Epson Powerlite 7550c Users Guide

							4    Using ELP Link III             128
2. Select the desired gamma correction:
Gamma 1  Provides the greatest degree of correction (a 
dynamic image with a lot of contrast).
Gamma 2 
Provides an image between Gamma 1 and Gamma 
3.
Gamma 3  Provides a natural image.
3. Click Pattern Display to display a test pattern with the gamma 
correction applied. If you’re not satisfied with the image, repeat 
steps 2 and 3 using a different setting.
4. Click Close when you’re finished. 
 
Running ELP Link III Without the Projector
You can run the ELP Link III software without the projector 
connected if you want to prepare for a presentation and the projector 
isn’t available. You can assign new functions to the Effects buttons 
on the remote control, then save your changes as a set. You can 
assign functions to your keyboard or define a key macro to use with 
one of the Effects buttons. You can also create and save a new user 
logo, although you can’t download it to the projector until the 
projector is connected and operating. 
To run ELP Link III without the projector connected, select 
Unconnected and Execute from the Option menu.
Note: Always deselect this setting before exiting ELP Link III so the 
program starts correctly the next time you use it. 
						

							Running ELP Link III Without the Projector
129 
						

							4    Using ELP Link III             130 
						

							131
5Maintenance
Y
our projector needs little maintenance. However, you should do 
the following:
p
Clean the lens so dirt or smears don’t appear on the screen. 
p
Clean the projector case when necessary.
p
Periodically clean the air filter at the bottom and rear of the 
projector. A clogged air filter can block ventilation needed to 
keep the projector from overheating. 
p
Replace the lamp and air filter as needed. (If any other part 
needs replacing, contact your dealer or a qualified service 
person.) 
						

							5    Maintenance             132
p
When transporting the projector, follow the packing guidelines 
on page 137 to avoid damaging the delicate internal 
components.
Warning: Before you clean any part of the projector, turn it off and 
unplug the power cord and any other cables that are attached. 
Never open any cover on the projector, except the lamp and filter 
covers. Dangerous electrical voltages in the projector can cause 
severe injury. Don’t try to perform any servicing other than the 
maintenance procedures explained in this chapter. Refer all other 
servicing to qualified service personnel.
Cleaning the Lens 
Clean the lens whenever you notice dirt or dust on the surface. 
Lightly wipe the lens surface with a soft, dry, lint-free cloth. To 
remove dirt or smears on the lens, moisten a soft cloth with an 
alcohol-based cleaner and gently wipe the lens surface.
Cleaning the Projector Case 
To clean the projector case, first unplug the power cord. To remove 
dirt or dust, wipe the case with a soft, dry, lint-free cloth. To remove 
stubborn dirt or stains, moisten a soft cloth with water and a mild 
detergent. Then wipe the case. 
Don’t use alcohol, benzene, thinner, or other chemical detergents. 
These can cause the case to warp. 
						

							Cleaning the Air Filter
133
Cleaning the Air Filter 
Clean the air filter at the bottom of the projector after every 100 
hours of use. If it isn’t cleaned periodically, it can become clogged 
with dust, preventing proper ventilation. This can cause overheating 
and damage the projector. To clean the air filter, follow these steps:
1. Turn off the projector and unplug the power cord from the 
electrical outlet.
2. Place the projector on its side with the handle at the top so that 
the filter is easily accessible.
Note: Placing the projector in this position keeps dust from 
getting inside the projector housing.
3. Lift up the tab securing the air filter cover and remove the cover. 
(The air filter is attached to the inside of the filter cover.)
12
air filter tab 
						

							5    Maintenance             134
4. Use a small vacuum cleaner designed for computers and other 
office equipment to clean the filter. If you don’t have one, use a 
dry, lint-free cloth. 
If dirt is hard to remove or if the filter is torn, replace the air 
filter. 
Note: An air filter comes with each replacement lamp. Contact 
your dealer or call EPSON Accessories at (800) 873-7766 in 
the U.S. to obtain a new one. Request part number ELPLP07. In 
Canada, call (800) 873-7766 for dealer referral.
5. Replace the air filter cover.
6. Plug the power cord back into the electrical outlet. 
Replacing the Lamp
The projector lamp typically lasts for about 2000 hours of use. It’s 
time to replace the lamp when:p
The projected image gets darker or starts to deteriorate.
p
The projector lamp light is red or is flashing orange and red 
alternately.
p
The message LAMP REPLACE
 appears on the screen when 
the projector lamp comes on.
To order a replacement lamp, contact your dealer or call EPSON 
Accessories at (800) 873-7766 in the U.S. and ask for part number 
ELPLP07, or visit our website at www.epsonsupplies.com (U.S 
sales only). In Canada, call (800) 873-7766 for dealer referral. 
						

							Replacing the Lamp
135
Warning: Let the lamp cool before replacing it. Also, don’t touch 
the glass portion of the lamp assembly; this can cause premature 
lamp failure.
1. Turn off the projector and unplug the power cord from the 
electrical outlet and the projector. Wait at least 20 minutes for 
the bulb to cool.
2. Place the projector on its side with the handle at the top so you 
can easily access the lamp cover.
Note: Placing the projector in this position keeps dust from 
getting inside the projector housing.
3. Use a screwdriver, coin, or similar object to loosen the retaining 
screw on the lamp cover. When the screw is loose, lift off the 
lamp cover. (You can’t remove this screw from the cover.
)
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1 
						

							5    Maintenance             136
4. Use a screwdriver, coin, or similar object to loosen the two 
screws holding the lamp assembly in position. (You can’t 
remove these screws either.) 
Caution: Don’t touch the glass portion of the lamp assembly; 
this can cause premature lamp failure.
5. Lift up the handle and pull out the lamp assembly.
6. Gently lower the new lamp into position and make sure it’s 
inserted securely. Tighten the screws on the new lamp 
assembly.
7. Replace the lamp cover and tighten the cover screw. (Make sure 
the lamp cover is securely fastened. The projector won’t run if 
the lamp cover is open.) 
2
1 
						

							Transporting the Projector
137
Transporting the Projector
The projector contains many delicate parts. If you need to transport 
it, please follow these packing guidelines to prevent damaging the 
projector: p
When shipping the projector for repairs, place plenty of 
cushioning around it.
p
When transporting it for business use, first put the projector in a 
hard-shell carrying case (such as the optional EPSON case), 
then pack it in a firm box, using cushioning around the case. 
p
When you are carrying the projector by hand, be sure to store it 
in a hard-shell or soft carrying case (such as the optional cases 
offered by EPSON).
Note: EPSON shall not be liable for any damages incurred during 
transportation.