| 摘要 |
An image forming apparatus is provided. The image forming apparatus includes a source, voltage generator to generate a source voltage to provide developing units with a power-supply voltage, a second voltage generator to generate a developing bias voltage applied to a developing roller and a supply bias voltage applied to a supply roller upon receiving the source voltage generated by the source voltage generator, and a switching unit to selectively provide the developing units with different voltage levels generated by the second voltage generator. The apparatus includes a Zener diode installed at a common end, so that a deviation of the developing voltage applied to the developing device affected by a deviation of Zener diode components can be reduced, resulting in an increased color image quality and a reduction in production costs. |
