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康佳T2110型彩电“三无”,机内发出轻微的有节奏“嘘嘘”声,该现象容易误判为主电源负载过重或保护电路动作。检修时可断开L401,在C327上接入假负载试验,检测B+电压发现其仅为40～50V且不稳定,该故障实际上是由于启动电阻R052阻值变大所致,更换后故障即可排除。长虹C1462型彩电,若出现图像时有时无故障,且检查AGC、AFC电压异常,N101各脚电压多数偏差较大。该现象往往误判为AFT中周失谐、图像中放中周失谐或N101不良,实际上大多是因为CPU第(31)、(32)脚间所接晶振虚焊所
Konka T2110-type TV “three noes”, the machine issued a slight rhythmic “hush” sound, the phenomenon easily misjudged as the main power load or protect the circuit action. L401 can be disconnected during maintenance, access to false load test on C327, detection of B + voltage was found to be only 40 ~ 50V and unstable, the fault is actually due to the start-up resistor R052 resistance caused by the change after the failure that Can be ruled out. Changhong C1462-type TV, if there is no failure of the image sometimes, and check the AGC, AFC voltage anomalies, N101 most of the foot voltage deviation. This phenomenon is often misjudged as AFT in the week detuning, the image put week detuning or N101 bad, in fact, mostly because of CPU (31),