7.Detailed Descriptions 
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Normally, the AIO is replaced by the user. But some users will refill the old AIO with toner, and use the 
same AIO again. If this occurs, the used toner tank will not be emptied. So there must be a way to stop 
users from repeatedly filling the old AIO with fresh toner. 
How does the machine know if the AIO is a new one? 
The AIO has serial number information on a chip. The machine checks this number when the AIO is 
placed in the machine.