PS/2 Mouse Connector USB Connector

SPP/ECP/EPP Print Port

RJ45 LAN Connector

PS/2 Keyboard Connector

COM 2 Port

COM 1 Port

WOL Connector (Wake On LAN) Intel 82559 10/100 LAN Controller AGP Pro Slot

CPU #1 CPU #2

Low ESR Capacitor Dual CPU Sockets Thermal Sensor Connector CPU Fan Connector
32 Bit PCI Slot x 5 4Mbit Flash BIOS SCSI Card HDD LED Connector
VIA Apollo Pro 133A Chipset
PC-133 DIMM Slot x 3 SSI ATX Power Connector
Adaptec Ultra3 SCSI Controller AGP Pro Power Connector System Fan Connector ATA/100 IDE Connector Redundant SPS Connector Front Panel Connector BP (Back plane) Connector
Dual Channel Ultra3 SCSI Connector

1.Installing CPU

CPU Pin 1 and cut edge 1. 2. Pull up the CPU socket lever and up to 90-degree angle. Locate Pin 1 in the socket and look for a (golden) cut edge on the CPU upper interface. Match Pin 1 and cut edge. Then insert the CPU into the socket. Press down the CPU socket lever and finish CPU installation.
Everything you need to boot this motherboard is included in this Easy Installation Guide. For more information, a complete Online User's Manual can be found in the Bonus Pack CD Disc. Thanks for the help of saving our earth!
Note: If you do not match the CPU socket Pin 1 and CPU cut edge well, it may damage the CPU.

CPU socket lever

2. Installing CPU & Housing Fan
Plug in the CPU fan cable to the 3-pin CPU FAN connector and housing fan cable to the Housing Fan connector.
Hard Drive IDE Cable x 1 80-Wire IDE Cable x 1 Floppy Drive Cable x 1 Ultra 160 SCSI 68 pin Cable x 1 Bonus Pack CD disc x 1 User Manual x 1 This Easy Installation Guide x 1 I/O Bracket x 1 ASM Lite x 1
System fan connector Sensor +12V GND CPU fan connector GND +12V Sensor
System fan connector PART NO: 90.50F30.007 DOC. NO: DX34PU-EG-E0110B GND +12V Sensor
3. Installing Thermal Sensor (Optional)
The Thermal Sensor Connector (CN12 & CN1) provides you to use the thermal sensor to detect the temperature of the components on the motherboard.
5. SW1 Setting CPU FSB Frequency & Ratio
When you are using the Intel engineer sample CPU with DX34/DX34Plus, the SW1 allows you select the CPU ratio from 2 to 9.5. You can adjust the SW1 to get the correct CPU working ratio and frequency.

GND Sensor SW1

Warning: We strongly recommend you do not overclocking your CPU and system for get more system reliability.

4. Supported CPU Type

Bit1 The DX34 Plus-U supports Intel Socket 370 Celecron and Pentium III series CPU. Including the code name Tualatin 512K cache CPU for dual CPU configuration.
Bit2 On Off On Off On Off On Off On Off On Off On Off On Off
Bit3 On On Off Off On On Off Off On On Off Off On On Off Off
Bit4 On On On On Off Off Off Off On On On On Off Off Off Off
Coppermine Ratio X2 X2.5 X3 X3.5 X4 X4.5 X5 X5.5 X6 X6.5 X7 X7.5 X8 X8.5 X9 X9.5 100Mhz 133Mhz 1200 1266
Coppermine D-step Ratio X4 X9.5 X8.5 X9 Reserved Reserved Reserved X5.5 X6 X6.5 X7 X7.5 X8 Reserved Reserved X2 FSB 133Mhz Reserved Reserved Reserved Reserved Reserved 266
On On On On On On On On Off Off Off Off Off Off Off Off
Processor Name PentiumII Single Processor Pentium !!! Celeron Pentium II Dual Processor Pentium !!! Pentium !!! 512K
CPU Package All All FCPGA All Coppermine Tualatin

