| 摘要 |
PURPOSE:To prevent a fault due to defrosting by applying power preheating to a terminal device not in use for a long time by means of partial application of power. CONSTITUTION:A power supply system consists of a power control circuit 1, a 5V power supply 2 applied to an IC and other power supply 3 and the power supplies 2, 3 are controlled by the said power supply control circuit 1 via power application control lines 5, 6. In this case, when a power inputted to a terminal device is applied, only 5V of the low voltage power supply 2 is outputted independently of application.disconnection of the power switch. Since the power is applied to the IC of the control circuit, the mounted printed board itself or its atmosphere is warmed so as to reduce moisture, resulting that defrosting hardly takes place. |
