Epson Projector Emp 720 User Manual

							69
Images appear dark
Are the image signal format settings correct?
If the Input Signal command in the Video menu is set 
to YPbPr or YCbCr when a computer is connected, the 
projected images will appear purplish.
If a computer, component video
  or RGB-Video source is 
connected to the projector, use the Input Signal command 
in the Video menu to select the signal format which 
matches the signal connected source. (p.49, 50)
If a composite video
 or S-Video source is connected to 
the projector, use the Video Signal command in the 
Video menu to select the video signal format. (p.51)
Has the image contrast
 been adjusted correctly?
Video - Contrast (p.49, 50)
Has the color been adjusted correctly?
Advanced - Color Adjustment (p.54)
Have the color intensity and tint been adjusted 
correctly?
(The colors may not exactly match the colors in the image 
on the computer screen or LCD screen, but this is normal 
and is not the sign of a problem.)
Video - Color, Tint (p.50)
Is the lamp due for replacement?
When the lamp is nearly due for replacement, the image 
will become darker and the color quality will become 
poorer. When this happens, the lamp should be replaced 
with a new one. (p.78)
Is the lamp due for replacement?
When the lamp is nearly due for replacement, the image 
will become darker and the color quality will become 
poorer. When this happens, the lamp should be replaced 
with a new one. (p.78)
Has the image brightness been adjusted correctly?
Video - Brightness (p.49, 50)
Has the image contrast
 been adjusted correctly?
Video - Contrast (p.49, 50) 
						

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Images appear greenish.
No sound can be heard.
The remote control does not work
Do the settings for component video input signals 
match the signals from the connected device?
If the Input Signal command in the Video menu is set 
to RGB when a component video signal source is 
connected to the projector, the images will appear greenish. 
Select the correct signal format for the connected source. 
Video - Input Signal (p.50)
Is the audio source connected correctly?
(p.20, 26)
Has the volume been adjusted to the minimum 
setting?
(p.51)
Is the A/V Mute
 setting turned on?
The projector may be in A/V Mute mode. Press the [A/V 
Mute] button on the remote control to cancel the A/V Mute.
(p.44)
Is the remote control being pointed in the right 
direction?
The operating angle for the remote control is 
approximately 30º horizontally and approximately 15º 
vertically.
Is the remote control too far from the projector?
The operating distance for the remote control is 
approximately 6 m (20 ft.). (p.13)
Is direct sunlight or strong light from fluorescent 
lamps shining onto the remote control light-receiving 
area?
Has the battery insulating tape been removed?
(p.12)
Is there battery in the remote control?
(p.76)
Is the battery dead?
Has the battery been inserted correctly?
(p.76)
MenuA/V Mute
E-ZoomFreeze
Page up Page downPower
ESC AutoEnter
S-Video/VideoColor Mode Computer
When the Indicators Provide No Help 
						

							71
The power does not turn off (after the [Power] button is pressed)
The Power indicator remains orange.
This projector is designed so that the Power indicator 
remains lit even when after the power has been turned off. 
The Power indicator will switch off when the power cord is 
disconnected from the electrical outlet.
The cooling fan does not stop.
After the [Power] button is pressed to turn off the power, 
the cool-down
 period starts. (During this time, the lamp 
is cooling down and the Power indicator flashes orange).
After this, the Power indicator changes to a steady orange, 
and you can then disconnect the power cord from the 
electrical outlet.
* The cool-down period lasts about 30 - 45 seconds. The 
actual time will vary depending on the external air 
temperature. 
						

							73
Appendices
This chapter provides information on maintenance procedures to 
ensure the best level of performance for the projector for a long time.
Maintenance.......................................................................74
 Cleaning ................................................................................................ 74Cleaning the Projector Case .............................................................................. 74
Cleaning the Lens ............................................................................................. 74
Cleaning the Air Filter ...................................................................................... 75
 Replacing Consumables ...................................................................... 76Battery Replacement Period ............................................................................. 76
Inserting the Battery.......................................................................................... 76
Lamp Replacement Period ................................................................................ 77
Replacing the Lamp .......................................................................................... 78
Resetting the Lamp Operating Time ................................................................. 80
Replacing the Air Filter .................................................................................... 81
Saving a Users Logo ........................................................82
Optional Accessories ........................................................84
Glossary .............................................................................85
List of ESC/VP21 Commands ...........................................88
 Command List ...................................................................................... 88
 USB Connection Setup ........................................................................ 89
List of Supported Monitor Displays .................................90
Specifications ....................................................................91
Appearance ........................................................................93
Index ...................................................................................94 
						