6. Install DIMM Modules

This motherboard has three 168-pin DIMM sockets that allow you to install PC100 or PC133 memory up to 1.5GB. The DX34 Plus - U supports not only SDRAM but also ECC or Registered DRAM.
8. Redundant SPS Monitoring Connector

This motherboard implements Redundant SPS monitoring connector to provide hardware monitoring signals. It is feasible to install an additional 337-watt power supply module (optional with AOpen Server Housing) in a hot swappable configuration. If any SPS failed, a signal will be sent to a hardware monitoring device.
PS_ON PS 3 Fail Fan 3 Fail Present I C CLK Fan 1 Fail PS 1 Fail

DIMM 3 DIMM 2 DIMM 1

Present 3 GND
PS 2 Fail Fan 2 Fail Present 2 5VSB
7. Connecting ATX and AGP Pro Power Connector
The DX34Plus-U uses standard ATX power connector. The 6-pin AGP Pro Power connector provides extra +5V and +3.3V power for AGP Pro VGA card. Make sure you plug in the right direction.
+5V 5VSB COM +5V COM +5V COM +3.3V +3.3V +5V -5V COM COM COM PS-ON COM -12V +3.3V
9. Connecting IDE & FDD Cable
Connect 34-pin floppy cable and 40-pin ATA100 or ATA33 IDE cable to floppy connector FDC and IDE connector IDE1, IDE2. Pin1 of cable is normally marked with red color. Be careful of the pin1 orientation. Wrong orientation may cause system damage. Primary Master (1st) Primary Slave (2nd)
IDE1 (Primary) FDD Connector

ATA/66 IDE Connector

IDE2 (Secondary)
Standard ATX Power Connector

GND GND GND

AGP Pro Power

+5V +3.3V +3.3V

Secondary Master (3rd)

Secondary Slave (4th)

10. Connecting 68-pin Ultra3 SCSI Cable
The DX34Plus-U provides two 68-pin Ultra Wide/Ultra 2/3 SCSI connectors for 16-bit or 16-bit differential SCSI devices.

12. JP14 Clear CMOS

You can clear CMOS to restore system default setting. To clear the CMOS, follow the procedure below. 1. Turn off the system and unplug the AC power. 2. Remove ATX power cable from connector PWR2. 3. Locate JP14 and short pins 2-3 for a few seconds. 4. Return JP14 to its normal setting by shorting pins 1 & pin2.
68-pin SCSI Ultra3 Connectors
5. Connect ATX power cable back to connector PWR2.
Normal Operation (default)

Clear CMOS

11. Connecting Front Panel Connector
Attaching such as power LED, speaker, reset switch, power switch connector, etc. to corresponding pins.
ATX Power Switch Power LED Chassis Intrusion Switch
13. Connecting SCSI Card LED Connector
The 4-pin SCSI LED connector can be connected to a PCI SCSI control card activity LED connector. Read or write activity by devices connected to the SCSI card will make the LED lighting up.

HDD LED

Reset Switch
+5V GND PWR LED +5VSB GND +5V HDD LED HDD LED +5V
RST S/W INT S/W GND GND CN24 + CN23 + + + -
14. Select Buzzer or Ext. Speaker (Optional)
There is one jumper cap over pin1 and pin2 of JP4 for internal buzzer. If you want to use external case-mounted speaker instead of internal buzzer, please remove jumper cap to short pin2 and pin3.

16. Wake On LAN

This feature is very similar as Wake On Modem, but it goes through local area network. To use Wake On LAN function, you must have a network card with chipset that supports this feature, and connect a cable from LAN card to motherboard WOL connector.

+5VSB GND LID

Buzzer (Default)

Speaker

15. On board SCSI controller Channel
The JP3/JP3X allows you to enable or disable the on-board SCSI Channel A and B terminator control function. The SCSI Channel A is controlled by JP3; the Channel B is controlled by JP3X.
17. Power-On and Load BIOS Setup
After you finish the setting of jumpers and connect correct cables. Power on and enter the BIOS Setup, press <Del> during POST (Power On Self Test). Choose "Load Default Setting" for recommended optimal performance.

