Epson Powerlite 720c Multimedia Projector Users Guide

							Solving Problems65
The message Not Supported is displayed.
Make sure your computer’s resolution doesn’t exceed UXGA and the 
frequency is supported by the projector (see page 93). If necessary, 
change your computer’s resolution setting as described below. 
Only part of the computer image is displayed.
■Make sure the image Position setting is correct on the Video 
menu. See page 40 for more information.
■Make sure your computer’s resolution setting is correct. Ideally, it 
should be 1024 
× 768 to match the projector’s native resolution. 
If this option isn’t available, select one of the other compatible 
video formats listed on page 93. 
■Windows:
Right-click the desktop, select 
Properties, click the Settings 
tab, and select a different resolution. 
■Macintosh OS 9.x:
On the Apple menu, choose 
Control Panels, then click 
Monitors or Monitors and Sound. Select a different 
resolution. 
■Macintosh OS X:
On the Apple menu, choose 
System Preferences, then 
click 
Display. Select a different resolution.
■You also may need to modify existing presentation files if you 
created them for a different resolution. See your software 
documentation for specific information.
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							66Solving Problems
The image isn’t rectangular, but trapezoid-shaped.
■Make sure the projector isn’t placed off to one side of the screen, 
at an angle, or the image won’t be rectangular. Place the projector 
directly in front of the center of the screen, facing the screen 
squarely.
■If you’ve tilted the projector upward by extending the legs, the 
image will be broader at the top. Turn on Auto Keystone 
correction as described on page 45 or hold down the   or   
side of the 
Keystone button on top of the projector until the 
image is rectangular.
The image contains static or noise.
■If you’re using a computer cable longer than 6 feet, or an 
extension cable, the image quality may be reduced.
■Keep your computer and video cables separated from the power 
cord as much as possible to prevent interference.
■The video signal may be split between the computer and the 
projector. If you notice a decline in the projected image quality 
when the image is displayed simultaneously on your laptop 
computer and the projector, turn off the laptop’s LCD display.
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							Solving Problems67
The image is blurry.
■Adjust the focus using the focus ring.
■There may be dirt or smears on the lens. Clean the lens as 
described on page 52.
■Make sure the lens is not fogged by condensation. You may need 
to wait before using the projector after moving it from a cold 
environment.
■Adjust the Sharpness setting on the Video menu (see page 40). 
When you change video settings, you should be able to see the 
effect on the screen immediately. If you’re projecting from a 
computer, you may also need to adjust the Tracking and Sync as 
described in the next section. If you don’t like the new settings, 
you can always select 
Reset to return to the factory default 
settings.
You see vertical stripes or the image still looks blurry after 
trying the solutions in the previous section.
■If you’re projecting from a computer and displaying an image that 
contains a lot of fine detail, you may notice one or more vertical 
stripes or bands, or some of the characters may look heavy or 
blurred. Press the 
Auto button on the remote control. This resets 
the projector’s tracking and sync settings.
■If further adjustment is needed, you can fine-tune the Tracking 
and 
Sync settings manually using the Video menu as described 
on page 40. 
1. Fill the screen with an image containing fine detail when 
making these adjustments. For example, in Windows you can 
select a pattern to appear as your desktop background. If this 
option isn’t available, try projecting black text on a white 
background.
2. Adjust the 
Tracking to eliminate vertical stripes. 
3. Adjust the 
Sync to increase the sharpness of the image.
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							68Solving Problems
The colors of the image are not right.
■If you’re displaying a computer image, use the Color Mode 
option in the projector’s Video menu to adjust the color. If you’re 
displaying video, adjust the 
Color, Tint, and Gamma settings on 
the Video menu. 
■Try adjusting the Color Temp setting on the Advanced menu.
■Check your computer display settings to correct the color balance.
There is no sound.
■Try turning up the volume (see page 42). 
■If you’re using a VCR or other video source, make sure the 
volume on your VCR is not turned all the way down or muted. 
Also, make sure the cables are connected correctly, as described in 
Chapter 1.
■If your presentation includes computer audio, make sure the 
volume control on your computer is not turned all the way down 
or muted. Make sure the audio cable is securely connected to both 
the projector and your computer’s   headphone jack or
 audio out jack. See page 14 (for laptops) or Appendix A (for 
other systems).
■Make sure the Windows volume controls on your computer are 
not turned all the way down or set to Mute. Check this by 
clicking the volume control in your Windows System Tray (lower 
right corner of the screen). 
■Make sure the A/V Mute button is not enabled.
■The wrong source may be selected. Press the Source button on 
the projector—or the 
Computer or S-Video/Video button on 
the remote control—to select the correct source.   
note
Because of the different 
technologies used, your 
projected image may not 
exactly match the colors on 
your laptop or computer 
monitor.
