Mitsubishi Ex321u St Projector User Manual

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Positioning your projector
Choosing a location
Your room layout or personal preference will dictate which installation location you select. Take into consideration 
the size and position of your screen, the location of a suitable power outlet, as well as the location and distance 
between the projector and the rest of your equipment.
Your projector is designed to be installed in one of the possible installation locations: 
For ceiling mounting, you need the ceiling mount kit designed for this projector. Ask a specialist for installation.For 
details, consult your dealer.
 The warranty on this projector does not cover any damage caused by use of any non-recommended ceiling mount 
kit or installation of the ceiling mount kit in an improper location.
 When the projector is mounted on the ceiling, images may appear darker than those projected in the case of 
tabletop mounting. This isn’t a product malfunction.
 Be sure to use this projector at an altitude of less than 1500 meters.
 Installation must be done by a qualified professional.
When the projector is installed on the ceiling using the ceiling mount kit, it is recommended to hold the mount kit and the 
projector using metal bars or wires in addition to the mount kit fixing screws to prevent the projector from falling due to 
an earthquake or other cause. For that purpose, use metal bars, wires, or screws that bear a load of at least 70 kgf. When 
using metal wires, secure one end to a screw hole marked with an arrow on the rear terminal panel and the other end to 
the mount kit. (Do not use screw holes without arrow marks.) In this case, make sure that the screws are inserted in the 
projector at least 5 mm. The length of the screws should be 20 mm or shorter. Also make sure that no electrical current is 
flowing in the mount kit due to current leakage or other cause. 
1. Front Table
Select this location with the projector placed near the 
floor in front of the screen. This is the most common way 
to position the projector for quick setup and portability.
2. Rear Table
Select this location with the projector placed near the 
floor behind the screen.
Note that a special rear projection screen is required.
SetRear Table in the SYSTEM SETUP: Basic > 
Projector Position menu after you turn the projector on.
3. Rear Ceiling
Select this location with the projector suspended upside-
down from the ceiling behind the screen.
Note that a special rear projection screen and qualified 
projector ceiling mount kit are required for this 
installation location.
Set Rear Ceiling in the SYSTEM SETUP: Basic > 
Projector Position menu after you turn the projector on.
4. Front Ceiling
Select this location with the projector suspended upside-
down from the ceiling in front of the screen.
Purchase a qualified projector ceiling mount kit from 
your dealer to mount your projector on the ceiling.
Set Front Ceiling in the SYSTEM SETUP: Basic > 
Projector Position menu after you turn the projector on. 
						

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Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting (if available), and the video format each factors in 
the projected image size.
4:3 is the native aspect ratio of EX321U-ST. To be able to project a complete 16:9 (widescreen) aspect ratio image, 
the projector can resize and scale a widescreen image to the projectors native aspect width. This will result in a 
proportionally smaller height equivalent to 75% of the projectors native aspect height.
Thus, a 16:9 aspect image will not utilize 25% of the height of a 4:3 aspect image displayed by this projector. This 
will be seen as darkened (unlit) bars along the top and bottom (vertical 12.5% height respectively) of the 4:3 
projection display area whenever displaying a scaled 16:9 aspect image in the vertical center of the 4:3 projection 
display area.
16:10 is the native aspect ratio of EW331U-ST. To be able to project a complete 16:9 (widescreen) aspect ratio image, 
the projector can resize and scale a widescreen image to the projectors native aspect width. This will result in a 
proportionally smaller height equivalent to 90% of the projectors native aspect height.
Thus, a 16:9 aspect image will not utilize 10% of the height of a 16:10 aspect image displayed by this projector. This 
will be seen as darkened (unlit) bars along the top and bottom (vertical 5% height respectively) of the 16:10 projection 
display area whenever displaying a scaled 16:9 aspect image in the vertical center of the 16:10 projection display area.
The projector should always be placed horizontally level (like flat on a table), and positioned directly perpendicular 
(90° right-angle square) to the horizontal center of the screen. This prevents image distortion caused by angled 
projections (or projecting onto angled surfaces). 
The modern digital projector does not project directly forward (like older style reel-to-reel film projectors did). 
Instead, digital projectors are designed to project at a slightly upward angle above the horizontal plane of the 
projector. This is so that they can be readily placed on a table and will project forward and upwards onto a screen 
positioned so that the bottom edge of the screen is above the level of the table (and everyone in the room can see the 
screen).
You can see from the diagram on page 14, that this type of projection causes the bottom edge of the projected image to 
be vertically offset from the horizontal plane of the projector.
If the projector is positioned further away from the screen, the projected image size increases, and the vertical offset 
also increases proportionately.
When determining the position of the screen and projector, you will need to account for both the projected image size 
and the vertical offset dimension, which are directly proportional to the projection distance.
When fine streaks are seen on projected images
This is due to interference with the screen surface and is not a mal-function. Replace the screen or displace the focus a 
little.
4:3 aspect image in a 4:3 aspect display area 16:9 aspect image scaled to a 4:3 aspect display area
4:3 aspect image in a 16:10 aspect display area 16:9 aspect image scaled to a 16:10 aspect display area 
						

