To reduce the number of connection lines to send a sleep release signal to a sleep controller from a detected signal generator circuit.

This control system has a sleep controller 2, a print engine controller 3 to carry out printing, a detected signal generator 4 to detect the cause to release sleeping and to generate a sleep release signal depending on the cause, a signal collecting circuit 11 to collect the sleep release signals generated in the detected signal generator 4 into a single sleep release signal, a single connection line 12 to send the collected sleep release signal generated in the signal collecting circuit 11, and a consumption power saving circuit 8 controlled by the sleep controller and to cut off power to the print engine controller 3.