Mitsubishi Ex51u Projector User Manual

							ENGLISH
DATA PROJECTOR 
MODEL 
EX51U
User Manual 
This User Manual is important to you. 
Please read it before using your projector. 
EN 
						

							EN-2The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsu-
lated dangerous voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric 
shock. 
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and 
maintenance (servicing) instructions in the literature accompanying the appliance. 
WARNING Use the attached specified power supply cord. If you use another 
power supply cord, it may cause interference with radio and television 
reception. 
Use the attached RGB cable with this equipment so as to keep inter-
ference within the limits of an FCC Class B device.
This apparatus must be grounded. 
DO NOT LOOK DIRECTLY INTO THE LENS WHEN THE 
PROJECTOR IS IN THE POWER ON MODE. 
CAUTION Not for use in a computer room as defined in the Standard for the 
Protection of Electronic Computer/Data Processing Equipment, 
ANSI/NFPA 75. 
The attached power cord is to be used exclusively for this product. 
Never use it for other products.
When using the projector in Europe: 
COMPLIANCE NOTICE 
This Projector complies with the requirements of the EC Directive 
2004/108/EC EMC Directive and 2006/95/EC Low Voltage Direc-
tive. 
The electro-magnetic susceptibility has been chosen at a level that 
gains proper operation in residential areas, on business and light 
industrial premises and on small-scale enterprises, inside as well as 
outside of the buildings. All places of operation are characterized by 
their connection to the public low voltage power supply system. 
WARNING Use the attached RGB cable with this equipment so as to keep inter-
ference within the limits of an EN55022 Class B device.
Please follow WARNING instructions.  
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.  
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUT-
LET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.  
NOTE: SINCE THIS PROJECTOR IS PLUGGABLE EQUIPMENT, THE SOCKET-OUTLET SHALL BE INSTALLED NEAR THE EQUIPMENT AND 
SHALL BE EASILY ACCESSIBLE. 
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION : TO REDUCE THE RISK OF ELECTRIC
SHOCK,
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Note: This symbol mark is for 
EU countries only.
This symbol mark is according to 
the directive 2002/96/EC Article 
10 Information for users and 
Annex IV, and/or to the directive 
2006/66/EC Article 20 Informa-
tion for end-users and Annex II.Your MITSUBISHI ELECTRIC product is designed and manufactured with high quality 
materials and components which can be recycled and/or reused.
This symbol means that electrical and electronic equipment, batteries and accumula-
tors, at their end-of-life, should be disposed of separately from your household waste.
If a chemical symbol is printed beneath the symbol shown above, this chemical symbol 
means that the battery or accumulator contains a heavy metal at a certain concentra-
tion. This will be indicated as follows:
Hg: mercury (0,0005%), Cd: cadmium (0,002%), Pb: lead (0,004%)
In the European Union there are separate collection systems for used electrical and 
electronic products, batteries and accumulators.
Please, dispose of this equipment, batteries and accumulators correctly at your local 
community waste collection/recycling centre.
Please, help us to conserve the environment we live in! 
						

							EN-3
ENGLISH
Contents
Important safeguards................................................................................................................................ 4
Overview ................................................................................................................................................... 6
Remote control ......................................................................................................................................... 8
Installation ................................................................................................................................................ 9
Basic connections................................................................................................................................... 10
Preparation ............................................................................................................................................. 12
Basic operation ....................................................................................................................................... 13
Menu operation ....................................................................................................................................... 16
Image adjustment ................................................................................................................................... 21
Advanced features .................................................................................................................................. 23
Lamp replacement .................................................................................................................................. 25
Troubleshooting ...................................................................................................................................... 27
Indicators ................................................................................................................................................ 30
Specifications ......................................................................................................................................... 31
Trademark, Registered trademark 
Macintosh is registered trademark of Apple Computer Inc.
DLPTM, Digital Micromirror Device, DMD, and BrilliantColorTM are all trademarks of Texas Instruments.
Microsoft or Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.
Other brand or product names are trademarks or registered trademarks of their respective holders. 
Declaration of Conformity Model Number : EX51U
Trade Name : MITSUBISHI ELECTRIC 
Responsible party : Mitsubishi Digital Electronics America, Inc. 
9351 Jeronimo Road, Irvine, CA 92618 U.S.A 
Telephone number : +1-(949) 465-6000 
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 
(1) this device may not cause harmful interference, and 
(2) this device must accept any interference received, including interference that may cause undesired operation.  
						

