Advantech AIMB-233 User manual

User Manual
AIMB-233
Intel® Core™ 8th Gen ULT
Mini-ITX with Type C Alt./HDMI/
LVDS(eDP), 6 COM, Dual LAN,
miniPCIe,
M.2, PCIex1, DDR4, DC Input

AIMB-233 User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2018
by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right
to make improvements in the products described in this manual at any time without
notice.
No part of this manual may be reproduced, copied, translated or transmitted 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
of the rights of third parties, which may result from its use.
Acknowledgements
AMI is a trademark of Phoenix Technologies Ltd.
IBM and PC are trademarks of International Business Machines Corporation.
Intel® Core™ i7/i5/i3 Celeron® is trademark of Intel Corporation
WinBond is a trademark of Winbond Corporation.
All other product names or trademarks are properties of their respective owners.
Part No. 2006023300
Printed in China
Edition 1
April 2020

iii AIMB-233 User Manual
A Message to the Customer
Advantech Customer Services
Each and every Advantech product is built to the most exacting specifications to
ensure reliable performance in the harsh and demanding conditions typical of indus-
trial environments. Whether your new Advantech equipment is destined for the labo-
ratory 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 instruc-
tions 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 frequently asked questions,
you can easily find answers in your product documentation. These answers are nor-
mally 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 busi-
ness day. We are always ready to give advice on application requirements or specific
information on the installation and operation of any of our products.

AIMB-233 User Manual iv
Declaration of Conformity
FCC Class B
This device complies with the requirements in part 15 of the FCC rules:
Operation is subject to the following two conditions:
This device may not cause harmful interference
This device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B dig-
ital device, pursuant to Part 15 of the FCC Rules. These limits are designed to pro-
vide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Opera-
tion of this device in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his/her own expense. The
user is advised that any equipment changes or modifications not expressly approved
by the party responsible for compliance would void the compliance to FCC regula-
tions and therefore, the user's authority to operate the equipment.
Caution! There is a danger of a new battery exploding if it is incorrectly installed.
Do not attempt to recharge, force open, or heat the battery. Replace the
battery only with the same or equivalent type recommended by the man-
ufacturer. Discard used batteries according to the manufacturer's
instructions.

vAIMB-233 User Manual
Memory Compatibility
Ordering Information
Test Item Description
Result Remark
Brand Size Speed Type ECC Vendor PN Memory Advantech
PN
Advantech 16
GB 2666 DDR4 N
AQD-
SD4U16N2
6-SE
SEC 813
K4A8G08
5WB BCTD
AQD-
SD4U16N2
6-SE
PASS
Advantech 4
GB 2666 DDR4 N SEC 807
K4A4G08 PASS
Advantech 4
GB 2400 DDR4 N PASS
Advantech 8
GB 2133 DDR4 N
AQD-
SD4U8GN2
1-SG
SEC 552
BCPB
K4A4G085
WD
AQD-
SD4U8GN
21-SG
PASS
Advantech 16
GB 2400 DDR4 N PASS
Advantech 16
GB 3200 DDR4 N 96SD4-16G
3200NN-MI
9CJ45
D9WSM
PASS
Order Number CPU Display GbE TPM Storage USB PCIe/PCI
AIMB-233G2-U7A1E i7-8665UE
HDMI,
Type C Alt,
LVDS/eDP
(optional)
2Yes
(optional)
2 x
SATA III
1 x mSATA
4 x USB 3.1,
1 x
Full-size
Mini-PCIe
AIMB-233G2-U5A1E i5-8365UE
AIMB-233G2-U3A1E i3-8145UE
2 x USB 3.0,
AIMB-233G2-U0A1E Celeron
4305UE
2 x USB 2.0, 1 x
PCIex1
SQR-
SD4N4G2K
6SNEEB
SQR-
SD4N4G2K
6SNEEB 5WE BCTD
4SNEEB
SD4N4G2K
SQR- SQR-
SD4N4G2K
4SNEEB
SEC 807
K4A4G08
5WE BCRC
AQD-
SD4U16N2
4-HE
H5AN8G8N
AFRUHC
AQD-
SD4U16N2
4-HE
3200NN-MI
96SD4-16G

