AOC LM720
AOC LM720
17 inch TFT LCD Monitor
User’s
Manual
by Envision Peripherals, Inc.
Before operating your monitor, please read this
manual thoroughly.
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Precautions
AOC LM720
• Do not use the monitor near water, e.g. near a
bathtub, washbowl, kitchen sink, laundry tub,
swimming pool or in a wet basement.
• The monitor is equipped with a three-pronged
grounded plug, a plug with a third (grounding)
pin. As a safety feature, this plug will only fit
into a grounded power outlet. 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.
• Do not place the monitor on an unstable cart,
stand, or table. If the monitor falls, it can injure
a person and cause serious damage to the
appliance. Use only a cart or stand
recommended by the manufacturer or sold with
the monitor. If you mount the monitor on a wall
or shelf, use a mounting kit approved by the
manufacturer and follow the kit instructions.
• 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.
• Slots and openings in the back and bottom of
the cabinet are provided for ventilation. To
ensure reliable operation of the monitor and to
protect it from overheating, be sure these
openings are not blocked or covered. Do not
place the monitor on a bed, sofa, rug, or similar
surface. Do not place the monitor near or over
a radiator or heat register. Do not place the
monitor in a bookcase or cabinet unless proper
ventilation is provided.
• Never push any object into the slot on the
monitor cabinet. It could short circuit parts
causing a fire or electric shock. Never spill
liquids on the monitor.
• Do not attempt to service the monitor yourself;
opening or removing covers can expose you to
dangerous voltage and other hazards. Please
refer all servicing to qualified service personnel.
• The monitor should be operated only with 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.
• To ensure satisfactory operation, use the
monitor only with UL-listed computers which
have appropriately configured receptacles
marked between 100 - 240 V AC, Min. 5A.
• The wall socket should be installed near the
equipment and should be easily accessible.
• Do not overload power strips and extension
cords. Overloading can result in fire or electric
shock.
• Disconnect the power cord to stop the power
supply to the monitor.
• For use only with power adapter (Output
12Vdc) which has UL, CSA listed license.
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For Your Safety
AOC LM720
Special Notes on LCD Monitors
General Notes
The following symptoms are normal with an LCD
monitor and do not indicate a problem:
• Do not install the monitor near heat sources
such as radiators or air ducts.
• 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.
• Do not place monitor in direct sunlight or in
areas with excessive dust, mechanical vibration
or shock.
• Save the original shipping carton and packing
materials in case you need to ship your monitor.
Be sure to repackage your monitor as it was
originally packed at the factory.
• You may find slightly uneven brightness on the
screen depending on the desktop pattern you
use.
• The LCD screen has effective pixels of 99.99%
or more. It may include blemishes of 0.01% or
less such as a missing pixel or a pixel lit all of
the time.
• Periodically clean your monitor with a soft cloth.
Stubborn stains may be removed with a cloth
lightly dampened with a mild detergent solution.
Never use strong solvents such as thinners,
benzene, or abrasive cleaners, since these
will damage the cabinet. Always unplug the
monitor before cleaning it.
• Due to the nature of the LCD screen, an after-
image of the previous screen may remain after
switching from an image that has been
displayed for hours. This after-image could
require several hours to disappear.
Using the Right Power Cord
The supplied power cord is a NEMA 5-15 style
plug. It is UL-listed and CSA labeled for
125 volts AC.
• The life of the fluorescent light used in the LCD
monitor is approximately 30,000 hours. Contact
your dealer or EPI service center for
replacement when the screen is dark, flickering
or not lighting up. Never attempt to replace it by
yourself.
If the monitor will be connected to your computer’s
power outlet, use a minimum No. 18 AWG, type
SJT or SVT three conductors cord with one end
terminating with a male grounded plug, rated 10A,
250V, CEE-22. The other end must terminate with
a molded-on type connector body, rated 10A,
250V, having standard CEE-22 female
configuration.
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Before You Operate the Monitor
AOC LM720
Installing & Removing the Base
General Features:
Package Contents
• 17" (43.2cm) TFT Color LCD Monitor
The box that your monitor was shipped in should
have included the following items:
• Crisp, Clear Display for Windows
1. LM720 LCD Monitor
2. Power Adapter
• Supports Resolutions up to 1280 X 1024 pixels
@75Hz, (1280 x 1024 @ 60Hz Recommended)
3. Power Cord
• EPA ENERGY STAR®
4. Windows 95/98/2000/ME/XP INF Driver Disk
5. Quick Start Guide
6. Booklet (Containing Warranty & Safety
Information)
• Ergonomic Design
• Space Saving, Compact Case Design
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Before You Operate the Monitor
AOC LM720
Connecting the Wires Using the Power Cord Supplied
1. Connect the built-in video cable into the 15-pin
connector on the back of your computer and
tighten the two screws.
