Toner density control method for image recording apparatus and apparatus for the same

摘要

This invention relates to a toner density control method for an image recording apparatus including the steps of: obtaining, as a sensitivity of a toner density sensor, a change amount in output voltage of the sensor with respect to that in control voltage for controlling a strength of the magnetic field generated by the sensor; calculating a ratio of the sensitivity of the sensor to that of a standard toner density sensor, thus obtaining a correction value; discriminating which one of plurality of ranges bounded in accordance with operational results of a value of the output voltage of the standard toner density sensor and the correction value of the output voltage of the sensor belongs to, and changing a replenishing amount of the toner on the basis of a discrimination result, and relates to an apparatus for practicing the method.