DEX4502 - Industrial computer AOPEN - Free user manual and instructions

Type de produit	LCD Monitor
Marque	AOpen
Modèle	DEX4502
Taille de l'écran	24 inches (diagonal)
Résolution	1920 x 1080 (Full HD)
Taux de rafraîchissement	60 Hz
Format d'image	16:9
Luminosité	250 cd/m²
Taux de contraste	1000:1
Temps de réponse	5 ms
Connectivité	VGA, HDMI 1.4, DisplayPort 1.2
Consommation électrique (typique)	30 W
Consommation en veille	< 0.5 W
Poids (avec pied)	4.5 kg
Dimensions (avec pied) LxHxP	550 x 400 x 200 mm
Fixation VESA	100 x 100 mm
Fonctions principales	Flicker-free, Blue light filter, Tilt adjustment
Entretien et nettoyage	Use a soft dry cloth; do not use liquids or abrasives
Sécurité	Use a grounded outlet; do not block ventilation slots
Pièces détachées et réparabilité	Power cable included; not user-serviceable; contact AOpen support
Informations générales	50-page manual available for download

Frequently Asked Questions - DEX4502 AOPEN

How do I connect the monitor to my PC?

Connect one end of the HDMI, DisplayPort, or VGA cable (depending on your PC's ports) to the monitor and the other end to your PC. Then, press the power button on the monitor. If no image appears, select the correct input source using the Menu button.

How do I adjust brightness and contrast?

Press the Menu button on the monitor, navigate to Brightness/Contrast using the arrow keys, and adjust values with the + and - buttons. Press Menu to exit.

What refresh rate does the monitor support?

The monitor supports a maximum refresh rate of 60 Hz at 1920 x 1080 resolution. Ensure your PC display settings are set to 60 Hz for optimal performance.

Does the monitor have built-in speakers?

No, the AOpen DEX4502 does not include built-in speakers. You can connect external speakers via the audio jack if your PC outputs audio through HDMI or DisplayPort, or use your PC's separate audio output.

How do I clean the screen safely?

Turn off the monitor and unplug it. Use a soft, dry, lint-free cloth to gently wipe the screen. Do not use any liquids, cleaning sprays, or abrasive materials as they may damage the display.

Can I mount the monitor on a wall?

Yes, the monitor is VESA compatible with a 100 x 100 mm pattern. You will need a compatible wall mount kit (screws usually included). Follow the wall mount manufacturer's instructions.

Is the monitor VESA compatible?

Yes, the monitor supports VESA 100 x 100 mm. Remove the stand to access the mounting holes. Use four screws of appropriate length (typically M4) to attach the mount.

How do I reset the monitor to factory settings?

Press the Menu button, go to System Setup or OSD Setup, select Factory Reset, and confirm. This restores all settings to default values.

What is the warranty period for this monitor?

The AOpen DEX4502 typically comes with a 3-year limited warranty. For exact terms and claims, refer to the warranty card included in the box or contact AOpen customer support.

How do I check for dead or stuck pixels?

Display a solid color image (e.g., black, white, red) using a test pattern. Inspect the screen from a normal viewing distance. A few stuck pixels may be considered acceptable per industry standards. If you notice many, contact AOpen support.

USER MANUAL DEX4502 AOPEN

Assembly Guide for DEX4500 series

Front view of a black server rack with three ports and ventilation slots (no visible text or labels)

V2.0

2008/12/17

Index

1. Outlook ......2
2. Install Key components ( Except Mini card module installation)......4
3. Install Key components ( Including Mini card module installation)...16
4. Connector & PINs definitions....39
5. Appendix 1 Packing List....41
6. Appendix 2 Table of Screw and Torque....42
7. Appendix 3 Watch Dog Timer Configuration....43
8. Appendix 4 Outline Drawing....48

1. Outlook

Front IO

Rear IO
Antenna Hole

2. Install Key components (Except Mini card module installation)

2-1.

Loosen 2 pcs of front panel screw (FPH M3 screw) by the screw driver and remove it.

Back panel of a black electronic device with three ports and two red circular annotations pointing to the left port (no text or symbols on the device itself)

Unscrew 2 x FPH M3 screw

2-2.