Caution: Make sure the power cord is the correct
type that is required in your area. This LCD
monitor has a universal power supply that allows
operation in either 100/120V AC or 220/240V AC
voltage areas (no user adjustment is required).
2. Connect the power cord into the power adaptor.
3. Plug the other end of the power cord into a
grounded AC outlet or UL-approved power
strip.
If the AC outlet is not grounded (with three holes),
install the proper grounding adapter (not
supplied).
4. Connect the power adapter into the DC IN
socket on the back of the monitor.
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Before You Operate the Monitor
AOC LM720
Preparing to Install An Optional Wall Mounting Arm (Not supplied)
This monitor can be attached to a wall mounting
arm you purchase separately. Disconnect power
before this procedure. Follow these steps:
See next page for further installation instructions.
1. Pull the screw covers off the back of the
monitor.
2. Support the base and remove the screws.
3. Remove the base.
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Before You Operate the Monitor
AOC LM720
Install An Optional Wall Mounting Arm (Not supplied)
Follow these steps to finish installing the wall
mounting arm:
AOC's Model LM720 is compatible with the
Ergotron line of mounting and arm solutions.
1. 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.
Contact Ergotron at 800-888-8458 or visit their
information on the many ways on which you can
mount your AOC LCD monitor.
2. Insert the 4 screws into the holes and tighten.
3. Insert the power cable into the slot on the back
of the monitor.
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Before You Operate the Monitor
AOC LM720
Adjusting the Viewing Angle
How to Install INF & ICM File
For optimal viewing, adjust the monitor's angle to
your own preference.
1. Insert the Windows 95/98/2000/ME/XP INF
Driver Disk into your floppy drive.
• Hold the stand firmly when you change the
monitor's angle.
2. Follow the Add New Hardware Wizard
instructions on the screen.
• You can adjust the monitor's angle from -5° to
25°.
3. If the wizard asks for the location of the driver
file, select drive A and press Next.
• Do not touch the LCD screen when you change
the angle. It may cause damage or breakage.
• Be careful to avoid pinching your hand in the
swivel base.
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Operating Instructions
AOC LM720
Front Panel Buttons
Auto: Press this button to automatically set
the H-Position, V-Position, Clock and
Focus settings.
Power Indicator: A green light indicates
that the monitor is on. An orange light
indicates that the monitor is in Off mode.
Power: Press this button to turn the
monitor on or off. The power indicator
will light up.
Brightness: Press this button to adjust the
picture’s brightness. If the OSD window is
open, this button allows you to move within
the window and select desired functions.
Contrast: Press this button to adjust the
picture’s contrast. If the OSD window is
open, this button allows you to move within
the window and select desired functions.
MENU: Press this button to open the OSD
window or exit from the OSD window.
On-screen Display (OSD): Press the
MENU button to open the OSD window
and adjust settings on your monitor.
(See next page.)
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Operating Instructions
AOC LM720
Adjusting the OSD Settings
1. Press the MENU button to open the OSD
5. To save and exit, highlight the EXIT icon and
press MENU or leave the monitor alone for 10
seconds. If you want to adjust any other
function, repeat steps 2-4.
window.
2. Press the < or > buttons until the desired
function is highlighted.
Note: When the OSD window is open, the input
signal timing settings appear at the top.
H: stands for horizontal frequency and
V: stands for vertical frequency.
3. Press MENU to open the function’s window.
4. Press the < or > buttons to change the settings
of the function.
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Operating Instructions
AOC LM720
pattern has vertical stripe noise, or the characters
are twisted):
DOS-mode
This feature allows you to choose between
resolutions of 720 x 400 or 640 x 400 while
working in DOS-mode. Follow the instructions for
selecting functions in the OSD window as listed on
the previous page. Press your monitor’s Power
button off and then on to activate your chosen
DOS-mode resolution. Note: the default DOS-
mode resolution is 720x400@70Hz.
1. Change the resolution to 640 x 400
2. Press the Power button off and then on.
3. Press the AUTO button for 2 seconds.
Note: the above procedure must process
in full-screen pattern.
