Advantech AIMB-740-B User manual

AIMB-740-B/741-B
Socket 478 Intel® Pentium®
4/ Celeron-D/ Celeron® pro-
cessor-based Industrial ATX
Motherboard
User’s Manual

AIMB-740-B/741-B User’s Manual ii
Copyright Notice
This document is copyrighted, 2005, by Advantech Co., Ltd. All rights
are reserved. Advantech Co., Ltd. reserves the right to make improve-
ments to the products described in this manual at any time without notice.
No part of this manual may be reproduced, copied, translated or transmit-
ted in any form or by any means without the prior written permission of
Advantech Co., Ltd. Information provided in this manual is intended to
be accurate and reliable. However, Advantech Co., Ltd. assumes no
responsibility for its use, nor for any infringements upon the rights of
third parties which may result from its use.
Acknowledgements
• AWARD is a trademark of Phoenix Technologies Ltd.
• IBM and PC are trademarks of International Business Machines Corpo-
ration.
• Intel®, Pentium® 4, and Celeron® are trademarks of Intel Corporation.
• WinBond is a trademark of Winbond Corporation.
All other product names or trademarks are the properties of their respec-
tive owners.
Part No. 2002074030 1st. Edition
Printed in Taiwan April 2005

iii
1.0.1 A Message to the Customer
Advantech customer services
Each and every Advantech product is built to the most exacting specifica-
tions to ensure reliable performance in the harsh and demanding condi-
tions typical of industrial environments. Whether your new Advantech
equipment is destined for the laboratory or the factory floor, you can be
assured that your product will provide the reliability and ease of operation
for which the name Advantech has come to be known.
Your satisfaction is our primary concern. Here is a guide to Advantech’s
customer services. To ensure you get the full benefit of our services,
please follow the instructions below carefully.
Technical support
We want you to get the maximum performance from your products. So if
you run into technical difficulties, we are here to help. For the most fre-
quently asked questions, you can easily find answers in your product doc-
umentation. These answers are normally a lot more detailed than the ones
we can give over the phone.
So please consult this manual first. If you still cannot find the answer,
gather all the information or questions that apply to your problem, and
with the product close at hand, call your dealer. Our dealers are well
trained and ready to give you the support you need to get the most from
your Advantech products. In fact, most problems reported are minor and
are able to be easily solved over the phone.
In addition, free technical support is available from Advantech engineers
every business day. We are always ready to give advice on application
requirements or specific information on the installation and operation of
any of our products.
FCC: This device complies with the requirements in part
15 of the FCC rule.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received,
including interference that may cause undesired operation.
CAUTION!! Danger of explosion if battery is incorrectly
replaced. The battery doesn£t need to be
charged. Replace only with Advantech-specified
batteries.

AIMB-740-B/741-B User’s Manual iv
Table 1: AIMB-740-B/741-B series comparison table
Model AIMB-
740VE-00B1
AIMB- 740E2-00B1
AIMB- 740VG-00B1
AIMB- 741E-00B1
AIMB- 741E2-00B1
AIMB- 741G-00B1
CPU: Single socket 478 Intel® Pentium® 4/ Cel- eron
Yes Yes Yes Yes Yes Yes
Chipset 845GV 845GV 845GV 845E 845E 845E DDR SDRAM ECC sup- port
No No No Yes Yes Yes
Memory DDR200/
266/333
DDR200/ 266/333
DDR200/ 266/333
DDR200/ 266
DDR200/266 DDR200/
266
AGP 4X slot No No No Yes Yes Yes VGA: Chipset inte- grated VGA controller
Yes Yes Yes No No No
LAN 1: 10/100Base-T, Intel 82562
Yes Yes No Yes Yes No
LAN 2: 10/100Base- TIntel 82551
No Yes No No Yes No
LAN 1: 10/100/ 1000Base-T Intel 82541
No No Yes No No Yes

