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C2556 Abnormally high toner
density detected yellow
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 11 % or more for a
given number of times consecutively.
• When the connector of the TCR sensor is
Main hopper toner replenishing motor M8 failure to turn.The output from toner bottle home position sensor does not go high within 5 seconds after M8 motor has been energized.Verify the conectors,sensor and motor.Open the front door,turn the toner bottle 1/4 turn clockwise manually with the bottle holder closed.Under the above condition does the toner bottle turn when the front door inter lock switch is turned on?NO - change the toner replenishing M8 motor.Does the toner bottle stop at home position after turning?NO- change PC35 toner bottle home position sensor.Recomanded use vacuum cleaner.
Hi, you need to open front cover, on left side you will see blue cover wich you ned to open to get to the toner, automatically the copier turns the enpty toner to "pull out" position, in your case its black tube, wich you need rotate clock wise and pull out. Then insert new tube, hold it and pull out the ribbon, all the way out and rotate tube anticlockvise. Close all covers and machine starts toner replenishing.
Abnormally low toner density detected Magenta ATDC Sensor
T/C 0.21 % or less is detected ten consecutive times in the Developing Unit as validated through the toner replenishing amount determination control.
Check Developer unit, check toner supply ratio in the service mode, under Image Process control and make sure that Toner motor is sping and adding toner into Dev. unit. Also check and see if you have enough Developer. clean ATDC sensor and run Image Quality adjustment
check under the drum, if there is excess toner there it is most likely coming from the drum unit or the cleaning unit, this is a unit that is on the drum and is supposed to remove any excess toner and dump it into a waste container. it may be full or blocked