彩电三无检修方法.doc

彩电三无检修方法
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline oy, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
3C）击穿短路最常见；
4）开机后扫面板上的监视指示灯一闪即灭，CPU处于关机状态，按遥控器待机键开机，继电器刚吸合又马上断开，这种故障现象经常会遇到，主要从以下几处着手进行检修：
①若枕校电路工作不正常，则会通过三极管Q754把高电平送到电源板上的PQD2插子的＃1脚（PROTECT），使保护电路动作，切断电源电路各路输出电压，从而起到避免故障范围扩大的作用。通常以三极管Q655（2SD789）损坏最为常见；
②场输出集成电路I601（LA7846N）损坏或场输出回路中有短路的地方，例如：稳压二极管D606（RD30EB3）击穿短路，会造成这种现象；
③投影管损坏也会造成这种故障现象，维修的时候，我们可以通过逐个断开投影管的高压阳极线的办法，来判断故障部位，最终排除故障；
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work