LM540
15 inch TFT LCD Monitor
User’s
Manual
by Envision Peripherals, Inc.
www.AOCdisplay.com
LM540
LM540
Before operating your monitor, please read this
manual thoroughly.
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17NOV04
For Your Safety
LM540
FCC Statement
This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference in a residential
installation. This equipment generates, uses and
can radiate radio frequency energy, and if not
installed and used in accordance with the
instructions, may cause harmful interference to
radio communications. However, there is no
guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television
reception, which can be determin ed by turn ing the
equipment off and on, the user is encouraged to try
to correct the interference by one or more of the
following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment
and receiver.
3. Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
4. Consult the dealer or an experienced radio/TV
technician for help.
Notice
1. The changes or modifications not expressly
approved by the party responsible for
compliance could void the user's authority to
operate the equipment.
2. Shielded interface cables and AC power cord, if
any, must be used in order to comply with the
emission limits.
3. The manufacturer is not responsible for any
radio or TV interference caused by unauthorized
modification to this equipment. It is the
responsibility of the user to correct such
interference.
As an ENERGY STAR
Peripherals, Inc. has determined that this product
meets the ENERGY STAR
efficiency.
®
Partner, Envision
®
guidelines for energy
Warning
To prevent fire or shock hazard, do not expose the
monitor to rain or moisture. Dangerously high
voltage is present inside the monitor. Do not open
the cabinet. Refer servicing to qualified personnel
only.
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17NOV04
For Your Safety
LM540
Precautions
• Do not use the monitor near water, e.g. near a
bathtub, washbowl, kitchen sink, laundry tub,
swimming pool or in a wet basement.
• 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.
• 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 pla ce the m oni to r ne ar or ov er a
radiator or heat register. Do not place the
monitor in a bookcase or cabinet unless proper
ventilation is provided.
• 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.
• 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.
• Unplug the unit during a lightning storm or when
it will not be used for long periods of time.
This will protect the monitor from damage due to
power surges.
• Do not overload power strips and extension
cords. Overloading can result in fire or electric
shock.
• 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.
• To ensure satisfactory operation, use the
monitor only with UL-listed computers which
have appropriately configured receptacles
marked between 100 - 240 V AC, Min. 3.5A.
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• The wall socket should be installed near the
equipment and should be easily accessible.
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17NOV04
For Your Safety
LM540
Special Notes on LCD Monitors
The following symptoms are normal with an 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 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.
• Due to the nature of the LCD screen, an afterimage 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.
• The life of the fluorescent light used in the LCD
monitor is approximately 20,000 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.
General Notes
• Do not install the monitor near heat sources
such as radiators or air ducts.
• 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 ca se you n eed to ship your monit or.
Be sure to repackage your monitor as it was
originally packed at the factory.
• 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.
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.
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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17NOV04
Before You Operate the Monitor
Installing & Removing the Base
LM540
General Features:
• 38.1cm(15") TFT Color LCD Monitor
• Crisp, Clear Display for Windows
• Supports Resolutions up to 1024 X 768 pixels
@75Hz, (1024 x 768 @ 60Hz Recommended)
• EPA ENERGY STAR
• Ergonomic Design
• Space Saving, Compact Case Design
LM540
®
Package Contents
The box that your monitor was shipped in should
have included the following items:
1. LM540 LCD Monitor
2. Power Cord
3. Windows 95/98/2000/ME/XP INF Driver Disk
4. Quick Start Guide
5. Booklet (Containing Warranty & Safety
Information)
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17NOV04
Before You Operate the Monitor
Connecting the Wires Using the Power Cord Supplied
LM540
1. Connect the built-in video cable into the 15-pin
connector on the back of your computer and
tighten the two screws.
2. Connect the power cord into your LCD monitor's
Power Adapter.
3. Connect the Power Adapter to your monitor.
4. Plug the other end of the power cord into a
grounded AC outlet or UL-approved power strip.