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							Solving Problems69
Solving Problems with the Remote 
Control
The projector doesn’t respond to remote control commands.
■Make sure the tape has been removed from the battery tray as 
described on page 32. 
■Make sure you are within 20 feet of the projector, and within 
range of the projector’s front or back sensor (approximately 30° to 
the left or right and 15° above or below).
■The remote control battery may not be installed correctly or may 
be low on power. Change the battery as described on page 32.
■Dim the room lights and turn off any fluorescents. Make sure the 
projector is not in direct sunlight. Strong lighting, especially 
fluorescent lights, may affect the projector’s infrared receivers.
■Turn off any nearby equipment that emits infrared energy, such 
as a radiant room heater.
You can’t control the mouse pointer with the remote 
control.
■Make sure the mouse cable is securely connected to both your 
computer’s mouse port or USB port and the projector’s mouse 
port. For details, see page 13 (for laptops) or Appendix A (for 
other systems).
■Turn off Link 21L in the Advanced menu (see page 46).
■To use the USB mouse connection on a PC, your system must 
have a “clean” installation of Windows 98, Windows Me, 
Windows XP or Windows 2000. The connection may not work 
correctly if your system was upgraded from Windows 95.
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							70Solving Problems
Where To Get Help
EPSON provides technical assistance through electronic support 
services 24 hours a day, as listed in the following table.
Telephone Support Services
To use the EPSON PrivateLine Support service, call (800) 637-7661 
and enter the PIN on the EPSON PrivateLine Support card included 
in your owner’s kit. This is the fastest way of speaking to a live 
representative, and it’s free. This service is available 6
AM to 6PM, 
Pacific Time, Monday through Friday, for the duration of your 
warranty period.
You may also speak with a projector support specialist by dialing one 
of these numbers:
■U.S.: (562) 276-4394, 6AM to 6PM, Pacific Time, Monday 
through Friday 
■Canada: (905) 709-3839, 6AM to 6PM, Pacific Time, Monday 
through Friday 
Toll or long distance charges may apply.
Service Access
World Wide Web From the Internet, you can reach EPSON’s 
product support page at 
http://support.epson.com. After selecting 
your product, you can access troubleshooting 
information, download product 
documentation, and receive technical advice 
through e-mail.
Presenters Online  Access tips, templates, and training for 
developing successful presentations at 
http://www.presentersonline.com
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							Solving Problems71
Before you call, please have the following information ready:
■Product name (EPSON PowerLite 720c or EPSON 
PowerLite 730c)
■Product serial number (located on the bottom of the projector)
■Computer or video configuration
■Description of the problem
You can purchase screens, carrying cases, or other accessories 
from EPSON at (800) 873-7766 or by visiting the EPSON Store at 
www.epsonstore.com (U.S. sales only). In Canada, please call 
(800) 463-7766 for dealer referral
.
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							72Solving Problems
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							Appendix A: Connecting to Additional Equipment73
A
Appendix A: Connecting to 
Additional Equipment
This appendix explains how to connect the projector to a desktop 
computer or Macintosh, or a high-end workstation. 
The following information is covered:
■Installing the projector
■Connecting to a PC desktop computer
■Connecting to a desktop Macintosh
■Connecting to a high-end workstation
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							74Appendix A: Connecting to Additional Equipment
Installing the Projector
The projector can be installed for three different viewing setups:
front projection, ceiling mounting, or rear projection onto a 
semi-transparent screen.
To project from overhead, you’ll need to select 
Ceiling in the 
projector’s Advanced menu. To project from the rear, select 
Rear 
Proj
. See page 46 for more information.
If you’re ceiling-mounting the projector and you place it above screen 
level, you’ll have to tilt it down to position the image on-screen. This 
causes the image to lose its rectangular shape. You can then correct the 
distortion by using the 
Keystone or Auto Keystone function in the 
projector’s menu system (see page 45).
If you place the projector’s lens so it’s level with the top of the screen, 
the image will be rectangular and you won’t have to adjust it. If you 
place the lens lower than the top of the screen, you’ll have to tilt the 
projector upward if you want to fill the whole screen with the image.
Connecting to a PC Desktop Computer 
You can connect the projector to any IBM® -compatible PC. This 
section includes instructions for the following:
■Connecting the computer cable 
■Connecting the mouse cable (if you want to use the remote 
control as a mouse)
■Connecting an optional audio cable (if you’ll be projecting 
with audio)
When you connect the projector to a desktop computer, you cannot 
view your display on the computer monitor.
Follow the steps in each section for the cables you need to connect. 
Before beginning, turn off the projector and computer if they are on.
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