AIMB-233 User Manual vi
Product Warranty (2 years)
Advantech warrants to you, the original purchaser, that each of its products will be
free from defects in materials and workmanship for two years from the date of pur-
chase.
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 installation. Advantech assumes no
liability under the terms of this warranty as a consequence of such events.
Because of Advantech’s high quality-control standards and rigorous testing, most of
our customers never need to use our repair service. If an Advantech product is defec-
tive, 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:
1. Collect all the information about the problem encountered. (For example, CPU
speed, Advantech products used, other hardware and software used, etc.) Note
anything abnormal and list any onscreen messages you get when the problem
occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information readily available.
3. If your product is diagnosed as defective, obtain an RMA (return merchandise
authorization) number from your dealer. This allows us to process your return
more quickly.
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 product returned without proof of the purchase date
is not eligible for warranty service.
5. Write the RMA number visibly on the outside of the package and ship it prepaid
to your dealer.

vii AIMB-233 User Manual
Initial Inspection
Before you begin installing your motherboard, please make sure that the following
materials have been shipped:
1 x AIMB-233 Intel® Core™ 9th Gen ULT Mini-ITX
2 x SATA HDD cable
2 x SATA Power cable
3 x Com port cable
1 x CPU Fanless Heat Sink
1 x I/O port bracket
1 x Startup manual
1 x Warranty card
If any of these items are missing or damaged, contact your distributor or sales repre-
sentative immediately. We have carefully inspected the AIMB-233 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-233, check it for signs of ship-
ping damage. (For example, damaged box, scratches, dents, etc.) If it is damaged or
it fails to meet specifications, notify our service department or your local sales repre-
sentative immediately. Also, notify the carrier and retain the shipping carton and
packing material for inspection by the carrier. After inspection, we will make arrange-
ments to repair or replace the unit.

AIMB-233 User Manual viii

ix AIMB-233 User Manual
Contents
Chapter 1 General Information ............................1
1.1 Introduction ............................................................................................... 2
1.2 Features .................................................................................................... 2
1.3 Specifications ............................................................................................ 2
1.3.1 System .......................................................................................... 2
1.3.2 Memory ......................................................................................... 2
1.3.3 Input/Output .................................................................................. 2
1.3.4 Graphics........................................................................................ 3
1.3.5 Ethernet LAN ................................................................................ 3
1.3.6 Industrial features ......................................................................... 3
1.3.7 Mechanical and environmental specifications............................... 3
1.4 Jumpers and Connectors .......................................................................... 4
Table 1.1: Jumpers...................................................................... 4
Table 1.2: Connectors ................................................................. 4
1.5 Board layout: Jumper and Connector Locations ....................................... 5
Figure 1.1 Jumper and Connector Location ................................ 5
1.6 AIMB-232 Board Diagram ......................................................................... 6
Figure 1.2 AIMB-233 Board Diagram .......................................... 6
1.7 Safety Precautions .................................................................................... 6
1.8 Jumper Settings ........................................................................................ 7
1.8.1 How to Set Jumpers...................................................................... 7
1.8.2 CMOS Clear (CMOS1) ................................................................. 7
Table 1.3: CMOS1....................................................................... 7
1.8.3 JLVDS1 / JLVDS2: LCD Power 3.3 V/5 V/ 12 V Selector............. 7
Table 1.4: JLVDS1/JLVDS2: LCD Power 3.3 V/5 V/ 12 V Selector
7
1.8.4 PSON1: ATX, AT Mode Selector .................................................. 8
Table 1.5: PSON1: ATX, AT Mode Selector................................ 8
1.8.5 JWDT1+JOBS1: Watchdog Timer Output and OBS Alarm Option.
8
Table 1.6: JWDT1+JOBS1: Watchdog Timer Output and OBS
Alarm Option............................................................... 8
1.9 System Memory ........................................................................................ 9
1.10 Memory Installation Procedures................................................................ 9
1.11 Cache Memory.......................................................................................... 9
Chapter 2 Connecting Peripherals ....................11
2.1 Introduction ............................................................................................. 12
2.2 LAN Ports and USB Ports (LAN1, LAN2, USB12, USB34, USB56, CN1) ..
12
Table 2.1: LAN LED Indicator.................................................... 12
2.3 HDMI and DP++ Connector (HDMI1/DP1)............................................. 13
2.4 Serial Ports (COM1~COM2) ................................................................... 14
2.5 CPU Fan Connector (CPU_FAN1).......................................................... 15
2.6 System FAN Connector (SYSFAN1)....................................................... 16
2.7 Front Panel Connectors (JFP1/JFP2) ..................................................... 17
2.7.1 ATX soft power switch ((JFP1/PWR_BTN))................................ 17
2.7.2 Reset (JFP1/RST_BTN) ............................................................. 17
2.7.3 HDD LED (JFP2/HDD_LED)....................................................... 17
2.7.4 External speaker (JFP2/SPEAKER) ........................................... 17
2.8 Line Out, Mic In Connector (AUDIO1/AUDIO2) ...................................... 18
2.9 Digital Audio Connector (SPDIF_O1)...................................................... 18

