Patent ID: 8615380

Claim:
A diagnostic system for a home appliance, comprising: a diagnostic server configured to receive a sound signal including a product information from the home appliance and diagnose a faulty operation of the home appliance using the received sound signal, wherein the diagnostic server detects data corresponding to the product information using a plurality of synchronous signals generated at intervals of a predetermined time, and diagnoses a current status of the home appliance, a faulty operation, and a cause of the faulty operation through the product information, wherein the diagnostic server extracts a post-preamble estimated as a preamble, generates the plurality of synchronous signals on the basis of the post-preamble, and detects not only a preamble but also data corresponding to the product information on the basis of a predetermined preamble size and a predetermined data size, wherein the diagnostic server includes a clock generator that generates the plurality of synchronous signals at intervals of the predetermined time, and wherein the clock generator generates at least three synchronous signals, each of which corresponds to the post-preamble, at intervals of the predetermined time, and changes a time interval of generating each synchronous signal in response to a symbol time of the sound.