| 摘要 |
PROBLEM TO BE SOLVED: To make it easy for a user to set a differential voltage level by paying much attention to a light emitting diode by a method wherein a divided and set voltage value when informed is set as the differential voltage level by an adjustment volume. SOLUTION: A voltage difference between terminal voltages of a fore-stage capacitor and a back-stage capacitor which are converted by an auxiliary transformer PT, a rectifying and smoothing section 2, and a signal amplifying section 3 and a voltage value which can be divided and set by an adjustment volume 6 are compared by a CPU 4. When the voltage value divided and set manually is larger than the differential voltage level, it is informed by a light emitting diode 7. |
