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the drum unit. on the part of the unit that goes first in machine is
the is waste toner container. on each side of the container there is a
screw, remove one screw and pull out the cover. slant the unit and the
waste will come out
C7980, Defective waste toner sensor or engine board. Try this, shake the process unit from side to side and turn the power switch off and then on. If the problem cannot be soved, replace the process unit. After replacing the proces sunit, turn the power switch off then on. If the problem cannot be solved, replace the waste toner sensor or the engine board.
Your problem is heat related, or the lack of heating at least. one of 2 things went wrong here... either the fuser unit overheated causing the thermal fuse (aka the thermostat) to blow, or the heating lamp in the fuser unit is blown. Basically the 6000 code is displayed when your machine fails to reach the correct temparature at a specific time. Unfortunately you will have to call a service person to check which to of the mentioned components are at fault and to replace that component for you. After replacing, the component the code will still be displayed as a safety measure, so the service representative will need to clear the code via the machine's service mode