Causes:Auto toner sensor Harness LGC board Developer material High-voltage transformer
Remedy:1 Developer unit • Check if the developer unit is installed properly. • Check that the developer unit and coupling on the equipment side are properly engaged. • Check that the mixer of the developer unit is rotated. • Check if the amount of the developer material is too large or too small. • Remove any toner or dust on the autotoner sensor connector and the drawer connector of the process cover. • Remove any toner or dust on the EPU sensor connector and the drawer connector on the equipment side. 2 Auto toner sensor LGC board • Check the connectors and harnesses between the auto toner sensor and LGC board (CN347). • Check if there is any foreign matter such as toner in the connector of the auto toner sensor. Remove if there is and reconnect it.
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