| 摘要 |
In case the output of an antenna member does not return to a first level even after an execution of a toner replenishing operation for a predetermined period from a state where an image forming operation is prohibited, the toner replenishing operation is terminated. Such configuration avoids an unnecessary idle rotation of a developing device at the replacement of the developing device or in case an empty toner cartridge is mounted again on an image forming apparatus, thereby suppressing drawbacks such as an image fog or an image density loss.
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