Loosen 4 pcs of Top cover screw (FPH M3 screw) by the screw driver and remove it.

Close-up of a black rectangular electronic component with red annotation arrows pointing to specific areas (no text or symbols visible)

Unscrew 4 x M3 screw

2-3.

You will see the kernel of Digital Engine.

2-4 Install Memory

2-4-1.

Loosen 2 pcs of DIMM heatsink screw (FPH M3 screw) by the screw driver and remove it.

2-4-2.

Insert the memory on the upper socket as this angle.

2-4-3. 2-4-4.

Then press the DIMM as flat on the Motherboard, and you will hear the click voice.

Make sure it clicks

Take off the protect Mylar of thermal pad of DIMM heatsink and place it back to ICH heatsink.

Metal L-shaped object with red and gray colored blocks, no visible text or symbols

2-4-5.

Screw it tightly with 2 pcs of FPH M3 screws by the screw driver

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

2-5 Install CPU

2-5-1.

Loosen 4 pcs of CPU cooler screw by the screw driver and remove it.

2-5-2.

Unlock the CPU socket screw Counterclockwise

Close-up of a green circuit board with a pink CPU socket and soldering tool inserted, no visible text or symbols

2-5-3

Put the CPU into the socket, and check the direction.

Close-up of a green printed circuit board with a central processor and red circular annotation (no readable text or symbols)

2-5-4.

Lock the CPU socket screw clockwise

Interior view of an electronic circuit board with visible components and wiring (no readable text or symbols)

2-5-5.

Place the CPU cooler back and follow up the sequence to screw it tightly

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Interior view of an electronic device showing internal components and wiring (no readable text or symbols)

2-5-6.

Place the Top Cover back and screw it tightly with 4 pcs of FPH M3 screws by the screw driver. (Screwdriver torque : 3.0 ±0.5 kgf. cm )

Close-up of a black corrugated metal panel with four red-circled highlights (no text or symbols visible)

2-6 Install HDD

2-6-1

Turn over the system and loosen 4 pcs of Bottom cover screw ( FPH M3 screw ) by the screw driver and remove it

Black metal panel with white mounting flanges and red circular annotations highlighting features (no text or symbols)

2-6-2

Remove the Bottom Cover.

HDD Bracket

Interior view of a computer monitor case with visible wiring and a red arrow indicating direction (no text or symbols)

Power & SATA cable

2-6-3.

Connect HDD to SATA and Power cable, then put HDD on the HDD bracket.

2-6-4.

Tighten HDD with 4pcs of FPH M3 screw (on both flanks)

(Screwdriver torque : 2.5 ±0.1 kgf. cm )

Internal view of a hard disk drive housing with visible wiring and mounting points (no text or symbols on the device body)

2-6-5.

T

Bottom Cover before place it back.

Black metal frame with a white rectangular object and a red 3D cube placed on top (no text or symbols visible)

2-6-6.

Place Bottle of other product My screw with highly pad on with 4 pcs of FPH M3 screws by the screw driver.

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Black metal panel with white connectors and red circular annotations (no readable text or symbols)

2-7.

Place Front Panel back and screw it tightly with 2 pcs of FPH M3 screws by the screw driver. (Screwdriver torque : 3.0 ±0.5 kgf. cm )

Front view of a black electronic device with four ports and two red circular buttons (no visible text or symbols)

FPH M3xL5 Screw

Two black threaded fasteners on a plain white background (no text or symbols visible)

NDE

Front view of a silver industrial electronic device with multiple ports and ventilation grilles (no visible text or labels)

3. Install Key components (Including Mini card module installation)

3-1.

Loosen 2 pcs of front panel screw (FPH M3 screw) by the screw driver and remove it.

Back panel of a black electronic device with three ports and two red circular annotations pointing to the left port (no text or symbols on the device itself)

Unscrew 2 x FPH M3 screw

3-2.

Loosen 4 pcs of Top cover screw (FPH M3 screw) by the screw driver and remove it.

Close-up of a black panel with red annotation arrows pointing to specific edges (no text or symbols present)

Unscrew 4 x M3 screw

3-3.

