National Conventions ................................................................................................................................................ 1
Power ........................................................................................................................................................................ 2
Other ......................................................................................................................................................................... 5
Contents in Box ......................................................................................................................................................... 6
Setup Stand & Base .................................................................................................................................................. 7
Connecting the Monitor ............................................................................................................................................. 9
Color Setup .................................................................................................................................................. 15
Game Setting ............................................................................................................................................... 19
Extra ............................................................................................................................................................ 20
LED Indicator .......................................................................................................................................................... 22
General Specication .............................................................................................................................................. 24
Plug and Play .......................................................................................................................................................... 27
i
Safety
National Conventions
The following subsections describe notational 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:
CAUTION:
problem.
WARNING:
may appear in alternate formats and may be unaccompanied by an icon. In such cases, the specic presentation of the
warning is mandated by regulatory authority.
A NOTE indicates important information that helps you make better use of your computer system.
A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the
A WARNING indicates the potential for bodily harm and tells you how to avoid the problem. Some warnings
1
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.
The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will t
only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an
electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of
the grounded plug.
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 re or electric shock.
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate congured
receptacles marked between 100-240V AC, Min. 5A.
The wall socket shall be installed near the equipment and shall be easily accessible.
2
Installation
Installed with stand
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 re or electric
shock. Never spill liquids on the monitor.
Do not place the front of the product on the oor.
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 re 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:
Installed with stand
12 inches
30cm
4 inches
10cm
4 inches
10cm
Leave at lease this
space around the set
4 inches
10cm
3
Cleaning
Clean the cabinet regularly with cloth. You can use soft-detergent to wipe out the stain, instead of strong-detergent
which will cauterize the product cabinet.
When cleaning, make sure no detergent is leaked into the product. The cleaning cloth should not be too rough as it
will scratch the screen surface.
Please disconnect the power cord before cleaning the product.
4
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.
IThe 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.
IExcessive 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.
5
Setup
*
*
Monitor
CD Manual
Warranty CardStandBase
Power CableHDMI CableUSB CableDP Cable
*
*
*
Contents in Box
Not all signal cables will be provided for all countries and regions. Please check with the local dealer or AOC branch
ofce for conrmation.
6
Setup Stand & Base
Please setup or remove the base following the steps as below.
Setup:
Remove:
7
Adjusting Viewing Angle
35
130
For optimal viewing it is recommended to look at the full face of the monitor, then adjust the monitor’s angle to your own
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. It may cause damage or break the LCD screen.
Warning
1. To avoid potential screen damage, such as panel peeling, ensure that the monitor does not tilt downward by more
2. Do not press the screen while adjusting the angle of the monitor. Grasp only the bezel.
:
than -5 degrees.
8
Connecting the Monitor
10 7 53
4 218
9 6
Cable Connections In Back of Monitor and Computer:
1. Power
2. DP
3. HDMI-1
4. HDMI-2
5. USB-PC(USB upstream)
6. USB3.2 Gen1
7. USB3.2 Gen1+charging
8. Earphone
9. USB3.2 Gen1
10. USB3.2 Gen1
Connect to PC
1. Connect the power cord to the back of the display rmly.
2. Turn off your computer and unplug its power cable.
3. Connect the display signal cable to the video connector on the back of your computer.
4. Plug the power cord of your computer and your display into a nearby outlet.
5. Turn on your computer and display.
If your monitor displays an image, installation is complete. If it does not display an image, please refer Troubleshooting.
To protect equipment, always turn off the PC and LCD monitor before connecting.
9
Wall Mounting
-5°
0°90°
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:
1. Remove the base.
2. Follow the manufacturer’s instructions to assemble the wall mounting arm.
3. 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.
4. 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.
Noted: VESA mounting screw holes are not available for all models, please check with the dealer or ofcial department of
AOC.
* Display design may differ from those illustrated.
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.
10
Adjusting
12345
Hotkeys
1Source/Exit
2Clear Vision/<
3Volume/>
4Menu/Enter
5Power
Power
Press the power key to turn on/off the monitor.
Menu/Select
Activate the OSD menu or function adjustment conrmation.
Volume / increase
When the OSD menu is closed, press the “>” key to open the volume adjustment bar, and press the “<” or “>” key to
adjust the headphone output volume.
Source switching/exit
When the OSD menu is off, press this key to activate the signal source switching function, press this key continuously to
select the signal source displayed in the information bar, and press the menu key to adjust to the selected signal source.
When the OSD menu is active, this button acts as an exit key (to exit the OSD menu)
11
Clear Vision
1. When there is no OSD, Press the “<” button to activate Clear Vision.
2. Use the “<” or “>” buttons to select between weak, medium, strong, or off settings. Default setting is always “off”.
3. 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.
