menu button the printer. Press scan button, then press copy and then scan button again to enter the service mode. Use > to go to NV RAM access. Set abs-m level to 0. Set abs-p level to 0. Press stop to exit.
This will resolve your issue. If still not resolved then try the above procedure by restarting it once.
Daniel Scott
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