Supermicro 4020C-T, User Manual

Page: 52 / 102

5-20
A+ Workstation 4020C-T User's Manual
I 2 C to PCI Enable/Disable
The JI 2 C1/2 pair of jumpers allows you
to connect the System Management
Bus to any one of the PCI expansion
slots. The default setting is closed (on)
for both jumpers to enable the connec-
tion. Both connectors must be set the
same (JI 2 C1 is for data and JI 2 C2 is for
the clock). See the table on right for
pin defi nitions.
I 2 C to PCI Enable/Disable
Jumper Settings
(JI 2 C1/2)
Jumper Setting Defi nition
Closed Enabled
Open Disabled
Audio Enable/Disable
Jumper JPAC is used to enable or
disable the audio. Onboard audio is
provided by AC '97 audio CODEC for
high quality 6-channel (5.1) sound. The
default setting is on pins 1-2 to enable
the audio. See the table on right for pin
defi nitions.
Audio Enable/Disable
Jumper Settings (JPAC)
Both Jumpers Defi nition
Pins 1-2 Enabled
Pins 2-3 Disabled
3rd Power Supply Fail Signal
Enable/Disable
The system can notify you in the event
of a power supply failure. This feature
assumes that three redundant power
supply units are installed in the chas-
sis. If you only have one or two power
supplies installed, you should disable
the function with the J3P header to pre-
vent false alarms. See the table on the
right for jumper settings.
3rd Power Supply Fail Signal
Jumper Settings (J3P)
Jumper Setting Defi nition
Open Disabled
Closed Enabled