Fault model: Konka color TV P21TK828
Fault phenomenon: three trouble-free maintenance process: visually check the fuse is intact, measure the main filter, B+ no short circuit, plug the main measurement 300V, B+ voltage 48V, but the power indicator is still not bright, then measure the optocoupler 1, 2 feet 1V The optocoupler has been working, and the B+ voltage is low and the power supply should be unrelated. Because the indicator light is not bright, it is estimated that the CPU power supply is not normal. First, measure the 8-pin voltage of the memory to 0.5V. The power-off memory 8 feet are not short-circuited to the ground. The back-test switching power supply CPU power supply group has 6V output. A fault was found when the N952 was found from the 8 feet with a magnifying glass. After processing, the optocoupler is repaired and the TV is normal.
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KNB1-32 Miniature Circuit Breaker
KNB1-32 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
KNB1-32 Miniature Circuit Breaker,KNB1-32 Electronics Miniature Circuits Breaker,KNB1-32 Automatic Miniature Circuit Breaker,KNB1-32 Mini Circuit Breaker
Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.zjaccontactor.com