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机型:彩星6821—4P型彩电故障现象:“三无”,指示灯亮检修:开机观察灯丝亮,用万用表测+B电压为110V正常,提高加速极电压时出现光栅和回扫线。说明故障不在行与电源电路。CPU的+5V工作电压正常,但遥控器、手动均失灵,测CPU(CTV222SPRC1.1C)(35)脚接收到遥控器发出的信号,测(41)脚无0V/5V的开/关电压变化,怀疑CPU损坏,更换后亦如此,测(39)、(40)脚电压正常,是否N102
Model: Choi Seung 6821-4P color TV Fault phenomenon: “three no”, the indicator light Repair: boot observation filament light, with a multimeter to measure the voltage of 110V normal B, increase the acceleration voltage when the grating and flyback line. Shows that the fault is not in line with the power circuit. CPU +5 V working voltage is normal, but the remote control, manual are malfunctioning, measuring CPU (CTV222SPRC1.1C) (35) feet to receive the signal from the remote control, measuring (41) feet 0V / 5V on / off voltage change , Suspected CPU damage, so after replacement, measuring (39), (40) pin voltage is normal, whether N102