Epson Powerlite 7900p Multimedia Projector Users Guide

							101
1
Maintaining the Projector
Your projector needs little maintenance. All you have 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 filters at the side and base of 
the projector. A clogged air filter can block ventilation needed to cool 
the projector.
The only parts you should replace are the lamp and air filters (when 
you order a new lamp, replacement filters come with it). If any other 
part needs replacing, contact your dealer or a qualified servicer.
This chapter covers the following:
■Cleaning the lens
■Cleaning the projector case
■Cleaning the air filters and vents
■Replacing the lamp and air filters
■Transporting the projector
warning
Before you clean any part of 
the projector, turn it off and 
unplug the power cord. 
Never open any cover on the 
projector, except the lamp 
cover. Dangerous electrical 
voltages in the projector can 
injure you severely. Do not 
try to service this product 
yourself, except as specifically 
explained in this User’s 
Guide. Refer all other 
servicing to qualified service 
personnel. 
						

							102Maintaining 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 tissue. 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, lint-free 
cloth.
■To remove stubborn dirt or stains, moisten a soft cloth with water 
and a neutral detergent. Then wipe the case.
■Do not use wax, alcohol, benzene, thinner, or other chemical 
detergents. These can damage the case.
Remove the cap
before cleaning 
						

							Maintaining the Projector103
Cleaning the Air Filters and Vents
Clean the air filters and air vents after every 100 hours of use. If they 
are not cleaned periodically, they can become clogged with dust, 
preventing proper ventilation. This can cause overheating and damage 
the projector. 
Follow these steps:
1. Turn off the projector and unplug the power cord.
2. To clean the intake vents, Epson recommends using a small 
vacuum cleaner designed for computers and other office 
equipment. If you don’t have one, gently clean the vents with a 
soft brush (such as an artist’s paintbrush).
3. Gently turn the projector over and remove the filters from the 
side and bottom of the projector. Then use a small vacuum 
cleaner or soft brush to clean the filters. Slide the filters back into 
place when you’re done. 
						

							104Maintaining the Projector4. If the dirt is difficult to remove or a filter is broken, replace the 
filters as in the following section. Contact your dealer or call 
Epson at (800) 873-7766 in the United States to obtain new ones. 
In Canada, please call (800) 463-7766 for dealer referral.
Replacing the Lamp and Air Filters
The projection lamp typically lasts from 2000 to 3000 hours, 
depending on the Brightness Control setting used (see page 68). 
Selecting the low brightness setting maximizes the lamp’s life.
It is time to replace the lamp when: 
■The projected image gets darker or starts to deteriorate.
■The message LAMP REPLACE appears on the screen when the 
lamp comes on and the lamp warning light   flashes orange. To 
maintain projector brightness and image quality, replace the lamp 
as soon as possible. 
■The lamp warning light   flashes red (the lamp is burnt out).
Contact your dealer or call Epson at (800) 873-7766 in the United 
States for a replacement lamp. Request part number V13H010L22. In 
Canada, please call (800) 463-7766 for dealer referral.
Follow these steps to replace the lamp and air filters:
1. Turn off the projector.
2. When the power light stops flashing, unplug the power cord.
3. Let the projector cool for at least an hour (if it has been on). The 
lamp is extremely hot immediately after use. 
note
When you get a replacement 
lamp for your projector, new 
air filters are included. You 
should replace the filters 
when you replace the lamp.
Turn the projector off when 
not in use. Continuous 
24-hour-a-day use may 
reduce the overall life of this 
product.
You can check how long the 
lamp has been in use (see 
page 107).
warning
Let the lamp cool fully 
before replacing it. 
In the unlikely event that 
the lamp has broken, small 
glass fragments may be 
present and should be 
removed carefully to avoid 
injury. 
						

