Epson Projector Emp 7900 User Manual

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Maintenance
Pull out the air filters.
Insert a flat-tipped screwdriver into the hollow as 
shown in the illustration below, and then pull it 
straight upwards.
The projector has two air filters.
Fold out the handle before removing the air filter at the side.
Insert the two new air filters, and push them in until 
they click into place.
2
3
TIP
Dispose of used air filters properly in accordance with your local 
regulations.
Air filter frame: Polycarbonate, ABS plastic
Air filter: Polyurethane foam 
						

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Saving a Users LogoYou can record the image that is currently being projected as a users logo.
PROCEDURE
Project the image that you would like to use as a 
users logo, and then press the [Menu] button on 
either the remote control or the projectors control 
panel.Select the Users Logo menu, and then press the 
[Enter] button on the remote control or the [Auto/
Enter] button on the projectors control panel.
Select Yes in the sub-menu, and then press the 
[Enter] button on the remote control or the [Auto/
Enter] button on the projectors control panel.
TIP
When a users logo is recorded, the previous users logo will be 
erased.12
[    ]: Select
Execute
VideoAudioEffectUsers LogoAdvanced1AboutReset All
[    ]: Execute
[Menu]: Exit
[    ]: SelectSettingAdvanced2
TIP
 If the User’s Logo Protect function of Password Protect is set to 
ON, a message is displayed and the users logo can not be 
recorded. To record a users logo, set Password Protect to OFF 
first.  p.56
 If keystone correction or the E-Zoom function have been used, they 
will be cancelled when the Users Logo menu is selected.3
Accept the present image as users logo?
Users Logo
YES
NO
TIP
When you press the [Enter] button on the remote control or the [Auto/
Enter] button on the projectors control panel, the images will be 
projected at their original image signal resolution, so that when you 
are projecting images which have a resolution that is different from 
the number of pixels on the projectors panel, and when you are 
projecting video images, the display size will change. 
						

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Saving a Users Logo
The image to be recorded and a selection marquee 
box will be displayed, so move the marquee box to 
select the part of the image to use.
Tilt the [ ] button on the remote control or press the [ ], 
[ ], [ ] and [ ] buttons on the projectors control panel to 
select the part of the image to use as the users logo, and then 
press the [Enter] button on the remote control or the [Auto/
Enter] button on the projectors control panel.
Select Yes at the confirmation screen, and then 
press the [Enter] button on the remote control or the 
[Auto/Enter] button on the projectors control panel.Select the zoom rate in the Zoom rate setting screen, 
and then press the [Enter] button on the remote 
control or the [Auto/Enter] button on the projectors 
control panel.
4
[ESC]: Return[    ]: Set
[       ]: Move
[Menu]: Exit
TIP
Users logos can be saved at up to 480 
×
×× × 360 dots in size.
5
Select this image?
YESNO Users Logo
6
Set the zoom rate.Zoom rate:
100%
200%
300%
Users Logo 
						

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Saving a Users Logo
Select Yes at the confirmation screen, and then 
press the [Enter] button on the remote control or the 
[Auto/Enter] button on the projectors control panel.
The image will then be saved. Once the image has been saved, 
the message Completed. will be displayed.
7
Save image as users logo?If you save it, the previous users logo willbe overwritten.
YESNO Users Logo
TIP
 Saving the users logo may take a few moments (about 15 seconds). 
Do not use the projector or any other sources which are connected to 
the projector while the users logo is being saved. If this is not 
observed, it may result in errors in projector operation.
 Once a users logo has been saved, the logo setting cannot be 
returned to the factory default. 
						