ON (Default)

Warning: Please avoid of using "Load Turbo Defaults", unless you are sure your system components (CPU, DRAM, HDD, etc.) are good enough for turbo setting.
Part Number and Serial Number
If you encounter any trouble to boot you system, follow the procedures accordingly to resolve the problem. The Part Number and Serial number are printed on bar code label. You can find this bar code label on the outside packing, on ISA/CPU slot or on component side of PCB. For example:
Turn off the power and unplug the AC power cable, then remove all of the addon cards and cables, including VGA, IDE, FDD, COM1, COM2 and Printer.
Make sure if the jumper settings for CPU and DRAMs are correct.

Part No

Serial No

Clear CMOS.

Install the VGA card. Then connect your monitor and keyboard.
P/N: 91.88110.201 is part number, S/N: 91949378KN73 is serial number.
Turn on the power, and check if the power supply and CPU fan work properly. No The problem was probably caused by power supply or motherboard failure. Please contact your reseller or local distributor for repairing.
Yes Check if there is display. No Perhaps your VGA card or monitor is defective.
Press Ctrl, and Alt key at the same time, hold them and then press Del to see if the system reboots.
No It is very possible that your keyboard is defective.
Yes During system rebooting, press Del to enter BIOS Setup. Choose Load Setup Default".
Turn off the system and re-connect the IDE cable. Check if the system can reboot successfully.
No The problem should be caused by the IDE cables or HDD itself.
Yes Re-install Windows 95, Windows 98 or Windows NT.
Dear Customer, Thanks for choosing AOpen products. To provide the best and fastest service to our customer is our first priority. However, we receive numerous emails and phone-calls worldwide everyday, it is very hard for us to serve everyone on time. We recommend you follow the procedures below and seek help before contact us. With your help, we can then continue to provide the best quality service to more customers. Thanks very much for your understanding! AOpen Technical Supporting Team Pacific Rim AOpen Inc. Tel: 886-2-2696-1333 Fax: 886-2-8691-2233 China () Tel: 49-2102-157700 Fax: 49-2102-157799 Europe AOpen Computer b.v. Tel: 31-73-645-9516 Fax: 31-73-645-9604 Germany AOpen Computer GmbH. Tel: 49-2102-157700 Fax: 49-2102-157799

Online Manual: Please check the manual carefully and make sure the jumper settings and installation procedure are correct. http://www.aopen.com.tw/tech/download/manual/default.htm
Test Report: We recommend to choose board/card/device from the compatibility test reports for assembling your PC. http://www.aopen.com.tw/tech/report/default.htm
FAQ: The latest FAQ (Frequently Asked Questions) may contain a solution to your problem. http://www.aopen.com.tw/tech/faq/default.htm
Download Software: Check out this table to get the latest updated BIOS/utility and drivers. http://www.aopen.com.tw/tech/download/default.htm
News Group: Your problem probably had been answered by our support engineer or professional users on the news group. http://www.aopen.com.tw/tech/newsgrp/default.htm
America AOpen America Inc. Tel: 1-510-498-8928 Fax: 1-408-922-2935, 1-408-432-0496
Contact Distributors/Resellers: We sell our products through resellers and integrators. They should know your system configuration very well and should be able to solve your problem more efficien n important reference for you if next time you want to buy something else from them.
Web Site: www.aopen.com E-mail: Send us email by going through the contact form below. English Japanese Chinese German French Simplified Chinese http://www.aopen.com.tw/tech/contact/techusa.htm http://aojp.aopen.com.tw/tech/contact/techjp.htm http://w3.aopen.com.tw/tech/contact/techtw.htm http://www.aopencom.de/tech/contact/techde.htm http://aofr.aopen.com.tw/tech/contact/techfr.htm http://www.aopen.com.cn/tech/contact/techcn.htm Contact Us: Please prepare detail system configuration and error symptom before contacting us. The part number, serial number and BIOS version are also very helpful.