AOpen KG271U User manual

Acer LCD Monitor
User's Guide

Changes may be made periodically to the information in this publication without obligation
to notify any person of such revisions or changes. Such changes will be incorporated in new
editions of this manual or supplementary documents and publications. This company makes
no representations or warranties, either expressed or implied, with respect to the contents
hereof and specifically disclaims the implied warranties of merchantability or fitness for a
particular purpose.
Record the model number, serial number, purchase date and place of purchase information in
the space provided below. The serial number and model number are recorded on the label
affixed to your computer. All correspondence concerning your unit should include the serial
number, model number and purchase information.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in
any form or by any means, electronically, mechanically, by photocopy, recording or otherwise,
without the prior written permission of Acer Incorporated.
Model number: __________________________________
Serial number: ___________________________________
Date of purchase: ________________________________
Place of purchase: ________________________________
Copyright © 2017. Acer Incorporated.
All Rights Reserved.
Acer LCD Monitor User's Guide
Original Issue: 06/20
Acer LCD Monitor User's Guide
Acer and the Acer logo are registered trademarks of Acer Incorporated. Other companies'
product names or trademarks are used herein for identification purposes only and belong to
their respective companies.
17

iii
Special notes on LCD monitors
The following are normal with the LCD monitor and do not indicate a problem.
•Due to the nature of the fluorescent light, the screen may flicker during
initial use. Turn off the power switch and then turn it on again to make
sure the flicker disappears.
•You may find slightly uneven brightness on the screen depending on the
desktop pattern you use.
•The LCD screen has 99.99% or more effective pixels. It may include
blemishes of 0.01% or less such as a missing pixel or a pixel lit all the time.
•Due to the nature of the LCD screen, an afterimage of the previous screen
may remain after switching the image, when the same image is displayed
for hours. In this case, the screen is recovered slowly by changing the image
or turning off the power switch for a few hours.
Information for your safety and
comfort
Safety instructions
Read these instructions carefully. Keep this document for future reference.
Follow all warnings and instructions marked on the product.
Cleaning your monitor
Please carefully follow these guidelines when cleaning the monitor:
•Always unplug the monitor before cleaning.
•Use a soft cloth to wipe the screen and cabinet front and sides.
Connecting/disconnecting the device
Observe the following guidelines when connecting and disconnecting power
from the LCD monitor:
•Make sure the monitor is attached to its base before connecting the power
cord to the AC power outlet.
•Make sure both the LCD monitor and the computer are turned off before
connecting any cable or unplugging the power cord.
•If the system has multiple sources of power, disconnect power from the
system by unplugging all power cords from the power supplies.

iv
Accessibility
Be sure that the power outlet you plug the power cord into is easily accessible
and located as close to the equipment operator as possible. When you need to
disconnect power from the equipment, be sure to unplug the power cord from
the electrical outlet.
Safe listening
To protect your hearing, follow these instructions.
•Gradually increase the volume until you can hear it clearly and comfortably
and without distortion.
•After setting the volume level, do not increase it after your ears have
adjusted.
•Limit the amount of time listening to music at high volume.
•Avoid turning up the volume to block out noisy surroundings.
•Turn the volume down if you can't hear people speaking near you.
Warnings
•Do not use this product near water.
•Do not place this product on an unstable cart, stand or table. If the product
falls, it could be seriously damaged.
•Slots and openings are provided for ventilation to ensure reliable
operation of the product and to protect it from overheating. These
openings must not be blocked or covered. The openings should never be
blocked by placing the product on a bed, sofa, rug or other similar surface.
This product should never be placed near or over a radiator or heat
register, or in a built-in installation unless proper ventilation is provided.
•Never push objects of any kind into this product through cabinet slots as
they may touch dangerous voltage points or short-out parts that could
result in a fire or electric shock. Never spill liquid of any kind onto or into
the product.
•To avoid damage of internal components and to prevent battery leakage,
do not place the product on a vibrating surface.
•Never use it under sporting, exercising, or any vibrating environment
which will probably cause unexpected short current or damage internal
devices.
Using electrical power
•This product should be operated from the type of power indicated on the
marking label. If you are not sure of the type of power available, consult
your dealer or local power company.
•Do not allow anything to rest on the power cord. Do not locate this
product where people will walk on the cord.
•If an extension cord is used with this product, make sure that the total

