Model: Hisense TPW5029D
Movement: Plasma-MST6
Fault phenomenon: AV2 picture flash, black screen analysis and maintenance: power on check, AV1 input is normal, the image starts normal when AV2 is input, then the distortion is unstable, until the black screen appears, the sound is always normal.
Analysis Because the AV1 input is normal, the problem of signal processing and channel of the latter stage is eliminated. Then the problem can only be found in the AV2 input or the signal input switching part. However, since the signal input can be normally displayed at the beginning, the possibility of malfunction due to a defective switching circuit is eliminated. A closer look reveals that when the image is distorted, the brightness of the image is higher, and a black screen appears. Therefore, it is suspected that the signal input terminal impedance mismatch is caused. After checking, it is found that the resistance of the signal input terminal matching resistor R210 is unstable, and its resistance value varies between infinity and hundreds of ohms, and the fault is eliminated after replacement. The reason is also caused by the frequent plugging and unplugging of AV cables.
Residual Current Circuit Breaker With Over Load Protection
TWO FUNCTION : MCB AND RCCB FUNCTIONS
leakage breaker is suitable for the leakage protection of the line of AC 50/60Hz, rated voltage single phase 240V, rated current up to 63A. When there is human electricity shock or if the leakage current of the line exceeds the prescribed value, it will automatically cut off the power within 0.1s to protect human safety and prevent the accident due to the current leakage.
leakage breaker can protect against overload and short-circuit. It can be used to protect the line from being overloaded and short-circuited as wellas infrequent changeover of the line in normal situation. It complies with standard of IEC/EN61009-1 and GB16917.1.
RCBO,ELCB,Leakage Circuit Breaker,Residual Current Circuit Breaker,Residual Current Circuit Breaker with Over Load Protection 1p,Residual Current Circuit Breaker with Over Load Protection 2p
Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.zjaccontactor.com