HP COMPAQ DC5750 Service & Reference Manual page 145

Serial Interface, Powered and Non-Powered
Connector and Icon
USB
Connector and Icon
Microphone
Connector and Icon (1/8" miniphone)
1 2 3 1 2 3
Headphone
Connector and Icon (1/8" miniphone)
1 2 3
Line-In Audio
Connector and Icon (1/8" miniphone)
1 2 3
Service Reference Guide, dc5750
Pin Signal
1 Carrier Detect (12V if powered)
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Signal Ground
6 Data Set Ready
7 Request to Send
8 Clear to Send
9 Ring Indicator (5V if powered)
Pin Signal
1 +5 VDC
2 - Data
3 + Data
4 Ground
Pin Signal
1 (Tip) Left audio and power
2 (Ring) Right audio and power
3 (Shield) Ground
Pin Signal
1 (Tip) Audio_Left
2 (Ring) Audio_Right
3 (Shield) Ground
Pin Signal
1 (Tip) Audio_In_Left
2 (Ring) Audio_In_Right
3 (Shield) Ground
437963-001
Connector Pin Assignments
A–3