| 摘要 |
PROBLEM TO BE SOLVED: To easily recognize that an abnormality of a power source is generated in one of devices by holding the turned-on state of a power source representing lamp when a power is supplied from a main power source to all of plural devices, and turning on-and-off the lamp when a power is not supplied from the main power source to any one of those devices. SOLUTION: In the case of monitoring the power supply state of plural devices 2, 3, 4,..., the on-state of a power source representative lamp 11a is maintained when a power is supplied from each main power source 2A-4A to all of plural devices 2-4. In this state, if power supply from any of the main power sources 2A-4A is stopped in those plural devices 2-4, and power supply from preliminary power sources 2B-4B is started according to the switching control of power switching parts 22, 32, and 42, the execution of the back-up function of the power source by the power source switching parts 22, 32, and 42 is informed from any of information processing circuits 20, 30, and 40 to an information processing circuit 10 of a receiver main body. Thus, the power source representative lamp 11a goes to the flickering state.
|