AIMB-232 User Manual x
2.10 Serial ATA Interface (SATA1~SATA2/SATA_PWR1 ~ SATA_PWR2)... 19
2.11 SATA power connector(SATA_PWR1~2)............................................... 20
2.12 Full Size Mini PCI Express Slot .............................................................. 20
2.13 Front Headphone Connector (FP_AUDIO1) ........................................... 21
2.14 ATX 12V/DCIN 12V/5V SB Input Power Connector (ATX12V1/DCIN1). 22
2.15 SPI Flash Connector(SPI_CN1) ............................................................. 23
2.16 LCD Inverter Connector (INV1)............................................................... 24
2.17 LVDS Connector (LVDS1) ...................................................................... 25
2.18 General Purpose I/O Connector (GPIO1) ............................................... 25
Chapter 3 BIOS Operation ................................. 27
3.1 Introduction ............................................................................................. 28
3.2 BIOS Setup ............................................................................................. 28
3.2.1 Main Menu.................................................................................. 29
3.2.2 Advanced BIOS Features ........................................................... 30
3.2.3 Chipset........................................................................................ 41
3.2.4 Boot ............................................................................................ 47
3.2.5 Security....................................................................................... 48
3.2.6 Save & Exit ................................................................................. 49
Chapter 4 Software Introduction & Service ..... 51
4.1 Introduction ............................................................................................. 52
4.2 Value-Added Software Services ............................................................. 52
4.2.1 Software API............................................................................... 52
4.2.2 Software Utility............................................................................ 53
Chapter 5 Chipset Software Installation Utility 55
5.1 Before You Begin.................................................................................... 56
5.2 Introduction ............................................................................................. 56
5.3 Windows Driver Setup ............................................................................ 56
Chapter 6 VGA Setup ......................................... 57
6.1 Introduction ............................................................................................. 58
6.2 Windows ................................................................................................. 58
Chapter 7 LAN Configuration ............................ 59
7.1 Introduction ............................................................................................. 60
7.2 Features.................................................................................................. 60
7.3 Installation............................................................................................... 60
Appendix A I/O Pin Assignments ......................... 61
A.1 USB Header (USB56) ............................................................................. 62
Table A.1: USB Header (USB56) .............................................. 62
A.2 HDMI Connector (HDMI1)....................................................................... 62
Table A.2: HDMI Connector (HDMI1) ........................................ 62
A.3 DP Connector ......................................................................................... 63
Table A.3: DP Connector........................................................... 63
A.4 SPI_CN1: SPI Fresh Card Pin Connector .............................................. 63
Table A.4: SPI_CN1:SPI Fresh Card Pin Connector................. 63