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How to determine the position of the projector for a given screen size
1. Determine the aspect ratio of your screen, 16:9 or 4:3. If you have a 4:3 screen, refer to the table labeled 
(Standard). If you have a 16:9 screen, refer to the table labeled (16:9).
2. Select your screen size.
3. Refer to the table and find the closest match to your screen size in the left columns labeled Screen. Using this 
value, look across this row to the right to find the corresponding average distance from screen value in the 
column labeled Distance from the screen: L. This is the projection distance.
4. On that same row, look across to the right column and make note of the Hd value. This will determine the final 
vertical offset placement of the projector in relation to the edge of the screen.
5. The recommended position for the projector is aligned perpendicular to the horizontal center of the screen, at the 
distance from the screen determined in step 3 above, and offset by the value determined in step 4 above.
EX321U-ST: For example, if you are using a 4:3 aspect ratio, 100-inch screen, distance from the screen is 1.2 m and 
with a vertical offset of 23 cm.
EW331U-ST: For example, if you are using a 16:10 aspect ratio, 100-inch screen, distance from the screen is 1.1 m 
and with a vertical offset of 7 cm.
If you place the projector in a different position (to that recommended), you will have to tilt it down or up to center the 
image on the screen. In these situations, some image distortion will occur. Use the Keystone function to correct the 
distortion. See Correcting keystone on page 25 for details.
How to determine the recommended screen size for a given distance
This method can be used for situations where you have purchased this projector and would like to know what screen 
size will fit in your room.
The maximum screen size is limited by the physical space available in your room. 
1. Measure the distance between the projector and where you want to position the screen. This is the projection 
distance.
2. Refer to the table (Standard) or (16:9), and find the closest match to your measurement in the distance from 
the screen column. If the min and max values are available on the table, check that your measured distance is 
between the min and max distances listed on either side of the average distance value.
3. Using this value, look across that row to the left to find the corresponding Screen. That is the projected image 
size of the projector at that projection distance.
4. On that same row, look across to the right column and make note of the Hd value. This will determine the final 
placement of the screen in relation to the horizontal plane of the projector. 
EX321U-ST: For example, if your measured projection distance was 1.5 m and your screen aspect ratio is 4:3, the 
closest match in the Distance from the screen: L column is 1.5 m. Looking across this row shows that a 120-inch 
screen is required.
EW331U-ST: For example, if your measured projection distance was 1.5 m and your screen aspect ratio is 16:10, the 
closest match in the Distance from the screen: L column is from 1.6 m. Looking across this row shows that a 150-
inch screen is required. 
						