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Optional Accessories and ConsumablesThe following optional accessories are available for purchase if required. This list of optional accessories is current as of September 2004. Details of accessories 
are subject to change without notice.
*1 The 40 Billboard Vision screen and the long throw zoom lens cannot be used together.
*2 A special method of installation is required in order to suspend the 
projector from the ceiling. Please contact your supplier if you would 
like to use this installation method.
Optional AccessoriesSoft carry case ELPKS28
Hard travel case ELPKS29
Use this case if you need to carry the projector by hand.40 Billboard Vision screen
*1
ELPHS01
60 Billboard Vision screen ELPHS03
A translucent-type screen. ( Aspect ratio
g4:3)
60 screen ELPSC07
80 screen ELPSC08
100 screen ELPSC10
A portable roll-type screens. (Aspect ratio 4:3)50 portable screen ELPSC06
A compact screen which can be carried easily. (Aspect ratio 4:3)VGA-HD15 PC cable ELPKC02
(1.8 m (6 ft.) - for mini D-Sub 15-pin/mini D-Sub 15-pin)This is the same computer cable as the projectors accessory computer cable.VGA-HD15 PC cable ELPKC09
(3 m (9.8 ft.) - for mini D-Sub 15-pin/mini D-Sub 15-pin)
VGA-HD15 PC cable ELPKC10
(20 m (65.6 ft.) - for mini D-Sub 15-pin/mini D-Sub 15-pin)
Use these extension cables if the accessory computer cable is too short.Digital video cable DVI-D/DVI-D ELPKC20
(3 m (9.8 ft.) - for DVI-D male/male)
This is a  DVI
g cable for connecting the projector to a computer with a 
digital RGB output interface.
Component video cable ELPKC19
(3 m (9.8 ft.) - for mini D-Sub 15-pin/RCA male × 3)
Component video cable ELPKC27
(0.35 m (1.15 ft.) - for mini D-Sub 15-pin/RCA female × 3)
Use to connect a  component video
g source.
Remote control cable set ELPKC28
(10 m - for 3.5 mm dia. mini plug (male-male))
(10 m - for 3.5 mm dia. mini jack (male-female))
Use in order to operate the projector accurately by remote control from a 
distance.Long throw zoom lens
*1
 ELPLL05
(Projection distance ratio: Approx. 2.33–3.15)
Medium throw zoom lens* 1
 ELPLM03
(Projection distance ratio: Approx. 1.75–2.36)
Wide Zoom Lens
* 1
 ELPLW03 (For EMP-7900NL)
(Projection distance ratio: Approx. 1.3–1.8)
Projection distance ratio = Projection distance/Width of projection area
The values should be used as a guide for setting up. The value will vary 
depending on setup conditions and the zoom setting.
Ceiling plate
* 2
 ELPFC03
Pipe 370 (370 mm (14.57 in.)/silver)
* 2
ELPFP04
Pipe 570 (570 mm (22.44 in.)/silver)
* 2
ELPFP05
Pipe 770 (770 mm (30.31 in.)/silver)
* 2
ELPFP06
Use when installing the projector on a high ceiling or a ceiling with 
veneer panels.
Ceiling mount ELPMB13
Use when installing the projector on a ceiling.Image presentation camera ELPDC04
Use to project books, OHP films and slides. 
						

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Optional Accessories and Consumables
ConsumablesSpare lamp ELPLP22
(Set with spare lamp and two spare air filters)
Use as a replacement for spent lamps.Filter kit (3 sets of 2 air filters (total 6)) ELPAF01
Use as a replacement for spent air filters. 
						

