Patent ID: 8570545

Claim:
An image forming apparatus comprising: a main body including a main body storage part; a first image forming unit removably attached to said main body, wherein said first image forming unit includes a first storage part storing first information indicative of whether or not an initial adjustment of said first imaging forming unit has been completed; a second image forming unit removably attached to said main body, wherein said main body storage part stores second information indicative of a usage history of said second image forming unit, wherein the second image forming unit does not have a storage part storing second information; a determination part determining whether or not said first information stored in said first storage part and said second information stored in said main body storage part satisfy respective prescribed conditions; and an initial adjustment part causing said first and second image forming units to be agitated simultaneously as the initial adjustment when said first information indicates that the initial adjustment of said first image forming unit has not been completed and said second information indicates that the second image forming unit corresponds to an unused state.