LCD Monitor
User Manual
U27P2CAwww.aoc.com©2021 AOC.All Rights ReservedTM1

Safety.................................................................................................................................................................................... 1
National Conventions................................................................................................................................................. 1
Power......................................................................................................................................................................... 2
Installation.................................................................................................................................................................. 3
Cleaning..................................................................................................................................................................... 4
Other.......................................................................................................................................................................... 5
Setup..................................................................................................................................................................................... 6Contents in Box.......................................................................................................................................................... 6
Setup Stand & Base................................................................................................................................................... 7
Adjusting Viewing Angle............................................................................................................................................. 8Connecting the Monitor.............................................................................................................................................. 9
Adjusting.............................................................................................................................................................................. 10
Hotkeys.................................................................................................................................................................... 10
OSD Setting............................................................................................................................................................. 12
Luminance.................................................................................................................................................... 13
Color Setup................................................................................................................................................... 14
Picture Boost................................................................................................................................................ 15
OSD Setup.................................................................................................................................................... 16
PIP Setting.................................................................................................................................................... 17
Game Setting................................................................................................................................................ 18
Extra............................................................................................................................................................. 19
Exit................................................................................................................................................................ 20
LED Indicator........................................................................................................................................................... 21
Troubleshoot........................................................................................................................................................................ 22
Specification........................................................................................................................................................................ 23
General Specification............................................................................................................................................... 23
Preset Display Modes.............................................................................................................................................. 24
Pin Assignments....................................................................................................................................................... 25
Plug and Play........................................................................................................................................................... 26i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: 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 thewarning is mandated by regulatory authority.

1Power
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of thetype 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 fit
only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have anelectrician 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 themonitor 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.

2Installation
Do not place the monitor on an unstable cart, stand, tripod, bracket, or table. If the monitor falls, it can injure aperson 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.
See below the recommended ventilation areas around the monitor when the monitor is installed on the wall or on thestand:
Installed with standInstalled with stand
12 inches
30cm

4 inches
10cm

4 inches
10cm

Leave at lease thisspace around the set

3

4 inches
10cm

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 othercountries, the suitable types shall be used accordingly.
IExcessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the equalizer tomaximum increases the earphones and headphones output voltage and therefore the sound pressure level.

5SetupContents in Box

Monitor**Warranty Card

CD Manual*Power Cable

USB C-C Cable

Stand

Base

*

*

*

HDMI Cable

USB Cable

DP Cable

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

6

Setup Stand & Base
Please setup or remove the base following the steps as below.
Setup:

Remove:7

Adjusting Viewing Angle
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.

8Connecting the Monitor
Cable Connections In Back of Monitor and Computer:

9

10

5 7
1

3 2 4 6 8

1. Power
2. DP
3. HDMI
4. USB-C
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 firmly.
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Adjusting
Hotkeys1

21

Source/Exit

2

Clear Vision/<

3

Volume/>4

Menu/Enter

5

Power

3

4

5

Power
Press the power key to turn on/off the monitor.
Menu/SelectActivate the OSD menu or function adjustment confirmation.
Volume / increase
When the OSD menu is closed, press the “>” key to open the volume adjustment bar, and press the “<” or “>” key toadjust 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)

10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

Weak
MediumAdjust the Clear Vision

StrongClear Vision Demo

On or Off

Disable or Enable Demo

11

OSD Setting
Basic and simple instruction on the control keys.

PIP
Luminance

Color Setup

Picture BoostPIP Setting

OSD Setup

Contrast

50

Gamma

Gamma 1Brightness

90

DCR

Off

HDR ModeOff

Eco ModeStandard

Game Setting

Extra

Exit

1). Press the MENU-button to activate the OSD window.
2). Press < or > to navigate through the functions. Once the desired function is highlighted, press the MENU-button toactivate it, press < or > to navigate through the sub-menu functions. Once the desired function is highlighted, press
MENU-button to activate it.
3). Press < or > to change the settings of the selected function. Press AUTO–button to exit. If you want to adjust anyother function, repeat steps 2-3.
4). 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 un-lock the OSD - press and hold the MENU-button while the monitor is off
and then press power button to turn the monitor on.
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.

12Luminance
PIP
Luminance

Color Setup

Picture BoostPIP Setting

OSD Setup

Contrast

50

Gamma

Gamma 1Brightness

90

DCR

Off

HDR ModeOff

Eco ModeStandard

Game Setting

Contrast

0-100

Contrast from Digital-register.

Brightness

0-100

Backlight Adjustment

Standard

Standard Mode

Text

Text Mode

Internet

Internet Mode

Game

Game Mode

Movie

Movie Mode

SportsSports Mode

Reading

Reading Mode

Uniformity

Uniformity Mode

Gamma1

Adjust to Gamma 1

Gamma2Adjust to Gamma 2

Gamma3Adjust to Gamma 3

Off

Disable dynamic contrast ratio

On

Enable dynamic contrast ratio

Eco mode

Gamma

DCR

Extra

Exit

OFF
HDR Mode

HDR Picture

Adjust HDR Mode.

