AOC LM740 User Manual

LM740  
17” TFT LCD Monitor  
User’s Manual  
By Envision Peripherals  
Inc.  
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 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.  
Do not install the monitor in a location near heat sources such as radiators or  
air ducts, or in a place subject to direct sunlight, or excessive dust or  
mechanical vibration or shock.  
The monitor should be operated only from 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. 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 an electrician install the correct outlet or 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  
period 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  
ii  
circuit parts causing a fire or electric shock. Never spill liquids on the  
monitor.  
Do not attempt to service the monitor by yourself. Opening or removing  
covers can expose you to dangerous voltages and other hazards. Please  
refer all servicing to qualified service personnel.  
Do not pull or bend the power cable and signal cable or place the monitor or  
any heavy objects on the cables. If the cables are damaged, they may cause  
fire or electric shock.  
If you notice any abnormal phenomenon such as strange noise, smoke or  
smells, unplug the monitor and contact your dealer or the nearest service  
center immediately.  
When moving the monitor, always turn off the switch, unplug the monitor,  
and disconnect the signal cable. If the cables are not properly disconnected  
when moving the monitor, it may cause fire or electric shock.  
Do not touch the plug with wet hands. Pulling or inserting the plug with wet  
hands may cause electric shock.  
To disconnect the power cable or signal cable, always pull the cable by the  
plug. Never pull on the cable as this may cause 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.  
ERGONOMICS RECOMMENDATIONS  
Do not operate the monitor in a dark room or against a bright background. For optimal  
viewing comfort, the monitor should be just below eye level and 30-60 cm (16-24 inches)  
away from your eyes. When using the monitor over a prolonged period of time, a  
ten-minute-break per hour is recommended.  
iii  
GENERAL NOTES  
The following symptoms are normal with 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 panel used in this monitor is a very high technology product with  
3,932,160 thin film transistors giving you fine picture details. Occasionally, a  
few non-active pixels may appear on the screen as a fixed point of red,  
green, blue, white or black. Please note that this does not indicate a  
defective panel.  
Due to the nature of the LCD screen, an after-image of the previous screen  
may remain after switching the image when the same image has been  
displayed for a long time. The monitor will slowly recover from this.  
LCD monitors have a fixed size & number of pixels. Due to this, an  
interpolation is necessary to operate the monitor in a resolution below its  
native resolution which may slightly de-grade the display quality. Therefore,  
it is highly recommended to operate this monitor at its native resolution of  
1280x1024 @ 60Hz.  
iv  
OTHER NOTES  
The screen surface is very soft. Do not rub, touch or tap the screen surface  
with sharp object such as pen or pencil. This contact may scratch or  
damage the screen. These damages are not covered under the warranty.  
Turn your computer OFF before installing your new monitor. Refer to your  
computer manual for the proper shut down procedure.  
Save the original shipping carton and packing materials, as they will come in  
handy if you ever have to ship your monitor.  
For maximum protection, repackage your monitor as it was originally packed  
at the factory.  
To keep the monitor looking new, periodically clean the case & surface of the  
TFT-LCD panel with a soft non-fibrous cloth lightly dampened with a glass  
cleaner. Do not use any paper products to clean the screen. Never spay the  
glass cleaner directly on the monitor. Never use strong solvents such as  
thinner, benzene, or abrasive cleaners, since these will damage the case &  
panel. As a safety precaution, always unplug the monitor before cleaning it.  
v
Disclaimer  
Envision Peripherals Inc. makes no representations or warranties, either expressed  
or implied, with respect to the contents hereof and specifically disclaims any  
warranties, merchantability or fitness for any particular purpose. Further, Envision  
Peripherals Inc. reserves the right to revise this publication and to make changes  
from time to time in the contents hereof without obligation to notify any person of such  
revision or changes.  
Microsoft and Windows are registered trademarks of Microsoft Corporation.  
All other trademarks remain the property of their respective owners.  
