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1.故障现象:接通市电,待命电源红色LED指示灯一闪即灭,不能开机。检修:电源开关失效、损坏。用新元件更换时应注意几何安装尺寸应一致。2.故障现象:荧屏光栅上半部有回扫线。检修:微调主电路板上的可变电阻V901(标称值102)直到回扫线消失为止。3.故障现象:开机时有声、无光,几
1. Symptom: Connected to electricity, standby power LED red light flash off, can not boot. Overhaul: power switch failure, damage. Replacement with new components should pay attention to geometric installation size should be consistent. 2. Symptom: the upper part of the screen grating flyback line. Service: Trim the V901 (nominally 102) variable resistor on the main board until the flyback disappears. 3. Symptom: boot sound, matt, a few