v
1.0.2 Product warranty
Advantech warrants to you, the original purchaser, that each of its prod-
ucts will be free from defects in materials and workmanship for two years
from the date of purchase.
This warranty does not apply to any products which have been repaired or
altered by persons other than repair personnel authorized by Advantech,
or which have been subject to misuse, abuse, accident or improper instal-
lation. Advantech assumes no liability under the terms of this warranty as
a consequence of such events.
If an Advantech product is defective, it will be repaired or replaced at no
charge during the warranty period. For out-of-warranty repairs, you will
be billed according to the cost of replacement materials, service time and
freight. Please consult your dealer for more details.
If you think you have a defective product, follow these steps:
Step 1. Collect all the information about the problem encountered. (For
example, type of PC, CPU speed, Advantech products used, other
hardware and software used, etc.) Note anything abnormal and list
any on-screen messages you get when the problem occurs.
Step 2. Call your dealer and describe the problem. Please have your man-
ual, product, and any helpful information readily available.
Step 3. If your product is diagnosed as defective, obtain an RMA (return
material authorization) number from your dealer. This allows us
to process your return more quickly.
Table 1.1: AIMB-741 DDR memory compatibility table
Size Vendor Model Brand Component
256MB Transcend TS32MLD64V4F3 SAMSUNG K4H560838E-TCCC
512MB Apacer 77.10736.554 HYNIX HY5DU56822BT-D43
256MB Transcend TS32MLD64V4F3 SAMSUNG K4H560838E-TCC4
512MB Transcend TS64MLD64V4F SAMSUNG K4H560838D-TCCC

AIMB-740-B/741-B User’s Manual vi
Step 4. Carefully pack the defective product, a fully-completed Repair
and Replacement Order Card and a photocopy proof of purchase
date (such as your sales receipt) in a shippable container. A prod-
uct returned without proof of the purchase date is not eligible for
warranty service.
Step 5. Write the RMA number visibly on the outside of the package and
ship it prepaid to your dealer.
1.0.3 Initial Inspection
Before you begin installing your motherboard, please make sure that the
following materials have been shipped:
• AIMB-740-B/741-B Pentium® 4/Celeron-D/Celeron® processor-
based industrial mother board
• 1 AIMB-740-B/741-B Startup Manual
• 1 CD with driver utility and manual (in PDF format)
• 1 FDD cable P/N: 1700340640
• 2 Ultra ATA 100 HDD cables P/N: 1701400452
• 1 COM port cable kit P/N: 1701090401
• 1 I/O port bracket P/N: 1962015680
• 1 Two USB ports extension kit (optional) P/N: 1700100170
If any of these items are missing or damaged, contact your distributor or
sales representative immediately. We have carefully inspected the AIMB-
740-B/741-B mechanically and electrically before shipment. It should be
free of marks and scratches and in perfect working order upon receipt.
As you unpack the AIMB-740-B/741-B, check it for signs of shipping
damage. (For example, damaged box, scratches, dents, etc.) If it is dam-
aged or it fails to meet the specifications, notify our service department or
your local sales representative immediately. Also notify the carrier.
Retain the shipping carton and packing material for inspection by the car-
rier. After inspection, we will make arrangements to repair or replace the
unit.
1.0.4 Release Note
Date Revision Change
April 2005 1st. Ed Initial Release