Reference Information  
For future reference, write the following information about your monitor in  
the space below. The serial number is found on the back of the product or  
on the bottom of its stand.  
Monitor Information  
Product Name:  
Serial Number:  
Date of Purchase:  
Dealer Information  
Dealer:  
LM740  
Telephone  
Number:  
Address:  
vi  
Table of Contents  
1 Important Safety Instructions...........................................i  
2 Features.............................................................................2  
3 Unpacking the Monitor.....................................................3  
Installation and Removal of the Base…………………….3  
4 Hardware Installation .......................................................4  
5 Windows driver installation .............................................5  
6 Setting the Display Resolution........................................6  
Choosing the Best Resolution..............................6  
Supported Graphics Modes and Refresh Rate  
Selection ...............................................................7  
7 Adjusting the Monitor..................................................9-12  
8 Frequently Asked Questions ....................................13-15  
9 Specifications ............................................................16-17  
vii  
1
Important Safety Instructions  
Please read the following safety instructions before installing or cleaning your  
AOC monitor:  
1. Unplug the monitor’s power cable from the wall outlet before cleaning. Do  
not use liquid or aerosol cleaners. Use a soft cloth to clean the monitor  
housing.  
2. Slots and openings on the back or top of the cabinet are provided for  
ventilation. They must not be blocked or covered. This product should  
never be placed near or over a radiator or other heat source, or used in a  
built-in installation unless proper ventilation is provided.  
3. Never push objects of any kind, or spill liquid of any kind into this product.  
4. Do not attempt to service this product yourself as opening or removing  
covers may expose you to dangerous voltages or other hazards.  
5. If any abnormal operation or accident (such as dropping the unit) occurs,  
disconnect the monitor from the wall power outlet and contact qualified  
service personnel.  
1
2
Features  
Your AOC LM740 Monitor features:  
SXGA (1280 x 1024 pixel) Resolution LCD Panel  
High Brightness – 270 cd/m2 (typical)  
High Contrast Ratio – 500:1 (typical)  
True Colour Display  
With FRC support for 16.7M colours, the AOC LM740 monitor offers you  
better image quality.  
High Quality Expansion  
With any resolution within the monitor’s specified range, your AOC  
LM740 monitor can expand the image to full screen.  
Auto Adjustment Function  
The auto-adjustment key automatically optimises the image.  
Plug and Play Compatibility with MicrosoftWindows95, 98, 2000,  
Me and XP  
Space Saving - only 199 mm deep  
Light Weight - only 4.0 kg  
Lower Power Consumption  
40 W maximum during operation  
Power Saving  
Power management complies with EPA ENERGY STAR standard. When  
the system is idle (in monitor off mode), the monitor automatically cuts its  
power consumption to less than 1 W.  
On Screen Display  
Allows you to adjust all settings simply using on-screen menus.  
2
3
Unpacking the Monitor  
Please check that the following items are included with your monitor. If they are  
missing or damaged, please contact your place of purchase immediately  
.
Monitor  
1 pc  
Signal Cable  
1 pc  
Power Cable  
1 pc  
QSG  
(Quick Start  
Guide)  
1 pc  
CD User’s  
Manual  
Installation and Removal of the Base  
1. Installation  
2. Removal  
* Lay the monitor face down on the edge  
of a table. Make sure to use a soft  
padding to protect the screen of the  
monitor.  
3
4
Hardware Installation  
Your monitor is equipped with an automatic power supply with a voltage range  
from 100 to 240 Volts AC at a frequency of 50 to 60 Hz. Make sure that your  
local power supply is within the supported range. If you are unsure, please  
contact your electricity supplier.  
To install your AOC LM740 monitor:  
1. Make sure that the power to the computer and the power to the monitor are  
both turned off.  
2. Connect the D-sub video cable from the monitor’s VGA input connector to  
the VGA output connector of the computer‘s graphics card.  
3. Connect the power cord from the monitor’s power jack to an AC power  
socket. Please make sure, that you have easy access to the power socket  
so you can disconnect the unit from the power socket should you need to.  
