AOC U27B3AF LCD Monitor User Manual

: July 15, 2024
: AOC

Table of Contents

AOC U27B3AF LCD Monitor
Specifications
Product Usage Instructions
FAQ
Safety
Setup
- Stand & Base Setup
- Adaptive-Sync function
Adjusting
- Hotkeys
- OSD Setting
LED Indicator
Troubleshoot
Specification
Pin Assignments
Plug and Play
Read User Manual Online (PDF format)
Download This Manual (PDF format)

AOC U27B3AF LCD Monitor

Specifications

Model: U27B3A
Website: www.aoc.com
Power Source: 100-240V AC, Min. 5A
Power Cable: Included
Connectivity: HDMI, DP Cables included

Product Usage Instructions

Safety
Ensure the monitor is connected to the correct power source as indicated on the label. Unplug during lightning storms or long periods of non-use to prevent damage from power surges. Avoid overloading power strips and extension cords.

Installation
Place the monitor on stable surfaces recommended by the manufacturer. Do not insert objects into monitor slots or spill liquids on it. Maintain adequate ventilation space around the monitor to prevent overheating. Follow manufacturer’s instructions for wall or shelf mounting.

Cleaning
Regularly clean the monitor cabinet with a water-dampened, soft cloth. Disconnect power before cleaning. Do not allow liquid to enter the case.

Other
If you notice any unusual smells, sounds, or smoke from the monitor, immediately disconnect the power and contact a Service Center.

Setup
Contents in Box:

Monitor
Quick Start Guide
Warranty card
Stand
Base
Power Cable
HDMI Cable
DP Cable

FAQ

What should I do if the monitor is emitting a strange smell?
Immediately disconnect the power plug and contact a Service Center for assistance.
Can I clean the monitor with a wet cloth?
Use a water-dampened, soft cloth for cleaning. Ensure the cloth is almost dry and do not allow liquid into the case. Disconnect the power cord before cleaning.
What should I do during a lightning storm?
Unplug the monitor during a lightning storm to protect it from damage due to power surges.

Safety

National Conventions
The following subsections describe national conventions used in this document.

Notes, Cautions, and Warnings
Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These blocks are notes, cautions, and warnings, and they are used as follows:

NOTE: A NOTE indicates important information that helps you make better use of your computer system.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates the potential for bodily harm and tells you how to avoid the problem. Some warnings may appear in alternate formats and may be unaccompanied by an icon. In such cases, the specific presentation of the warning is mandated by regulatory authority.

Power

The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the type of power supplied to your home, consult your dealer or local power company.
Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the monitor from damage due to power surges.
Do not overload power strips and extension cords. Overloading can result in fire or electric shock.
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured receptacles marked between 100-240V AC, Min. 5A.
The wall socket shall be installed near the equipment and shall be easily accessible.

Installation

Do not place the monitor on an unstable cart, stand, tripod, bracket, or table. If the monitor falls, it can injure a person and cause serious damage to this product. Use only a cart, stand, tripod, bracket, or table recommended by the manufacturer or sold with this product. Follow the manufacturer’s instructions when installing the product and use mounting accessories recommended by the manufacturer. A product and cart combination should be moved with care.
Never push any object into the slot on the monitor cabinet. It could damage circuit parts causing a fire or electric shock. Never spill liquids on the monitor.
Do not place the front of the product on the floor.
If you mount the monitor on a wall or shelf, use a mounting kit approved by the manufacturer and follow the kit instructions.
Leave some space around the monitor as shown below. Otherwise, air-circulation may be inadequate hence overheating may cause a fire or damage to the monitor.
To avoid potential damage, for example the panel peeling from the bezel, ensure that the monitor does not tilt downward by more than -5 degrees. If the -5 degree downward tilt angle maximum is exceeded, the monitor damage will not be covered under warranty.
See below the recommended ventilation areas around the monitor when the monitor is installed on the wall or on the stand:

Cleaning

Clean the cabinet regularly with a water-dampened, soft cloth.
When cleaning use a soft cotton or microfiber cloth. The cloth should be damp and almost dry, do not allow liquid into the case.
Please disconnect the power cord before cleaning the product.

Other

If the product is emitting a strange smell, sound or smoke, disconnect the power plug IMMEDIATELY and contact a Service Center.
Make sure that the ventilating openings are not blocked by a table or curtain.
Do not engage the LCD monitor in severe vibration or high impact conditions during operation.
Do not knock or drop the monitor during operation or transportation.
The power cords shall be safety approved. For Germany, it shall be H03VV-F, 3G, 0.75 mm2, or better. For other countries, the suitable types shall be used accordingly.
Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer to maximum increases the earphones and headphones output voltage and therefore the sound pressure level.