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GlossaryThe following table contains explanations of some of the terms used in this guide which may be unfamiliar or which are not explained in the text of the guide. 
Further information can be obtained by referring to other commercially-available publications.
3-2 pull-down function
This function directly converts image sources that have been recorded in the same 24-frame format used for movies into 60-
frame progressive signals. This allows data such as DVD software that has been recorded in 24-frame format to be played 
back on large screens with more natural and accurate reproduction, without any loss of image quality from the original movie.
5BNC
A port used to input analogue video signals.
Aspect ratio
The ratio between an images length and its height. HDTV images have an aspect ratio of 16:9 and appear elongated. The 
aspect ratio for standard images is 4:3.
Colour temperature
The temperature of an object which is emitting light. If the colour temperature is high, the colours tend to take on a bluish 
tinge. If the colour temperature is lower, the colours tend to take on a reddish tinge.
Component video
Video signals which have the video brightness signals and colour signals separated, in order to provide better image quality. In 
high-definition TV (HDTV), it refers to images which consist of three independent signals: Y (luminance signal), and Pb and 
Pr (colour difference signals).
Composite video
Video signals which have the video brightness signals and colour signals mixed together. The type of signals commonly used 
by household video equipment (NTSC, PAL and SECAM formats). 
The carrier signal Y (luminance signal) and chroma (colour) signal which are contained in the colour bar are overlapped to 
form a single signal.
Contrast
The relative brightness of the light and dark areas of an image can be increased or decreased in order to make text and 
graphics stand out more clearly, or to make them appear softer. Adjusting this particular property of an image is called 
contrast adjustment.
Cool-down
This is the process by which the projectors lamp is cooled down after it has become hot through use. It is carried out 
automatically when the [Power] button on either the remote control or the projectors control panel has been pressed to turn  
the projector off. Do not disconnect the power cord while cool-down is in progress, otherwise the cool-down process will not 
work properly. If the cool-down period is not allowed to finish normally, the projectors lamp and internal components will 
remain at high temperatures, and this may shorten the operating life of the lamp or cause problems with the operation of the 
projector.
DFP
Abbreviation for Digital Flat Panel. Refers to a standard method for digital transmission of video signals.
DHCP
Abbreviation for Dynamic Host Configuration protocol, which is a protocol for automatically assigning an IP address
g for 
devices that are connected to a network.
Dolby Digital
A sound format developed by Dolby Laboratories. Normal stereo is a 2-channel format which uses two speakers. Dolby 
Digital is a 6-channel (5.1-channel) system which adds to this a centre speaker two rear speakers and a sub-woofer.
DV I
(DVI-D)
Abbreviation for Digital Visual Interface. Refers to a standard method for digital transmission of video signals.
DVI is a standard which has also been applied to digital household electronic equipment other than computers. It allows 
images to be transmitted at higher resolutions than for DFP, and also includes a digital signal encoding function.
Film judgment function
A function for judging whether an image source is a 24 Hz progressive film source or not.
Gateway
A server (router) that is used for communication over a network (subnet) that is divided up using subnet masks. 
						

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Glossary
HDTV
An abbreviation for High-Definition Television. It refers to high-definition systems which satisfy the following conditions.
Vertical resolution of 750p or 1125i or greater (p = progressive
gscanning, i = interlaced
gscanning)
Screen aspect ratio
gof 16:9
Dolby Digital
gaudio reception and playback (or output)
Interlaced
A method of image scanning whereby the image data is divided into fine horizontal lines which are displayed in sequence 
starting from left to right and then from the top to the bottom of the screen. The even-numbered lines and odd-numbered lines 
are displayed alternately.
IP address
A series of numbers that identifies a device that is connected to a network.
MAC address
Abbreviation for Media Access Control address. A MAC address is a unique ID number that is assigned to each network 
adapter. All network adapters are assigned this unique address, and these are used as the basis for communication between 
each network adapter.
Progressive
A method of image scanning whereby the image data from a single image is scanned sequentially from top to bottom to create 
a single image.
Refresh rate
The light-emitting element of a display maintains the same luminosity and colour for an extremely short time. Because of this, 
the image must be scanned many times per second in order to refresh the light-emitting element. The number of refresh 
operations per second is called the refresh rate, and is expressed in hertz (Hz).
Resize display
This function is used to project computer images that have a resolution more than or less than the projectors panel resolution 
to be projected so that they fill the whole of the projection area.
SDTV
An abbreviation for Standard Definition Television. It refers to standard television systems which do not satisfy the conditions 
for High-Definition Television.
Security lock
A device consisting of a projector case with a hole in it that a commercially-available theft-prevention cable can be passed 
through in order to secure the device to a table or pillar. This projector is compatible with the Microsaver Security System 
manufactured by Kensington.
SNMP
Abbreviation for Simple Network Management Protocol. In TCP/IP networks, this protocol is used for communication 
between routers and other devices that are connected to the network such as computers and terminals so that these devices can 
be monitored and controlled over the network.
Squeeze mode
In this mode, wide-screen images in 16:9 mode are compressed in the horizontal direction so that they are stored on the 
recording medium as 4:3 images.
When these images are played back by the projector in squeeze mode, they are restored to their original 16:9 format.
sRGB
An international standard for colour intervals that was formulated so that colours which are reproduced by video equipment 
can be handled easily by computer operating systems (OS) and the Internet.
Subnet mask
A series of numbers that define the number of bits to be used for network addresses in a network (subnet) that is divided up 
according to IP addresses.
SVGA
A type of video signal with a resolution of 800 (horizontal) × 600 (vertical) dots which is used by IBM PC/AT-compatible 
computers. 
						

