PTT/RXD SPI3 9 AE0NC 10 A:Greenspeakerwiresolderingposition. B:Brownspeakerwiresolderingposition. 11 Componentside Layer1 Layer2 Layer312 Layer4 Foilside 13 33 14 ABCDEFGHIJ 1TK-3307PCBOARD/PC板 2TX-RXUNIT(X57-758X-XX)0-20:M,X0-21:M2,C0-22:X20-23:C23-01:C6 Foilsideview(J79-01...