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上门检修彩电,由于条件限制而摘板回店修理也是一种常事。近日一位同行摘板修机又遇到困难。把摘板拿来我处求我帮修。一台长虹 C2591型(TDA8361机心)彩电,开机时为黑屏,但有声,关机时闪亮一下,打开后盖通电试机,灯丝亮度正常,测三个阴极电压得知,三个管均截止,调高加速极电压出现水平一条亮线。这显然是场块损坏故障,因没有带 TDA3654块,故摘板回店换上场输
Home repair TV, due to conditions and pick the board back to shop repair is also a commonplace. Recently, a colleague has trouble repairing machines. I picked the pick plate and asked me to help repair. A Changhong C2591 (TDA8361 movement) color TV, when the boot is black, but the sound, when the shine off, open the back cover power test machine, the filament brightness is normal, measured three cathode voltage that the three tubes are deadline , Increase the acceleration voltage appears a bright line. This is obviously a field block failure, because there is no TDA3654 block, so pick the board back to the store for market lose