							74
Maintenance
This section describes maintenance tasks such as cleaning the projector and 
replacing consumable parts.
Cleaning
You should clean the projector if it becomes dirty or if the quality of projected 
images starts to deteriorate.
Caution :
Be sure to read the separate Safety Instructions/ World-Wide Warranty Terms for details 
on safe handling of the projector during cleaning.
Clean the projector case by wiping it gently with a soft cloth.
If the projector is particularly dirty, moisten the cloth with water containing a 
small amount of neutral detergent, and then firmly wring the cloth dry before 
using it to wipe the projector case. Then wipe the case again with a soft, dry 
cloth.
Caution :
Do not use volatile substances such as wax, alcohol or thinner to clean the projector 
case. These can cause the case to warp and make the coating finish peel off.
Use a commercially-available air blower, or use a lens cleaning paper to gently
wipe the lens.
Caution :
Do not rub the lens with harsh materials or subject the lens to shocks, as it can easily 
become damaged.
Cleaning the Projector Case
Cleaning the Lens 
						

							75
If the air filter becomes clogged with dust, it can cause overheating and damage 
the projector.
While keeping the projector horizontal, use a vacuum cleaner to clean away the 
dust from the air filter.
Tip :
 If the air filter is difficult to clean or if it is broken, it should be replaced. Contact your 
dealer for a spare air filter.
 Replacement lamps are provided with a spare air filter. The air filter should also be 
replaced when the lamp is replaced.
Cleaning the Air Filter 
						

							76
Replacing Consumables
This section describes how to replace the remote control battery, the lamp and 
the air filter.
If the remote control becomes slow in responding or if it stops working, the 
battery may be dead. If this happens, replace the battery with a new one.
* The replacement period given above may vary depending on the amount of 
usage and the ambient conditions.
Use the following type of battery as a replacement.
    1 CR2025 lithium battery
Replace the remote control battery with a new one by following the procedure 
given below.
Caution :
Be sure to read the Safety Instructions/ World-Wide Warranty Terms for information on 
safe handling of the battery.
Procedure
1Remove the battery holder.
While pushing the catch of the battery 
holder inward, pull the battery holder out.
2Remove the old battery and insert 
the new battery.
Check the position of the (+) mark inside 
the battery holder to ensure that that 
battery is inserted the correct way.
3Insert the battery holder into the 
remote control.
Push the battery holder in until it clicks.
Tip :
Dispose of used batteries in accordance with local 
waste disposal regulations.
Battery Replacement Period
Guide to battery replacement period: After about 3 months if the remote control 
is used for one hour each day
Inserting the Battery
Catch
Old batteryNew 
battery
 mark
Maintenance 
						

							77
It is time to replace the lamp when:
The message Lamp Replace. appears on the screen for 30 seconds 
when projection starts
.
When the   indicator is flashing red at 0.5-second intervals
The projected image gets darker or starts to deteriorate.
Tip :
 The replacement warning message is set to appear after about 1400 hours of lamp use 
in order to maintain the brightness and quality of the projected images. If you continue 
to use the lamp after this period, the possibility of the lamp breaking becomes greater. 
When the lamp replacement message appears, replace the lamp with a new one as soon 
as possible, even if it is still working.
 The warning message appears after about 1400 hours of use, but the actual life of each 
individual lamp will vary depending on the characteristics of the lamp and on the way 
it has been used. Some lamps may stop operating before 1400 hours of use, so you 
should always have a spare lamp ready in case.
 Contact your dealer for a spare lamp.
Lamp Replacement Period
A message will be displayed.
Flashes red at 0.5-second 
intervals 
						

							78
Caution :
 If the lamp stops working and needs to be replaced, there is the danger that the lamp 
may break when handled.
If replacing the lamp of a projector that has been installed to the ceiling, you should 
always assume that the lamp is broken and remove the lamp cover very carefully.
 Wait until the lamp has cooled down sufficiently before opening the lamp cover. It takes 
a further one hour after the cool-down
 period has finished for the lamp to be cool 
enough.
Procedure
1Turn off the projector power, wait 
for the cool-down period to end, 
and then disconnect the power 
cord.
The cool-down period lasts for 30 - 45 
seconds. The actual time will vary 
depending on the external air temperature.
2Wait until the lamp has cooled 
down, and then remove the lamp 
cover from the base of the 
projector.
It takes approximately one hour for the 
lamp to cool down by itself after the cool-
down period has finished.
While pressing the two hooks, pull the 
lamp cover up to remove it.
3Loosen the two lamp fixing screws.
Use the screwdriver that is supplied with 
the replacement lamp or a Phillips 
screwdriver to loosen the two lamp fixing 
screws that are securing the lamp to the 
projector.
Replacing the Lamp
Maintenance