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1.8
Jumper Settings
This section provides instructions on how to configure your motherboard by setting
the jumpers. It also includes the motherboards's default settings and your options for
each jumper.
1.8.1
How to Set Jumpers
You can configure your motherboard to match the needs of your application by set-
ting the jumpers. A jumper is a metal bridge that closes an electrical circuit. It consists
of two metal pins and a small metal clip (often protected by a plastic cover) that slides
over the pins to connect them. To "close" (or turn ON) a jumper, you connect the pins
with the clip. To "open" (or turn OFF) a jumper, you remove the clip. Sometimes a
jumper consists of a set of three pins, labeled 1, 2, and 3. In this case you connect
either pins 1 and 2, or 2 and 3. A pair of needle-nose pliers may be useful when set-
ting jumpers.
1.8.2
CMOS Clear (CMOS1)
The AIMB-285 motherboard contains a jumper that can erase CMOS data and reset
the system BIOS information. Normally this jumper should be set with pins 1-2
closed. If you want to reset the CMOS data, set J1 to 2-3 closed for just a few sec-
onds, and then move the jumper back to 1-2 closed. This procedure will reset the
CMOS to its default setting.
Table 1.3: CMOS1
Function
*Keep CMOS data
Clear CMOS data
* Default
1.8.3
Power Switch/HDD LED/SMBUS/Speaker Pin Header (JFP1)
Table 1.4: Power Switch/HDD LED/SMBUS/Speaker Pin Header(JFP1)
Pin
Signal
1
+5V
3
Power Button+
5
HDDLED-
7
SPK_P3
9
System Reset+
11
SMB_CLK
Jumper Setting
1-2 closed
2-3 closed
Pin
2
4
6
8
10
12
7
Signal
HDDLED+
NC
Power Button-
SMB_DATA
SPK_P4
System Reset-
AIMB-285 User Manual
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