46寸RCA液晶电视L46FHD37Ryx7突然全无维修案例
前两天客人送来一台46寸《RCA》液晶电视LCD。型号为：L46FHD37Ryx7。据客人阐述：电视观看2个多小时突然出现“全无”的状况，同时发出有些“燋”的气味，我即判定电视内部某些零件有“烧”的可能了，故我没上电试机，由于客人急着用机（当天有球赛之事），我当即与他开价US$218。先收检查费US$45。叫他下午取机。他回答的是一句0K！于是我即开后盖检查，第一时间将视我把电源板锁定。不出当初判定之料，发现一只MIT一SH一105LM继电器烧穿一个洞。一只5w2R2J电阻被烧爆，一只Cs19电解电容16V1000u鼓包。再检查保险管，奇了，保陪管居然完好。本着先易后难的维修原则，即从旧板拆件代换之，为预防故障重演，将一个110V150w灯泡与保险管串接，上电测试了电源板各电压，发现5VSB电压不稳，以幅度3~5V脉冲式跳动，我沉思片刻：这可能某个电容出现状况，心中一灵，就顺着5VsB线路用电容逐个并接碰触，当能到电源管班VIPer22A一K6V918IC第4脚滤波电解C2I（50V10u）时，这种脉动状况立即消失，随即拆件代换之，上电试机0K！到了下午时分电告主人取机。哈哈！主人还给予奖励US$20哩！上图，谢谢！
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