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Constant voltage control of DC bias and AC bias
The primary AC bias control circuits on the DC controller PCB control the DC bias and AC bias applied to the primary charging roller to keep their voltage at the fixed level.
The primary AC bias control circuits control constant voltage control and current quantity of electric discharge control of the AC bias by the environment.
* The current quantity of electric discharge control minimizes charged AC bias to lengthen drum life. Electric discharge product on the drum decreases by decreasing the primary AC bias. Therefore, the image smear by fusion with the water decrease.