HP PL Class 450/500/550/600/650/700/750 User Manual page 106

Audio Front Panel
Connector
Technical Information
System Connectors and Switches
The Audio Front Panel Connector, labeled "Audio Front Panel," is a
10-pin connector that links the system board with the multimedia Front
Panel. This connector directs stereo output to either the front panel
headphone jack or the rear panel stereo jack, as follows:
• When the headphone jack on the Audio Front Panel of the
Workstation is not being used, the audio signal is available on the
rear panel and the internal speakers are active.
• When external speakers are plugged into the rear jack, the audio
signal is directed to the rear jack and the internal speakers are
muted.
• When a headphone is plugged into the headphone jack, the audio
signal is directed to the headphone jack, no sound is available on the
rear panel and the internal speakers are muted.
The Audio Front Panel Connector has the following pin assignments:
Pin
1
2
3
4
5
6
7
8
9
10
90
Signal I/O
Analog Ground
Key Way
Front Panel input IN
left
Front Panel return OUT
left
Front Panel input IN
right
Front Panel return OUT
right
Reserved
Reserved
Reserved
Reserved
Chapter 4