Setup

Contents in Box
Not all signal cables will be provided for all countries and regions. Please check with the local dealer or AOC branch office for confirmation.

Stand & Base Setup

Please setup or remove the base following the steps as below.

Setup:

Remove:

Adjusting Viewing Angle

To achieve the best viewing experience, it is recommended that the user can make sure they are able to look at their whole face on the screen, then adjust the monitor’s angle based on personal preference.
Hold the stand so you will not topple the monitor when you change the monitor’s angle.
You are able to adjust the monitor as below:

NOTE:
Do not touch the LCD screen when you change the angle. Touching the LCD screen may cause damage.
WARNING:

1. To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward by more than -5 degrees.
2. Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.

Connecting the Monitor
Cable Connections In Back of Monitor:

HDMI-1
HDMI-2
DP
Earphone
Power

Connect to PC

Connect the power cord to the back of the display firmly.
Turn off your computer and unplug its power cable.
Connect the display signal cable to the video connector on the back of your computer.
Plug the power cord of your computer and your display into a nearby outlet.
Turn on your computer and display.
If your monitor displays an image, installation is complete. If it does not display an image, please refer to Troubleshoot.
To protect equipment, always turn off the PC and LCD monitor before connecting.

Wall Mounting
Preparing to Install An Optional Wall Mounting Arm.

This monitor can be attached to a wall mounting arm you purchase separately. Disconnect power before this procedure. Follow these steps:

Remove the base.
Follow the manufacturer’s instructions to assemble the wall mounting arm.
Place the wall mounting arm onto the back of the monitor. Line up the holes of the arm with the holes in the back of the monitor.
Insert the 4 screws into the holes and tighten.
Reconnect the cables. Refer to the user’s manual that came with the optional wall mounting arm for instructions on attaching it to the wall.

Specification of wall hanger screws M4*(10+X)mm, ( X=Thickness of Wall mount bracket )

Note: VESA mounting screw holes are not available for all models, please check with the dealer or official department of AOC. Always contact manufacturer for wall-mount installation.

Display design may differ from those illustrated.
WARNING:

To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward by more than -5 degrees.
Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.

Adaptive-Sync function

Adaptive-Sync function works with DP/HDMI
Compatible Graphics Card: Recommend list is as the below, also could be checked by visiting www.AMD.com

Graphics Cards

Radeon™ RX Vega series
Radeon™ RX 500 series
Radeon™ RX 400 series
Radeon™ R9/R7 300 series （R9 370/X, R7 370/X, R7 265 except）
Radeon™ Pro Duo (2016)
Radeon™ R9 Nano series
Radeon™ R9 Fury series
Radeon™ R9/R7 200 series (R9 270/X, R9 280/X except)

Processors

AMD Ryzen™ 7 2700U
AMD Ryzen™ 5 2500U
AMD Ryzen™ 5 2400G
AMD Ryzen™ 3 2300U
AMD Ryzen™ 3 2200G
AMD PRO A12-9800
AMD PRO A12-9800E
AMD PRO A10-9700
AMD PRO A10-9700E
AMD PRO A8-9600
AMD PRO A6-9500
AMD PRO A6-9500E
AMD PRO A12-8870
AMD PRO A12-8870E
AMD PRO A10-8770
AMD PRO A10-8770E
AMD PRO A10-8750B
AMD PRO A8-8650B
AMD PRO A6-8570
AMD PRO A6-8570E
AMD PRO A4-8350B
AMD A10-7890K
AMD A10-7870K
AMD A10-7850K
AMD A10-7800
AMD A10-7700K
AMD A8-7670K
AMD A8-7650K
AMD A8-7600
AMD A6-7400K

HDR

It is compatible with input signals in HDR10 format.
The display may automatically activate the HDR function if the player and content are compatible. Please contact the device manufacturer and the content provider for information on the compatibility of your device and content.
Please select “OFF” for the HDR function when you have no need for automatical activation function.

Note:

No special setting is needed for the DisplayPort/HDMI interface in WIN10 versions lower (older) than V1703.
Only the HDMI interface is available and the DisplayPort interface cannot function in WIN10 version V1703.
- The display resolution is set to 3840 x 2160, and HDR is preset to ON. Under these conditions, the screen may slightly dim, indicating HDR has been activated.
- After entering an application, the best HDR effect can be achieved when the resolution is changed to 3840 x 2160 (if available).

