User`s manual

Chapter 2: Installation
2-27
JPUSB2
Front Panel Audio Control
If supplied with our chassis, attach
the Front Panel audio interface card
to this header. Note that if front panel
headphones are plugged in, the back
panel audio output is disabled. In
addition, if the front panel interface card
is not connected to the front panel audio
header, jumpers should be installed
on the header pin pairs: 1-2, 5-6, and
9-10. If these jumpers are not installed,
the back panel line out connector will
be disabled and microphone input Pin
1 will be left oating, which can lead to
excessive back panel microphone noise
and cross talk. See the table below for
pin denitions.
A. Front Panel Audio
B. PWR LED
Power LED
The Power LED connector is designated
JLED. This connection is used to pro-
vide LED Indication of power supplied to
the system. See the table on the right
for pin denitions.
PWR LED
PinDenitions
Pin# Denition
1 +5V
2 Key
3 Ground
B
A
HighDenitionFronPanel
Audio
Pin# Signal
1 MC_L
2 AUD_GND
3 MC_R
4 FP_Audio-Detect
5 Line_2_R
6 Ground
7 FP_Jack-Detect
8 Key
9 Line_2_L
3 Ground
B
A