xi AIMB-233 User Manual
A.5CPU Fan Power Connector (CPUFAN1) ................................................ 64
Table A.5: CPU Fan Power Connector (CPUFAN1).................. 64
A.6System Fan Power Connector (SYS_FAN1) .......................................... 65
Table A.6: System Fan Power Connector (SYSFAN1).............. 65
A.7Power Switch/Reset Switch/HDD LED/SMBus/Speaker (JFP1/JFP2) ... 65
Table A.7: Power Switch/Reset Switch/HDD LED/SMBus/Speak-
er (JFP1/JFP2) ......................................................... 65
A.8USB/LAN Ports (LAN1/LAN2/USB12/USB34) ........................................ 66
Table A.8: USB Port................................................................... 66
Table A.9:Ethernet 10/100/1000 Mbps RJ-45 Port................... 66
A.9Line Out, Mic In Connector (AUDIO1/AUDIO2) ...................................... 66
A.10Serial ATA (SATA1 ~ 2) .......................................................................... 66
Table A.10:Serial ATA 0/1 (SATA1/SATA2) ............................... 66
A.11AT/ATX Mode (PSON1) .......................................................................... 67
Table A.11:AT/ATX Mode (PSON1) ........................................... 67
A.12HD Audio Interface (FP_AUDIO1) .......................................................... 67
Table A.12:AC-97 Audio Interface (FPAUD1)............................. 67
A.13GPIO Pin Header (GPIO1)...................................................................... 67
Table A.13:GPIO Pin Header (GPIO1) ....................................... 67
A.14LVDS Connector: LVDS1........................................................................ 68
Table A.14:LVDS Connector: LVDS1 ......................................... 68
A.15LVDS Inverter (INV1) .............................................................................. 69
Table A.15:LVDS Power Jumper................................................ 69
A.16ATX12V/12V DC IN (ATX12V1/DCIN1) .................................................. 69
Table A.16:ATX 12 V connector (ATX12V1)............................... 69
A.17HD Digital Audio Interface (SPDIF_O1) .................................................. 69
Table A.17:HD Digital Audio Interface (SPDIF_OUT1)............... 69
A.18Amplifier Audio Output (AMPJ1) ............................................................. 70
Table A.18:Amplifier Audio Output (AMPJ1)............................... 70
A.19 COM1/COM2 Box Header (COM1/COM2) ............................................. 70
Table A.19:COM1/COM2 Box Header (COM1/COM2)............... 70
A.20Watch dog and Open chassis alarm (JWDT1+JOBS1) .......................... 71
Table A.20:Watchdog and Open Chassis Alarm (JWDT1+JOBS1)
71
A.21Low Pin Count Bus (LPC1) ..................................................................... 71
Table A.21:Low Pin Count Bus (LPC1)....................................... 71

AIMB-233 User Manual xii

Chapter 1
1General Information

AIMB-233 User Manual 2
1.1 Introduction
AIMB-233 is designed with the Intel® Whiskeylake ULT Dual/Quard Core proces-
sors for industrial applications that require both performance computing and
enhanced power management capabilities. The motherboard supports Intel
whiskeylake ULT Dual Celereon 2.0 GHz / i3 2.2 GHz processors, Quard core i5 1.6
GHz / i7 1.7 GHz processors and DDR4 SO-DIMM 2400 up to 16GB. Multiple I/O
connectivity includes 6 serial ports, 4 USB 3.1, 2 USB 3.0, 2 USB 2.0, dual GbE
LAN and 2 SATA III ports.
1.2 Features
Rich I/O connectivity: 6 serial ports, 4 USB 3.1, 2 USB 3.0, 2 USB 2.0, 2
SATA 3.0, 1 M.2 E key, 1 M.2 M key, 1 PCIex1, Dual GbE LAN
Standard Mini-ITX form factor with industrial features: The AIMB-233 is a
full featured Mini-ITX motherboard with balanced expandability and perfor-
mance.
Wide selection of storage devices: SATA HDD, customers benefit from the
flexibility of using the most suitable storage device for larger capacity.
Optimized integrated graphic solution: With Intel® Graphics Flexible, it
sup-ports versatile display options and 32-bit 3D graphics engine.
1.3 Specifications
1.3.1 System
CPU: BGA 1528 14nm Processor ULT Dual/Quard Core I7/ i5/ i3/ Celeron
processor
BIOS: AMI uEFI 32 Mbit SPI BIOS
System chipset: Intel® Cannon Lake PCH-LP
SATA hard disk drive interface:
–Two on-board SATA connectors with data transmission rate up to 600 MB
M.2 Interface: Supports M.2 E key (2230) and M key (2242 & 2280)
1.3.2 Memory
RAM: Up to 32 GB in 2 slots 260-pin SODIMM sockets. Supports dual channel
DDR4 2400 MHz SDRAM
1.3.3 Input/Output
Serial ports: Six serial ports, support 5 x RS-232 and 1 x RS-232/422/485
(with hardware auto flow control)
USB port: Supports up to eight USB ports with transmission rates of up to 10
gbps, including 4 x USB 3.1 & 2 x USB 3.0 and 2 x USB 2.0.
GPIO connector: 8-bit general purpose Input/Output