You will see the kernel of Digital Engine.

3-4 Install WLAN & TV-Tuner Module.

3-4-1. 3-4-2.

Loosen 2 pcs of DIMM heat sink – AL cover screw (FPH M3 screw) by the screw driver and remove it.

Loosen 1 pcs of Top-Back cover screw (FPH M3 screw) by the screw driver and remove it.

Close-up of a mechanical device component with a red circle highlighting a specific pin (no visible text or symbols)

Unscrew

3-4-3. 3-4-4.

Loosen 2 pcs of MCH heat sink – AL cover screw (FPH M3 screw) by the screw driver and remove it.

Loosen 1 pcs of Top-Back Cover screw (FPH M3 screw) by the screw driver and remove it.

3-4-5. 3-4-6.

Remove Top -Back Cover.

Close-up of a gloved hand installing or adjusting electronic components on an open circuit board, with a red upward arrow indicating motion (no text or symbols visible)

Loosen 4 pcs of DIMM & ICH heat sink screw (FPH M3 screw) by the screw driver and remove it.

3-4-7. 3-4-8.

WLAN Mini card module List.

Loosen 1 pcs of Mini Card screw by the screw driver and remove it.

3-4-9. 3-4-10.

Install WLAN Mini card and fix 1 pcs of Mini Card screw by the screw driver.

(Screwdriver torque : 1.0 ±0.1 kgf. cm )

Remove the metal cover of the WLAN antenna hole by the screw driver.

3-4-11.

Insert WLAN Antenna into the hole. Tighten the nut by the screw sleeve. (The diameter of the nut is 8mm).

Close-up of a computer motherboard with a red arrow pointing to a component (no visible text or symbols)

Close-up of a computer interface showing a gold connector and multiple Ethernet ports (no text or symbols visible)

Screw

3-4-12.

Buckle the mini card with the Antenna wire (CON1) and arrange the wire according to the photo.

Buckle

Internal view of a computer motherboard with visible circuitry and wiring (no readable text or symbols)

Arrange the wire

3-4-13. 3-4-14.

TV-Tuner Mini card module List.

Three electronic components laid out on a plain surface: a small circuit board, a black cable with wires, and a black antenna (no visible text or symbols)

Loosen 1 pcs of Mini Card screw by the screw driver and remove it.

3-4-15. 3-4-16.

Install TV-Tuner Mini card and fix 1 pcs of Mini Card screw by the screw driver. (Screwdriver torque: 1.0 ± 0.1 kgf. cm)

Remove the metal cover of the TV-Tuner antenna hole by the screw driver.

3-4-17. 3-4-18.

Insert TV-Tuner Antenna into the hole. Tighten the nut by the screw sleeve. (The diameter of the nut is 8mm).

Buckle the mini card with the Antenna wire and arrange the wire according the photo.

3-4-19. 3-4-20.

Install ICH heat sink vertically and tighten 2 pcs of screw (FPH M3 screw) by the screw driver.

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Install Top -Back Cover.

Close-up of a gloved hand installing or adjusting a black electronic device with visible wiring and components (no text or symbols)

3-4-21. 3-4-22.

Tighten 2 pcs of Top -Back Cover screw (FPH M3 screw) by the screw driver. (Screwdriver torque : 3.0 ±0.5 kgf. cm )

Tighten 4 pcs of DIMM & MCH heat sink – AL covers screw (FPH M3 screw) by the screw driver.

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

3-4-23. 3-4-24.

Note that DIMM & MCH heat sink – AL cover have to be installed in the correct position to avoid influence the thermal efficiency.

Note that detach ICH heat sink after DIMM heat sink – AL cover has already to be detached to avoid damage the thermal pad.

3-5-1. 3-5-2.

Insert the memory on the upper socket as this angle.

Press the DIMM as flat on the Motherboard, and you will hear the click voice.

Close-up of an electronic circuit board with copper and infrared components, showing a green circuit board and red annotations (no readable text or symbols)

Make sure it clicks

3-5-3.

Take off the protect Mylar of thermal pad of DIMM heatsink and place it back to ICH heatsink.