To exit, press the ESC key or press ALT-F, and
then press the X key.
How to Optimize the DOS-mode
1. Insert the Windows 95/98/2000/ME INF Driver
Disk into your floppy drive.
Plug & Play DDC1/2B Feature
This monitor is equipped with VESA DDC1/2B
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
communication channel is defined in two levels,
DDC1 and DDC2B.
2. Open Windows Explorer to search on the
floppy drive (Drive A:) to find the Dos1.exe file.
3. Double-click on the Dos1.exe file.
4. Expand the picture to full screen by pressing
the icon on the top of window. If there is no
icon, the picture is already at full screen.
The DDC1 is a unidirectional data channel from
the display to the host that continuously transmits
EDID information. The DDC2B is a bidirectional
data channel based on the I²C protocol. The host
can request EDID information over the DDC2B.
If you don't have the driver disk:
1. Choose Start / Programs / MS-DOS mode.
2. Type C:\> EDIT and press Enter. You will be in
the Dos-Editor screen.
3. Press the AUTO button on the front of your
monitor for 2 seconds. The screen will be
automatically adjusted.
If the screen is distorted (for example: the picture
can't go to full screen, the background of white
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Technical Support (FAQ)
AOC LM720
Problem
Possible Solution
Power LED is not ON • Make sure the power button is ON.
• Make sure the power adaptor is properly connected to a grounded power
outlet and to the monitor.
No Plug & Play
Picture is fuzzy
• Confirm that your computer is Plug & Play compatible.
• Confirm that your video card is Plug & Play compatible.
• Inspect the video cable and make sure that none of the pins are bent.
• Make sure the AOC monitor drivers are installed.
(AOC monitor drivers are available at: www.aocmonitor.com)
• Adjust the Contrast and Brightness settings.
Picture bounces or a
wave pattern is
• Move electrical devices away from the monitor. They may be causing
electrical interference.
present in the picture
Power LED is ON
• Press a key on the keyboard or wiggle the mouse to re-activate the monitor.
(green or orange light • Make sure the video cable is properly connected to the computer.
is ON) but there is no • Inspect the video cable and make sure none of the pins are bent.
video or picture.
• Make sure your computer is operating correctly by pressing the CAPS LOCK
key and observing whether the CAPS LOCK light turns ON or OFF.
Missing one of the
primary colors (RED,
GREEN, or BLUE)
• Inspect the video cable and make sure that none of the pins are bent.
• Make sure the video cable is properly connected to the computer.
Dead Pixel Criteria
• In order to provide the highest performing products, EPI has set the following
limits as to the maximum allowable number of bad pixels: 5 Bright Sub-pixels
or 5 Dark Sub-pixels or combination of 8 Dark & Bright. The panel used on
this product has a total of 3,932,160 sub-pixels. So even the maximum
allowed of 8 bad sub-pixels would only amount to a very small 0.00020% of
the total sub-pixels
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Technical Support (FAQ)
AOC LM720
Problem
Possible Solution
• Adjust the CLOCK1 and FOCUS2 settings or press the AUTO button to
automatically re-configure the monitor’s settings.
Screen image is not
centered or sized
properly
Picture has color
defects (white does
not look white)
• Adjust the settings for Red, Green and/or Blue colors or select a different
color temperature: 65 (6500 K) or 78 (7800 K).
Poor brightness or
contrast
• The life time of the back-light is limited. After 30,000 hours, the luminance of
the light has been reduced to half of its original value. Please send the
monitor to an authorized service agent for service.
Horizontal or vertical
disturbances on the
screen
• Adjust the CLOCK and FOCUS settings or press the AUTO button to
automatically re-configure the monitor’s settings.
• Use Win 95/98 shut-down mode.
1CLOCK (pixel frequency) controls the number of pixels scanned by one horizontal sweep. If the frequency is
not correct, the screen shows vertical stripes and the picture’s width is incorrect.
2FOCUS adjusts the phase of the pixel clock signal. With a wrong phase adjustment the picture has horizontal
disturbances with very light screen images.
Note: For FOCUS and CLOCK adjustment use “dot-pattern” or Win 95/98 shut-down mode pattern.
Error Message
Possible Solution
Cable not connected
• Make sure the video cable is properly connected to the computer.
If the connector is loose, tighten the connector's two screws.
• Inspect the video cable and make sure that none of the pins are bent.
