Abstract: A system and method for diagnosing a home appliance are disclosed. The home appliance outputs product information as a predetermined sound signal, and transmits the sound signal to a service center of a remote site over a communication network, such that a service technician of the service center can easily check a current status of the home appliance. The diagnostic system effectively detects data using multiple synchronous signals having a time difference, quickly diagnoses a current status or fault of the home appliance, provides a service for more correctly diagnosing a faulty operation of the home appliance, and increases user satisfaction and reliability.

Abstract: A home appliance system and an operation method thereof are disclosed. The home appliance outputs product information as a predetermined sound and transmits the sound through a connected communication network, thereby making it easier for a service center at a remote place to check a status of the home appliance. Further, the home appliance system and operation method thereof prevents noise or signal error generated in the procedure of converting product information into a signal of a predetermined frequency band in order to output the product information as a sound, thus enabling stable signal conversion and improving the accuracy of information transmission using the output of sound.

Abstract: Disclosed is a method for fine recording of video frames at the contiguous recording portion on the video tape. The fine recording is accomplished by inserting a position identification code, which is generated in a serial order, into every frame of a video signal, recording the resultant video signal on a video tape, memorizing the position identification code of the last frame recorded on the tape when the recording is stopped temporarily, and locating the starting track of the subsequent recording correctly by using the memorized position identification codes when the temporary stop mode is canceled. Thus, the method avoids overlap and eliminates a blank section between the last track of the preceding recorded video signal and the beginning track of the subsequent recorded video signal, which often occur at the recording joint portion on the video tape when the tape is abruptly driven at an initial transient movement due to mode transition between the recording and pause modes.