HDR Movie
HDR Game

Note:
When “HDR Mode” is set to a non-off state, “Contrast”, “Brightness Scene Mode”, and “Gamma” items cannot be
adjusted.

13

Color Setup
PIP
PIP Setting

Color Setup

Picture Boost

Color Temp.

Warm

Red

50

DCB Mode

Off

Green

50

DCB Demo

Off

Blue

50

Color Temp.

OSD Setup

Game Setting

Extra

Exit

LowBlue Mode

Off

Warm

Recall Warm Color Temperature from EEPROM.

NormalRecall Normal Color Temperature from EEPROM.

Cool

Recall Cool Color Temperature from EEPROM.

sRGB

Recall SRGB Color Temperature from EEPROM.
RedRed Gain from Digital-register

Green

Green Gain Digital-register.

Blue

Blue Gain from Digital-register

Full Enhanceon or off

Disable or Enable Full Enhance Mode

Nature Skinon or off

Disable or Enable Nature Skin Mode

Green Fieldon or off

Disable or Enable Green Field Mode

Sky-blueon or off

Disable or Enable Sky-blue Mode

Auto Detecton or off

Disable or Enable AutoDetect ModeOFFon or off

Disable or Enable DCB ModeDCB Demoon or off

Disable or Enable Demo

Red

0-100

Red gain from Digital-register.

Green

0-100

Green gain from Digital-register.

Blue

0-100

Blue gain from Digital-register.

User

DCB Mode

Luminance

Multimedia
LowBlue
Mode

Internet

Decrease blue light wave by controlling color
temperature

OfficeReading
Off

Note:
When “HDR Mode” under “Brightness” is set to a non-off state, all items under “Color Settings” cannot be adjusted.

14

Picture Boost
PIP
Picture Boost
Bright FramePIP Setting

OSD Setup
off

Frame Size

14

Extra

Game Setting

Exit

Luminance

Color Setup

Brightness

50

H. Position

0

Contrast

50

V. Position0

Bright Frameon or off

Disable or Enable Bright Frame

Frame Size

14-100Adjust 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: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.

15

OSD Setup
PIP
OSD Setup

PIP Setting

Language

EnglishTimeout

10

DP Capability

Extra

Game Setting

1.2

Exit

Luminance

Color Setup

Picture Boost

H. Position

50

Transparence

V. Position0

Break Reminder

Off

USB Selection

Auto

USB

LanguageOff

25

Select the OSD language

Timeout

5-120

Adjust the OSD Timeout

DP Capability

1.1/1.2

If the DP video content supports DP1.2, please selectDP1.2 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

USB*

3.2Gen1 / 2.0 / Off

For model need to turn on/off USB power during powersavingTransparence

0-100

Adjust the transparence of OSD

Break Reminder

on or off

USB Selection

Auto / USB C / USBup

Break reminder if the user continuously work for morethan 1hrs*Auto : switch with display input source*USB C / USB up : fix up stream not change with input
sourceNote:*: USB C(DP Alt) signal input, and “USB” is set to “3.2Gen1”, the maximum resolution is 3840x2160@30Hz.

16

PIP Setting
PIP
PIP SettingGame Setting

PIP

Extra

Exit

Luminance

Off

Size

Small

Main Source

HDMI1

Position

Right-up

Sub Source

DP

Audio

Off

PIP Setting
Main Source
Sub Source
Size

OFF / PIP / PBP

Color Setup

Picture BoostSwap

OSD Setup
Off

Disable or Enable PIP or PBP.

HDMI1 、HDMI2 、DP、
USB-C
HDMI1 、HDMI2 、DP、
USB-C
Small / Middle / Large

Select main screen source.
Select sub screen source.
Select screen size.

Right-up

PIP

Position

Right-down

Set the screen location.

Left-up
Left-down

Audio

Swap

On: PIP AudioDisable or Enable Audio Setup.

Oﬀ: Main Audio
On: Swap

Swap the screen source.

Oﬀ: non action

17

Game Setting
PIP
Game SettingGame Mode

Extra

Luminance

Off

10

Overdrive

Off

Adaptive-Sync

Off

Off

FPS
RTS
RacingGame Mode

Picture Boost

Color Setup

Game Color
50

Shadow Control
Low Input Lag

Exit

OSD Setup

PIP Setting

Frame Counter

Off

Dial PointOffFor playing FPS (first Person Shooters) games.
Improves dark theme black level details.
For playing RTS (Real Time Strategy). Improves theimage quality.
For playing Racing games, Provides fastest responsetime and high color saturation.

Gamer 1

User’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.

off

No optimization by Smart image game

Shadow Control

0-100

Shadow Control Default is 50, then end-user can adjustfrom 50 to 100 or 0 to increase 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/OffTurn 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.

Weak
Overdrive

MediumStrongAdjust the response time.

Off
Adaptive-Sync

On/OffAdjust the Adaptive-Sync.

Frame Counter

Off / Right-up /Right-Down / LeftDown / Left-Up

Display V frequency on the corner selected

Dial Point

On/Off

The“Dial Point”function places an aiming indicator in thecenter of screen for helping gamers to play First Person
Shooter (FPS) games with an accurate and precise
aiming.

