Image forming apparatus capable of reading data of drum cartridge and data of toner cartridge through board of toner cartridge

An image forming apparatus comprising:

• a drum cartridge including:
• a photosensitive drum;
• a drum memory storing therein data relating to the drum cartridge;
• and
• a first drum electrical contact for communication of data stored in the drum memory, the first drum electrical contact being electrically connected to the drum memory;
• a toner cartridge including:
• a casing configured to accommodate toner therein;
• and
• a board including:
• a first electrical contact making contact with the first drum electrical contact;
• a first relay electrical contact for relaying the data stored in the drum memory, the first relay electrical contact being electrically connected to the first electrical contact;
• a toner memory storing therein data relating to the toner cartridge;
• and
• a first toner electrical contact for communication of data stored in the toner memory, the first toner electrical contact being electrically connected to the toner memory;
• a toner data electrical contact surface making contact with the first toner electrical contact;
• a drum data electrical contact surface making contact with the first relay electrical contact;
• and
• a controller configured to:
• read the data stored in the drum memory through the drum data electrical contact surface;
• and
• read the data stored in the toner memory through the toner data electrical contact surface.