v
ampere rating of the equipment plugged into the extension cord does not
exceed the extension cord ampere rating. Also, make sure that the total
rating of all products plugged into the wall outlet does not exceed the fuse
rating.
•Do not overload a power outlet, strip or receptacle by plugging in too
many devices. The overall system load must not exceed 80% of the branch
circuit rating. If power strips are used, the load should not exceed 80% of
the power strip's input rating.
•This product's power cord is equipped with a three-wire grounded plug.
The plug only fits in a grounded power outlet. Make sure the power outlet
is properly grounded before inserting the power cord plug. Do not insert
the plug into a non-grounded power outlet. Contact your electrician for
details.
Warning! The grounding pin is a safety feature. Using a power
outlet that is not properly grounded may result in electric shock
and/or injury.
Note: The grounding pin also provides good protection from
unexpected noise produced by other nearby electrical devices that
may interfere with the performance of this product.
•Use the product only with the supplied power supply cord set. If you need
to replace the power cord set, make sure that the new power cord meets
the following requirements: detachable type, UL listed/CSA certified, type
SPT-2, rated 7 A 125 V minimum, VDE approved or its equivalent, 4.5
meters (15 feet) maximum length.
Product servicing
Do not attempt to service this product yourself, as opening or removing covers
may expose you to dangerous voltage points or other risks. Refer all servicing to
qualified service personnel.
Unplug this product from the wall outlet and refer servicing to qualified service
personnel when:
•the power cord or plug is damaged, cut or frayed
•liquid was spilled into the product
•the product was exposed to rain or water
•the product has been dropped or the case has been damaged
•the product exhibits a distinct change in performance, indicating a need
for service
•the product does not operate normally after following the operating
instructions

vi
Note: Adjust only those controls that are covered by the operating
instructions, since improper adjustment of other controls may
result in damage and will often require extensive work by a
qualified technician to restore the product to normal condition.
Potentially explosive environments
Switch off your device in any area with a potentially explosive atmosphere and
obey all signs and instructions. Potentially explosive atmospheres include areas
where you would normally be advised to turn off your vehicle engine. Sparks in
such areas could cause an explosion or fire resulting in bodily injury or even
death. Switch off the device near gas pumps at service stations. Observe
restrictions on the use of radio equipment in fuel depots, storage and
distribution areas; chemical plants; or where blasting operations are in progress.
Areas with a potentially explosive atmosphere are often, but not always,
marked. They include below deck on boats, chemical transfer or storage
facilities, vehicles using liquefied petroleum gas (such as propane or butane),
and areas where the air contains chemicals or particles such as grain, dust or
metal powders.
Additional safety information
Your device and its enhancements may contain small parts. Keep them out of
the reach of small children.
IT Equipment Recycling Information
Acer is strongly committed to environmental protection and views recycling, in
the form of salvaging and disposal of used equipment, as one of the company's
top priorities in minimizing the burden placed on the environment.
We at Acer are very conscious of the environmental effects of our business and
strive to identify and provide the best working procedures to reduce the
environmental impact of our products.
For more information and help when recycling, please go to this website:
Visit www. .com for further information on the features and benefits
of our other products.
http://www.acer-group.com/public/Sustainability/
acer-group

vii
Disposal instructions
Do not throw this electronic device into the trash when discarding.
To minimize pollution and ensure utmost protection of the global environment,
please recycle. For more information on the Waste from Electrical and
Electronics Equipment (WEEE) regulations, visit
LCD pixel statement
The LCD unit is produced with high-precision manufacturing techniques.
Nevertheless, some pixels may occasionally misfire or appear as black or
red dots. This has no effect on the recorded image and does not constitute
a malfunction.
http://www.acer‐group.com/public/Sustainability