vii
Contents
Chapter 1 Hardware Configuration .................................2
1.1 Introduction ....................................................................... 2
1.2 Features ............................................................................. 3
1.3 Specifications .................................................................... 3
1.4 Jumpers and Connectors.................................................... 5
Table 1.1:Jumpers........................................................... 5
Table 1.2:Connectors ...................................................... 6
1.5 Board Layout: Jumper and Connector Locations.............. 8
Figure 1.1:AIMB-740-B Jumpers and Connectors......... 8
Figure 1.2:AIMB-741-B Jumpers and Connectors......... 8
Figure 1.3:I/O Connectors .............................................. 9
1.6 AIMB-740-B Block Diagram........................................... 9
Figure 1.4: AIMB-740-B Block Diagram....................... 9
1.7 AIMB-741 Block Diagram.............................................. 10
Figure 1.5: AIMB-741-B Block Diagram..................... 10
1.8 Safety Precautions .......................................................... 11
1.9 Jumper Settings ............................................................... 12
Table 1.3:CMOS (J1).................................................... 12
Table 1.4:Watchdog timer output (J2).......................... 13
Table 1.5:Riser card selection (J3 & J4, only for AIMB-
740-B)13
1.10 System Memory .............................................................. 14
Table 1.6:DIMM module allocation table .................... 14
Table 1.7:DIMM mem capacity sample calculation..... 14
1.11 Memory Installation Procedures ..................................... 14
1.12 Cache Memory ................................................................ 15
1.13 Processor Installation ...................................................... 15
1.14 PCI Bus Routing Table ................................................... 15
Table 1.8:PCI Bus Routing Table:................................ 15
Table 1.9:1U PCI Riser Card Bus Routing Table......... 16
Table 1.10:2U PCI Riser Card Bus Routing Table....... 16
Chapter 2 Connecting Peripherals .................................18
2.1 Introduction ..................................................................... 18
2.2 Primary and Secondary (CN1/2) IDE Connectors .......... 18
2.3 Floppy Drive Connector (CN3)....................................... 19
2.4 Parallel Port (CN4).......................................................... 19
2.5 USB Ports (CN6)............................................................. 20
2.6 VGA Connector (CN7; for AIMB-740-B only).............. 20
2.7 Serial Ports (COM1 : CN9; COM2 : CN10/CN38 ) ....... 21

AIMB-740-B/741-B User’s Manual viii
2.8 PS/2 Keyboard and Mouse Conn (CN11) ....................... 21
2.9 External Keyboard Connector (CN12)............................ 22
2.10 CPU Fan Connector (CN14) ........................................... 22
2.11 System FAN connector (CN15 and CN37)..................... 22
2.12 Front Panel Connectors (CN16, 17, 18, 19, 21&29)....... 23
2.13 H/W Monitor Alarm (CN22).......................................... 24
2.14 USB and LAN ports (CN31 and CN32).......................... 25
2.15 CF socket (CN44, optional) ............................................ 25
2.16 Line out, Mic in connector (CN55)................................. 26
2.17 Audio input from CD-ROM (CD IN; CN56).................. 26
2.18 Aux Line-In connector (AUX IN; CN57) ....................... 26
2.19 Modem-In connector (MDM IN; CN58) ........................ 27
2.20 Front Panel audio connector (FP AUDIO; CN59) .......... 27
2.21 8-pin Alarm Board Connector (CN62)............................ 27
2.22 Case Open Connector (CN64)......................................... 28
2.23 Connecting to SNMP-1000 remote manager .................. 28
2.24 Auxiliary 4-pin power connector (ATX1) ...................... 28
Chapter 3 Award BIOS Setup.........................................30
3.1 Introduction ..................................................................... 30
3.2 Entering Setup ................................................................. 31
Figure 3.1:Award BIOS Setup initial screen ................ 31
3.3 Standard CMOS Setup .................................................... 31
Figure 3.2:Standard CMOS features screen ................. 31
3.4 Advanced BIOS Features ................................................ 32
Figure 3.3:Advanced BIOS features screen.................. 32
3.5 Advanced Chipset Features............................................. 34
Figure 3.4:Advanced chipset features screen ............... 35
3.6 Integrated Peripherals...................................................... 37
Figure 3.5:Integrated peripherals.................................. 37
3.7 Power Management Setup............................................... 40
Figure 3.6:Power management setup screen (1)........... 40
Figure 3.7:Power management setup screen (2)........... 42
3.8 PnP/PCI Configurations .................................................. 43
Figure 3.8:PnP/PCI configurations screen.................... 43
3.9 PC Health Status.............................................................. 44
Figure 3.9:PC health status screen................................ 44
3.10 Spread Spectrum Control ................................................ 45
Figure 3.10:Spread Spectrum Control screen ............... 45
3.11 Password Setting ............................................................. 45
3.12 Save & Exit Setup ........................................................... 46
3.13 Exit Without Saving ........................................................ 46
Chapter 4 Chipset Software Installation Utility............48

