经检测。比较器(U2B)V-(6)脚反相输入端对地电压+3.8V,正常;u2Bv+(7)脚同相输入端对地电压+3.8V,偏低(正常为+4V)。若(6)脚与(7)脚电压相近,均会导致 |
|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, 2025-5-18 00:39 , Processed in 0.119928 second(s), 18 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.