Audio-In (Microphone); Audio-Out (Headphone) - HP EliteBook 2730p Maintenance And Service Manual

Connector pin assignments

Audio-in (microphone)

Pin
1
2
3

Audio-out (headphone)

Pin
1
2
3
9–2
Signal
Audio signal in
Audio signal in
Ground
Signal
Audio out, left channel
Audio out, right channel
Ground
Maintenance and Service Guide