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例1:一台TCL王牌AT2590型64cm(25英寸)纯平彩电,开“机三无”。查“行管”Q40(2BU4508AX)击穿、行供电保险电阻R40(11Ω/1W)断路。仔细检查开关电源输出的主电压140V,正常,行逆程电容正常,有关电路无其他短路性故障。将损坏的元件更换“,行管”Q402用C5297代换,R401仍用1Ω/1W
Example 1: A TCL Ace AT2590 type 64cm (25 inches) flat-panel color TV, open the “machine three no.” Check “line control” Q40 (2BU4508AX) breakdown, the line power supply insurance resistor R40 (11Ω / 1W) open circuit. Carefully check the main power output of the switching power supply 140V, normal, reverse circuit capacitance is normal, the circuit no other short-circuit fault. Will damage the replacement of components, “line management” Q402 substituted with C5297, R401 still 1Ω / 1W