| 摘要 |
According to one embodiment, an image forming apparatus includes: a charging device configured to apply a voltage to a photoconductive drum to set the photoconductive drum to surface potential V0; a laser-beam irradiating unit configured to form an electrostatic latent image having potential Ver on the photoconductive drum; a neutralizing section configured to generate an electrostatic latent image for detection having the potential Ver on the photoconductive drum; a surface-potential detecting section configured to detect the surface potential V0 of the photoconductive drum; a density detecting section configured to detect printing density of a test patch for density measurement; and a control section configured to control, when a contrast potential Vc is adjusted, the surface potential V0 on a negative side at potential equal to or larger than a threshold.
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