Login to the service Meter Count - Stop - 0 - 0 - Stop - 0 - 1; exit - reset. COF 30 - it's a mistake ATDC Sensor (it determines the concentration of toner in the media.) First try to do F8 (adjustment of the sensor), if not work, replace the developer cleanly (with the installation of LEDs instead of a fuse in the back of the imager unit). Could the sensor itself and pass away, but less likely.
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Meter Count - Stop - 0 - 0 - Stop - 0 - 1; exit - reset.
COF 30 - it's a mistake ATDC Sensor (it determines the concentration of toner in the media.)
First try to do F8 (adjustment of the sensor), if not work, replace the developer cleanly (with the installation of LEDs instead of a fuse in the back of the imager unit). Could the sensor itself and pass away, but less likely.