Image forming apparatus and developer replenishment control method

摘要

After a toner empty state, toner is filled. Following the filling of toner, a forcible toner replenishment mode is performed. After release of the forcible toner replenishment mode, a printer CPU replenishes only fresh toner and does not replenish recycled toner while image formation is performed on a predetermined number of paper sheets or while a developing device is driven for a predetermined time.