viii
This product has been shipped enabled for power management:
•Activate display’s Sleep mode within 15 minutes of user inactivity.
•Activate computer’s Sleep mode within 30 minutes of user inactivity.
•Wake the computer from Sleep mode by pushing the power button.
Tips and information for comfortable use
Computer users may complain of eyestrain and headaches after prolonged use.
Users are also at risk of physical injury after long hours of working in front of a
computer. Long work periods, bad posture, poor work habits, stress,
inadequate working conditions, personal health and other factors greatly
increase the risk of physical injury.
Incorrect computer usage may lead to carpal tunnel syndrome, tendonitis,
tenosynovitis or other musculoskeletal disorders. The following symptoms may
appear in the hands, wrists, arms, shoulders, neck or back:
•numbness, or a burning or tingling sensation
•aching, soreness or tenderness
•pain, swelling or throbbing
•stiffness or tightness
•coldness or weakness
If you have these symptoms, or any other recurring or persistent discomfort
and/or pain related to computer use, consult a physician immediately and
inform your company's health and safety department.
The following section provides tips for more comfortable computer use.
Finding your comfort zone
Find your comfort zone by adjusting the viewing angle of the monitor, using a
footrest, or raising your sitting height to achieve maximum comfort. Observe
the following tips:
•refrain from staying too long in one fixed posture
•avoid slouching forward and/or leaning backward
•stand up and walk around regularly to remove the strain on your leg
muscles

ix
Taking care of your vision
Long viewing hours, wearing incorrect glasses or contact lenses, glare, excessive
room lighting, poorly focused screens, very small typefaces and low-contrast
displays could stress your eyes. The following sections provide suggestions on
how to reduce eyestrain.
Eyes
•Rest your eyes frequently.
•Give your eyes regular breaks by looking away from the monitor and
focusing on a distant point.
•Blink frequently to keep your eyes from drying out.
Display
•Keep your display clean.
•Keep your head at a higher level than the top edge of the display so your
eyes point downward when looking at the middle of the display.
•Adjust the display brightness and/or contrast to a comfortable level for
enhanced text readability and graphics clarity.
•Eliminate glare and reflections by:
•placing your display in such a way that the side faces the window or
any light source
•minimizing room light by using drapes, shades or blinds
•using a task light
•changing the display's viewing angle
•using a glare-reduction filter
•using a display visor, such as a piece of cardboard extended from the
display's top front edge
•Avoid adjusting your display to an awkward viewing angle.
•Avoid looking at brightlightsources, suchas open windows, for extended
periods of time.
Developing good work habits
Develop the following work habits to make your computer use more relaxing
and productive:
•Take short breaks regularly and often.
•Perform some stretching exercises.
•Breathe fresh air as often as possible.
•Exercise regularly and maintain a healthy body.

TABLE OF CONTENTS
UNPACKING............................................................................................ 1
ATTACHING / REMOVING THE BASE..................................................... 2
SCREEN POSITION ADJUSTMENT .......................................................... 3
CONNECTING THE POWER CORD.......................................................... 4
SAFETY PRECAUTION............................................................................. 4
CLEANING YOUR MONITOR .................................................................. 4
POWER SAVING...................................................................................... 5
DDC......................................................................................................... 5
CONNECTOR PIN ASSIGNMENT............................................................. 6
Standard Timing Table .......................................................................... 7
INSTALLATION........................................................................................ 8
USER CONTROLS .................................................................................... 9
TROUBLESHOOTING ............................................................................ 18

EN-1
UNPACKING
Please check the following items are present when you unpack the box, and
save the packing materials in case you will need to ship or transport the
monitor in future.
LCD Monitor Quick Start Guide AC Power Cord
DP Cable
(Optional)
HDMI Cable
(Optional)

EN-2
ATTACHING / REMOVING THE BASE
Note: Remove the monitor and monitor base from its packaging.
Carefully place the monitor face-down on a stable surface -- use a
cloth to avoid scratching the screen.
1.
Attach the stand arm and the base
to the monitor, as illustrated.
2.
Ensure that the base is screwed tight
onto the monitor stand arm.
Note: If installing with a wall mounting kit, it is recommended to use
M4 x 10 (L) mm screws to fix your monitor on the wall.

