| 摘要 |
PURPOSE: A failure diagnosis system of a speaker is provided to solve the inconvenience by the separate power line laying and is provided to reduce the installation cost. CONSTITUTION: A failure diagnosis system of a speaker is comprised of a speaker unit (10-10+N), an amplifier (20), a diagnosis result collector (30), and a controller (40). More than one speaker units are connected with an amplifier and a signal line transmitting the broadcasting signal, diagnosis the failure of speaker by using the output of amplifier as the driving power, and output the diagnosis result as the signal line. The diagnosis result collector collects the diagnosis result, which combines with the signal line and which is outputted from at least one speaker unit. The controller demodulates the diagnosis result, which his collected in the diagnosis result collector, as the original signal, analyzes the demodulated signal, and indicates the speaker failure status. [Reference numerals] (20) Amplifier; (30) Diagnosis result collector; (40) Controller; (AA) Amplifier output; (BB) FSK communication |
