| 摘要 |
PURPOSE:To suppress the temperature rise in an electronic device and to reduce the noise level at the standby time by controlling the drive voltage of a DC fan motor in a plurality of stages. CONSTITUTION:When an electronic device such as a printer starts printing, the fact that the drive current of a part to be cooled such as a carriage drive motor is, for example, On is discriminated by a discriminator 2, the high voltage (30V) circuit of a drive circuit 4 is conducted by a power source circuit selector 3 to drive a DC fan motor 5. When a series of operations are completed to again become a standby state, the OFF state is discriminated by the operation/stop discriminator 2, a low DC (15V or 5V) circuit of the drive circuit 4 is selected by the selector 3, and the fan motor 5 is driven by the low DE (15V or 5V). |