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Glossary
S-Video
A video signal which has the luminance component and colour component separated in order to provide better image quality.
It refers to images which consist of two independent signals: Y (luminance signal), and C (colour signal).
SXGA
A type of video signal with a resolution of 1280 (horizontal) × 1024 (vertical) dots which is used by IBM PC/AT-compatible 
computers.
Sync (Synchronisation)
The signals output from computers have a specific frequency. If the projector frequency does not match this frequency, the 
resulting images will not be of a good quality. The process of matching the phases of these signals (the relative position of the 
crests and troughs in the signal) is called synchronisation. If the signals are not synchronized, problems such as flickering, 
blurriness and horizontal interference can occur.
Tr a c k i n g
The signals output from computers have a specific frequency. If the projector frequency does not match this frequency, the 
resulting images will not be of a good quality. The process of matching the frequency of these signals (the number of crests in 
the signal) is called tracking. If tracking is not carried out correctly, wide vertical stripes will appear in the projected images.
Trap IP address
An IP address
g for the destination computer when SNMP reports that a problem has occurred.
USB
An abbreviation for Universal Serial Bus. USB is an interface for connecting personal computers to peripheral devices which 
only support relatively low data transmission speeds.
UXGA
A type of video signal with a resolution of 1600 (horizontal) × 1200 (vertical) dots which is used by IBM PC/AT-compatible 
computers.
VGA
A type of video signal with a resolution of 640 (horizontal) × 480 (vertical) dots which is used by IBM PC/AT-compatible 
computers.
XGA
A type of video signal with a resolution of 1024 (horizontal) × 768 (vertical) dots which is used by IBM PC/AT-compatible 
computers. 
						

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List of ESC/VP21 CommandsCommand List
When a power on command is sent to the projector, the power will turn on 
and the projector will change to warm-up mode. When the power has 
turned on, a colon : (3Ah) will be returned.
When the projector executes a command, it returns a : and waits for the 
next command to be sent.
If command processing terminates with an error, the projector outputs an 
error message and then returns the : code.
* When issuing any of the above commands, tack a Carriage Return (CR) 
code (0Dh) on to the end.
Communication Protocol
Item
Command
Power ON/OFF
ON
PWR ON
OFF
PWR OFF
Signal selection
Computer
SOURCE 10
DVI
g
SOURCE 30
Video
SOURCE 41
S-Video
SOURCE 42
BNC
SOURCE B0
A/V Mute ON/OFF
ON
MUTE ON
OFF
MUTE OFF
A/V Mute Selection
Black
MSEL 00
Blue
MSEL 01
Users Logo
MSEL 02
•
•• •Standard baud rate : 9600 bps•
•• •Data length : 8 bits•
•• •Parity : None•
•• •Stop bit : 1 bit•
•• •Flow control : None•
•• •Connector shape : D-Sub 9-pin (male)•
•• •Projector input port : Control (RS-232C)