Adjusting

Hotkeys

Source/Auto/Exit
Clear Vision/<
Volume/>
Menu/Enter
Power

Menu/Enter
When there is no OSD, Press to display the OSD or confirm the selection.

Power
Press the Power button to turn on the monitor.

Volume
When there is no OSD, Press > Volume button to active volume adjustment bar, Press < or > to adjust volume.

Source/Auto/Exit
When the OSD is closed, press Source/Auto/Exit button will be Source hot key function.

Clear Vision

When there is no OSD, Press the “ <” button to activate Clear Vision.
Use the “ > ” or “>” buttons to select between weak, medium, strong, or off settings. Default setting is always “off”.
Press and hold “ <” button for 5 seconds to activate the Clear Vision Demo, and a message of “Clear Vision Demo: on” will be display on the screen for a duration of 5 seconds. Press Menu or Exit button, the message will disappear. Press and hold “ <” button for 5 seconds again, Clear Vision Demo will be off.

Clear Vision function provides the best image viewing experience by converting low resolution and blurry images into clear and vivid images.

OSD Setting

Basic and simple instruction on the control keys.

Press the Menu-button to activate the OSD window.
Press Left or Right to navigate through the functions. Once the desired function is highlighted, press the Menu-button to activate it, press Left or Right to navigate through the sub-Menu functions. Once the desired function is highlighted, press Menu-button to activate it.
Press Left or to change the settings of the selected function. Press to exit. If you want to adjust any other function, repeat steps 2-3.
OSD Lock Function: To lock the OSD, press and hold the Menu-button while the monitor is off and then press power button to turn the monitor on. To unlock the OSD – press and hold the Menu-button while the monitor is off and then press power button to turn the monitor on.
Notes:
If the product has only one signal input, the item of “Input Select” is disable to adjust.
ECO modes (except Standard mode), DCR, DCB mode and Picture Boost, for these four states that only one state can exist.

Luminance

Note:
When “HDR Mode” is set to “non-off”, the items “Contrast”, “ECO”, “Gamma” cannot be adjusted.

Color Setup

| ****

Color Temp.

| Warm| Recall Warm Color Temperature from EEPROM.
---|---|---|---
Normal| Recall Normal Color Temperature from EEPROM.
Cool| Recall Cool Color Temperature from EEPROM.
User| Restore Color Temperature from EEPROM.
Color Gamut| Panel Native| Recall Panel Native Color Temperature from EEPROM.
sRGB| Recall SRGB Color Temperature from EEPROM.
LowBlue Mode| Reading/ Office

/ Internet /

Multimedia / Off

| Decrease blue light wave by controlling color temperature.
Red| 0-100| Red gain from Digital-register.
Green| 0-100| Green gain from Digital-register.
Blue| 0-100| Blue gain from Digital-register.

DCB Mode

Note:
When “HDR Mode” under “Luminance” is set to “non-off”, all items under “Color Setup” cannot be adjusted.

Picture Boost

| Bright Frame| on or off| Disable or Enable Bright Frame
---|---|---|---
Frame Size| 14-100| Adjust Frame Size
Brightness| 0-100| Adjust Frame Brightness
Contrast| 0-100| Adjust Frame Contrast
H. position| 0-100| Adjust Frame horizontal Position
V. position| 0-100| Adjust Frame vertical Position

Note:

Adjust the brightness, contrast, and position of the Bright Frame for better viewing experience.
When “HDR Mode” under “Luminance” is set to “non-off”, all items under “Picture Boost” cannot be adjusted.

OSD Setup

| Language| | Select the OSD language
---|---|---|---
Timeout| 5-120| Adjust the OSD Timeout
DP Capability| 1.1/1.2/1.4| Please be noted that only DP1.2 support G-SYNC/

Adaptive-Sync function

more than 1hrs

Game Setting

| ****

Game Mode

| Off| No optimization by Smart image game
---|---|---|---
FPS| For playing FPS (First Person Shooters) games.

Improves black level in dark theme.

RTS| For playing RTS (Real Time Strategy). Improves the

image quality.

Racing| For playing Racing games, Provides fastest

response time and high color saturation.

Gamer 1| User’s preference settings saved as Gamer 1.
Gamer 2| User’s preference settings saved as Gamer 2.
Gamer 3| User’s preference settings saved as Gamer 3.

