| 摘要 |
According to the present invention, in an apparatus for diagnosing the failure of a plurality of PA speakers connected to a public address system, a plurality of light emitting devices of an LED lamp for displaying the failure of a speaker unit is formed on a side of the speaker unit. After that, a predetermined pattern or color is displayed by the on/off control of the light emitting device corresponding to the normal state or the failure of the speaker unit. Thereby, the failure of the speaker unit can be easily checked. Also, a manager can immediately recognize the failure of the speaker and can quickly perform maintenance tasks. |