Note:
When the “HDR Mode” under “Brightness” is set to a non-off state, the “Game Mode”, “Dark Field Control”, and “GameTone” items under “Game Settings” cannot be adjusted.

18

Extra
PIP
Extra

Exit

Luminance

Color Setup

Picture BoostOSD Setup

PIP SettingGame Setting

Input SelectAuto

DDC/CI

Yes

Resolution : 3840(H)X2160(V)

Off Timer

00

Reset

No

H. Frequency : 135KHz

Image Ratio

Wide

V. Frequency : 60Hz

Input SelectOff timer

Select Input Signal Source
0-24hrs

Select DC off time

Wide
4:3
Image Ratio

1:1

Select image ratio for display.

Movie1
Movie2
DDC/CIReset

yes or noTurn ON/OFF DDC/CI Support

yes or no

Reset the menu to default.
(ENERGY STAR® available for selectivemodels.)ENERGY STAR® or no

19

Exit
PIP
Exit

Luminance

Color Setup

Picture BoostOSD Setup

Exit

PIP SettingGame Setting

Exit the main OSD

20

Extra

LED Indicator
Status

LED Color

Full Power ModeWhite

Active-off Mode

Orange21

TroubleshootProblem & 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 images on the screen

Picture Is Fuzzy & Has
Ghosting Shadowing Problem
Picture Bounces, Flickers Or
Wave Pattern Appears In The
PictureMonitor Is Stuck In Active OffMode”

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 theapplicable mode (the safe mode for Windows 7/8/10) and then change thefrequency 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 awayfrom 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 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 primarycolors (RED, GREEN, orBLUE)

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 centeredor 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 to auto-adjust.

Regulation & Service

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

22

Specification
General Specification
Panel

OthersModel name

U27P2CA

Driving system

TFT Color LCD

Viewable Image Size

68.5 cm diagonal

Pixel pitch

0.1554mm(H) x 0.1554mm(V)Horizontal scan range

30k-140kHz

Horizontal scan Size(Maximum)

596.736mm

Vertical scan range

23-75Hz

Vertical Scan Size(Maximum)

335.664mm

Max resolution

3840x2160@60Hz (HDMI,DP,USB C*)

Plug & PlayVESA DDC2B/CI

Power Source

100-240V~, 50/60Hz, 2.0A
Typical (Default brightness and contrast) 37W

PhysicalCharacteristics

Power Consumption

Max. (brightness = 100, contrast =100) ≤ 178W

Connector TypePower saving≤ 0.5W
HDMI×2、DP、USB C、USB×4、 USB upstream、Earphone
Detachable

Signal Cable Type
Temperature

Environmental

Humidity
AltitudeOperating0°~ 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 )Note:*: USB C(DP Alt) signal input, and “USB” is set to “3.2Gen1”, the maximum resolution is 3840x2160@30Hz.

23

Preset Display Modes

640x480@60Hz

HORIZONTALFREQUENCY(kHz)31.469VERTICALFREQUENCY(Hz)59.94

640x480@72Hz

37.86172.809640x480@75Hz

37.5

75

800x600@56Hz

35.15656.25

800x600@60Hz

37.87960.317800x600@72Hz

48.07772.188800x600@75Hz

46.875751024x768@60Hz

48.36360.0041024x768@70Hz

56.47670.0691024x768@75Hz

60.02375.0291280x1024@60Hz

63.981

60.02

1280x1024@75Hz

79.97675.0251440x900@60Hz

55.93559.8871440x900@60Hz

55.46959.901

1680x1050@60Hz

65.29

59.9541680x1050@60Hz

64.67459.883

FHD

1920x1080@60Hz

67.5

60

QHD

2560x1440@60Hz

88.78759.951***

1920x2160@60Hz

133.29359.9883840x2160@30Hz

67.5

30

3840x2160@50Hz

112.5

50

3840x2160@60Hz

135

60

31.46970.087

STANDARD

VGA

SVGA

XGA

SXGA
WXGA+
WSXGA

UHD

RESOLUTION

IBM MODES
DOS

720x400@70Hz
MAC MODES

VGA

640x480@67Hz

35

66.667

SVGA

832x624@75Hz

49.72574.551

XGA

1024x768@75Hz

60.24174.92724

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

20-Pin Color Display Signal Cable
Pin No.

Signal Name

Pin No.

1

ML_Lane 3 (n)

11

GND

2

GND

12

ML_Lane 0 (p)3

ML_Lane 3 (p)13

CONFIG1

4

ML_Lane 2 (n)14

CONFIG2

5

GND

15

AUX_CH(p)6

ML_Lane 2 (p)

16

GND

7

ML_Lane 1 (n)17

AUX_CH(n)

8

GND

18

Hot Plug Detect

9

ML_Lane 1 (p)19

Return DP_PWR

10

ML_Lane 0 (n)20

DP_PWR

25

Signal NamePlug and Play
Plug & Play DDC2B FeatureThis 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.

26