| 插入耳机孔听有正常伴音。初步判定【故障】在N503与扬声器之间，用万用表R~I挡测xsl排插靠电池连接点一边的①、②、③脚时，扬声嚣有相应的声音。测N503②脚无8.7vdianyuan电源电压，顺线路查找发现VD504开关管已经明显烧裂。代换后通电试机一切正常。 |
|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, 2025-6-12 21:53 , Processed in 0.123461 second(s), 18 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.
