论文部分内容阅读
2.屏幕上有亮点但无基线,即调节扫描开关及稳定度均不出现基线。故障原因大致归纳为四个方面,即扫描电路电源不正常、扫描电路故障、时基发生器电路故障、X轴放大器故障。维修方法 (1)、扫描电路电源不正常:先用500型三用表测量扫描板上+350V、+150V、-150V三个直流稳压电源,一般情况下,当+350V电压低于+220V时,多谐振荡器就不能正常工作,无扫描基线,应找出电源故障原
2. There are bright spots on the screen but no baseline, that is, adjust the scan switch and stability are not the baseline. Failure causes can be summarized into four aspects, namely, scanning circuit power is not normal, the scanning circuit failure, time-base generator circuit failure, X-axis amplifier failure. Maintenance methods (1), the scan circuit power is not normal: first with the 500-type three-meter table to measure the scanning board + 350V, + 150V, -150V three DC power supply, under normal circumstances, when the + 350V voltage is lower than +220 V , Multivibrator can not work normally, no scan baseline, should identify the original power failure