HP TC4400 - Manual (Page 204)

D–2 Maintenance and Service Guide
Connector Pin Assignments
Table D-2
Audio-In (Microphone)
Pin Signal Pin Signal
1 Audio signal in 3 Ground
2 Audio signal in
Table D-3
Universal Serial Bus
Pin Signal Pin Signal
1 +5 VDC 3 Data +
2 Data – 4 Ground