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Layout of the projector
Image size varies depending on the distance between the screen and the projector.
Front projection
(Standard)
EX321U-ST
EW331U-ST
Screen
Distance from the screen: L Hd
Diagonal Size Width: W Height: H
inch cm inch cm inch cm inch m inch cm
40 102 32 81 24 61 19 0.5 4 9
60 152 48 122 36 91 29 0.7 5 14
80 203 64 163 48 122 39 1.0 7 18
100 254 80 203 60 152 49 1.2 9 23
120 305 96 244 72 183 58 1.5 11 27
150 381 120 305 90 229 73 1.9 14 34
200 508 160 406 120 305 97 2.5 18 46
250 635 200 508 150 381 122 3.1 23 57
300 762 240 610 180 457 146 3.7 27 69
Screen
Distance from the screen: L Hd
Diagonal Size Width: W Height: H
inch cm inch cm inch cm inch m inch cm
50 127 42 108 26 67 21 0.5 1 3
60 152 51 129 32 81 25 0.6 2 4
80 203 68 172 42 108 33 0.8 2 5
100 254 85 215 53 135 41 1.1 3 7
120 305 102 258 64 162 50 1.3 3 8
150 381 127 323 79 202 62 1.6 4 10
200 508 170 431 106 269 83 2.1 5 13
250 635 212 538 132 337 104 2.6 7 17
270 686 229 582 143 363 112 2.8 7 18
300 762 254 646 159 404 124 3.2 8 20
W
L
HdH
B A
A=B
L: Between the screen and the front edge of the projector
H: Height of the projected image 
						

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(16:9)
EX321U-ST
EW331U-ST
The above figures are approximate and may be slightly different from the actual measurements. Mitsubishi recommends that if 
you intend to permanently install the projector, you should physically test the projection size and distance using the actual 
projector in suit before you permanently install it, so as to make allowance for this projectors optical characteristics. This will 
help you determine the exact mounting position so that it best suits your installation location.
Screen
Distance from the screen: L Hd
Diagonal Size Width: W Height: H
inch cm inch cm inch cm inch m inch cm
4010235892050 21 0.5 7 18
60 152 52 133 29 75 31 0.8 11 27
80 203 70 177 39 100 42 1.1 14 36
100 254 87 221 49 125 52 1.3 18 45
120 305 105 266 59 149 63 1.6 21 55
150 381 131 332 74 187 78 2.0 27 68
200 508 174 443 98 249 105 2.7 36 91
250 635 218 553 123 311 131 3.3 45 114
300 762 261 664 147 374 157 4.0 54 136
Screen
Distance from the screen: L Hd
Diagonal Size Width: W Height: H
inch cm inch cm inch cm inch m inch cm
50 127 44 111 25 62 22 0.6 3 7
60 152 52 133 29 75 26 0.7 3 8
80 203 70 177 39 100 35 0.9 4 11
100 254 87 221 49 125 44 1.1 5 14
120 305 105 266 59 149 52 1.3 6 16
150 381 131 332 74 187 65 1.7 8 21
200 508 174 443 98 249 87 2.2 11 27
250 635 218 553 123 311 109 2.8 13 34
270 686 235 598 132 336 118 3.0 15 37
300 762 261 664 147 374 131 3.3 16 41 
						

