| 摘要 |
In a television receiver regulated power supply that is responsive to the state of a remote on/off command signal, the AC mains supply voltage is connected to the input terminals of a bridge rectifier through the mechanical switch portion of an on/off relay. A remote control circuit energizes the relay coil to close the mechanical switch upon receipt of the on-state command signal. The bridge rectifier then develops an unregulated DC voltage that is applied to a high frequency inverter for developing an alternating polarity input voltage. The alternating polarity input voltage is applied to a self-regulating or ferroresonant power supply circuit to produce regulated output voltages for various television receiver load circuits such as the ultor load and the horizontal deflection circuit. During a fault operating condition of the self-regulating circuit wherein the output voltages would tend to increase excessively, a protection circuit detects the occurrence of the fault operating condition and disables the remote control circuit to deenergize the relay coil and open the mechanical on/off switch. Operation of the self-regulating circuit stops to thereby deenergize the television receiver load circuits. |
