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Chapter 5
63
Jumper Setting
The section explains how to set jumper for correct configuration of the mainboard.
Setting Jumper
Use the motherboard jumpers to set system configuration options. Jumpers with more Than one pin are
numbered. When setting the jumpers, ensure that the jumper caps are Placed on the correct pins.
Internal header pin definition
Jumper
Type
Description
Setting (default)
Picture
CLR_CMOS
3-pin
CLEAR CMOS
1-2: NORMAL
2-3: CLEAR
Before clearing the CMOS, make sure
to turn the system off.
Header Name
Function
Definition
CPU FAN HEADER
1: GND
2: +12V
3: SENSE
SYS FAN HEADER
(3pin & 4 pin colay
default:3 pin)
1: GND
2: +12V
3: SENSE
4: PWM CONTROL(4 pin
Fan)
FRONT PANEL HEADER
1:
2: ACPI_LED
3: SATALED-
4: PWR_LED
5: GND
6: PWR_SW
7: RESET
8: GND
9: NC
10: Key
11: NC
12: VCC
13: NC
14: -ACTIVE_C
Summary of Contents for Aspire M3900
Page 1: ...Acer Aspire M3900 Service Guide PRINTED IN TAIWAN ...
Page 13: ...Chapter 1 5 Block Diagram ...
Page 42: ...34 Chapter 3 Removing the TV Card 1 Gently pull the TV card to remove it from the mainboard ...
Page 50: ...42 Chapter 3 3 Pull the bezel away from the chassis ...
Page 57: ...Chapter 3 49 3 Lift the power supply module out of the chassis ...
Page 59: ...Chapter 3 51 4 Pull the card reader out of chassis ...
Page 69: ...Chapter 5 61 M B Placement Jumper and Connector Information Chapter 5 ...
Page 75: ...Chapter 5 67 ATX12V CONN 1 GND 2 GND 3 12V_4P 4 12V_4P Connector Name Function Definition ...