ix
4.1 Before you begin ............................................................. 48
4.2 Introduction ..................................................................... 48
4.3 Windows XP Driver Setup.............................................. 49
Chapter 5 VGA Setup (for AIMB-740-B) ......................54
5.1 Introduction ..................................................................... 54
5.2 Dynamic Video Memory Technology............................. 54
5.3 Windows XP Driver Setup.............................................. 55
Chapter 6 LAN Configuration ........................................62
6.1 Introduction ..................................................................... 62
6.2 Features ........................................................................... 62
6.3 Installation....................................................................... 63
6.4 Win XP Driver Setup (Intel 82541/82562/82551) .......... 63
Chapter 7 USB 2.0 Configuration...................................68
7.1 Introduction ..................................................................... 68
7.2 Features ........................................................................... 68
7.3 Installation....................................................................... 68
Chapter 8 Ultra ATA Storage Driver Setup ..................76
8.1 Introduction ..................................................................... 76
8.2 Features ........................................................................... 76
8.3 Windows XP Driver Setup.............................................. 76
8.4 Displaying Driver Information........................................ 79
Chapter 9 Onboard Security Setup ................................82
9.1 Introduction ..................................................................... 82
9.2 Windows XP Driver Setup.............................................. 82
9.3 Using the OBS Hardware Doctor Utility ........................ 85
Appendix A Programming the watchdog timer...............90
A.1 Programming the Watchdog Timer................................. 90
Appendix B Pin Assignments ..........................................100
B.1 IDE Hard Drive Connector (CN1, CN2)....................... 100
Table B.1:IDE hard drive connector (CN1, CN2)...... 100
B.2 Floppy Drive Connector (CN3)..................................... 101
Table B.2:Floppy drive connector (CN3)................... 101
B.3 Parallel Port Connector (CN4) ...................................... 102
Table B.3:Parallel port connector (CN4).................... 102
B.4 USB Connector (CN6) .................................................. 103
Table B.4:USB1/USB2 connector (CN6)................... 103
B.5 VGA Connector (CN7) ................................................. 103
Table B.5:VGA connector (CN7) ............................... 103
B.6 COM1/COM2 RS-232 Serial Port (CN9, CN10).......... 104
Table B.6:COM1/2 RS-232 serial port (CN9/10)....... 104

AIMB-740-B/741-B User’s Manual x
B.7 Keyboard and Mouse Connector (CN11)...................... 105
Table B.7:Keyboard and mouse connector (CN11).... 105
B.8 External Keyboard Connector (CN12).......................... 105
Table B.8:External keyboard connector (CN12) ........ 105
B.9 CPU/System Fan Power Conn (CN14/15/37)............... 106
Table B.9:CPU/System Fan Power Conn (CN14/15/37)..
106
B.10 Power LED (CN16)....................................................... 106
Table B.10: Power LED and keylock conn (CN16) ... 106
B.11 External Speaker Connector (CN17)............................. 107
Table B.11:External Speaker Connector (CN17) ....... 107
B.12 Reset Connector (CN18) ............................................... 107
Table B.12:Reset connector (CN18)........................... 107
B.13 HDD LED Connector (CN19)....................................... 108
Table B.13:HDD LED connector (CN19) .................. 108
B.14 ATX Soft Power Switch (CN21)) ................................. 108
Table B.14:ATX soft power switch (CN21)............... 108
B.15 H/W Monitor Alarm (CN22)......................................... 109
Table B.15:H/W monitor alarm (CN22)..................... 109
B.16 SM Bus Connector (CN29) ........................................... 109
Table B.16:SM Bus Connector (CN 29)..................... 109
B.17 USB/LAN ports (CN31 and CN32) .............................. 109
Table B.17:USB port .................................................. 109
Table B.18:Ethernet 10/100Base-T RJ-45 port .......... 110
B.18 CF socket (CN44) ......................................................... 110
Table B.19:CF socket (CN44) .................................... 110
B.19 Line Out, Mic IN connector (CN55)............................. 111
B.20 Audio input from CD-ROM (CD IN; CN56)................ 111
Table B.20:Audio in from CD-ROM (CD IN; CN56) 111
B.21 Aux Line-In connector (AUX IN; CN57) ..................... 112
Table B.21:Aux Line-In connector (AUX IN; CN57) 112
B.22 Modem-In connector (MDM IN; CN58) ...................... 112
Table B.22:Modem-In connector (MDM IN; CN58) . 112
B.23 Front Panel audio connector (FP AUDIO; CN59) ........ 113
Table B.23:Front audio conn (FP AUDIO; CN59)..... 113
B.24 8-pin Alarm Board Connector (CN62).......................... 113
Table B.24:8-pin Alarm Board Connector (CN62) .... 113
B.25 Case Open Connector (CN64; only AIMB-741-B)....... 114
Table B.25:Case Open Connector (CN64; only AIMB-
741-B)114
B.26 Front Panel LAN LED Connector (CN65; only AIMB-741-
B)114
Table B.26: Front Panel LAN LED Connector (CN65;
only AIMB-741-B)114

