| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrophotographic system for correcting nonuniformity of respective components. SOLUTION: An input voltage Vcont inputted to a correction circuit 14 is controlled by a CPU 9 so that it may be switched to V1/V2/V3 in accordance with the variance of toner concentration. Then, the input voltage, that is, Vcont is switched stepwise in accordance with the variance of the toner concentration, the system is controlled so that the toner concentration may be always, highly accurately detected not only when the toner concentration is high, but also when the toner concentration is low. The correction value ε of the input voltage Vcont is calculated by the correction circuit 14 based on a correction signal Sh, and Vcont+ε is outputted to a magnetic permeability sensor 5. In this case, the ε is a value for correcting the dispersion of the gain of an analog voltage detection circuit inside the magnetic permeability sensor 5, and the value is decided for every mixer unit. Then, the gain of the analog voltage detection circuit is corrected. |