Off
Clear Vision
Clear Vision DemoOn or OffDisable or Enable Demo
Weak
Adjust the Clear Vision
Medium
Strong
12
OSD Setting
Luminance
Color SetupPicture BoostOSD SetupExitExtra
Contrast50
Brightness90
Eco ModeStandard
GammaGamma 1
DCROff
HDR ModeOff
Game Setting
PIP Setting
PIP
Basic and simple instruction on the control keys.
1). Press the
2). Press < or > to navigate through the functions. Once the desired function is highlighted, press the
MENU-button
to activate the OSD window.
MENU-button
to
activate it, press < or > to navigate through the sub-menu functions. Once the desired function is highlighted, press
MENU-button
3). Press < or > to change the settings of the selected function. Press
to activate it.
AUTO–button
to exit. If you want to adjust any
other function, repeat steps 2-3.
4). OSD Lock Function: To lock the OSD, press and hold the
power button
and then press
to turn the monitor on. To un-lock the OSD - press and hold the
power button
to turn the monitor on.
MENU-button
while the monitor is off and then press
MENU-button
while the monitor is off
Notes:
1). If the product has only one signal input, the item of “Input Select” is disable to adjust.
2). If the screen size of the product is 4:3 or the input signal resolution is the native resolution, then the item “Image
Ratio” is invalid.
3). The four states of ECO mode (except standard mode), DCR, DCB mode and window highlight can only display one
state at a time.
13
Luminance
Luminance
Color SetupPicture BoostOSD SetupExitExtra
Contrast50
Brightness90
Eco ModeStandard
GammaGamma 1
DCROff
HDR ModeOff
Game Setting
PIP Setting
PIP
Contrast 0-100 Contrast from Digital-register.
Brightness 0-100 Backlight Adjustment
StandardStandard Mode
TextText Mode
InternetInternet Mode
GameGame Mode
Eco mode
MovieMovie Mode
SportsSports Mode
ReadingReading Mode
UniformityUniformity Mode
Gamma1Adjust to Gamma 1
Gamma
Gamma2Adjust to Gamma 2
Gamma3Adjust to Gamma 3
OffDisable dynamic contrast ratio
DCR
OnEnable dynamic contrast ratio
OFF
HDR Picture
HDR Mode
Adjust HDR Mode.
HDR Movie
HDR Game
Note:
When “HDR Mode” is set to a non-off state, “Contrast”, “ECO Mode”, and “Gamma” items cannot be adjusted.
14
Color Setup
Picture BoostOSD SetupExitExtra
Luminance
Red50
Green50
Blue50DCB DemoOff
Color Temp.Warm
DCB ModeOff
Color Setup
Game Setting
LowBlue ModeOff
PIP Setting
PIP
Warm Recall Warm Color Temperature from EEPROM.
Normal Recall Normal Color Temperature from EEPROM.
Cool Recall Cool Color Temperature from EEPROM.
Color Temp.
sRGB Recall SRGB Color Temperature from EEPROM.
RedRed Gain from Digital-register
User
GreenGreen Gain Digital-register.
BlueBlue Gain from Digital-register
Full Enhance on or offDisable or Enable Full Enhance Mode
Nature Skin on or offDisable or Enable Nature Skin Mode
DCB Mode
Green Field on or offDisable or Enable Green Field Mode
Sky-blue on or offDisable or Enable Sky-blue Mode
Auto Detect on or offDisable or Enable AutoDetect Mode
OFFon or offDisable or Enable OFF Mode
DCB Demoon or offDisable or Enable Demo
Red0-100Red gain from Digital-register.
Green0-100Green gain from Digital-register.
Blue0-100Blue gain from Digital-register.
Multimedia
Internet
LowBlue
Mode
Ofce
Decrease blue light wave by controlling color
temperature
Reading
Off
Note:
When “HDR Mode” under “Brightness” is set to a non-off state, all items under “Color Setup” cannot be adjusted.
15
Picture Boost
OSD SetupExitExtra
Luminance
Brightness50
Contrast50
H. Position0
V. Position0
Bright Frameoff
Frame Size14
Picture Boost
Color Setup
Game Setting
PIP Setting
PIP
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. position0-100 Adjust Frame vertical Position
Note:
1). For a better viewing experience, adjust the brightness, contrast, and position of the brightening.
2). When the „HDR Mode“ under „Brightness“ is set to a non-off state, all items under „Window Brightening“ cannot be
adjusted.
