![]() Description: Auto-toner sensor-Y abnormality (upper limit).Check if there is any foreign matter such as toner in the connector of the auto toner sensor.Check the connectors and harnesses between the auto toner sensor and LGC board (CN340).Remove any toner or dust on the EPU sensor connector and the drawer connector on the equipment side.Remove any toner or dust on the ATC sensor connector and the drawer connector of the process cover.Check if the amount of the developer material is too large or too small.Check if the developer material is too light visually.Check that the mixer of the developer unit is rotated.Check that the developer unit and coupling on the equipment side are properly engaged.Check if the developer unit is installed properly.Turn the code 08-2692 "Prevention of color toner low density / ON/OFF setting" to ON, and then set number of sheets to be judged at the code 08- 2693 "Prevention of color toner low density/Judged number of sheets setting". ![]() Is the color printing ratio 5% or more? Yes 2 No The color toner low density might be the cause. Causes: Auto toner sensor Harness LGC board Developer material.Description: Auto-toner sensor-M abnormality (lower limit).
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