Epson Powerlite 7500c Multimedia Projector Users Guide

							Problems with the Projector
119
Note: Each Help menu displays navigation buttons and descriptions 
at the bottom of the screen. Projector control functions are 
displayed as an icon in the help text.
Problems with the Projector
If you have problems with the projector, first turn it off and unplug 
it. Then plug the power cord back in and turn on the projector. If this 
does not solve the problem, check the lights on top of the projector. 
These lights alert you to problems with projector operation
. 
power light
temperature light projection lamp light
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							6    Troubleshooting             120
See the following pages for information on what to do when you see 
these warning lights or encounter other specific problems with the 
projector.
◗
The power light is flashing orange and you cannot turn on the 
projector.
The projector is cooling down. Wait until the light turns off and then 
turn on the projector.Light Color Meaning
Temperature Flashing orange The projector is too hot.
Red The projector has turned off automatically because of 
overheating.
Flashing red There is a problem with the cooling fan or temperature 
sensor. Call a service representative.
Projection
lampRed or
flashing orange and redThe lamp needs to be replaced. See “Replacing the 
Lamp” in Chapter 5 for instructions.
Flashing red There is a problem with the projection lamp or lamp 
power supply, a lamp fuse, or a circuit malfunction in 
the projector.
Power Flashing green The projector is warming up. Allow about 30 seconds.
Flashing orange The projector is cooling down.
Steady Green Power and projector lamp are on.
Steady Orange The projector is in sleep mode.
Off There is an internal projector problem, or the power to 
the projector has been cut off.
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							Problems with the Projector
121
If the Source button is pushed to switch video input sources and no 
source is connected, the projector enters a cool-down mode 
(flashing orange power light) and then goes into sleep mode (steady 
orange power light). Connect a video source, then press the Power 
button to resume. 
◗
The power light does not come on.
Turn off the projector, check that the power cable is connected 
securely both at the electrical outlet and the projector, and press the 
Power button again.
◗
Projected images get darker or start to deteriorate, or the 
projection lamp light is red.
Replace the projector lamp as described in Chapter 5.
◗
The temperature light is red.
The projector is overheating, which turns the lamp off 
automatically. Let the projector cool for a few minutes, then turn it 
back on. Make sure nothing is blocking the ventilation vents.
The air filter may be clogged. Clean it as described in Chapter 5 and 
then let the projector cool for awhile.
If the projector continues to overheat after you clean the air filter, 
the problem may be caused by damage to the cooling fan or internal 
circuits. Contact a qualified service person. 
✦
Warning: Except as specifically explained in this User’s Guide,
 do 
not attempt to service this product yourself.
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							6    Troubleshooting             122
Problems with the Remote Control
◗
The projector doesn’t respond to remote control commands.
The remote control may be too far from the projector, or at too wide 
an angle to the infrared receiver. See page 52 for details.
The remote control’s batteries may be low on power. Replace them.
Make sure the projector’s mouse cable is securely connected to both 
your computer’s mouse port and to the projector’s Mouse/COM port 
(or the main cable if you are using the ELP Link III set). See 
Chapter 1 or Chapter 4 for details.
Make sure you selected the correct COM (communication) port for 
the mouse when you set up the optional ELP Link III software. If 
necessary, you can change the COM port from the Option menu. 
See page 92 (Windows) or page 91 (Macintosh) for more 
information.
Light that is too strong, or certain types of fluorescent lighting may 
affect the projector’s infrared receivers. Dim the ambient lighting 
and turn off any fluorescent lighting. Move the projector out of 
direct sunlight.
Turn off any nearby equipment that emits infrared energy, such as a 
radiant room heater.
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							Problems with the Image or Sound
123
Problems with the Image or Sound
◗
An image does not appear on the screen.
Check that the power light is on and the lens cover is off. Also make 
sure the cables are securely connected, as described in Chapter 1.
The correct image source may not be selected. Press the Source 
button on the remote control or the control panel to choose another 
image source. 
Some screen savers appear as a blank screen. Make sure any screen 
savers on your computer are disabled while using the projector.
Note: If the Source 
button is pushed to switch video input sources 
and no source is connected, the projector enters a cool-down mode 
(flashing orange power light) and then goes into sleep mode (steady 
orange power light). Connect a video source, then press the Power 
button to resume. 
◗
A screen saver appears on the screen and will not go away.