							EN-4
Important safeguards
Please read all these instructions regarding your projector and retain 
them for future reference. Follow all warnings and instructions marked 
on the projector. 
1. Read instructions 
All the safety and operating instructions should be read before 
the appliance is operated. 
2. Retain instructions 
The safety and operating instructions should be retained for 
future reference. 
3. Warnings 
All warnings on the appliance and in the operating instructions 
should be adhered to. 
4. Instructions
All operating instructions must be followed. 
5. Cleaning
Unplug this projector from the wall outlet before cleaning it. Do 
not use liquid aerosol cleaners. Use a damp soft cloth for clean-
ing. 
6. Attachments and equipment 
Never add any attachments and/or equipment without the 
approval of the manufacturer as such additions may result in the 
risk of fire, electric shock or other personal injury. 
7. Water and moisture 
Do not use this projector near water or in contact with water. 
8. Accessories
Do not place this projector on an unstable cart, stand, tripod, 
bracket or table. Use only with a cart, stand, tripod bracket, or 
table recommended by the manufacturer or sold with the projec-
tor. Any mounting of the appliance should follow the manufac-
turer’s instructions and should use a mounting accessory 
recommended by the manufacturer. 
An appliance and cart combination should be moved with care. 
Quick stops, excessive force and uneven surfaces may cause 
the appliance and cart combination to overturn. 
9. Ventilation 
Slots and openings in the cabinet are provided for ventilation, 
ensuring reliable operation of the projector and to protect it from 
overheating. Do not block these openings or allow them to be 
blocked by placing the projector on a bed, sofa, rug, or book-
case. Ensure that there is adequate ventilation and that the man-
ufacturer’s instructions have been adhered to. 
10. Power sources 
This projector should be operated only from the type of power 
source indicated on the marking label. If you are not sure of the 
type of power, please consult your appliance dealer or local 
power company. 
11. Power-cord protection 
Power-supply cords should be routed so that they are not likely 
to be walked on or pinched by items placed upon or against 
them. Pay particular attention to cords at plugs, convenience 
receptacles, and points where they exit from the appliance. Do 
not put the power cord under a carpet. 12. Overloading 
Do not overload wall outlets and extension cords as this can 
result in a fire or electric shock. 
13. Objects and liquids 
Never push objects of any kind through openings of this projec-
tor as they may touch dangerous voltage points or short-out 
parts that could result in a fire or electric shock. Never spill liquid 
of any kind on the projector. 
14. Servicing 
Do not attempt to service this projector yourself. Refer all servic-
ing to qualified service personnel. 
15. Damage requiring service 
Unplug this projector from the wall outlet and refer servicing to 
qualified service personnel under the following conditions: 
(a) If the power-supply cord or plug is damaged. 
(b) If liquid has been spilled, or objects have fallen into the pro-
jector. 
(c) If the projector does not operate normally after you follow 
the operating instructions. Adjust only those controls that 
are covered by the operating instructions. An improper 
adjustment of other controls may result in damage and may 
often require extensive work by a qualified technician to 
restore the projector to its normal operation. 
(d) If the projector has been exposed to rain or water. 
(e) If the projector has been dropped or the  cabinet has been 
damaged. 
(f) If the projector exhibits a distinct change in performance - 
this indicates a need for service. 
16. Replacement parts 
When replacement parts are required, be sure that the service 
technician has used replacement parts specified by the manu-
facturer or parts having the same characteristics as the original 
part. Unauthorized substitutions may result in fire, electric shock 
or other hazards. 
17. Safety check 
Upon completion of any service or repair to this projector, ask 
the service technician to perform safety checks determining that 
the projector is in a safe operating condition.  
						

