| 摘要 |
PROBLEM TO BE SOLVED: To prevent the temperature inside a device from increasing excessively by a cooler without using a temperature sensor. SOLUTION: When reproducing a piece of music (A2: YES), a CPU of a Karaoke sing-along machine sets a timer (A3) and increases the selection number of music (A4). When a measurement time by the timer elapses a reference time (A5: YES), after the timer is cleared (A6), it is confirmed that the selection number of music exceeds 10 musics (A7), and if so, it is judged that the temperature inside the device is elevated, and after the selection number of music is cleared (A8), a fan provided inside the device is driven for only a set drive time interval (A9, 10, 11). Thereby, even if the temperature inside the devices is elevated by reproducing continuously Karaoke musics, it is possible to prevent the temperature inside the device from increasing excessively. |