Shadow Control

| ****

0-100

| Shadow Control Default is 50, then end-user can

adjust from 50 to 100 or 0 to increase/decrease contrast for clear picture.

1. If picture is too dark to be saw the detail clearly, adjusting from 50 to100 for clear picture.

2. If picture is too white to be saw the detail

clearly, adjusting from 50 to0 for clear picture

Low Input Lag| On/Off| Turn off frame buffer to decrease input lag
Game Color| 0-20| Game Color will provide 0-20 level for adjusting

saturation to get better picture.

Overdrive

| Off| ****

Adjust the response time.

Weak
Medium
Strong

Adaptive-Sync

| ****

On or Off

| Disable or Enable Adaptive-Sync.c

Adaptive-Sync Run Reminder: When the Adaptive- Sync feature is enabled, there may be flashing in some game environments.

Frame Counter

| Off / Right-up / Right-

Down / Left-Down / Left-Up

| ****

Display V frequency on the corner selected

Dial Point

| ****

On or Off

| The“Dial Point”function places an aiming indicator

in the

center of screen for helping gamers to play First Person

Shooter (FPS) games with an accurate and precise

aiming.

Note:
When “HDR Mode” under “Luminance” is set to “non-off”, the items “Game Mode”, “Shadow Control”, “Game Color” cannot be adjusted.

Extra

| Input Select| | Select Input Signal Source
---|---|---|---
Auto Config.| Yes or No| Auto adjust the picture to default. (For D-SUB

models)

Off timer| 0-24hrs| Select DC off time

Image Ratio

| Wide| ****

Select image ratio for display.

4:3
1:1
Movie1
Movie2
DDC/CI| Yes or No| Turn ON/OFF DDC/CI Support
Reset| Yes or No| Reset the menu to default

Exit

****	**** Exit		Exit the main OSD

LED Indicator

Status	LED Color
Full Power Mode	White
Active-off Mode	Orange

Troubleshoot

Problem & Question	Possible Solutions
Power LED Is Not ON	Make sure the power button is ON and the Power Cord

is properly connected to a grounded power outlet and to the monitor.

No image on the screen

| Is the power cord connected properly?

Check the power cord connection and power supply. Is the video cable connected correctly?

(Connected using the VGA cable) Check the VGA cable connection. (Connected using the HDMI cable) Check the HDMI cable connection. (Connected using the DP cable) Check the DP cable connection.

VGA/HDMI/DP input is not available on every model.

If the power is on, reboot the computer to see the initial screen (the login screen.)

If the initial screen (the login screen) appears, boot the computer in the applicable mode (the safe mode for Windows 7/8/10) and then change the frequency of the video card.

(Refer to the Setting the Optimal Resolution)

If the initial screen (the login screen) does not appear, contact the Service

Center or your dealer.

Can you see “Input Not Supported” on the screen?

You can see this message when the signal from the video card exceeds the maximum resolution and frequency that the monitor can handle properly. Adjust the maximum resolution and frequency that the monitor can handle properly.

Make sure the AOC Monitor Drivers are installed.

Picture Is Fuzzy & Has Ghosting Shadowing Problem

| Adjust the Contrast and Brightness Controls.

Press hot-key (AUTO) to auto-adjust.

Make sure you are not using an extension cable or switch box. We recommend plugging the monitor directly to the video card output connector on the back.

Picture Bounces, Flickers Or Wave Pattern Appears In The Picture| Move electrical devices that may cause electrical interference as far away from

the monitor as possible.

Use the maximum refresh rate your monitor is capable of at the resolution you are using.

Monitor Is Stuck In Active Off-Mode”

| The Computer Power Switch should be in the ON position.

The Computer Video Card should be snugly fitted in its slot.

Make sure the monitor’s video cable is properly connected to the computer. Inspect the monitor’s video cable and make sure no pin is bent.

Make sure your computer is operational by hitting the CAPS LOCK key on the keyboard while observing the CAPS LOCK LED. The LED should either turn ON

or OFF after hitting the CAPS LOCK key.

Missing one of the primary colors (RED, GREEN, or BLUE)| Inspect the monitor’s video cable and make sure that no pin is damaged. Make sure the monitor’s video cable is properly connected to the computer.
Screen image is not centered or sized properly| Adjust H-Position and V-Position or press hot-key (AUTO).
Picture has color defects (white does not look white)| Adjust RGB color or select desired color temperature.
Horizontal or vertical disturbances on the screen| Use Windows 7/8/10 shut-down mode to adjust CLOCK and FOCUS.

