| 摘要 |
In a laser printer, when a sheet of paper, which is to be supplied in between a photosensitive drum and a transfer roller, is jammed, after the sheet of paper is removed and the jam is cleared up, a developing jam control program is executed to rotate a drum cleaning roller at a rotational speed higher than a normal rotational speed and to apply the transfer roller with a reverse bias voltage whose polarity is the same as that of the charged toner.
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