A discharge failure nozzle, which cannot print, can be complemented by a printable discharge nozzle according to a simple, low-cost method capable of a high-speed process. An output signal given to the PMOS transistor included in each of the level shifters is an output signal of the level shifter which receives the clock signal whose phase delay amount with respect to the clock signal given to the NMOS transistor included in that level shifter is a phase amount X. Instead, the data is stored along with an identifier determined from characteristics or attributes of the electronic device. A flag is set to indicate the occurrence of the condition, and the fetch address is stored in a register. The manager 4 then transmits an associated information service message 18b to the customer agent 9.