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接修一台北京牌8351G型“三无”彩电,机主说:该彩电经别人修理已经连续损坏三个“行管”了,换完“行管”最长的看了一天,短的仅十多分钟就“三无”。原修理师傅检查不出来病因,建议让机主花200元换个主板,机主不同意,也不用他修理了,经别人介绍转到我处。开壳检测,发现还是“行管”V432击穿(损坏的“行管”是C2553,图标为D1651),断开行负载,接一假负载试机,+B为稳定的116V,经长时间观测+B始终正常,看来电源
Pick up a Beijing license 8351G “three without” color TV, the owner said: The color TV repair by someone else has been damaged in three consecutive “governed”, change “governed” the longest day, short only ten Multi-minute “three noes.” The original master did not check out the cause of the disease, it is recommended to allow the owner to spend 200 yuan to change a motherboard, the owner does not agree, do not have to repair him, I was introduced by others. Open shell test and found that the “on the line” V432 breakdown (damaged “line control” is C2553, icon D1651), disconnect the line load, then a dummy load test machine, + B for a stable 116V, after a long time Observation + B is always normal, it seems the power supply