Press hot-key (AUTO) to auto-adjust.

Regulation & Service

| Please refer to Regulation & Service Information which is in the CD manual or www.aoc.com (to find the model you purchase in your country and to find Regulation & Service Information in Support page.

Specification

General Specification

Panel

| Model name| U27B3A
---|---|---
Driving system| TFT Color LCD
Viewable Image Size| 68.5cm diagonal
Pixel pitch| 0.1554(H)mm x 0.1554(V) mm
Separate Sync| H/V TTL
Display Color| 1.07B Colors

Others

Power Consumption

Environmental

Preset Display Modes

STANDARD| RESOLUTION(+/- 1Hz)| HORIZONTAL FREQUENCY(kHz)| VERTICAL FREQUENCY(Hz)
---|---|---|---

VGA

| 640×480@60Hz| 31.469| 59.94
640×480@72Hz| 37.861| 72.809
640×480@75Hz| 37.5| 75

SVGA

| 800×600@56Hz| 35.156| 56.25
800×600@60Hz| 37.879| 60.317
800×600@72Hz| 48.077| 72.188
800×600@75Hz| 46.875| 75

XGA

| 1024×768@60Hz| 48.363| 60.004
1024×768@70Hz| 56.476| 70.069
1024×768@75Hz| 60.023| 75.029

SXGA

| 1280×1024@60Hz| 63.981| 60.02
1280×1024@75Hz| 79.976| 75.025

WXGA+

| 1440×900@60Hz| 55.935| 59.887
1440×900@60Hz| 55.469| 59.901

WSXGA

| 1680×1050@60Hz| 65.29| 59.954
1680×1050@60Hz| 64.674| 59.883
FHD| 1920×1080@60Hz| 67.5| 60
QHD| 2560×1440@60Hz| 88.787| 59.951
***| 1920×2160@60Hz| 133.293| 59.988

UHD

| 3840×2160@30Hz| 67.5| 30
3840×2160@50Hz| 112.5| 50
3840×2160@60Hz| 135| 60
IBM MODES
DOS| 720×400@70Hz| 31.469| 70.087
MAC MODES
VGA| 640×480@67Hz| 35| 66.667
SVGA| 832×624@75Hz| 49.725| 74.551
XGA| 1024×768@75Hz| 60.241| 74.927

Note: According to the VESA standard, there may be a certain error (+/-1Hz) when calculating the refresh rate (field frequency) of different operating systems and graphics cards. In order to improve compatibility, the nominal refresh rate of this product has been rounded off. Please refer to the actual product.

Pin Assignments

19-Pin Color Display Signal Cable

Pin No.| Signal Name| Pin No.| Signal Name| Pin No.| Signal Name
---|---|---|---|---|---
1.| TMDS Data 2+| 9.| TMDS Data 0-| 17.| DDC/CEC Ground
2.| TMDS Data 2 Shield| 10.| TMDS Clock +| 18.| +5V Power
3.| TMDS Data 2-| 11.| TMDS Clock Shield| 19.| Hot Plug Detect
4.| TMDS Data 1+| 12.| TMDS Clock-| |
5.| TMDS Data 1Shield| 13.| CEC| |
6.| TMDS Data 1-| 14.| Reserved (N.C. on device)| |
7.| TMDS Data 0+| 15.| SCL| |
8.| TMDS Data 0 Shield| 16.| SDA| |

19-Pin Color Display Signal Cable

Pin No.| Signal Name| Pin No.| Signal Name| Pin No.| Signal Name
---|---|---|---|---|---
1.| TMDS Data 2+| 9.| TMDS Data 0-| 17.| DDC/CEC Ground
2.| TMDS Data 2 Shield| 10.| TMDS Clock +| 18.| +5V Power
3.| TMDS Data 2-| 11.| TMDS Clock Shield| 19.| Hot Plug Detect
4.| TMDS Data 1+| 12.| TMDS Clock-| |
5.| TMDS Data 1Shield| 13.| CEC| |
6.| TMDS Data 1-| 14.| Reserved (N.C. on device)| |
7.| TMDS Data 0+| 15.| SCL| |
8.| TMDS Data 0 Shield| 16.| SDA| |

Plug and Play

Plug & Play DDC2B Feature

This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
The DDC2B is a bi-directional data channel based on the I2C protocol. The host can request EDID information over the DDC2B channel.