HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service Guide

8 Connector pin assignments
1394
Pin Signal
1Power
2 Ground
3 TPB-
4 TPB+
5 TPA-
6 TPA+
Audio-in (microphone)
Pin Signal
1 Audio signal in
2 Audio signal in
3 Ground
182 Chapter 8 Connector pin assignments