Superseded82% confidenceCautionTime unknown
手机听筒/外放不通电或时有时无，很可能是主板音频IC或排线虚焊问题，而非喇叭本体损坏，此时更换喇叭无效，需先用替换法测试再决定是否购买配件
1
Sources
82%
Confidence
Long-term
Relevance
-
First Seen
This knowledge claim has been superseded by newer content
手机维修用喇叭必须区分听筒(receiver)和外放扬声器(loudspeaker)，两者尺寸、阻抗和安装位置不同，听筒故障表现为通话对方声音小/无声，外放故障表现为放音乐/免提无声，购买前先自测是哪个环节故障Sources
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