论文部分内容阅读
乐华彩电CP5432P/N、CP5436～39P/N、TC374P/N等机型的开关电源均采用开关电源专用集成电路TEA2261,具有输入电压、稳定及完善的过压、过流保护功能。电路如图1所示。属并联型脉宽调制式稳压电源,起振后采用它激方式。电源本身可以独立工作,即可断开电源的各路负载单独进行检修。V701为电源开关管,N701(TEA2261)为激励集成电路,V702为稳压放大管,R711为输出电压调整电位器。有两路直流电压输出:+B(112 V)和18 V。本文通过实例介绍其检修方法。
Lehua color TV CP5432P / N, CP5436 ~ 39P / N, TC374P / N and other models of switching power supply are used switching power supply ASIC TEA2261, with input voltage, stable and perfect over-voltage, over-current protection. Circuit shown in Figure 1. Is a parallel pulse-width modulation power supply, after the start-up using it exciting way. Power itself can work independently, you can disconnect the power of the various load alone overhaul. V701 for the power switch, N701 (TEA2261) to stimulate the integrated circuit, V702 for the regulator amplifier, R711 for the output voltage adjustment potentiometer. There are two DC voltage outputs: + B (112 V) and 18 V. This article introduces the maintenance methods through examples.