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长虹C—2151/2151A型机是A3机芯普及型机.机内+130V供电电路没有过压、过流保护。一旦行输出变压器局部短路造成行过流,将使行输出管、开关管同时损坏.甚至在过压时伤及显像管。为了避免上述故障的发生,可在+130V端加入过压保护二极管或可控硅过压保护电路。由于本机电源脉宽控制环路增益较
Changhong C-2151 / 2151A type machine is A3 universal machine movement. Machine + 130V power supply circuit without over-voltage, over-current protection. Once the line output transformer partial short circuit caused by line flow, will make the line output tube, switch tube damage at the same time, even overvoltage injury CRT. In order to avoid the occurrence of the above-mentioned faults, an overvoltage protection diode or a triac overvoltage protection circuit can be added to the + 130V side. Due to the local power pulse width control loop gain more