| 用耳机作监听器来判断【故障】范围。首先插入耳机孔，无伴音。再插入音频输出孔仍无声音。可初步断定【故障】范围在。N509到N501之间。测N501④与⑨脚供电端均正常，N417⑥脚无5V电压。顺线路查找发现L413已经开路（原zuzhi阻值为4.7Ω）。将其换新后【故障】排除。 |
|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 22:00 , Processed in 0.118471 second(s), 18 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.
