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Sir/Mam the Drum Motor is failing to turn the drum it self mite be jammed. Not allowing the motor to turn . Remove the drum cartridge. And see if you can turn the drum with your fingers DO NOT TOUCH The color part of the drum turn by both thumbs on the edge of the drum TURN CLOCKWISE if you turn Counter clockwise you will flip the cleaning blade that is not good. The cleaning blade removes the old toner before the new image is placed on the drum if it looks yellow then get a new one and replace it. IF you think the drum is stuck to the cleaning blade then for about a half inch push the drum counter clockwise the then clockwise. Also might remove he drum to see if its jammed. Also the motor might be bad or the circuit board that replaces it.
Remove the fuser (The hot unit) fist and check for broken gears or jammed gears. Next check the gears in the rear where you removed the fuser. also remove the drum cartridge and check that the drum rotates ok do not touch the drum must use the sides only. Turn only in the clock wise or you might flip the cleaning blade. Which is what removes the old toner before the next image is placed on the drum. If it is yellow looking replace it. Located on the left side of the drum. Open close the front door reset the code.
Remove the imaging unit ,remove the charge corona assy,remove the OPC drum,remove 2 screw and dump the developer out.Reinstall the imaging unit ,pull out the toner cartridge and push in toner cartride ocation the developer cartridge.Turn on the copier and wait then the copier perform the new developer initialization.Whwn the Start button in ready(green light),change the developer cartridge to toner cartridge.
Check the fuser unit remove it (THE HOT PART) check for broken gears and also check inside once removed, also check the drum assy., check that drum can turn remove image unit, the using thumbs on each end turn the drum clockwise. if the cleaning blade is yellow replace it.
You need to open the front door and grab the toner/drum unit and pull as hard as you need to. once the assy. comes out you press the blue button on the left side and the toner cartridge will separate from the drum unit. install the new toner or remove the paper jam as required. call if you need more info. 805-520-3003 steven
It is not actually a paper jam - when the copier detects a malfunction, it simply stops everything. Paper jams all have "J" codes (J1, J3, etc.).
A CF3 indicates a problem with the ATDC system (Automatic Toner Density Control). The output from the ATDC sensor is outside normal specs.
Possible causes would include the copier being run (and reset repeatedly) without toner, the imaging unit not being properly installed (or not present at all), use of toner not compatible with the unit, a defective ATDC sensor or (least likely) PWB-A.
CF3 - ATDC sensor malfuntion. This sensor measures the density between toner and developer. You might have a problem with too short developer. Add some more and do F8.
The manual says basically that you either have a problem with de sensor (under a bottom plastic plate of the image unit) or the main board (PWB-A).