满江红 发表于 2021-3-2 19:23
若加速极与灯丝电压正常,逐个短路 红绿蓝视放管C极到地,看三基色亮度是否足够,如依然黯淡,那就是显像 ...
手机版|家电维修技术论坛 ( 鄂ICP备09003585号-2 )
GMT+8, 2024-11-21 18:38 , Processed in 0.382092 second(s), 8 queries , Gzip On, MemCache On.
Powered by Discuz! X3.4
Copyright © 2001-2020, Tencent Cloud.