1. Power cable  
2. D-sub Video Cable  
4
5
Windows driver Installation  
The AOC LM740 is fully Windows compatible so no specific windows drivers  
are required to be loaded.  
Windows 98, ME, and 2000  
The first time you start Windows after connecting your new monitor, the system  
will detect the monitor and automatically start the Add New Hardware wizard.  
Just follow the prompts to load the native Plug and Play drivers.  
Windows XP  
The first time you start Windows after connecting your new monitor Windows  
XP will automatically load the native Plug and Play drivers.  
5
6
Setting the Display Resolution  
Choosing The Best Resolution  
All Liquid Crystal Displays (LCDs) have a fixed resolution that is the same as  
the maximum resolution that may be displayed on the LCD. In the case of the  
LM740 the LCD resolution is 1280 x 1024 pixels. This is also known as the  
“native” resolution of the monitor. Lower resolutions can be displayed at full  
screen through an interpolation circuit. Because the lower resolution must be  
expanded, the quality of the displayed image is not as good as that available  
when the native resolution is displayed. For optimal performance from any LCD  
monitor, you must use the monitor’s native resolution.  
If you are using Windows 95, 98, 2000, Me, XP or NT 4.0, you can change the  
resolution as follows:  
1.  
2.  
Double-click the Display icon in the control panel.  
From the Display Properties dialogue box, select the Settings tab.  
There is a slider on the right-hand side in the middle of the dialogue box  
that alters the displayed resolution. Set the resolution to 1280 x 1024.  
For Windows NT users only: select a refresh rate of either 60Hz or 75 Hz  
and click Test. A test pattern will be displayed. Make sure that there are  
no error messages shown by the monitor. If an error message is  
displayed, check the resolution and refresh rate settings or choose a  
different refresh rate.  
3.  
4.  
Click OK to close Display Properties.  
6
Supported Graphics Modes and Refresh Rate Selection  
There is no need to choose the highest possible refresh rate when using an  
LCD monitor. It is not technically possible for an LCD monitor to flicker. Even at  
a refresh rate of 60 Hz you will get an absolutely flicker-free image.  
For best results, it is important that you set the graphics adaptor to use one of  
the monitor’s preset display modes shown in Table 1 on the next page. Other  
graphics signals may be displayed poorly or not at all. Note that the LM740’s  
preset modes correspond to VESA or Apple Macintosh standard graphics  
signals for these resolutions. All recent models of graphics adaptor should be  
able to support these modes. For the native resolution of 1280 x 1024 pixels,  
for example, refresh rates of 60, 70 and 75 Hertz are supported.  
With Windows 95, 98, ME, 2000 or XP you can change the refresh rate of the  
graphics signal as follows:  
1. Double click the Display icon in the control panel.  
2. From the Display Properties dialogue box, select the Settings tab and  
click the Advanced Properties button.  
3. For Windows 95, 98, and ME select the Adapter tab, for 2000 and XP  
select the Monitor tab. The refresh rate selection field is located in the  
centre, at the bottom of the dialogue box.  
4. Choose a refresh rate that corresponds with one of the factory modes from  
the table below.  
5. Click Apply, and then OK twice.  
Please Note:  
Graphics modes that are not listed in the table may not be supported. For  
an optimal picture it is recommended that you choose a graphics mode  
with a resolution of 1280 x 1024 pixels that is listed in Table 1 on the next  
page. Resolutions of 640 x 480, 800 x 600, 1024 x 768 and 1280 x 1024  
pixels are supported. The default setting may require some adjustment  
before use.  
The displayed image may show some distortion or noise that can be  
7
caused by the signal from the VGA card if it does not correspond with the  
usual standard. This is not however, a problem with the monitor. If it is still  
visible after using the Automatic adjustment, you can usually improve the  
displayed image by manually adjusting the phase, horizontal position and  
pixel frequency settings using the "Geometry" menu. See Chapter 7,  
Adjusting the Monitor, for more details.  