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Technical Support (FAQ)
AOC LM720
Error Message
Possible Solution
Input not supported
• Your computer has been set to an incompatible display mode. Right click on
the desktop and choose Properties. Click the Settings tab then set your
computer’s display mode to one of the settings listed in the resolution chart
below.
Unsupported mode
try different video
card setting
• Your computer’s resolution is out of VESA specifications. Right click on the
desktop and choose Properties. Click the Settings tab then set your
computer’s display mode to one of the settings listed in the resolution chart
below.
Resolution Chart
Resolution
(in pixels)
Vertical
Frequency
Resolution
(in pixels)
Vertical
Frequency
640 x 480
640 x 400
640 x 350
720 x 400
640 x 480
640 x 480
640 x 480
800 x 600
800 x 600
60 Hz
70 Hz
800 x 600
800 x 600
72.2 Hz
75 Hz
70 Hz
832 x 624
74.5 Hz
60 Hz
70 Hz
1024 x 768
1024 x 768
1024 x 768
1024 x 768
1280 x 1024
1280 x 1024
72.8 Hz
75 Hz
70 Hz
75 Hz
66.67 Hz
56.3 Hz
60.3 Hz
74.92 Hz
60 Hz
75 Hz
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Appendix
AOC LM720
Specifications
Plug & Play
VESA DDC1/
2BTM
LCD
Panel
Driving
system
TFT Color LCD
Input Connector
D-Sub 15-pin
Size
17" (43.2 cm)
Diagonal
Input Video Signal
Analog: 0.7 Vpp
(standard),
75 OHM, Positive
Pixel pitch
0.264 mm (H) x
0.264 mm (V)
Maximum Screen Size
Horizontal:
13.3" (338 mm)
Viewable
angle
150° (H) 125° (V)
Vertical:
10.6" (270 mm)
Input
Response
time
16 milliseconds
Power Source
100~240 VAC,
50/60 Hz
Video
Red, Green, Blue
Analog Interface
Environmental
Considerations
Operating Temp:
32° to 104°F
(0° to 40°C)
Separate
Sync.
H/V TTL
H-Frequency
V-Frequency
30 kHz - 80 kHz
55-75 Hz
Storage Temp:
14° to 122°F
(-10° to 50°C)
Display Colors
Dot Clock
16.7 million colors
135 MHz
Operating
Humidity:
20% to 90%
Maximum Resolution
1280 x 1024 pixels
Weight
11.0 lbs. (5.0 Kg)
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Appendix
AOC LM720
Specifications (continued)
Front Panel Buttons
Auto
Brightness
Contrast
Power Switch
MENU/ Exit
External
Controls:
Functions Contrast
Brightness
Focus
Clock
H-Position
V-Position
Auto-Center
Language
Dos-mode Resolution
Selected
6500° K
7800° K
RGB Color temp.
Recall
Exit
EPA ENERGY
STAR®
Yes
Power Consumption
(Maximum)
45 Watts
Regulatory
Compliance
UL, CSA, FCC, TÜV/
GS, CE, XP Logo
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Appendix
AOC LM720
Factory Preset Timing Table
Resolution
(in pixels)
Horizontal
Frequency
Vertical
Frequency
Standard
DOS-Mode
600 x 400
31.47 kHz
70 Hz
720 x 400
640 x 480
640 × 480
640 × 480
800 × 600
800 × 600
832 × 624
1024 × 768
1024 × 768
1024 × 768
1024 × 768
1280 x 1024
1280 x 1024
31.47 kHz
31.47 kHz
35.00 kHz
37.50 kHz
37.879 kHz
46.875 kHz
49.725 kHz
48.363 kHz
56.476 kHz
60.02 kHz
60.241 kHz
64.00 kHz
80.00 kHz
70 Hz
60 Hz
66.6 Hz
75 Hz
60 Hz
75 Hz
75 Hz
60 Hz
70 Hz
75 Hz
74.9 Hz
60 Hz
75 Hz
VGA
SVGA
XGA
SXGA
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Appendix
AOC LM720
Connector Pin Assignment
Pin Number
Description
Pin Number
Description
+5V
1
2
3
4
5
6
7
8
Red
9
Green
10
11
12
13
14
15
Detect Cable
NC
Blue
Ground
Ground
R-Ground
G-Ground
B-Ground
DDC-Serial Data
H-Sync
V-Sync
DDC-Serial Clock
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