The LA7840 is a field deflection output integrated circuit produced by Sanyo. The circuit uses a DC-coupled input. The video signal processing circuit controlled by the bus, such as the LA76810 output field sawtooth voltage, is amplified by the LA7840 to directly drive the field deflection coil. The internal circuit of LA7840 includes sawtooth voltage operational amplifier, overheat protection circuit, pump power supply circuit and so on. Operating current is 1.8A for small screen TVs. The chip has low power consumption, small crossover distortion, single power supply, and simple structure and few external components. Measuring model for Hisense TC2199A using MF10B multimeter online resistance using R1k block KNB1-63 Miniature Circuit Breaker
KNB1-63 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.
KNB1-63 Miniature Circuit Breaker,Electronics Miniature Circuits Breaker,Automatic Miniature Circuit Breaker,Mini Circuit Breaker Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.zjmannualmotorstarter.com Pin number Label Features Voltage value V Resistance to ground k Black pen grounding Red pen grounding 1 GND Ground 0 0 0 2 V OUT Field scan output 12.5 1.0 1.0 3 VCC2 Pump power supply voltage input 24.8 6.3 & 4 NON-INV IN Field sawtooth voltage input 2.5 2.2 2.5 5 INV IN Inverting input 2.5 4.4 4.1 6 VCC voltage 24.3 6.3 18.5 7 PUMP UP Pump power output 1.9 7.5 35