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一、D7698损坏引起行电流大接修一台赣新KG—5401“三无”彩电,测得115V电压只有55V,12V电压只有4.5V,行电流达1.2A,更换行偏转线圈和行输出变压器等,故障依旧,后怀疑是N_(501)(D7698CP)内的行扫描电路性能变坏,使行频偏低,行电流增大,导致115V和12V电压均偏低,更换之,故障排除。二、飞跃彩电光电耦合器失效的简捷判别飞跃44C3Y3—1彩电,若出现按遥控器上的等待键时,不能进行直流开关,电源指示灯成橙色故障,测
First, the D7698 damage caused by the current line Daxian repair a new Jiangxi KG-5401 “three without” color TV, measured 115V voltage only 55V, 12V voltage only 4.5V, the line current of 1.2A, the line deflection coil and line output transformer , The fault remains the same, then suspected N_ (501) (D7698CP) within the line scan circuit performance deteriorates, the line frequency is low, the line current increases, resulting in 115V and 12V voltage are low, replacement, troubleshooting. Second, leap color TV optocoupler simple and effective failure leap 44C3Y3-1 color TV, if there is a waiting button on the remote control, can not be DC switch, power indicator into orange fault, test