LM540
LM540
15 inch TFT LCD Monitor
User’s
Manual
by Envision Peripherals, Inc.
Before operating your monitor, please read this
manual thoroughly.
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For Your Safety
LM540
• 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.
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
• 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.
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.
• Do not overload power strips and extension
cords. Overloading can result in fire or electric
shock.
• 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. 3.5A.
• The wall socket should be installed near the
equipment and should be easily accessible.
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For Your Safety
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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 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.
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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Before You Operate the Monitor
LM540
Installing & Removing the Base
General Features:
Package Contents
• 38.1cm(15") TFT Color LCD Monitor
The box that your monitor was shipped in should
have included the following items:
• Crisp, Clear Display for Windows
1. LM540 LCD Monitor
• Supports Resolutions up to 1024 X 768 pixels
@75Hz, (1024 x 768 @ 60Hz Recommended)
2. Power Cord
3. Windows 95/98/2000/ME/XP INF Driver Disk
4. Quick Start Guide
• EPA ENERGY STAR®
• Ergonomic Design
5. Booklet (Containing Warranty & Safety
Information)
• Space Saving, Compact Case Design
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Before You Operate the Monitor
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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 your LCD monitor's
Power Adapter.
If the AC outlet is not grounded (with three
holes), install the proper grounding adapter (not
supplied).
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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Before You Operate the Monitor
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Adjusting the Viewing Angle
For optimal viewing, adjust the monitor's angle to
your own preference.
• Do not touch the LCD screen when you
change the angle. It may cause damage or
breakage.
• Hold the stand firmly when you change the
monitor's angle.
• Be careful to avoid pinching your hand in the
swivel base.
• You can adjust the monitor's angle from
-5° to 25°.
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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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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
LCD monitor.
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Operating Instructions
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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.
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.
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.)
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.
17NOV04
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Operating Instructions
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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
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Plug & Play DDC1/2B Feature
How to Install INF & ICM File
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.
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.
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.
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Technical Support (FAQ)
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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
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 Envision monitor drivers are installed.
(AOC monitor drivers are available at: www.AOCdisplay.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.
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 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.
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.
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Technical Support (FAQ)
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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: C1 or C2.
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
• 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)
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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
60 Hz
800 x 600
60.3 Hz
70 Hz
800 x 600
800 x 600
832 x 624
1024 x 768
1024 x 768
1024 x 768
1024 x 768
72.2 Hz
75 Hz
70 Hz
70 Hz
74.5 Hz
60 Hz
72.8 Hz
75 Hz
70 Hz
66.67 Hz
56.3 Hz
75 Hz
74.92 Hz
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Appendix
LM540
Specifications
Plug & Play
VESA DDC1/
2BTM
LCD
Panel
Driving
system
TFT Color LCD
15.0" (38.1 cm)
Input Connector
D-Sub 15-pin
Size
Input Video Signal
Analog:
0.7 Vpp
75 OHM, Positive
Pixel pitch
(0.297 mm) (H) x
(0.297 mm) (V)
Maximum Screen Size
Power Source
Horizontal:
12.0" (304.1 mm)
Viewable
angle
120° (H) 100° (V)
Vertical:
9.0" (228.1 mm)
Input
Response
time
25 milliseconds
Video
Red, Green, Blue
Analog Interface
100~264 VAC,
47~63 Hz
Separate
Sync.
H/V TTL
Environmental
Considerations
Operating Temp:
32° to 122°F
(0° to 50°C)
H-Frequency
V-Frequency
30 kHz - 63 kHz
50-75 Hz
Storage Temp:
13° to 140°F
(-25° to 60°C)
Display Colors
16 million colors
Operating
Humidity:
Dot Clock
80 MHz
10% to 90%
Maximum Resolution
1024 x 768 pixels
Weight
6.6 lbs. (3.0 Kg)
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Appendix
LM540
Optimal Viewing Mode: 1024 x 768 x 60 Hz
Specifications (continued)
Front Panel Buttons
Auto
Brightness
Contrast
Power Switch
MENU/ Exit
External
Controls:
Functions Contrast
Brightness
Focus
Clock
H-Position
V-Position
C1
C2
RGB Color temp.
Reset
Exit
EPA ENERGY
STAR®
Yes
Power Consumption
(Maximum)
25 Watts
Regulatory
Compliance
UL, CSA, FCC,
TÜV/GS, CE,
Windows® XP Logo
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Appendix
LM540
Factory Preset Timing Table
Resolution
(in pixels)
Horizontal
Frequency
Vertical
Frequency
Standard
VGA
720 × 400
31.47 kHz
70 Hz
640 × 480
640 × 480
640 × 480
800 × 600
800 × 600
832 × 624
1024 × 768
1024 × 768
1024 × 768
1024 × 768
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
60 Hz
66.6 Hz
75 Hz
60 Hz
75 Hz
75 Hz
60 Hz
70 Hz
75 Hz
74.9 Hz
SVGA
XGA
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Appendix
LM540
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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