开机观察图象非常模糊，而且调对比度，图象无变化，从现象看，故障应该在ＡＢＬ电路，测量Ｎ２０１（ＬＡ７６８１０）供电正常，＃１３为不正常的３Ｖ，检修外围电路，发现电阻Ｒ２５１（１５Ｋ）开路，更换后故障排除．出处! |
|小黑屋|最新贴|维修网
( 粤ICP备09047344号 ) 
GMT+8, 2025-5-10 16:19 , Processed in 0.527337 second(s), 22 queries .
Powered by Discuz! X3.4
Copyright © 2001-2021, Tencent Cloud.
