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故障现象:开机后电源指示灯亮,但整机呈现无光栅、无伴音、无图像。出现此类故障时,首先打开机壳,开机观察,若继电器RLY8001、RLY8002无吸合声,则检查Q8004~Q8005、Q8008~Q8009、Q8013等相关元器件是否有问题。实际维修中,因Q8009(KTN2907A)损坏而引起此类故障较常见。KTN2907A技术参数,如图1所示。
Symptoms: power indicator light after powering on, but the whole machine showed no grating, no sound, no image. When such a fault occurs, first open the case, start the observation, if the relay RLY8001, RLY8002 no suction sound, then check Q8004 ~ Q8005, Q8008 ~ Q8009, Q8013 and other related components for any problems. Actual maintenance, due to Q8009 (KTN2907A) damage caused such failures are more common. KTN2907A technical parameters, shown in Figure 1.