Epson Projector Emp 7850 User Manual

							130 EMP-7850 User’s Guide
GlossaryFollowing is an explanation of some of the terms used in this guide which may be unfamiliar or which were not explained in the text of this guide itself. 
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.
Channel
Communication speeds will drop if there are too many devices performing wireless communication using the same frequency. In this case, it is 
possible to avoid interference from other wireless LANs by setting a wireless channel for each wireless LAN network. 
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 signals consist of the carrier signal Y (luminance signal) and the chroma (colour) signal which are contained in the colour bar 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
Use this procedure to cool a projector lamp that is hot from use. Cool- down happens automatically when the [Power] button is pressed on the 
projector or on the remote control to turn the projector off. Do not unplug the projector power cable whilst it is cooling down. If the lamp does not cool 
down properly, heat from the lamp is trapped inside the projector, potentially shortening the life of the lamp and causing projector failure. 
DFP
Abbreviation for Digital Flat Panel. Refers to a standard method for digital transmission of video signals.
DHCP
Abbreviation of Dynamic Host Configuration Protocol. This protocol automatically assigns an IP address to a computer 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.
DPOF
Abbreviation of Digital Print Order Format, which is a format used to record infomation concerning the printing of photographs taken with a digital 
camera (which images to print, how many copies, etc.) to recordable media, such as a memory card.
DV I
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. 
						

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Glossary GlossaryEMP-7850 User’s Guide
EMP Link21L
A utility software program that allows the projector to be connected to a computer so that the computer can be used to control the projector. For details 
on acquiring the software and for instructions on using the software and compatible projector models, please visit the web site 
http://www.epson.co.uk/support/download/projector.htm.
ESSID
ESS is an abbreviation of Extended Service Set. The ESSID is an identification number for connecting with a counterpart on a wireless LAN. Wireless 
communication is possible between devices with corresponding ESSID numbers.
Film judgment 
function
A function for judging whether an image source is a 24 Hz progressive film source or not.
Gateway
A server (router) for communicating across a network divided according to subnet masks.
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 scanning
g, i = interlaced scanning
g)
Screen aspect ratio
g of 16:9
Dolby Digital
g audio 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
MAC is an abbreviation of Media Access Control. The MAC address is an ID number unique to each network card. A unique number is assigned to 
each network card. Data is transmitted between cards (devices) based on this identification. 
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).
Resized 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
An abbreviation for Simple Network Management Protocol, which is the protocol for monitoring and controlling devices such as routers and 
computers connected to a TCP/IP network.
Squeeze mode
To reduce the width of a 16:9 wide-screen video image, record the video image as 4:3 in the video software. Setting the aspect ratio to 16:9 on the 
projector will restore the video image to 16:9 wide-screen 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
This is a number which defines, from the IP address, the number of bits used in network addresses of assigned networks (subnets).
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 GlossaryEMP-7850 User’s Guide
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.
(Synchronization)
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.
Tracking
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
This is the IP address of the messaged computer used for error notification in SNMP.
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.
VG A
A type of video signal with a resolution of 640 (horizontal) × 480 (vertical) dots which is used by IBM PC/AT-compatible computers.
WEP
This is an abbreviation of Wired Equivalent Privacy. This is a security method which encrypts data during transmission. 
Data communication cannot be performed unless the sending and receiving machines are registered with the same encryption key by the WEP. 
XGA
A type of video signal with a resolution of 1024 (horizontal) × 768 (vertical) dots which is used by IBM PC/AT-compatible computers.
YCbCr
The carrier signal which is contained in the colour bar signal used in modern TV transmissions. The name comes from the Y (luminance) signal and 
the CbCr (chroma (colour)) signals.
YPbPr
The carrier signal which is contained in the colour bar signal used in high-definition TV (HDTV) transmissions. The name comes from the Y 
(luminance) signal and the PbPr (colour difference) signals. 
						

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List of ESC/VP21 CommandsCommand List
When a power ON command is sent to the projector, the power for the 
projector turns on. When the projector is in a command ready state, it 
returns the 3Ah (:) code.
Furthermore, when command processing is complete, the projector also 
returns a : code.
The : code status can be used to determine whether the projector is ready 
or busy. If command processing terminates with an error, an error message 
is output and then the : code is sent.
Communication Protocol
Item
Command
Power ON/OFF
ON
PWR ON
OFF
PWR OFF
Signal selection
Computer
SOURCE 10
DVI
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) 
						

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List of ESC/VP21 Commands List of ESC/VP21 CommandsEMP-7850 User’s Guide
Cable Layouts
* The [USB TypeA] port does not have a USB hub function.
Serial connection•Connector shape : D-Sub 9-pin (male)•Projector input 
connector: Control (RS-232C)

 (PC serial cable) 
Signal Function
GND
5
5
GND
GND Signal wire earth
RD
2
3
TD
TD Transmit data
TD
3
2
RD
RD Receive data
DTR
4
6
DSR
DSR Data set ready
DSR
6
4
DTR
DTR Data terminal ready

USB connection•Connector shape : USB(type B)


(Type B)
USB 
						

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List of ESC/VP21 Commands List of ESC/VP21 CommandsEMP-7850 User’s Guide
USB Connection Setup
In order to control the projector using ESC/VP21 commands via a USB 
connection, the following preparations must be carried out.PROCEDURE
Download the EMP Link21L
 utility software from the 
EPSON website to the computer being used.
For details on acquiring the software, please visit the Web site 
http://www.epson.co.uk/support/download/projector.htm
.
The USB driver (USB-COM Driver) will be downloaded 
together with the utility software, so Install this USB 
driver on the computer that is to be used.
Read the instructions displayed on the download screen.Change the COM Port setting in the Advanced2 
menu to USB.Turn the projector off.After the cool-down
 period has finished, turn the 
projectors power back on.
Once the projectors power has turned back on, communication 
via a USB connection will then be possible.
12345
CAUTION
If the power cable is disconnected before cool-down has finished, the 
communication port will not be changed. 
						