3AIMB-233 User Manual
Chapter 1 General Information
1.3.4 Graphics
Controller: Embedded in processor, Support DirectX 12, OpenGL 4.5,
OpenCL 2.1, Full HW accelerated video decoding/encoding for AVC/MPEG2/
HEVC/VP8/VP9/MJPEG. (VC1: decoding only)
LVDS: Chrontel CH7511 single channel 24-bit/ dual channel 48-bit LVDS, Max
1920 x 1200 @ 60 Hz
HDMI: Supports HDMI 2.0a for HD video playback max resolution up to
4096x2160@60Hz on HDMI
Type C Alt.: Supports DP 1.2 from Whiskeylake-U Processor, max resolution
up to 4096x2304@60Hz,24bpp.
1.3.5 Ethernet LAN
Supports dual 10/100/1000 Mbps Ethernet port (s) via PCI Express x1 bus
which provides 500 MB/s data transmission rate
Controller: LAN1: Intel I219LM GbE PHY; LAN2: Intel I211AT GbE (co-lay intel
I210IT)
1.3.6 Industrial features
Watchdog timer: Can generate a system reset. The watchdog timer is pro-
grammable, 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 speed and
cooler solution)
Storage temperature: -40 ~ 85° C (-40 ~ 185° F)
Humidity: 5 ~ 95% non-condensing
Power supply voltage: 12 ~ 24V
Power consumption: Typical: 26.74W @12V, 29.04W @24V
Boost: 63.28W @12V, 64.73W @24V
Measure the maximum current value which system under maximum load (CPU:
Top speed, RAM & Graphic: Full loading)
Board size: 170 mm x 170 mm (6.69" x 6.69")
Board weight: 0.365 kg
Note! Triple independent displays need to use HDMI2.0a+Type C Alt.+LVDS (or eDP).

