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故障现象:该机电路板折断经多人检修判断显像管损坏,笔者受人委托接机,该机属于长虹 A6机心,CPU 采用 LA864512,小信号处理电路为 LA7668N。该机是没有观看数日的新彩电,打开机壳做加电前检查,发现电路板行输出部分多处折断并用导线相连,据机主讲:一开机就烧电视机尾板上的电阻 R632(33Ω/0.5W),加电试机果然 R632上面冒烟,并且电视机噪声最大,前面板按键及遥控器都不能控制,真吓人,马上关
Symptom: The machine circuit board broken by more than one person to judge the destruction of the picture tube damage, the author entrusted by the pick-up, the machine belongs to Changhong A6 movement, CPU uses LA864512, small signal processing circuit LA7668N. The machine is not watching a few days of the new color TV, open the case to do before the power check and found that some of the circuit board output section broken and connected with wire, according to the speaker: a boot on the TV tail board resistor R632 ( 33Ω / 0.5W), power test machine Surely smoke above the R632, and the largest TV noise, the front panel buttons and remote control can not control, really scary, immediately off