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(2)显示屏电源电路:主要是测量开关管Q1各极间是否击穿。若击穿,查尖峰吸收回路D8、R4、C9,该电路不工作会使反峰电压击穿Q1,电流增大烧坏熔丝管;再查Q1的G极控制电路:Q01击穿会导致Q1损坏或IC01内部电路故障也会导致Q1击穿或者导通时间过久而烧坏。IC01内部高压电路损坏而烧熔丝管,一般表现为该集成块严重烧黑。(3)PFC(功率因素校正)电路:关键点是测量开关管Q2各极间是否有击穿。若击穿,重点查G极控制电
(2) display power circuit: the main switch Q1 is measured between the breakdown of each pole. If the breakdown, check the peak absorption circuit D8, R4, C9, the circuit does not work will make the anti-peak voltage breakdown Q1, the current increases burn out the fuse tube; and then check the Q1 G pole control circuit: Q01 breakdown will lead to Q1 damage or IC01 internal circuit failure can also lead to Q1 breakdown or on-time too long and burn out. IC01 internal high-voltage circuit damage and burning fuse tube, the general performance of the block serious black burn. (3) PFC (Power Factor Correction) circuit: The key point is to measure whether there is a breakdown between the poles of the switch Q2. If the breakdown, focusing on the G pole control electricity