xi
B.27 System I/O Ports............................................................ 114
Table B.27:System I/O ports ...................................... 114
B.28 DMA Channel Assignments.......................................... 115
Table B.28:DMA channel assignments ...................... 115
B.29 Interrupt Assignments ................................................... 116
Table B.29:Interrupt assignments ............................... 116
B.30 1st MB Memory Map.................................................... 116
Table B.30:1st MB memory map ............................... 116
B.31 PCI Bus Map ................................................................. 117
Table B.31:PCI bus map (for V/VE/E2 version; V upon
request)117
Table B.32:PCI bus map (for VG/G2 version; G2 upon
request)117

AIMB-740-B/741-B User’s Manual xii

1
CHAPTER
1
General Information

AIMB-740-B/741-B User’s Manual 2
Chapter 1 Hardware Configuration
1.1 Introduction
Advantech's AIMB-740-B/AIMB-741-B series industrial motherboard is
designed based on the standard ATX form factor with additional indus-
trial features such as long product life, high reliability and manageability.
It is flexible in that it can be installed in a commercial PC chassis or in an
industrial grade rack mounting chassis. It meets the requirements of a
variety of applications where a commercial motherboard cannot fit.
The AIMB-740-B and AIMB-741-B utilize Intel 845GV and 845E,
respectively. They support socket 478 Pentium 4/Celeron-D/Celeron pro-
cessor (FSB 400/533MHz) up to 3.06 GHz. In addition to a high-speed
processor, it supports up to 2GB DDR memory and has 2 DIMM sockets
on board.
The AIMB-740-B comes with the 845GV integrated VGA controller pro-
viding superior display performance, while the AIMB-741-B provides an
AGP 4X slot to support a VGA add-on card. Dual Intel 82551/82562 10/
100Base-T Ethernet controller or single Intel 82541 10/100/1000Base-T
Ethernet controller are available on the AIMB-740-B/741-B series. The
high reliability and excellent performance provided by Intel Ethernet con-
troller are crucial for various network applications. AIMB-740-B/741-B
also offers an exclusive feature of USB2.0 which provides high data
transfer rate up to 480 Mb/sec.
A backup of CMOS data is stored in the Flash memory, which protects
BIOS setup data even after a battery failure. Also included is a 255-level
watchdog timer, which resets the CPU or generates an interrupt if a pro-
gram cannot be executed normally. This enables reliable operation in
unattended environments. The remote management interface enables the
AIMB-740-B/741-B to be managed through Ethernet when it is con-
nected to the SNMP-1000 Remote HTTP/SNMP System Manager.
Note: Some of the features mentioned above are not
available with all models. For more information
about the specifications of a particular model,
see Section 1.3: Specifications.

