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9 AIMB-275 User Manual

Chapter 1 General Information

1.8.2 CMOS Clear (CMOS1)

The AIMB-275 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 CMOS1 to 2-3 closed for just a few

seconds, and then move the jumper back to 1-2 closed. This procedure will reset the

CMOS to its default setting.

* Default

1.8.3

Power Switch/HDD LED/SMBUS/Speaker Pin Header (JFP1)

1.8.4 Power LED and Keyboard Lock Pin Header (JFP2)

Table 1.3: CMOS1

Function Jumper Setting

*Keep CMOS data

1 2 3

Clear CMOS data

1 2 3

1-2 closed

2-3 closed

Table 1.4: Power Switch/HDD LED/SMBUS/Speaker Pin Header (JFP1)

Pin Signal Pin Signal

1 +5V 2 HDDLED+

3 Power Button+ 4 NC

5 HDDLED- 6 Power Button-

7 SPK_P3 8 SMB_DATA

9 System Reset+ 10 SPK_P4

11 SMB_CLK 12 System Reset-

Table 1.5: Power LED and Keyboard Lock Pin Header (JFP2)

Pin Signal

1 LED Power

2NC

3GND

4 Keyboard LOCK#

5GND

Advantech AIMB-275 User Manual

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