EN-3
SCREEN POSITION ADJUSTMENT
In order to optimize the best viewing position, you can adjust the height/tilt
of the monitor.
• Tilt
Please see the illustration below for an example of the tilt range.
The monitor can be adjusted to 15 degrees up or 5 degrees down as indicated
by arrow below.
-5° 15°

EN-4
CONNECTING THE POWER CORD
Check first to make sure that the power cord you use is the correct type
required for your area.
This monitor has a universal power supply that allows operation in either
100/120V AC or 220/240 V AC voltage area. No user-adjustment is required.
Plug one end of the power cord to the AC inlet, and plug the other end
into an AC outlet.
For unit using at 120 V AC:
Use a UL Listed Cord Set, Type SVT wire and plug rated 10 A/125 V.
For unit using at 220/240 V AC (outside of U.S.):
Use a Cord Set consisting of H05VV-F cord and plug rated 10 A, 250 V. The
cord set should have the appropriate safety approvals for the country in
which the equipment will be installed.
SAFETY PRECAUTION
Avoid placing the monitor, or any other heavy object, on the power cord
to avoid damage to the cable.
Do not expose the monitor to rain, excessive moisture, or dust.
Do not cover the ventilation slots or openings of the monitor. Always put
the monitor in a place where there is adequate ventilation.
Avoid placing the monitor against a bright background or where sun-light
or other light sources may reflect on the face of the monitor. Place the
monitor just below eye level.
Handle with care when transporting the monitor.
Refrain from giving shock or scratch to the screen, as screen is fragile.
In order to prevent damage to the monitor, do not lift the monitor by its
base.
CLEANING YOUR MONITOR
Please carefully follow the below guidelines when cleaning the monitor.
Always unplug the monitor before cleaning.
Use a soft cloth to gently wipe the screen and cabinet front and sides.
NEVER SPRAY OR POUR ANY LIQUID DIRECTLY ONTO THE SCREEN OR
CASE.
PLEASE DO NOT USE ANY AMMONIA OR ALCOHOL-BASED CLEANERS ON
THE LCD DISPLAY SCREEN OR CASE.
Acer will not be liable for damage resulting from use of any ammonia or
alcohol-based cleaners.

EN-5
POWER SAVING
The monitor will be driven into “Power Saving” mode by the control signal
from the display controller, as indicated by the amber-color power LED.
The power saving states will be kept until a control signal has been detected
or the keyboard or mouse is activated. The recovery time from Active OFF
state back to ON state is around 3 seconds.
DDC
To make your installation easier, the monitor is able to Plug and Play with
your system if your system also supports DDC protocol. The DDC (Display Data
Channel) is a communication protocol through which the monitor
automatically informs the host system about its capabilities, for example,
supported resolutions and corresponding timing. The monitor supports
DDC2B standard.
State LED Light
ON Blue
Power Saving Mode Amber

