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Chapter 4: Motherboard Connections
4.4 Jumpers
Explanation of Jumpers
To modify the operation of the motherboard, jumpers are used
to choose between optional settings. Jumpers create shorts
between two pins to change the function associated with it. Pin 1
is identified with a square solder pad on the printed circuit board.
See the motherboard layout page for jumper locations.
Note:
On a two-pin jumper, "Closed" means the jumper is on
both pins and "Open" indicates the jumper is either on only one
pin or has been completely removed.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
CMOS Clear
JBT1 is used to clear CMOS, which will also clear any passwords. Instead of pins, this jumper
consists of contact pads to prevent accidentally clearing the contents of CMOS.
To Clear CMOS
1. First power down the system and unplug the power cord(s).
2. Remove the cover of the chassis to access the motherboard and remove the battery
from the motherboard.
3.
Short the CMOS pads, JBT1, with a metal object such as a small screwdriver for at
least four seconds.
4. Remove the screwdriver (or shorting device).
5. Re-install the battery.
6. Replace the cover, reconnect the power cord(s), and power on the system.
Notes
: Clearing CMOS will also clear all passwords. Do not use the PW_ON connec-
tor to clear CMOS.
C
MAC CODE
BIOS
LICENSE
BMC CODE
JS
3
JS1
BMC
BMC
Firmware
BIOS
JM2_1
JF1
LAN1
LAN2
FAN3
FAN4
JUSBRJ45
JNCSI
JUIDB1
FANB FANA
FAN6
FAN2FAN1
JPI2C1
LE4
LE6
JRK1
(Front) VGA
JBT1
JSTBY1
JPME1
JIPMB1
JNVI2C
JPWR4
JPWR2
S-SGPIO
SATA5 SATA6
JPWR3
JLAN2
JLAN1
UID LED
JS2
M.2 Slot
TPM/Port80
PCH
LED
PWR
BMC Heartbeat LED
BMC_LAN/USB7/8(3.0)
P1_NVME2/3
P1_NVME0/1
I-S
AT
A0~
3
I-S
AT
A4~7
USB6(3.0)
USB4/5(3.0)
USB2/3
(3.0)
USB0/1
(2.0)
S-SATA4S-SATA5
S-S
AT
A0~3
VGA
COM2
COM1
CMOS CLEAR
UID/BMC
P1-DIMMG1
P1-DIMMF1 P1-DIMME1 P1-DIMMH1
P2-DIMMG1
P2-DIMME1 P2-DIMMF1
P2-DIMMH1
CPU2
CPU1
CPU1 SLOT1 PCIe 4.0 X8 CPU1 SLOT2 PCIe 4.0 X16
CPU1 SLOT3 PCIe 4.0 X16
CPU2 SLOT4 PCIe 4.0 X16
CPU2 SLOT5 PCIe 4.0 X16
CPU2 SLOT6 PCIe
4.0 X8
P1-DIMMB1
P1-DIMMA1
P1-DIMMD1
P1-DIMMC1
P2-DIMMC1
P2-DIMMD1
P2-DIMMB1
P2-DIMMA1
LE3
JL1
BAR CODE
VROC
JVGA
JFP2
LAN CTRL2
JTPM-1
RAID KEY-1
Front Panel CTRL
P2-DIMMB2
P1-DIMMB2
CPLD
FAN5
REV:1.00
X12DPi-N(T)6
LAN CTRL1
(*X12DPI-N6)
X12DPI-NT6
BT1
Battery
Reset
MH15
MH16
NVME
JPL1
LEDM1
1
1. JBT1
