원문 게시자: oldturkey03 ,
jonathangavin, the common assignment for the TRRS connector are Tip - left audio Ring 1 (closest to tip) - right audio Ring 2 - ground Sleeve – microphone Now there are two standards that are being used for the TRRS connector CTIA and OMTB, the only difference is the that ground and mic are reversed. So you may have to experiment a bit. To check which wire belongs to what speaker, use a 9v battery and connect the copper to ground (-) (you can also assume the white is ground as well)and briefly touch the other wire to the positive contact. You should here your speaker "pop" that will identify which side it is. Once you identify the speakers, you know that the rest is microphone.