When you shut Windows down you may see interference lines on your  
screen. This caused by the manner in which Windows controls the  
graphics card at this point and is normal with all LCD monitors.  
To extend the service life of the product, we recommend that you use your  
computer's power management functions to turn the monitor off after  
extended idle periods.  
Incoming display mode (Input timing)  
Horizontal  
Frequency  
(kHz)  
Vertical  
Frequency Frequency  
Dot Clock  
Resolution  
Remark  
(Hz)  
(MHz)  
25.17  
28.32  
25.18  
31.5  
640x350  
720x400  
640x480  
640x480  
640x480  
800x600  
800x600  
800x600  
800x600  
1024x768  
1024x768  
1024x768  
1280x1024  
1280x1024  
31.47  
31.47  
31.47  
37.86  
37.50  
35.16  
37.88  
48.08  
46.86  
48.36  
56.48  
60.02  
64.00  
80.00  
70.08  
70.08  
60.00  
72.80  
75.00  
56.25  
60.32  
72.19  
75.00  
60.00  
70.10  
75.00  
60.00  
75.00  
DOS  
DOS  
DOS  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
VESA  
31.5  
36.00  
40.00  
50.00  
49.50  
65.00  
75.00  
78.75  
108.00  
135  
Table 1  
8
7
Adjusting the Monitor  
Picture Optimisation  
The easiest way to obtain an optimal picture is by using the Auto button for 2  
seconds. This only works reliably if the graphics adaptor is set to use one of the  
monitor’s factory modes (see Table 1 in the previous chapter) and if you are  
displaying a suitable stationary image (such as the windows desktop).  
The monitor will remember the settings obtained by the auto calibration  
settings and use them whenever you turn the monitor on. Note that you may  
need to readjust the monitor if it is connected to a different computer or if the  
computer’s graphics adaptor is replaced.  
If you are still not satisfied with the result, you can enhance the image by using  
the monitor’s manual adjustment functions.  
OSD Adjustment  
Adjustments to the displayed image are made using the On-Screen Display  
(OSD) and the buttons on the front of the monitor.  
9
(from left to right)  
Enter OSD menu.  
Menu  
Enter submenus or select items within OSD menu.  
Move the selection cursor upwards within the OSD menu.  
Move the selection cursor downwards within the OSD menu.  
Adjust OSD functions. (Decrease)  
!
"
#
$
Adjust OSD functions. (Increase)  
Automatically adjust the vertical, horizontal position, pixel  
phase and pixel clock.  
SELECT  
/AUTO  
Exit OSD menu/submenus.  
Power button  
POWER  
OSD MENU:  
Brightness & Contrast Adjustment  
10  
Tracking Adjustment  
Position Adjustment  
11  
Color Adjustment  
Other  
12  
8
Frequently Asked Questions  
The image is blurred, how can I get the best quality picture?  
Read chapter 6, Setting the Display Resolution, and select a graphics  
signal with the correct resolution and refresh rate. Then read chapter 7,  
Adjusting the Monitor, and make adjustments to the displayed image  
based on these instructions.  
Have you used a VGA extension cable?  
If so, remove the extension cable and check the displayed image. Has the  
image quality improved? Optimise the image using the procedures in  
chapter 7 with the extension cable removed. Reconnect the extension  
cable once the image has been optimised. Depending on the  
characteristics and type of the extension cable, some blurring or distortion  
may occur due to conduction losses of the extension cable. You can  
minimise these losses by using an extension cable with better conduction  
quality or with a built-in booster.  
Does the blurring only occur at resolutions lower than the native  
(maximum) resolution?  
Please read chapter 6, Setting the Display Resolution. Select a graphics  
signal that uses the monitor’s the native resolution (1280 x 1024 pixels).  
Why does the image look yellow, blue or pink instead of showing the  
correct colours?  
The most common cause of this problem is a loose VGA signal cable or  
connector. Check that the cable is securely connected to the computer.  
