Acer AL1911 - Page 29

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6.2.3 J2 TO Speaker
Pin No Signal Comment
Pin 1 +5V VDD for audio volume adjustment
Pin 2 VR Audio volume adjustment
Pin 3 L+ Speaker out L+
Pin 4 L- Speaker out L-
Pin 5 Mute Audio mute control
Pin 6 HP-S EAR phone output control
Pin 7 HP-L EAR phone out L
Pin 8 HP-R EAR phone out R
Pin 9 GND GND
Pin 10 R+ Speaker out R+
Pin 11 R- Speaker out R-
6.2.3 J3 FOR Audio input
Pin No Signal Comment
Pin 1 GND GND
Pin 2 Audio IN (1) From Audio output (1)
Pin 3 Audio IN (2) From Audio output (2)