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Connection
When connecting a signal source to the projector, be sure to:
1. Turn all equipment off before making any connections.
2. Use the correct signal cables for each source.
3. Ensure the cables are firmly inserted. 
• See the owner’s guide of each device for details about its connections. 
• Contact your dealer for details about its connections. 
• In the connections shown below, some cables may not be included with the projector. They are commercially available 
from electronics stores.
Connecting a computer or monitor
Connecting a computer
The projector provides a RGB input socket that allows you to connect it to both IBM® compatibles and Macintosh® 
computers. A Mac adapter is needed if you are connecting legacy version Macintosh computers.
To connect the projector to a notebook or desktop computer:
1. Take the supplied RGB cable and connect one end to the D-Sub output socket of the computer.
2. Connect the other end of the RGB cable to the COMPUTER-1 or COMPUTER-2 signal input socket of the 
projector.
3. If you wish to make use of the projector speaker in your presentations, take a suitable audio cable and connect 
one end of the cable to the audio output jack of the computer, and the other end to the AUDIO IN jack of the 
projector.
4. If you wish, you can use another suitable audio cable and connect one end of the cable to the AUDIO OUT jack 
of the projector, and the other end to your external speakers (not supplied).
Once connected, the audio can be controlled by the projector On-Screen Display (OSD) menus. See Adjusting
the sound on page 32 for details.
The final connection path should be like that shown in the following diagram:
Many notebooks do not turn on their external video ports when connected to a projector. Usually a key combo like FN + F3 or 
CRT/LCD key turns the external display on/off. Locate a function key labeled CRT/LCD or a function key with a monitor symbol 
on the notebook. Press FN and the labeled function key simultaneously. Refer to your notebooks documentation to find your 
notebooks key combination.
• When you use a longer RGB cable instead of the provided cable, the image may not be projected correctly. 
• Some computers require additional connectors or analog RGB output adapters to be connected with this projector.
Notebook or desktop computer
RGB cable
orAudio cable (option)
Speakers
Audio cable 
(option) 
						

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Connecting a monitor
If you want to view your presentation close-up on a monitor as well as on the screen, you can connect the MONITOR 
OUT signal output jack on the projector to an external monitor following the instructions below:
To connect the projector to a monitor:
1. Connect the projector to a computer as described in Connecting a computer on page 16.
2. Connect the RGB cable from the monitor to the MONITOR OUT jack of the projector.
• Once the Standby Monitor Out function is on, the projector can output a VGA signal when it is in standby mode and an 
appropriate D-Sub input is made to the COMPUTER-1 jack.
• Images may not be displayed correctly depending on the type of the input signal. See the instruction manual of the 
monitor.
• Images may not be displayed correctly depending on the type of the cable.
Connecting Video source devices
You can connect your projector to various Video source devices that provide any one of the following output sockets:
• HDMI
• Component Video
•S-Video
• Video (composite)
You need only connect the projector to a Video source device using just one of the above connecting methods, 
however each provides a different level of video quality. The method you choose will most likely depend upon the 
availability of matching terminals on both the projector and the Video source device as described below:
HDMI (High-Definition Multimedia Interface) supports uncompressed video data transmission between compatible 
devices like DTV tuners, DVD players and displays over a single cable. It provides pure digital viewing experience. 
See Connecting an HDMI device on page 18 for how to connect the projector to an HDMI device.
Digital TV tuner and DVD players output Component Video natively, so if available on your devices, this should be 
your connection method of choice in preference to (composite) Video. See Connecting a Component Video source 
device on page 18 for how to connect the projector to a component video device.
If you have both composite Video and S-Video output terminals on your Video source device, you should elect to use 
the S-Video option. See Connecting an S-Video source device on page 19 for how to connect the projector to an S-
Video device.
If you have only composite Video output terminals on your Video source device, connect to Composite Video input. 
See Connecting a composite Video source device on page 20 for how to connect the projector to a composite Video 
device.
Notebook or desktop computer
RGB cable 
						

