An apparatus includes a function control device (100) to provide a specific function to the apparatus (1), a network control device (120) to control communication between the apparatus (1) and other apparatus via a network, and a main control device (110) to control operation of the apparatus (1). The network control device (120) operates while communication with the function control device (100) is being cut off when the function control device (100) is not supplied with power, The function control device (100) includes a user circuit (103) to detect restarting of a power supply to the function control device (100), and establish communication with the network control device (120) in response to detection of restarting of the power supply to the function control device (100). The main control device (110) controls communication between the apparatus (1) and the other apparatus, through communication established between the main control device (110) and the function control device (100) and communication established between the function control device (100) and the network control device (120).
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