| 故障表现为：三无 检修与分析：拆机检查f801烧断，Q803烧坏，R859烧断。换好试机，测量有380V,无24V输出。后检查为24V振荡电路R849坏，换新试机，发现24V偏低，为22V，后检查发现R870有打火。补焊后试机修复。 |
|Archiver|手机版|家电维修论坛
( 蜀ICP备19011473号-4 川公网安备51102502000164号 )
GMT+8, 2025-7-17 14:05 , Processed in 0.111982 second(s), 17 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.
