Epson Powerlite 74c Multimedia Projector Users Guide

Fine-tuning the Projector61
If the password is not correct, you see the message “Wrong password. 
Please try again.” If you enter an incorrect password three times in 
succession, you see the message “The projector’s operation will be 
locked. Request code xxxxx” and the projector switches to standby 
mode for approximately 5 minutes. Write down the request code. 
Then disconnect the projector’s power cord from the electrical outlet, 
reconnect it, and turn the projector back on. 
When you see the...

62Fine-tuning the Projector 

Maintaining and Transporting the Projector63
1
Maintaining and 
Transporting the Projector
Your projector needs little maintenance. All you need to do on a 
regular basis is keep the lens clean. Any dirt or smears on the lens may 
show up on your projected image. 
You also need to periodically clean the air filter on the bottom of the 
projector. A clogged air filter can block ventilation needed to cool the 
projector and cause overheating. 
The only parts you should replace are the lamp and air filter....

64Maintaining and Transporting the Projector
Cleaning the Lens
Clean the lens whenever you notice dirt or dust on the surface. 
■Use a canister of compressed air to remove dust. 
■To remove dirt or smears on the lens, use lens-cleaning paper. If 
necessary, moisten a soft cloth with lens cleaner and gently wipe 
the lens surface.
Cleaning the Projector Case 
Before you clean the case, first turn off the projector and unplug the 
power cord. 
■To remove dirt or dust, wipe the case with a soft, dry,...

Maintaining and Transporting the Projector65
Cleaning and Replacing the Air Filter 
Clean the air filter on the bottom of the projector after every 100 
hours of use. If it is not cleaned periodically, it can become clogged 
with dust, preventing proper ventilation. This can cause overheating 
and damage the projector. When the filter is clogged, the projector 
displays the message “The projector is overheated.”
To clean the air filter, follow these steps:
1. Turn off the projector, allow it to cool...

66Maintaining and Transporting the Projector 4. If you need to replace the filter, lift the tab on the filter cover and 
pull it upward to remove it.
5. Remove the filter.
6. Install the new filter as shown below.
7. Replace the filter cover by inserting the tabs and then pressing 
down the other end until it clicks into place. 

Maintaining and Transporting the Projector67
Replacing the Lamp 
The projection lamp typically lasts for about 2000 hours of use 
(in High brightness mode) or 3000 hours (in Low brightness mode). 
It is time to replace the lamp when: 
■The projected image gets darker or starts to deteriorate.
■The   warning light is flashing red at 0.5-second intervals. 
■The message Lamp Replace appears on the screen when the 
lamp comes on. To maintain projector brightness and image 
quality, replace the lamp as soon...

68Maintaining and Transporting the Projector 6. Use the screwdriver to loosen the two screws holding the lamp in 
place. The screws are deep inside the projector on the sides of the 
lamp. (You can’t remove the screws.) 
7. Hold the lamp by the top, as shown, and pull it straight out. 
8. Gently insert the new lamp as shown below.
9. Once the lamp is fully inserted, tighten its screws.
Don’t remove these screws
warning
This product includes a lamp 
component that contains 
mercury. Please consult your...

Maintaining and Transporting the Projector69
10. Position the lamp cover so the arrows on the lamp cover align 
with the arrows on the projector. Then slide in the cover until it 
clicks into place.
11. Reset the lamp timer as described below.
Resetting the Lamp Timer
You must reset the lamp timer after replacing the lamp to clear the 
Lamp Replace warning message. Follow these steps:
1. Connect the power cable and turn on the projector.
2. Press the 
Menu button on the remote control and select the Info...

70Maintaining and Transporting the Projector 3. Press 
Enter to select the Lamp-Hours Reset option. You see the 
following:
4. Select 
Yes and press Enter.
5. Press 
Esc to return to the main menu or the Menu button to exit 
the menu system. 
Transporting the Projector
The projector contains many glass and precision parts. If you need to 
transport it, please follow these packing guidelines to prevent damage 
to the projector: 
■When shipping the projector for repairs, use the original 
packaging...