| 摘要 |
PROBLEM TO BE SOLVED: To obtain efficient operation wherein the power consumption of cooling fans can be suppressed to the minimum and a method for operation for reducing noise, by providing a built-in control circuit which is mounted with a plurality of cooling fans and thermistors and drives a temperature signal of each section detected by the thermistors and the cooling fans. SOLUTION: Thermistors 60-65 are disposed in heating component blocks 80-85 assembled in a main control circuit 30 mounted on a substrate 70 and cooling fans 50-52 are disposed between the heating component blocks 80 and 83, 81 and 84, and 82 and 85, respectively. Due to this structure, when the temperature of the heating component block 80 rises and reaches Tmin, a corresponding temperature signal is transmitted to the main control circuit 30 by the thermistor 60, a given supply voltage is applied to the cooling fan 50, and the wind flows in the N direction. When the temperature of the heating component block 83 rises and reaches Tmin, a corresponding voltage signal is transmitted to the main control circuit 30 by the thermistor 63, the given supply voltage is applied to the cooling fan 50, and the wind flows in the S direction. |
