| 摘要 |
<p>An image forming apparatus (100) includes photosensitive drums (1a-1d); drum charging members (2a-2d), an AC voltage source (21) for outputting an AC voltage commonly to at least two of the charging members; an AC voltage control devices for the charging members; variable resisters (40a-40c)connected between the AC voltage source and the at least two charging members, respectively; use situation detecting means (50) for detecting use situations of the drums, respectively; and adjusting means (70) for adjusting electric resistances of the variable resisters, respectively. The adjusting means (70) adjusts the electric resistances of the resisters in accordance with the detection results of the use situation detecting means (50) such that the discharge currents applied to the at least two charging members are within predetermined ranges, respectively.</p> |
