Epson Powerlite 77c Multimedia Projector Users Guide

							Fine-tuning the Projector71
Disabling the Projector’s Buttons
You can use the Operation Lock function to disable all the projector’s 
buttons, or all except the P 
Power button. 
1. Press the 
Menu button.
2. Select the 
Settings menu and press Enter.
3. Use the up and down arrow buttons to select 
Operation Lock 
and press the 
Enter button.
4. Select 
Full Lock to disable all the buttons, or Operation Lock to 
disable all except the
 Power button. Then press Enter.
5. Select 
Yes and press Enter to confirm the setting.
6. Press the 
Menu button.
Installing Security Locks
You can install two different types of security locks on the projector:
■You can use the security slot on the side of the projector to install 
a Kensington Microsaver Security System. For details, see 
www.kensington.com.
■You can use a wire lock to secure the projector to a room fixture 
or heavy furnituure, as shown below:
note
To cancel Operation Lock, 
press the projector’s 
Enter 
button for 7 seconds. 
						

							72Fine-tuning the Projector
Restoring the Default Settings
The Reset menu lets you return most projector menu settings to their 
default values. It also lets you reset the lamp hours to their initial 
default value; see page 78 for instructions on resetting the lamp timer.
To reset most projector menu settings, select 
Reset All and press the 
Enter button to display the confirmation screen. Select Yes to reset all 
the default settings or 
No to cancel.
note
The Computer Input, Zoom 
(PowerLite S5 Series only), 
Lamp Hours, and Language 
settings do not return to their 
defaults when you select 
Reset All. To reset the 
computer input, use the 
Reset option on the Signal 
menu; see page 58 for details. 
To reset the Zoom setting, use 
the 
Reset option on the 
Settings menu; see page 61 
for details. To reset the 
Language settings, use the 
Reset option on the 
Extended menu; see page 63 
for details. 
						

							73
5
Maintenance and 
Transportation
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 and the air intake and 
exhaust vents. A clogged air filter or air vent can block ventilation 
needed to cool the projector and cause overheating. 
The only parts you should replace are the lamp and air filter. 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 and replacing the air filter
■Replacing the lamp
■Resetting the lamp timer
■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 and 
filter covers. 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. 
						

							74Maintenance and Transportation
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, lint-free 
cloth. 
■To remove stubborn dirt or stains, moisten a soft cloth with water 
and a mild detergent. Then wipe the case. 
■Do not use wax, alcohol, benzene, paint thinner, or other 
chemical detergents. These can damage the case.
caution
Do not use glass cleaner to 
clean the lens. 
						

							Maintenance and Transportation75
Cleaning and Replacing the Air Filter
Clean the air filter and air intake and exhaust vent on the bottom of 
the projector 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. 
When the filter and vent are clogged, the projector displays the 
message 
The projector is overheating. Make sure nothing is 
blocking the air vent, and clean or replace the air filter.
To clean the air filter and air vent, follow these steps:
1. Turn off the projector, allow it to cool down, and unplug the 
power cord.
2. Turn the projector upside-down and clean the filter and air intake 
vent on the base of the projector.
To clean the filter and air vent, Epson recommends using a small 
vacuum cleaner designed for computers and other office 
equipment. If you don’t have one, gently clean them using a very 
soft brush (such as an artist’s brush).
If the dirt is difficult to remove or if the filter is torn, replace it. 
Contact your dealer or call Epson at (800) 463-7766 to obtain a 
new one (part number V13H134A13). 
Air filter 
						

							76Maintenance and Transportation3. If you need to replace the filter, slide it out, as shown.
4. Align the new filter carefully as you slide it into place. It should 
click into place.
Replacing the Lamp 
The projection lamp typically lasts for about 3000 hours of use 
(in high brightness mode) or 4000 hours (in low brightness mode). It 
is time to replace the lamp when: 
■The projected image gets darker or starts to deteriorate.
■The   lamp light is flashing orange. 
■The message Replace the Lamp appears on the screen when the 
lamp comes on. To maintain projector brightness and image 
quality, replace the lamp as soon as possible.
Contact your dealer or call Epson at (800) 463-7766 for a 
replacement lamp. Request part number V13H010L41.
Follow these steps to replace the lamp:
1. Press the P 
Power button twice to turn off the projector. When 
you hear the projector beep twice, unplug the power cord.
note
Air filters contain 
polycarbonate, ABS resin, 
and polyurethane foam. 
Dispose of used air filters 
according to local 
regulations.
note
You can check to see how 
many hours the lamp has 
been used. See page 65.
Turn off this product when 
not in use to prolong the life 
of the projector. 
warning
Let the lamp cool before 
replacing it. If the lamp 
breaks, handle the shards 
carefully to avoid injury. 
						

							Maintenance and Transportation77
2. If the projector has been on, allow it to cool down for at least an 
hour (or until the lamp is cool). 
3. Use the screwdriver included with the replacement lamp to loosen 
the screw holding the lamp cover (the lamp cover is located on top 
of the projector).
4. Slide the cover out, then lift it off.
5. Use the screwdriver to loosen the two screws holding the lamp in 
place. (You can’t remove the screws.) 
6. Hold the lamp as shown and pull it straight out. 
Don’t remove 
these screws
note
 The lamp(s) in this 
product contain mercury. 
Please consult your state and 
local regulations regarding 
disposal or recycling. Do not 
put in the trash. 
						

							78Maintenance and Transportation7. Gently insert the new lamp along the guide rail. If it doesn’t fit 
easily, make sure it’s facing the correct way. Push the lamp down 
firmly where the label 
PUSH appears.
8. Once the lamp is fully inserted, tighten its screws.
9. Lower the lamp cover into place. (The opening should be almost 
covered, and the top of the cover should be flush with the top of 
the projector.) Then slide the cover closed and tighten the screw.
10. Reset the lamp timer as described in the next section.
Resetting the Lamp Timer
You must reset the lamp timer after replacing the lamp to clear the 
Replace the Lamp warning message. Follow these steps:
1. Connect the power cable and turn on the projector.
2. Press the 
Menu button on the remote control or projector and 
select the 
Reset menu. Then press Enter. You see the following:
caution
Do not touch the glass 
portion of the lamp assembly. 
Touching the glass could 
result in premature lamp 
failure.
note
Be sure to seat the lamp fully 
and secure the lamp cover. If 
the lamp is not properly 
installed or the cover is loose, 
the lamp will not turn on.
note
Do not reset the lamp timer if 
you have not replaced the 
lamp. If you do, the Lamp 
Hours will not accurately 
reflect the number of hours 
that the lamp has been used. 
						

							Maintenance and Transportation79
3. Select the Lamp-Hours Reset option and press Enter. You see a 
confirmation screen.
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 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 as freight or checked luggage, 
first put it in the supplied carrying case, then pack it in a firm box, 
using cushioning around the case.
■When you are hand-carrying the projector, be sure to use the 
supplied carrying case.
note
Epson shall not be liable for 
any damages incurred during 
transportation. 
						

							80Maintenance and Transportation