							Maintaining the Projector105
4. Turn the projector over and remove the air filters at the side and 
bottom of the projector.
5. Insert the two new air filters. They should click into place.
6. Insert the screwdriver supplied with the spare lamp, or some other 
flat-tipped screwdriver, into the space beside the air vent. Gently 
slide the lamp cover until the arrow on the cover is aligned with 
the arrow on the projector. Then lift the cover off.
Slide the filter up 
here . . .
. . . and here
1
Insert the screwdriver here 
						

							106Maintaining the Projector7. Loosen the two screws holding the lamp in place (you don’t need 
to remove them). 
8. Grasp the wire handle as shown and pull the lamp straight out.
9. Gently insert the new lamp. 
10. Once the lamp is fully inserted, tighten its screws and replace the 
cover. (The projector won’t come on if the lamp cover is loose.) 
11. Reset the lamp timer as described in the next section. 
warning
This product includes a 
lamp component that 
contains mercury (Hg). 
Please consult you local and 
state regulations regarding 
disposal and recycling. Do 
not put it in the trash.
note
When you get a replacement 
lamp for your projector, new 
air filters are included. This 
is a good time to install them 
(see page 104). 
						

							Maintaining the Projector107
Resetting the Lamp Timer
After you replace the lamp, you need to reset the lamp timer using the 
projector’s menu. 
1. Plug the projector in and turn it on.
2. Press the 
Menu button on the remote control (or on the 
projector’s control panel). You see the main menu.
3. Use the  pointer button on the remote control (or the arrow 
buttons on the projector) to highlight 
About, then press Enter. 
You see this screen: 
4. Select 
Reset Lamp Timer, then press Enter. You see this 
prompt:
5. Select
 Yes, then press Enter.
6. When you’re finished, press 
ESC or Menu to exit. 
note
The lamp usage timer shows 
0H until you’ve used the 
lamp for at least 10 hours.
Video
Audio
Setting
Users Logo
Advanced1
About
Reset All
Frequency Source
V ---.---Hz Reset Lamp Timer
H ---.---kHz Lamp (High Brightness)0H
SYNC Mode SYNC Polarity
------V ------ H ------
Resolution
Refresh Rate---.-- Hz ----x    ---- Computer
Input Signal
: ::
          (Low Brightness)0H :
: :
:
:
: :AutoExecute
[    ]: Select[    ]: Enter[Menu]: Exit
Effect
Advanced2:
Lamp usage
Reset Lamp Timer
Execute?
YESNO
Reset Lamp Timer
Execute?
YESNO 
						

							108Maintaining the Projector
Transporting the Projector
The projector contains many glass and precision parts. Follow these 
guidelines to prevent injury or damage:
■When hand-carrying the projector, you should use the handle to 
lift it only a short distance (for example, to set it on a table). 
■When shipping the projector for repairs, use the original 
packaging material if possible. If you do not have the original 
packaging, use equivalent materials, placing plenty of cushioning 
around the projector.
■When transporting the projector a long distance, first place it in a 
hard-shell shipping case, and then pack it in a firm box, placing 
cushioning around the case. (An optional ATA molded hard shell 
case is available from Epson; see page 15.)note
Epson shall not be liable for 
any damages incurred 
during transportation. 
						

							109
1
Solving Problems
This chapter helps you solve problems with your projector, and tells 
you how to contact technical support for problems you can’t solve 
yourself. This chapter explains the following:
■Using the projector’s on-screen help system
■What to do when the projector’s status lights flash
■Solving problems with the image or sound
■Solving problems with Easy Management
■Solving problems with the remote control
■Contacting technical support 
						

							110Solving Problems
Using On-Screen Help
If the image doesn’t look right or your audio isn’t working, you can 
get help by pressing the blue 
? Help button on top of the projector or 
on the remote control. The following choices are available:
■Problems with image
■Problems with sound
■Language change
Follow these steps to get help:
1. Press the blue 
? Help button on the projector. 
You see the Help menu:
2. Use the  pointer button on the remote control or the arrow 
buttons on the projector to highlight menu items.
3. After highlighting a menu item, press the 
Enter button on the 
remote control or on the projector to select it. 
4. To exit the Help system, press the 
? Help button.
If none of the suggestions solves your problem, see additional 
solutions to problems in the following sections.
Help button on 
projector
No image appears on the screen.
The image is not displayed fully on the screen.
(cut off/ too big/ too small/ partial)
The image colors dont look right.
The image is too dark.
The image is distorted. The image is unsteady.
Help Menu
[    ]: Enter[ESC]: Return  [    ]: Select[    ]: Exit