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Connecting an HDMI device
You should use an HDMI cable when making connection between the projector and HDMI devices.
To connect the projector to an HDMI device:
1. Take an HDMI cable and connect one end to the HDMI output port of the video device.
2. Connect the other end of the cable to the HDMI input port on the projector.
In the unlikely event that you connect the projector to a DVD player via the projectors HDMI input and the projected picture 
displays wrong colors, please change the color space to YUV. See Changing Color Space on page 24 for details.
When you connect this projector and a Digital device (such as a DVD player) via the HDMI terminal, black color may appear dark 
and deep, depending on the type of the connected device.
• This depends on the black level setting of the connected device. There are two kinds of methods to digitally transfer image 
data, in which different black level settings are employed respectively. Therefore, the specifications of the signals output 
from DVD players differ, depending on the type of the digital data transfer method they use.
• Some DVD players are provided with a function to switch the methods to output digital signals. When your DVD player is 
provided with such function, set it as follows.
EXPAND or ENHANCED -> NORMAL
• See the users guide of your DVD player for details.
• When you switch to HDMI input, the projected picture may display wrong colors for about 1 second. This is not product 
malfunction.
Connecting a Component Video source device
Examine your Video source device to determine if it has a set of unused Component Video output sockets available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to the device.
To connect the projector to a Component Video source device:
1. Take a Component Video to RGB (D-Sub) adaptor cable and connect the end with 3 RCA type connectors to the 
Component Video output sockets of the Video source device. Match the color of the plugs to the color of the 
sockets; green to green, blue to blue, and red to red.
2. Connect the other end of the Component Video to RGB (D-Sub) adaptor cable (with a D-Sub type connector) to 
the COMPUTER-1or COMPUTER-2 socket on the projector.
3. If you wish to make use of the projector speaker in your presentations, take a suitable audio cable and connect 
one end of the cable to the audio output jack of the computer, and the other end to the AUDIO IN jack of the 
projector.
4. If you wish, you can use another suitable audio cable and connect one end of the cable to the AUDIO OUT jack 
of the projector, and the other end to your external speakers (not supplied).
Once connected, the audio can be controlled by the projector On-Screen Display (OSD) menus. See Adjusting
the sound on page 32 for details.
AV device
HDMI cable (option) 
						

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The final connection path should be like that shown in the following diagram:
I
c
c
Connecting an S i eo so rce  e ice
amine your  ideo source device to determine if it has an unused S- ideo output socket available: 
 f so, you can continue with this procedure.
 f not, you will need to reassess which method you can use to connect to the device.
To connect the  rojector to an S i eo so rce  e ice:
. Take an S- ideo cable and connect one end to the S- ideo output socket of the  ideo source device.
. onnect the other end of the S- ideo cable to the SE socket on the projector.
. f you wish to make use of the projector speaker in your presentations, take a suitable audio cable and connect 
one end of the cable to the audio output jack of the computer, and the other end to the U  jack of the 
projector.
. f you wish, you can use another suitable audio cable and connect one end of the cable to the U UT jack 
of the projector, and the other end to your e ternal speakers  not supplied .
nce connected, the audio can be controlled by the projector  n-Screen  isplay  S  menus. See Adjusting 
the sound  on page  for details.
The final connection path should be like that shown in the following diagram:

						

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Connecting a composite Video source device
Examine your Video source device to determine if it has a set of unused composite Video output sockets available: 
• If so, you can continue with this procedure.
• If not, you will need to reassess which method you can use to connect to the device.
To connect the projector to a composite Video source device:
1. Take a Video cable and connect one end to the composite Video output socket of the Video source device.
2. Connect the other end of the Video cable to the VIDEO socket on the projector.
3. If you wish to make use of the projector speaker in your presentations, take a suitable audio cable and connect 
one end of the cable to the audio output jack of the computer, and the other end to the AUDIO IN jack of the 
projector.
4. If you wish, you can use another suitable audio cable and connect one end of the cable to the AUDIO OUT jack 
of the projector, and the other end to your external speakers (not supplied).
Once connected, the audio can be controlled by the projector On-Screen Display (OSD) menus. See Adjusting
the sound on page 32 for details.
The final connection path should be like that shown in the following diagram:
• If the selected video image is not displayed after the projector is turned on and the correct video source has been 
selected, check that the Video source device is turned on and operating correctly. Also check that the signal cables have 
been connected correctly.
• You need only connect to this device using a composite Video connection if Component Video and S-Video inputs are 
unavailable for use. SeeConnecting Video source devices on page 17for details.
AV deviceSpeakers
Video cable (option)
Audio cable (option)
Audio cable (option)