16
OSD Setup
ExitExtra
Luminance
Color Setup
H. Position50
V. Position0
Transparence25
LanguageEnglish
Timeout10
DP Capability1.2
Break ReminderOff
OSD Setup
Picture Boost
Game Setting
PIP Setting
PIP
50
Volume
Language Select the OSD language
Timeout 5-120Adjust the OSD Timeout
DP Capability1.1/1.2
If the DP video content supports DP1.2, please select
DP1.2 for DP Capability; otherwise, please select DP1.1
H. Position 0-100 Adjust the horizontal position of OSD
V. Position 0-100 Adjust the vertical position of OSD
Volume0-100Volume Adjustment.
Transparence0-100Adjust the transparence of OSD
Break Reminderon or off
Break reminder if the user continuously work for more
than 1hrs
17
PIP Setting
Picture BoostOSD Setup
PIP Setting
ExitExtra
PIP
Luminance
Size
Position
AudioSub SourceDP
PIPOffSmallSwapOff
Main Source
HDMI1
Off
Right-up
Color Setup
Game Setting
PIP SettingOFF / PIP / PBPDisable or Enable PIP or PBP.
Main Source
Sub Source
HDMI1 、HDMI2 、DP、
USB-C
HDMI1 、HDMI2 、DP、
USB-C
Select main screen source.
Select sub screen source.
SizeSmall / Middle / LargeSelect screen size.
Right-up
PIP
Position
Audio
Swap
Right-down
Set the screen location.
Left-up
Left-down
On: PIP Audio
Disable or Enable Audio Setup.
Off: Main Audio
On: Swap
Swap the screen source.
Off: non action
18
Game Setting
Picture BoostOSD SetupExitExtra
Luminance
Shadow Control
Game ModeOff
Overdrive
Off
Low Input Lag
Off
Color Setup
Game Setting
50
Game Color
10
Adaptive-Sync
Off
Frame Counter
Off
PIP Setting
PIP
For playing FPS (rst Person Shooters) games.
Improves dark theme black level details.
For playing RTS (Real Time Strategy). Improves the
image quality.
For playing Racing games, Provides fastest response
time and high color saturation.
Game Mode
FPS
RTS
Racing
Gamer 1User’s preference settings saved as Gamer 1.
Gamer 2User’s preference settings saved as Gamer 2.
Gamer 3User’s preference settings saved as Gamer 3.
offNo optimization by Smart image game
Shadow Control Default is 50, then end-user can adjust
from 50 to 100 or 0 to increase contrast for clear picture.
Shadow Control0-100
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 LagOn/OffTurn off frame buffer to decrease input lag
Game Color0-20
Game Color will provide 0-20 level for adjusting
saturation to get better picture.
Weak
Medium
Overdrive
Adjust the response time.
Strong
Off
Adaptive-SyncOn/OffAdjust the Adaptive-Sync.
Off / Right-up /
Frame Counter
Right-Down / Left-
Display V frequency on the corner selected
Down / Left-Up
Note:
When the “HDR Mode” under “Brightness” is set to a non-off state, the “Game Mode”, “Shadow Control、Game Color”
items under “Game Setting” cannot be adjusted.
19
Extra
Picture BoostOSD SetupExit
Luminance
Color Setup
Off Timer00
Input SelectAuto
ResetNo
Image RatioWide
DDC/CIYes
Resolution : 3840(H)X2160(V)
H. Frequency : 135KHz
V. Frequency : 60Hz
Extra
Game Setting
PIP Setting
PIP
Input SelectSelect Input Signal Source
Off timer0-24hrsSelect DC off time
Wide
4:3
1:1
Select image ratio for display.
17” (4:3)
19” (4:3)
19” (5:4)
Image Ratio
19”W (16:10)
21.5”W (16:9)
22”W (16:10)
23”W (16:9)
23.6”W (16:9)
24”W (16:9)
27”W (16:9)
DDC/CIyes or noTurn ON/OFF DDC/CI Support
Reset
yes or no
ENERGY STAR® or no
Reset the menu to default.
(ENERGY STAR® available for selective
models.)
20
Exit
Picture BoostOSD Setup
Luminance
Color Setup
Exit
Extra
Game Setting
PIP Setting
PIP
Exit Exit the main OSD
21
LED Indicator
StatusLED Color
Full Power ModeWhite
Active-off ModeOrange
22
Troubleshoot
Problem & Question
Power LED Is Not ON
No images on the screen
Picture Is Fuzzy & Has
Ghosting Shadowing Problem
Picture Bounces, Flickers Or
Wave Pattern Appears In The
Picture
Monitor Is Stuck In Active OffMode”
Missing one of the primary
colors (RED, GREEN, or
BLUE)
Screen image is not centered
or sized properly
Picture has color defects
(white does not look white)
Possible Solutions
Make sure the power button is ON and the Power Cord is properly
connected to a grounded power outlet and to the monitor.