Press the ESC key, the right mouse button, or the top multi-purpose 
button (if you are using the remote control as a mouse) to stop the 
screen saver. This will also clear any effects you have on the 
screen.You should disable any screen savers on your computer 
before using the projector.
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							6    Troubleshooting             124
◗
Only part of the computer image is displayed.
If the computer’s output resolution setting is higher than 800 
× 600 
(PowerLite 5500C) or 1024 
× 768 (PowerLite 7500C), the projector 
resizes the image. If the computer output is not compatible with this 
resizing, choose a different display setting on the computer. 
In Windows 3.x, use Windows Setup in the Main program group. In 
Windows 95/98, right-click on the desktop, select Properties, click 
the Settings tab, and use the dialog box to select the resolution you 
want. 
For a Macintosh with Mac OS 8.0 or lower, choose Control Panels 
under the Apple menu and then choose Monitors. In the Monitors 
screen, choose Options and make sure Macintosh Hi-Res Display or 
another 1024 
× 768 display is selected. For a Macintosh with Mac 
OS 8.1 or above, choose Control Panels under the Apple menu and 
then choose Monitors & Sound. In the Monitors & Sound screen, 
select a resolution from the Resolution box. For supported display 
settings, see “Supported Computers and Monitor Displays” on 
page 130.
You also may need to modify existing presentation files if you 
created them for a different resolution. See your software manual 
for specific information.
◗
The message NO SIGNAL is displayed.
An image source not connected to the projector is selected, the 
signal is not being output from the computer, or the signal is not 
reaching the projector. Make sure the connectors are securely 
attached to both the projector and the image source. Then check that 
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							Problems with the Image or Sound
125
the image source is selected correctly. If your projector is attached 
to a Macintosh, make sure that the DIP switches on your Macintosh 
desktop adapter are set correctly. (See your Macintosh 
documentation if you need instructions.) When NO SIGNAL is 
displayed, you cannot access the Video menu.
◗
A blank screen is displayed.
The computer signal cannot be interpreted by the projector. Verify 
the display format (see page 130). When you see a blank screen, you 
cannot access the projector menus.
◗
The image or parts of the image are blurred or not in focus.
Adjust the Brightness and Contrast settings on the Video menu. If 
you’re viewing a computer image, also try adjusting the Tracking 
and Sync buttons on the projector’s control panel or remote control.
There may be dirt or smears on the lens. Clean the lens as described 
on page 110.
◗
The colors of the image are not right.
The color balance may be incorrect. If you’re displaying a computer 
image, use the Color option in the Video menu to adjust the balance 
of red, green, and blue. If you’re displaying video, adjust the Color 
and Tint (NTSC only) settings on the Video menu.
Check your monitor’s color balance if you’re displaying a computer 
image.
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◗
There is no sound.
First check that the volume setting is not turned all the way down 
and that the audio/video cable is securely attached to both the 
projector and the audio source. Also, make sure that the Mute button 
is not enabled.
The wrong source may be selected. Press the Source button on the 
remote control or control panel to select the proper source.
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							127
7Technical Specifications General
Type of display Poly-silicon Thin-Film Transistor
(TFT), active matrix
Size of liquid crystal panels    Diagonal: 0.9 inches (22.9 mm) 
Lens F=1.7–2.0, f=37–48 mm
Resolution 5500C: SVGA 800 
× 600 pixels
7500C: XGA 1024 × 768 pixels
Color reproduction 24 bit, 16.7 million colors
Image brightness 5500C: 650 lumens (ANSI)
7500C: 800 lumens (ANSI)
Image size 19-300 inches
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							7    Technical Specifications             128
Projection distance 3.3–53.46 feet (1.1–16.3 meters)
Projection methods Front, rear, upside-down (ceiling
mount)
Internal speaker system 2 
× 1 W SRS 3D stereo output
Optical aspect ratio 4:3 (horizontal:vertical)
Zoom ratio 1:1.3
Tilt angle 0° to 12°
Supported video 
interface standards NTSC, NTSC 4.43, PAL, PAL N,
PAL M, PAL 60, SECAM
Projector 
Lamp
Type UHE (Ultra High Efficiency)
Power consumption 120 W
Lamp life 2000 hours at 50% brightness
Part number ELPLP06
Remote 
Control
Range 32.8 feet (10 meters)
Batteries Alkaline AA (2)
Mouse
Compatibility
Supports PS/2, serial, ADB
Repeater Interface
Supports Xantech
® IR repeaters, 
3.5 mm stereo mini-jack
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