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因某种原因使“行变”短路时,其电感量 L_Y 将变小,根据“行管”最大电流公式 Icp=(Ec)/(Ly)·(Is)/2得知.行电流将增大(据检修经验:54cm/21英寸彩电正常电流为250～400mA 左右;64cm/25英寸为300～650mA、74cm/29英寸为600～900mA),以54cm 彩电为例,行电流增大为800mA 左右,同时+B 电压下跌至60V 左右。此时若有以下特征,如:断开行偏转线圈时,行电流不变或变化不大;手摸“行管”发荡等异常现象,则说明“行变”已短路损坏。请注意:行输出电路的工作电流是彩电屏幕尺寸的大小及行输出电路的负载电路多少来确定。因此,在判断行输出电路出现过流时,要根据屏幕尺寸及行输出电路具体负载情况来确定。
For some reason, “line change” is short-circuited, the inductance L_Y will decrease, and the line current will increase according to the maximum current formula Icp = (Ec) / (Ly) · (Is) / 2 Large (according to maintenance experience: 54cm / 21 inch color TV normal current of 250 ~ 400mA; 64cm / 25 inches for the 300 ~ 650mA, 74cm / 29 inches for the 600 ~ 900mA) to 54cm color TV, for example, the current increases to 800mA Or so, + B voltage dropped to about 60V at the same time. At this time if the following characteristics, such as: breaking the line deflection coil, the line current unchanged or little change; hand touch “governs” the swing and other anomalies, then “change” has been short-circuit damage. Please note: the working current of the output circuit is determined by the size of the color screen and the load circuit of the line output circuit. Therefore, in determining the line output circuit over-current, according to the screen size and line output circuit to determine the specific load conditions.