3
1.2 Features
1. Standard ATX form factor with industrial features: AIMB-740-
B/741-B provides industrial features like long product life, reliable
operation under wide temperature range, watchdog timer, CMOS
backup functions, etc.
2. PCI and ISA bus support: in addition to the 5 PCI slots, AIMB-
740-B/741-B provides 2 ISA slots, allowing existing ISA legacy
devices to be used in modern high performance computing system.
3. Healthy status monitoring and remote management: System
voltage levels, fan speed, CPU temperature are monitored to ensure
stable operation. The remote management interface allows the sys-
tem to be managed through Ethernet when it is connected to the
SNMP-1000 Remote HTTP/SNMP System Manager.
4. BIOS CMOS backup and restore: When BIOS CMOS setup has
been completed, data in the CMOS RAM is automatically backed
up to the Flash ROM. This is particularly useful in harsh environ-
ments which may cause setup data loss such as battery failure.
Upon such an error occurring, BIOS will check the data, and auto-
matically restore the original data for booting.
5. Automatically power on after power failure: It is often required
to have an unattended system come back to operation when power
resumes after a power failure. Advantech's industrial motherboard
allows users to set the system to power on automatically without
pushing the power on button.
1.3 Specifications
1.3.1 System
• CPU: AIMB-740-B/741-B supports Intel Pentium® 4/ /Celeron-D/Cel-
eron up to 3.06 GHz, FSB 400/533 MHz.
• L2 Cache: CPU built-in 128/256/512 KB full-speed L2 cache
• BIOS: Award Flash BIOS (4Mb Flash Memory)
• System Chipset: AIMB-740-B: Intel® 845GV, AIMB-741-B: Intel®
845E

AIMB-740-B/741-B User’s Manual 4
• EIDE hard disk drive interface: Supports up to four IDE hard disk
drives other enhanced IDE devices. Supports PIO mode 4 (16.67 MB/s
data transfer rate) and Ultra ATA 100/66/33 (100/66/33 MB/s data
transfer rate).
• Floppy disk drive interface: Supports up to two floppy disk drives,
5¼" (360 KB and 1.2 MB) and/or 3½" (720 KB, 1.44 MB). BIOS
enabled/disabled
1.3.2 Memory
• RAM: Up to 2GB in two 184-pin DIMM sockets. Supports DDR200/
266 SDRAM (AIMB-740-B supports DDR333).
• ECC: AIMB-740-B: not supported, AIMB-741-B: supported
1.3.3 Input/Output
• PCI Bus: 5 PCI slots, 32-bit, 33MHz. PCI 2.2 compliant
• EISA Bus: 2 slots with PCI-to-ISA controller IT8888
• Enhanced parallel port: Configurable to LPT1, LPT2, LPT3, or dis-
abled. Standard DB-25 female connector provided. Supports EPP/SPP/
ECP
• Serial ports: Two RS-232 ports with 16C550 UARTs (or compatible)
with 16-byte FIFO buffer. Supports speeds up to 115.2 Kbps. Ports can
be individually configured to COM1, COM2 or disabled
• Keyboard and PS/2 mouse connector: Two 6-pin mini-DIN connec-
tor are located on the mounting bracket for easy connection to a key-
board and PS/2 mouse.
• USB port: Supports up to six USB 2.0 and transmission rate up to
480Mbps. (Six USB ports are available in AIMB-740-B/741-B)
1.3.4 VGA interface
• Interface:
• AIMB-740-B: Chipset integrated VGA controller, shared system mem-
ory 8 to 64 MB; AIMB-740-B do not support AGP
• AIMB-741-B: AGP 4X slot, 1.5V only
1.3.5 Ethernet LAN
• Supports single/dual 10/100Base-T networking (or optional single/
dual10/100/1000Base-T Ethernet networking)
• Chipset: Intel® 82562 and 82551 chipset for 10/100Base-T LAN or
single/dual Intel 82541 chipset for GbE LAN