AIMB-233 User Manual 4
1.4 Jumpers and Connectors
Connectors on the AIMB-233 motherboard link it to 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 application.
The tables below list the function of each of the board jumpers and connectors. Later
sections in this chapter give instructions on setting jumpers. Chapter 2 gives instruc-
tions for connecting external devices to your motherboard.
Table 1.1: Jumpers
Label Function
JFP1/JFP2 Front Panel Header
CMOS1 CMOS clear (Default 1-2)
PSON1 AT(1-2) / ATX(2-3) (Default 2-3)
JWDT1+JOBS1 Watchdog Reset and OBS Alarm
JLVDS1 Voltage 3.3V/5V/12V selector for LVDS1 connector
(Default none, 3.3V)
COM1/COM2 RS-232
CPUFAN1/SYSFAN FAN control by DC or PWM mode selection
Table 1.2: Connectors
Label Function
LVDS_EDP1 LVDS/eDP(Optional) connector
INV1 LVDS inverter connector
USB0102 USB port 1, 2 connector
USB03/USB04 USB port 3, 4 connector
USB0506 USB port 5, 6 (on board)
HDMI HDMI 2.0a connector
Type C Alt.
COM1, 2 Serial port connector (RS232)
CPUFAN1 CPU FAN 2.54mm connector (4-pin)
SYSFAN1/SYSFAN2 System FAN1 2.54mm connector (4-pin)
LAN12LAN1 / LAN2
AUDIO1, AUDIO2 Audio connector
SPDIF1 SPDIF Audio out pin header
FPAUD1 HD Audio Front Panel Pin Header
SATA1/SATA2 Serial ATA data connector 1/2
SATA_PWR1/2 Serial ATA power connector 1/2
DIMMA1/DIMMB1 Memory connector channel
LPC1
Low Pin Count Header
GPIO1 GPIO header
COM3456 COM3: RS-232/422/485, COM4/5/6: RS-232
USB0809 USB port 8, 9 (on board)
USB type C connector
COM3456 COM3: RS-232/422/485, COM4/5/6: RS-232
M2M1 M.2 M-Key connector_2242/2280
M2E1 M.2 E-Key connector_2230
MINI PCIE connector
MINI_PCIE1
PCIEX1_1 PCI Express x1 slot

5AIMB-233 User Manual
Chapter 1 General Information
1.5 Board layout: Jumper and Connector Locations
Figure 1.1 Jumper and Connector Location
BAT1 Battery connector
DCIN1 DC jack 12-24V Main power connector
AMP1 Amplifier connector
Table 1.2: Connectors

AIMB-233 User Manual 6
1.6 AIMB-233 Board Diagram
1.7 Safety Precautions
Warning! Always completely disconnect the power cord from chassis whenever
you work with the hardware. Do not make connections while the power
is on. Sensitive electronic components can be damaged by sudden
power surges. Only experienced electronics personnel should open the
PC chassis.
Caution! Always ground yourself to remove any static charge before touching the
motherboard. Modern electronic devices are very sensitive to electro-
static discharges. As a safety precaution, use a grounding wrist strap at
all times. Place all electronic components on a static-dissipative surface
or in a static-shielded bag when they are not in the chassis.
Caution! The computer is provided with a battery-powered real-time clock circuit.
There is a danger of explosion if battery is incorrectly replaced. Replace
only with same or equivalent type recommended by the manufacturer.
Discard used batteries according to manufacturer's instructions.
Caution! There is a danger of a new battery exploding if it is incorrectly installed.
Do not attempt to recharge, force open, or heat the battery. Replace the
battery only with the same or equivalent type recommended by the man-
ufacturer. Discard used batteries according to the manufacturer’s
instructions.
Figure 1.2 AIMB-233 Board Diagram

7AIMB-233 User Manual
Chapter 1 General Information
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 (JCMOS1)
The AIMB-233 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 JLVDS1 : LCD Power 3.3 V/5 V/ 12 V Selector
*Default
Table 1.3: CMOS1
Function Jumper Setting
*Keep CMOS data
Clear CMOS data
1-2 closed
2-3 closed
Table 1.4: JLVDS1/JLVDS2: LCD Power 3.3 V/5 V/ 12 V Selector
Closed Pins Result
JLVDS1
3-4 Jumper for 12 V LVDS panel
4-6 Jumper for 3.3 V LVDS panel*
2-4 Jumper for 5 V LVDS panel

AIMB-233 User Manual 8
1.8.4 PSON1: ATX, AT Mode Selector
*Default
1.8.5 JWDT1+JOBS1: Watchdog Timer Output and OBS Alarm
Option
*Default
Table 1.5: PSON1: ATX, AT Mode Selector
Closed Pins Result
1-2 AT Mode
2-3* ATX Mode
AT Mode
1-2 closed
ATX Mode
2-3 closed
Table 1.6: JWDT1+JOBS1: Watchdog Timer Output and OBS Alarm
Option
Closed Pins Result
1-2 NC
2-3* Watchdog Timer Output OBS_Beep
4-5* Error Beep*
+12V
3-4 closed
+3.3V
4-6 closed 2-4 closed
+5V