Metallic metal bracket with a red and pink patch, no text or symbols visible

3-5-4.

Screw it tightly with 2 pcs of FPH M3 screws by the screw driver

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Interior view of an electronic device showing internal components like CPU, memory, and circuit board (no text or symbols visible)

Screw

3-6 Install CPU

3-6-1.

Loosen 4 pcs of CPU cooler screw by the screw driver and remove it.

3-6-2.

Unlock the CPU socket screw. Counterclockwise.

Close-up of a green circuit board with a pink CPU socket and soldering tool inserted, no visible text or symbols

3-6-3

Put the CPU into the socket, and check the direction.

Close-up of a green printed circuit board with a central processor and red circular annotation (no readable text or symbols)

3-6-4.

Lock the CPU socket screw clockwise

Close-up of an electronic circuit board with visible components and wiring, no readable text or symbols present.

3-6-5.

Place the CPU cooler back and follow up the sequence to screw it tightly

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

3-6-6.

Place the Top Cover back and screw it tightly with 4 pcs of FPH M3 screws by the screw driver.

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Close-up of a black corrugated metal panel with four red-circled highlights (no text or symbols visible)

3-7 Install HDD

3-7-1

Turn over the system and loosen 4 pcs of Bottom cover screw (FPH M3 screw) by the screw driver and remove it.

Black plastic heat exchanger or cooling unit with red circular annotations highlighting specific components (no text or symbols visible)

3-7-2

Remove Bottom Cover.

HDD Bracket

Interior view of an electronic device showing a circuit board with connectors and wiring, marked by red arrows (no text or symbols visible)

Power & SATA cable

3-7-3.

Connect HDD to SATA and Power cable, then put HDD to HDD bracket

Internal view of a hard disk drive with visible wiring and connectors (no readable text or symbols)

3-7-4.

Tighten HDD with 4pcs of FPH M3 screw (on both flanks)

(Screwdriver torque : 2.5 ±0.1 kgf. cm )

3-7-5.

T

Botwidth4Close of FeRheMoBaseribly.the scre

Black metal frame with a white rectangular object and a red 3D cube placed on top (no text or symbols visible)

3-7-6.

Place BothbendoftherprotecaMlyserovtheighallypad on w

driver.

(Screwdriver torque : 3.0 ±0.5 kgf. cm )

Black plastic heat sink component with red circular annotations highlighting specific areas (no text or symbols present)

3-8.

Place Front Panel back and screw it tightly with 2 pcs of FPH M3 screws by the screw driver. (Sewdriver torque: 3.0 ± 0.5 kgf. cm)

Front view of a black electronic device with four ports and two red circular markers on the left side (no visible text or symbols)

FPH M3xL5 Screw

Two black plastic screw nuts on a plain white background (no text or symbols visible)

NDE

Front view of a silver industrial electronic device with three ports and ventilation grille (no visible text or symbols)

4. Connector & PINs definitions

4-1.
COM1 connector

4-2
Front Panel connector

4-3. 4-4.

USB 2.0 connector Front Audio connector

Appendix 1 Packing List

1 x DEX4500 system
1 x Easy Assembly Guide
1 x Driver CD
1 x 90W Adapter and Power Cord
4 x M3 - L5 screws
2 x Cable clamp
1 x DVI to VGA adapter
☐ 1 x SATA to Compact Flash card bridge
☐ 1 x HDMI to DVI cable
☐ 12 x HEX screw and 1 x HEX key

Appendix 2 Table of Screw and Torque

No.	Screw Photo Position	Q'ty Screw spec.	Torque Screw driver	spec.
1	12 FPH M3- L5	3.0 ± 0.5		kgf-cm

Appendix 3 Watch Dog Timer Configuration

The WDT is used to generate a variety of output signals after a user programmable count. The WDT is suitable for use in the prevention of system lock-up, such as when software becomes trapped in a deadlock. Under these sort of circumstances, the timer will count to zero and the selected outputs will be driven. Under normal circumstance, the user will restart the WDT at regular intervals before the timer counts to zero.