Is the power cord connected properly?
Check the power cord connection and power supply.
Is the 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), which can be seen.
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.
Adjust the Contrast and Brightness Controls.
Press 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.
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.
The Computer Power Switch should be in the ON position.
The Computer Video Card should be snugly tted 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.
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.
Adjust H-Position and V-Position or press hot-key (AUTO).
Adjust RGB color or select desired color temperature.
Horizontal or vertical
disturbances on the screen
Regulation & Service
Use Windows 7/8/10 shut-down mode to adjust CLOCK and FOCUS.
Press to auto-adjust.
Please refer to Regulation & Service Information which is in the CD manual
or www.aoc.com (to nd the model you purchase in your country and to nd
Regulation & Service Information in Support page.
23
Specification
General Specification
Model nameU28P2A
Panel
Others
Physical
Characteristics
Environmental
Driving system TFT Color LCD
Viewable Image Size70.9 cm diagonal
Pixel pitch
Horizontal scan range 30k-140kHz
Horizontal scan Size(Maximum)620.93mm
Vertical scan range 40-60Hz
Vertical Scan Size(Maximum)341.28mm
Optimal preset resolution
Max resolution3840x2160@60Hz
Plug & Play VESA DDC2B/CI
Power Source 100-240V~, 50/60Hz, 1.5A
Power Consumption
Connector TypeHDMI×2、DP、USB3.2 Gen1x4、 USB upstream、Earphone
Signal Cable Type
Temperature
Humidity
Altitude
0.16mm(H) x 0.16mm(V)
3840x2160@60Hz
Typical(Brightness = 90,Contrast = 50) 45W
Max. (brightness = 100, contrast =100)≤100.5W
Standby mode
Detachable
Operating 0°~ 40°
Non-Operating -25°~ 55°
Operating 10% ~ 85% (non-condensing)
Non-Operating 5% ~ 93% (non-condensing)
Operating 0~ 5000 m (0~ 16404ft )
Non-Operating 0~ 12192m (0~ 40000ft )
≤
0.5W
24
Preset Display Modes
STANDARDRESOLUTION
VGA640x480@60Hz31.46959.94
VGA640x480@67Hz3566.667
VGA640x480@72Hz37.86172.809
VGA640x480@75Hz37.575
DOS MODE720x400@70Hz31.46970.087
SVGA800x600@56Hz35.15656.25
SVGA800x600@60Hz37.87960.317
SVGA800x600@72Hz48.07772.188
SVGA800x600@75Hz46.87575
MAC MODE832x624@75Hz49.72574.551
XGA1024x768@60Hz48.36360.004
XGA1024x768@70Hz56.47670.069
XGA1024x768@75Hz60.02375.029
HD1280x960@60Hz6060
HD1280x720@60Hz44.77259.885
SXGA1280x1024@60Hz63.98160.02
HORIZONTAL
FREQUENCY(kHz)
VERTICAL
FREQUENCY(Hz)
SXGA1280x1024@75Hz79.97675.025
WXGA+1440x900@60Hz55.93559.887
WSXGA1680x1050@60Hz64.67459.954
FHD1920x1080@60Hz67.560
***1920x2160@60Hz133.29359.988
QHD2560x1440@60Hz88.78659.9
UHD3840x2160@30Hz67.530
UHD3840x2160@60Hz133.3260
25
Pin Assignments
19-Pin Color Display Signal Cable
Pin No. Signal NamePin No. Signal NamePin No. Signal Name
1.TMDS Data 2+9.TMDS Data 0-17.DDC/CEC Ground
2.TMDS Data 2 Shield10.TMDS Clock +18.+5V Power
3.TMDS Data 2-11 .TMDS Clock Shield19.Hot Plug Detect
4.TMDS Data 1+12.TMDS Clock-
5.TMDS Data 1Shield13.CEC
6.TMDS Data 1-14.Reserved (N.C. on device)
7.TMDS Data 0+15.SCL
8.TMDS Data 0 Shield16.SDA
20-Pin Color Display Signal Cable
Pin No.Signal NamePin No.Signal Name
1ML_Lane 3 (n)11GND
2GND12ML_Lane 0 (p)
3ML_Lane 3 (p)13CONFIG1
4ML_Lane 2 (n)14CONFIG2
5GND15AUX_CH(p)
6ML_Lane 2 (p)16GND
7ML_Lane 1 (n)17AUX_CH(n)
8GND18Hot Plug Detect
9ML_Lane 1 (p)19Return DP_PWR
10ML_Lane 0 (n)20DP_PWR
26
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.
27
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