Check the VGA signal cable for damage. If any pins are bent or broken off,  
contact your dealer or an authorized Envision Peripherals Inc. service  
agent  
13  
No image is displayed, what can I do?  
Check that the light (LED) next to the monitor’s power button is lit and is  
green in colour. If the LED is green, press the MENU button on the monitor  
to access the On Screen Display. If the message NON PRESET MODE  
appears there, please read chapter 6, Setting the Display Resolution and  
reset the graphics card to one of the monitor’s supported graphics signals.  
If the LED is orange the monitor is in power saving mode. Press a button  
on the computer keyboard or move the mouse to wake the computer. If that  
does not help, check that the VGA cable is securely plugged into the  
computer. Also check the pins of the VGA cable’s connector. If any pins are  
bent or broken off, then contact your dealer (see Chapter 10 for details).  
If the LED is not lit at all, check that the monitor is plugged into the power  
supply mains socket and that the power switch is turned on. Check that the  
monitor’s power switch is also turned on.  
The image is or distorted, flashes or flickers:  
Check that the monitor’s signal cable is securely connected to the  
computer.  
Read the chapters 6 and 7 of this manual, then select the correct  
resolution, refresh rate and make adjustments based on these instructions.  
The image is displaced in one direction:  
Use the Hor. Position (horizontal position) adjustment in the Geometry  
menu of the monitor’s OSD to reposition the image.  
Read the chapters 6 and 7 and then select the correct resolution, refresh  
rate and make adjustments based on these instructions.  
The display shows NO SIGNAL error message:  
Check that the monitor’s signal cable is securely connected to the  
computer.  
The monitor is in power saving mode. Press a button on the computer  
keyboard or move the mouse to wake the computer. If that does not help,  
check that the VGA cable is securely plugged into the computer.  
14  
The display shows OUT OF FREQUENCY error message:  
Read chapter 6, Setting the Display Resolution, and select a graphics  
signal with the correct resolution and refresh rate.  
15  
9
Specifications  
Model: AOC LM740  
Display Characteristics  
Display Type  
17“ active matrix Thin Film  
Transistor Liquid Crystal Display  
Viewable Diagonal Area  
Native (Maximum) Resolution  
Colors  
43.18 cm / 17”  
1,280 x 1,024 pixels  
16.7 million (6bpp+dithering)  
500:1 (typical)  
Contrast Ratio  
Brightness  
270 cd/m² (typical)  
12 ms (typical)  
Response Time  
Viewing Angle (Horizontal, Vertical)  
Dot Pitch  
70°/70° , 70°/70°(typical)  
0.264 mm  
User Interface  
Controls  
Mains power switch, Automatic  
image adjustment, 6 OSD buttons  
On-Screen Display Functions  
Contrast, Brightness, Vert. & Hor.  
Image Position, Phase, Pixel  
Clock, Colour Management, OSD  
Position, OSD Language, Status  
Indicator  
16  
Input Signal  
Line Frequency  
31 - 83kHz multi-frequency  
56 - 75Hz  
Image Frequency (Refresh Rate)  
Within the parameters detailed in  
chapter 7  
Video Signal  
RGB analogue (Positive polarity)  
0.7 Vpp/75 Ohm  
Synchronization  
TTL separate, composite TTL  
15-pin mini D-sub cable  
Signal Connection  
Physical Characteristics  
Power Management  
Energy Star  
40 Watts  
Maximum Power Consumption  
Power Saving Mode  
< 1 Watts  
Operating Voltage  
Automatic switched mode power  
supply, 100 - 240 V, 50 - 60 Hz  
Dimensions (W x H x D)  
Weight  
381 x 426 x 199mm  
4.0 kg  
Temperature (Operating)  
Air Humidity (Operating)  
Regulatory Certification  
Safety  
5°C - 40°C  
20% - 85%  
CSA, cULus, TUV/GS  
FCC, CE,  
EMI/EMC  
Other  
17  

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