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Caution: Make sure the power cord is the corre ct
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).
If the AC outlet is not grounded (with three
holes), install the proper grounding adapter (not
supplied).
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17NOV04
Before You Operate the Monitor
Adjusting the Viewing Angle
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For optimal viewing, adjust the monitor's angle to
your own preference.
• Hold the stand firmly when you change the
monitor's angle.
• You can adjust the monitor's angle from
-5° to 25°.
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• 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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17NOV04
Before You Operate the Monitor
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Preparing To Install An Optional Wall Mounting Arm (Not Supplied)
This monitor can be attached to a wall mounting arm you can purchase separately. Disconnect power
before performing this procedure. Follow these step.
1. Pull the screw covers off the back of the monitor.
2. Support the base and remove the screws.
3. Remove the base.
4. Follow the manufacturer’s instructions to assemble the wall mounting arm.
See next page for further installation instructions.
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17NOV04
Before You Operate the Monitor
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nstall An Optional Wall Mounting Arm (Not Supplied)
Follow these steps to finish installing the wall mounting arm:
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.
2. Insert the 4 screws into the holes and tighten.
3. Insert the power cable into the slot on the back of the monitor.
NOTE: The Envision LM540 is compatible with the Ergotron line of mounting and arm solutions. Visit their
website at www.ergotron.com for more information on the many ways on which you can mount your AOC
LCD monitor.
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17NOV04
Front Panel Buttons
Operating Instructions
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Auto: Press this button to automatically set
the H-Position, V-Position, Clock and Focus
settings.
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.
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10
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.
On-screen Display (OSD): Press the
MENU button to open the OSD window
and adjust settings on your monitor.
(See next page.)
17NOV04
Operating Instructions
Adjusting the OSD Settings
LM540
1. Press the MENU button to open the OSD
window.
2. Press the < or > buttons until the desired
function is highlighted.
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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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.
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.
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17NOV04
Operating Instructions
LM540
Plug & Play DDC1/2B Feature
This monitor is equipped with VESA DDC1/2B
capabilities according to the VESA DDC
ST ANDARD. 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.
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.
How to Install INF & ICM File
1. Insert the Windows 95/98/2000/ME/XP INF
Driver Disk into your floppy drive.
2. Follow the Add New Hardware Wizard
instructions on the screen.
3. If the wizard asks for the location of the driver
file, select drive A and press Next.
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Technical Support (FAQ)
Problem Possible Solution
Power LED is not ON • Make sure the power button is ON.
• Make sure the power cord is properly connected to a grounded power outlet
and to the monitor.
No Plug & Play • 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 Envision monitor drivers are installed.
(AOC monitor drivers are available at: www.AOCdisplay.com)
Picture is fuzzy •Adjust the Contrast and Brightness settings.
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Picture bounces or a
wave pattern is
present in the picture
Power LED is ON
(green or orange light
is ON) but there is no
video or picture.
Dead Pixel Criteria • In order to provide the highest performing products, EPI has set the following
Missing one of the
primary colors (RED,
GREEN, or BLUE)
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• Move electrical devices away from the monitor. They may be causing
electrical interference.
• Press a key on the keyboard or wiggle the mouse to re-activate the monitor.
• Make sure the video cable is properly connected to the computer.
• Inspect the video cable and make sure none of the pins are bent.
• Make sure your computer is operating correctly by pressing the CAPS LOCK
key and observing whether the CAPS LOCK light turns ON or OFF.
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 2,359,296 sub-pixels. So even
the maximum allowed of 6 bad sub-pixels would only amount to a very small
0.00033% of the total sub-pixels.
• 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.
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Technical Support (FAQ)
Problem Possible Solution
LM540
Screen image is not
centered or sized
• Adjust the CLOCK
automatically re-configure the monitor’s settings.
1
and FOCUS2 settings or press the AUTO button to
properly
Picture has color
defects (white does
• Adjust the settings for Red, Green and/or Blue colors or select a different
color temperature: C1 or C2.
not look white)
Poor brightness or
contrast
• The life time of the back-light is limited. After 20,000 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
1
CLOCK (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.
