故障现象:上部逐渐被拉长,下部逐渐压缩,场幅稍微不满幅。分析与检修:场扫描电路比较简单,但经常出一些较“软”的故障,检修起来相当棘手。如果能细分析归纳总结,很多故障都是有规律的,提出与同行们切磋还是十分有益的。在检修场扫描电路时,重点要搞清电路的基本结构和工作原理,关键要抓住其核心问题,测 Symptoms: the upper part of the gradually stretched, the lower part of the gradual compression, the field a little unhappy. Analysis and Overhaul: The field-scan circuit is relatively simple, but often out of some more “soft” fault repair is quite tricky. If we can sum up the summary analysis, many failures are regular, it is very helpful to propose and colleagues. Scanning circuit in the overhaul field, the key to clear the basic circuit structure and working principle, the key to seize its core issues, measuring