5
1.3.6 Industrial features
• Watchdog timer: Can generate a system reset or IRQ11. The watchdog
timer is programmable, with each unit equal to one second or one
minute (255 levels).
1.3.7 Mechanical and environmental specifications
• Operating temperature: 0° ~ 60° C (32° ~ 140° F, depending on CPU)
• Storage temperature: -20° ~ 70° C (-4° ~ 158° F)
• Humidity: 20 ~ 95% non-condensing
• Power supply voltage: +5 V, ±12 V
• Power consumption: Typical : +3.3V:4.23A, +5V:1.35A , +12V:4.17A
(Intel® Pentium® 4 2.4GHz, 512MB DDR 333)
• Board size: 304.8 x 228.6 mm (12" x 9")
• Board weight: 0.7 kg (1.68 lb)
1.4 Jumpers and Connectors
Connectors on the AIMB-740-B/741-B motherboard link it to external
devices such as hard disk drives and a keyboard. In addition, the board
has a number of jumpers used to configure your system for your applica-
tion.
The tables below list the function of each of the board jumpers and con-
nectors. Later sections in this chapter give instructions on setting jump-
ers. Chapter 2 gives instructions for connecting external devices to your
motherboard.
Table 1.1: Jumpers
Label Function
J1 CMOS Clear
J2 Watchdog timer output selection
J3 Riser Card Selection 1 (only for AIMB-740-
B)
J4 Riser Card Selection 2 (only for AIMB-740-
B)

AIMB-740-B/741-B User’s Manual 6
Table 1.2: Connectors
Label Function
CN1 Primary IDE connector
CN2 Secondary IDE connector
CN3 Floppy drive connector
CN4 Parallel port
CN6 USB port 4, 5
CN7 VGA connector (only for AIMB-740-B)
CN9 Serial port: COM1
CN10 Serial port connector: COM2
CN11 PS/2 keyboard and mouse connector
CN12 External keyboard connector
CN14 CPU FAN connector
CN15 System FAN connector 1
CN16 Power LED and Keyboard Lock
CN17 External speaker
CN18 Reset connector
CN19 HDD LED connector
CN21 ATX soft power switch (PS_ON)
CN22 HW Monitor Alarm
Close: Enable OBS Alarm
Open: Disable OBS Alarm
CN29 SM BUS Connector
PIN1: SMB_DATA
PIN2: SMB_CLOCK
CN31 USB port 0, 1 & LAN1
CN32 USB port 2, 3 & LAN2
CN37 System FAN connector 2
CN38 Serial port: COM2 (only for AIMB-741)
CN44 CF socket (optional)
CN55 Line Out, Mic IN connector
CN56 CD IN (Audio input from CD-ROM)
CN57 AUX IN connector

7
CN58 MDM IN connector
CN59 FP AUDIO connector
CN62 8-pin Alarm Board connector
CN64 Case Open connector (only for AIMB-
741-B)
CN65 Front Panel LAN LED connector (only
for AIMB-741-B)
ATX1 ATX 12V Auxiliary power connector
ATX2 ATX power connector
Table 1.2: Connectors

AIMB-740-B/741-B User’s Manual 8
1.5 Board Layout: Jumper and Connector Locations
Figure 1.1: AIMB-740-B Jumpers and Connectors
Figure 1.2: AIMB-741-B Jumpers and Connectors
CN15
CN12
CN10
CN6
CN16
CN17 CN19 CN21 CN18
CN29 CN22 J2
CN13
CN37
J3
J4
CN56
CN57
CN58
PCI1
PCI2
PCI3
PCI4
PCI5
ISA1ISA2
CN61
J1
CN32 CN31
CN55
CN59
ATX1
CN7 CN9
CN4
CN11
CPU
CN14
DIMM1
DI MM2
CN62
ATX2
CN2
CN1
CN3
CN44
CN32 CN31
CN55
CN59
ATX1
CN38 CN9
CN4
CN11
CPU
CN14
DI MM1
DI MM2
CN62
ATX2
CN2
CN1
CN3
CN44
CN15
CN12
CN10
CN6
CN16
CN17 CN19 CN21 CN18
CN29 CN22 J2
CN13
CN37
J3
J4
CN56
CN57CN58
PCI1
PCI2
PCI3
PCI4
PCI5
ISA1ISA2
CN61
J1
AGP1
CN65
CN64