Supermicro 7044H-82, User Manual

Page: 51 / 124

Chapter 5: Advanced Serverboard Setup
5-17
5-9 Jumper Settings
Explanation of
Jumpers
To modify the operation of the
serverboard, jumpers can be
u s e d t o c h o o s e b e t w e e n
o p t i o n a l s e t t i n g s . J u m p e r s
create shorts between two pins
to change the function of the
connector. Pin 1 is identified
w i t h a s q u a r e s o l d e r p a d o n
the printed circuit board. See
the serverboard layout pages
for jumper locations.
N o t e : O n t w o p i n j u m p e r s ,
"Closed" means the jumper is on
and "Open" means the jumper is
off the pins.
Connector
Pins
Jumper
Cap
Setting
Pin 1-2 short
3 2 1
3 2 1
CMOS Clear
JBT1 is used to clear CMOS (which will also clear any passwords). In-
stead of pins, this jumper consists of contact pads to prevent accidentally
clearing the contents of CMOS.
On the X6DH8-G2/X6DH8-XG2, the CMOS Clear contact pads are located
between the floppy drive header and the South Bridge chip (see Figure 5-
6.
To clear CMOS,
1) First power down the system and unplug the power cord(s)
2) With the power disconnected, short the CMOS pads with a metal object
such as a small screwdriver
3) Remove the screwdriver (or shorting device)
4) Reconnect the power cord(s) and power on the system.
Note: Do not use the PW_ON connector to clear CMOS.