							136 EMP-7850 User’s Guide
List of Supported Monitor Displays
*1 Connection is not possible if the equipment does not have a VGA 
output port.
*2 The resolution for real display is the virtual (window) display 
resolution.
It may be possible to project signals which are not listed in the above table. 
However, not all functions may be supportable with such signals.Computer/RGB Video
Signal
Refresh rate
 
(Hz)Resolution (dots)
Resolutions for 
resized display
 
(dots)
VGAEGA
640×350
1024×560
VGA
60/72/75/85/100/
120, iMac
*1
640×480
1024×768
SVGA
56/60/72/75/85/
100/120, iMac
*1
800×600
1024×768
XGA
60/70/75/85/100/
120, iMac
*1
1024×768
1024×768
SXGA
70/75/85/100
1152×864
*2
1024×768
SXGA
60/75/85
1280×960
*2
1024×768
1280×1024
*2
960×768
SXGA+
60/75/85
1400×1050
*2
1024×768
UXGA
60/65/70/75/80/85
1600×1200
*2
1024×768
MAC13
640×480
1024×768
MAC16
832×624
1024×768
MAC19
1024×768
1024×768
MAC21
1152×870
*2
1016×768
SDTV
 
(525i, 525p, 
625i, 625p)
1024×768
(4:3 aspect ratio
)
1024×576
(16:9 aspect ratio)
HDTV
 (750p)
1024×576
HDTV 
(1125i, 1125p)
1024×576
Component Video
Signal
Display mode (dots)
4:3 aspect ratio
 
display
16:9 aspect ratio 
display
SDTV
(525i, 525p, 625i, 625p)
1024×768
1024×576
HDTV
(750p) 16:9
–
1024×576
HDTV(1125i) 16:9
–
1024×576
Composite Video/S-Video
Signal
Display mode (dots)
4:3 aspect ratio
 
display
16:9 aspect ratio 
display
TV(NTSC)
1024×768
1024×576
TV (PAL,SECAM)
1024×768
1024×576 
						

							137 EMP-7850 User’s Guide
Specifications
*1 These values are for when the standard lens is fitted. Refer to the 
documentation supplied with optional lenses for details on those lenses.
*2 The USB connector is not guaranteed to operate correctly with all USB-
compatible devices.
Product name
Multimedia Projector EMP-7850
Dimensions
419 (W) × 117 (H) × 325 (D) mm 
(16.5 (W) × 4.6 (H) × 12.8 (D) in.) 
(not including feet)
Panel size
1.0 inches
Display method
Polysilicon TFT
Resolution
XGA
 786,432 pixels (1024 (W) 
× 768 (H) dots) 
× 3
Focus 
adjustment
*1
Manual
Zoom 
adjustment
*1
Manual (approx. 1:1.35)
Lamp 
(light source)
UHE lamp, Rated 250 W, Model No.: ELPLP22
Max. audio 
output
5 W monaural
Speaker
1
Power supply
100–240 VAC 3.6–1.6 A 50/60 Hz
Operating 
temperature
+5º– +35ºC (41º–95ºF ) (No condensation)
Storage 
temperature
-10º– +60ºC (14º–140ºF ) (No condensation)
Weight
Approx. 5.8 kg ( 12.1 lbs)
Connectors
DVI:
Computer:
Audio input:
1
1
1
DVI-D
Mini D-Sub 15-pin (female) Blue
Stereo mini jack
USB
*2
:
2
USB connector (type A,B)
BNC:
Audio input:
1
1
5BNC (female)
RCA pin jack × 2 (L, R)
S-Video:
Audio input:
1
1
Mini DIN 4-pin
RCA pin jack × 2 (L, R)
Video:
Audio input:
1
1
RCA pin jack
RCA pin jack × 2 (L, R)
Control 
(RS-232C):
1
D-Sub 9-pin (male)
Remote:
1
Stereo mini jack
Monitor Out:
1
Mini D-sub 15-pin (female) Black
Audio Out:
1
Stereo mini jack
Card Slot
PCMCIA:
1
TypeII slot 
						

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Specifications SpecificationsEMP-7850 User’s Guide
Safety
USA
UL1950 3
rd Edition
Canada
CSA C22.2 No.950-95 (cUL)
European Community
The Low Voltage Directive (73/23/EEC)
IEC60950 2nd Edition, +Amd.1, +Amd.2, +Amd.3, +Amd.4
EMC
USA
FCC 47CFR Part15B Class B (DoC)
Canada
ICES-003 Class B
European Community
The EMC Directive (89/336/EEC)
EN55022, 1998 Class B
EN55024, 1998
IEC61000-4-2, IEC61000-4-3, IEC61000-4-4, IEC61000-4-5,
IEC61000-4-6, IEC61000-4-8, IEC61000-4-11,
IEC61000-3-2, IEC61000-3-3
Australia/New Zealand
AS/NZS 3548:1995, A1:1997, A2:1997 Class B
CISPR Pub.22:1993, A1:1995, A2:1996, Class B 
						

							139 EMP-7850 User’s Guide
Appearance
Units: mm 4-M4 × 10 Centre of lens
63.5*
10180
129
*Distance from centre of lens to suspension bracket fixing point422 117
325
6510
138
151 322
80