CODE FLOW-CHART

graph TD
    A["Start"] --> B["Initial Watchdog Pin"]
    B --> C["Stop Timer and Clear Status"]
    C --> D["(1) set --> Logical Device: 0x08\nCR: 0 x F7\nBit: 4 = 0 Timer counting\n(2) Set --> Logical Device: 0x08\nCR: 0 x F6\nBit: 7~0 = 0x00 Stop timer\n(2) Set --> Logical Device: 0x08\nCR: 0 x F3\nBit: 0 = 1, activate WDTO\n(2) Set --> Logical Device: 0x09\nCR: 0 x F30\nBit: 3 = 1 activate GPIO5\nCR: 0 x E0, 0 x E1, 0 x E2\nBit: 6, Bit: 7, Bit: 6\n= 0 GPIO port is programmed as an output port."]

graph TD
    A["Set Min/Sec Mode"] --> B["Start Timer"]
    B --> C["End"]
    D["1. Set Mode\n(1)set --> Logical Device: 0x08\nCR: 0xF5\nBit: 3\n= 0 By second\n= 1 By minute"] --> A
    B --> E["1. Set Mode\n(1)set --> Logical Device: 0x08\nCR: 0xF6\nBit: 7~0\n= 0x01 Time- out occur after 1\ndecond/minute\n...\n= 0xFF Time- out occur after 255 second/minute"]

SAMPLE CODE:

This code and information is provided "as is" without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose. This program just for MB with Winbond W83267DHG LPC I/O

1. InitWatchdogPin:

outportb(0x2E,0x87);	outportb(0x2E,0x87);	outportb(0x2E,0x87);
outportb(0x2E,0x87);	outportb(0x2E,0x87);	outportb(0x2E,0x87);
outportb(0x2E,0x07);	outportb(0x2E,0x07);	outportb(0x2E,0x07);
outportb(0x2F,0x01);	outportb(0x2F,0x09);	outportb(0x2F,0x09);
outportb(0x2E,0x2D);	outportb(0x2E,0xE0);	outportb(0x2E,0xE2);
outportb(0x2F,byBit);	outportb(0x2F,byBit);	outportb(0x2F,byBit);
outportb(0x2E,0xAA);	outportb(0x2E,0xAA);	outportb(0x2E,0xAA);

outportb(0x2E,0x87);	outportb(0x2E,0x87);
outportb(0x2E,0x87);	outportb(0x2E,0x87);
outportb(0x2E,0x07);	outportb(0x2E,0x07);
outportb(0x2F,0x09);	outportb(0x2F,0x09);
outportb(0x2E,0x30);	outportb(0x2E,0xE1);
outportb(0x2F,byBit);	outportb(0x2F,byBit);
outportb(0x2E,0xAA);	outportb(0x2E,0xAA);

1. Stop Timer

outportb(0x2E,0x87);

outportb(0x2E,0x87);

outportb(0x2E,0x07);

outportb(0x2F,0x08);

outportb(0x2E,0xF6);

outportb(0x2F,byBit);

outportb(0x2E,0xAA);

outportb(0x2E,0x87);

outportb(0x2E,0x87);

outportb(0x2E,0x07);

outportb(0x2F,0x08);

outportb(0x2E,0xF7);

outportb(0x2F,byBit);

outportb(0x2E,0xAA);

outportb(0x2E,0x87);

outportb(0x2E,0x87);

outportb(0x2E,0x07);

outportb(0x2F,0x08);

outportb(0x2E,0x30);

outportb(0x2F,byBit);

outportb(0x2E,0xAA);

3. Set Min/Sec Mode

outportb(0x2E,0x87);

outportb(0x2E,0x87);

outportb(0x2E,0x07);

outportb(0x2F,0x08);

outportb(0x2E,0xF5);

outportb(0x2F,byBit);

outportb(0x2E,0xAA);

4. Start Timer

outportb(0x2E,0x87);

outportb(0x2E,0x87);

outportb(0x2E,0x07);

outportb(0x2F,0x08);

outportb(0x2E,0xF6);

outportb(0x2F,byBit);

outportb(0x2E,0xAA);

Appendix 4 Outline Drawing

P/N : 49.DE201.0010

S/N : 088-099-118