EN-6
CONNECTOR PIN ASSIGNMENT
19-Pin Color Display Signal Cable*
* Only for certain models
20-Pin Color Display Signal Cable*
* Only for certain models
PIN Meaning PIN Meaning
1. TMDS Data2+ 10. TMDS Clock+
2. TMDS Data2 Shield 11. TMDS Clock Shield
3. TMDS Data2- 12. TMDS Clock-
4. TMDS Data1+ 13. CEC
5. TMDS Data1 Shield 14. Reserved (N.C. on device)
6. TMDS Data1- 15. SCL
7. TMDS Data0+ 16. SDA
8. TMDS Data0 Shield 17. DDC/CEC Ground
9. TMDS Data0- 18. +5V Power
19. Hot Plug Detect
PIN Description PIN Description
1. Lane0(p) 11. GND
2. GND 12. Lane3(n)
3. Lane0(n) 13. Config1
4. Lane1(p) 14. Config2
5. GND 15. AUX_CH (n)
6. Lane1(n) 16. GND
7. Lane2(p) 17. AUX_CH (p)
8. GND 18. Hot Plug Detect
9. Lane3(n) 19. DP Power_Return
10. Lane3(p) 20. DP Power

EN-7
Standard Timing Table
* For HDMI only
** For DP only
Mode Resolution
1 VGA 640 x 480 60 Hz
2 VGA 640 x 480 72 Hz
3 VGA 640 x 480 75 Hz
4 MAC 640 x 480 66.66 Hz
5 VESA 720 x 400 70 Hz
6 SVGA 800 x 600 56 Hz
7 SVGA 800 x 600 60 Hz
8 SVGA 800 x 600 72 Hz
9 SVGA 800 x 600 75 Hz
10 MAC 832 x 624 74.55 Hz
11 XGA 1024 x 768 60 Hz
12 XGA 1024 x 768 70 Hz
13 XGA 1024 x 768 75 Hz
14 MAC 1152 x 870 75 Hz
15 VESA 1152 x 864 75 Hz
16 VESA 1280 x 960 60 Hz
17 SXGA 1280 x1024 60 Hz
18 SXGA 1280 x1024 75 Hz
19 VESA 1280 x 720 60 Hz
20 WXGA 1280 x 800 60 Hz
21 WXGA+ 1440 x 900 60 Hz
22 WSXGA+ 1680 x 1050 60 Hz
23 FHD 1920 x 1080 60 Hz
24 QHD 2560 x 1440 60 Hz
25* QHD 2560 x 1440 70 Hz
26** QHD 2560 x 1440 75 Hz

EN-8
INSTALLATION
To install the monitor to your host system, please follow the steps as given
below:
Steps
1. 1-1 Connect DP Cable (Only DP-input Model)
a. Make sure both the monitor and computer are powered-OFF.
b. Connect the DP cable to the computer.
1-2 Connect HDMI Cable (Only HDMI-input Model)
a. Make sure both the monitor and computer are powered-OFF.
b. Connect the HDMI cable to the computer.
2. Insert the monitor power cable into the power port at the back of the
monitor.
3. Plug the power cords of your computer and your monitor into a nearby
electrical outlet.
HDMI
DP
DP1 DP2
HDMI2HDMI1

EN-9
USER CONTROLS
Base Controls
Icon Item Description
Power button/
indicator
Turns the monitor on/off. Blue indicates power on.
Amber indicates standby/power saving mode.
OSD functions Press to view the OSD. Press again to enter a
selection in the OSD.
Input button Press to toggle input sources.
Volume button Press to activate the volume sliding scale.
Brightness Press the key to open the Brightness control and
set it to your preferred level.
Mode Press to trigger Mode control.

EN-10
Adjusting the OSD settings
The OSD (on-screen display) can be used for adjusting the settings of your LCD
Monitor. Press the MENU key to open the OSD. You can use the OSD to adjust
the picture quality, OSD position and general settings. For advanced settings,
please refer to following page:
Main Page
Turn Mode on or off
Open the Mode control and turn Mode on or off using the adjustment arrows
(OFF/ON), and select which profile to use (Please see the OSD section for more
information).
Adjusting the Brightness setting
Open the Brightness control and select the brightness setting using the
arrows. When you are done, use to go back one level.
Note: The following content is for general reference only. Actual
product specifications may vary.
1. Mode
2. Brightness
3. Volume
4. Input selection
5. Function menu