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电路组成:CPU为LK5140M247C834N—R191,存储器为X24022P(图标24C02),小信号单片集成电路为LA7685J。遥控器:型号为TCL RC—061R,芯片为9012—011。故障现象:修好电源故障后开机就呈现AV状态,输入AV信号正常。转入TV状态,左上角出现奇怪字符如图1所示。按频道键白色字符的S有时变为M,字
Circuit: CPU is LK5140M247C834N-R191, memory is X24022P (icon 24C02), small signal monolithic integrated circuit LA7685J. Remote Control: Model TCL RC-061R, the chip is 9012-011. Symptoms: repair the power failure appears on the boot AV state, the normal input AV signal. Into the TV state, there are strange characters in the upper left corner shown in Figure 1. Press the channel key white characters S sometimes become M, word