2
FOCUS adjusts the phase of the pixel clock signal. With a wrong phase adjustment the picture has horizontal
disturbances with very light screen images.
• 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.
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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17NOV04
Technical Support (FAQ)
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.
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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)
640 x 480 60 Hz 800 x 600 60.3 Hz
640 x 400 70 Hz 800 x 600 72.2 Hz
640 x 350 70 Hz 800 x 600 75 Hz
720 x 400 70 Hz 832 x 624 74.5 Hz
640 x 480 72.8 Hz 1024 x 768 60 Hz
640 x 480 75 Hz 1024 x 768 70 Hz
640 x 480 66.67 Hz 1024 x 768 75 Hz
800 x 600 56.3 Hz 1024 x 768 74.92 Hz
Vertical
Frequency
Resolution
(in pixels)
Vertical
Frequency
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17NOV04
Appendix
LM540
Specifications
LCD
Panel
Input Response
Display Colors 16 million colors
Driving
system
Size 15.0" (38.1 cm)
Pixel pitch (0.297 mm) (H) x
Viewable
angle
time
Video Red, Green, Blue
Separate
Sync.
H-Frequency 30 kHz - 63 kHz
V-Frequency 50-75 Hz
TFT Color LCD
(0.297 mm) (V)
120° (H) 100° (V)
25 milliseconds
Analog Interface
H/V TTL
Plug & Play VESA DDC1/
2BTM
Input Connector D-Sub 15-pin
Input Video Signal Analog:
0.7 Vpp
75 OHM, Positive
Maximum Screen Size Horizontal:
12.0" (304.1 mm)
Vertical:
9.0" (228.1 mm)
Power Source 100~264 VAC,
47~63 Hz
Environmental
Considerations
Operating Temp:
32° to 122°F
(0° to 50°C)
Storage Temp:
13° to 140°F
(-25° to 60°C)
Dot Clock 80 MHz
Maximum Resolution 1024 x 768 pixels
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Operating
Humidity:
10% to 90%
Weight 6.6 lbs. (3.0 Kg)
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Appendix
LM540
Specifications (continued)
Front Panel Buttons Auto
Brightness
Contrast
Power Switch
MENU/ Exit
External
Controls:
EPA ENERGY
STAR®
Power Consumption
(Maximum)
Functions Contrast
Brightness
Focus
Clock
H-Position
V-Position
C1
C2
RGB Color temp.
Reset
Exit
Yes
25 Watts
Optimal Viewing Mode: 1024 x 768 x 60 Hz
Regulatory
Compliance
LM540
UL, CSA, FCC,
TÜV/GS, CE,
Windows® XP Logo
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17NOV04
Factory Preset Timing Table
Appendix
LM540
Standard
VGA 720 × 400 31.47 kHz 70 Hz
SVGA 800 × 600 37.879 kHz 60 Hz
XGA 1024 × 768 48.363 kHz 60 Hz
Resolution
(in pixels)
640 × 480 31.47 kHz 60 Hz
640 × 480 35.00 kHz 66.6 Hz
640 × 480 37.50 kHz 75 Hz
800 × 600 46.875 kHz 75 Hz
832 × 624 49.725 kHz 75 Hz
1024 × 768 56.476 kHz 70 Hz
1024 × 768 60.02 kHz 75 Hz
1024 × 768 60.241 kHz 74.9 Hz
Horizontal
Frequency
Vertical
Frequency
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17NOV04
Connector Pin Assignment
Pin Number Description Pin Number Description
1 Red 9 +5V
2 Green 10 Detect Cable
3Blue11NC
4 Ground 12 DDC-Serial Data
5 Ground 13 H-Sync
6 R-Ground 14 V-Sync
7 G-Ground 15 DDC-Serial Clock
8 B-Ground
Appendix
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