测量阴极电压在正常范围,但加速极电压仅50V左右。借鉴本例检修经验,直接检查ABL电路,发现连接行输出变压器(4)脚的R233(1.5kΩ 1/2W)电阻值近似为无穷大。将其更换后,故障机修到这里,终于修好值得探讨。。 |
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