							EN-5
ENGLISH
WARNING: 
Unplug immediately if there is something wrong with 
your projector. 
Do not operate if smoke, strange noise or odor comes out of your pro-
jector. It may cause fire or electric shock. In this case, unplug immedi-
ately and contact your dealer. 
Never remove the cabinet. This projector contains high voltage circuitry. An inadvertent contact 
may result in an electric shock. Except as specifically explained in 
User Manual, do not attempt to service this product by yourself. 
Please contact your dealer when you want to fix, adjust, or inspect the 
projector. 
Do not modify the projector. It can lead to fire or electric shock. 
Do not keep using the damaged projector. If the projector is dropped and the cabinet is damaged, unplug the 
projector and contact your dealer for inspection. It may lead to fire if 
you keep using the damaged projector. 
Do not face the projection lens to the sun. It can lead to fire. 
Use correct voltage. If you use incorrect voltage, it can lead to fire. 
Do not place the projector on uneven surface. Place the projector on a level and stable surface only.  
Do not look into the lens when the projector is operating. It may hurt your eyes. Never let children look into the lens when the 
projector is on. 
Do not unplug the power cord during operation. It can lead to lamp breakage, fire, electric shock or other trouble. Wait 
for the fan to stop before unplugging the power cord. 
Do not touch the air outlet grilles and bottom plate. Do not touch them or put other equipment close to the air outlet grilles 
because they become hot during operation. The heated air outlet 
grilles and bottom plate may cause injury or damage to other equip-
ment. Also, do not put the projector on a desk that is easily affected by 
heat. 
Do not look into the air outlet grilles when projector is 
operating. 
Heat, dust, etc. may blow out of them and hurt your eyes. 
Do not block the air inlet and outlet grilles. If they are blocked, heat may be generated inside the projector, caus-
ing deterioration in the projector quality and fire. 
Do not use flammable solvents (benzene, thinner, etc.) 
and flammable aerosols near the projector.
Flammable substances may ignite causing fire or breakdown because 
the temperature inside the projector rises very high while the lamp is 
illuminating.
Do not use the projector with condensation on it.It can lead to breakdown or other failure.
Place of installation For safety’s sake, do not use the projector at any place subjected to 
high temperature and high humidity. Please maintain an operating 
temperature, humidity, and altitude as specified below. 
 Operating temperature: between +41°F (+5°C) and +95°F (+35°C) 
 Operating humidity: between 30% and 90% 
 Never put any heat-producing device under the projector to pre-
vent the projector from being overheated. 
 Do not install the projector at a place that is unstable or subject to 
vibration. 
 Do not install the projector near any equipment that produces a 
strong magnetic field. Also refrain from installing the projector near 
any cable carrying a large amount of current. 
 Place the projector on a solid, vibration-free surface. Otherwise it 
may fall, causing serious injury or damage. 
 Do not stand the projector on its end. It may fall, causing serious 
injury or damage. 
 Slanting the projector more than ±10° (right and left) or ±15° (front 
and rear) may cause trouble or explosion of the lamp. 
 Do not place the projector near air-conditioning unit, heater, or 
humidifier to avoid hot or moist air to the exhaust and ventilation 
hole of the projector.
Lamp replacementBe sure to use the lamp attachment unit designed specifically for this 
projector when replacing the lamp with a new one. Lamp fragments 
may fall from the inside if the lamp were broken.
COMPLIANCE NOTICE OF FCC This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. 
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment gen-
erates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harm-
ful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this 
equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference by one or more of the following measures: 
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
 Consult the dealer or an experienced Radio / TV technician for help. 
Changes or modifications not expressly approved by Mitsubishi could void the user’s authority to operate this equipment.
COMPLIANCE NOTICE OF INDUSTRY CANADA This Class B digital apparatus complies with Canadian ICES-003.  
						

							EN-6
Overview
1FOCUS ring
2ZOOM ring
3 Control panel
4 Air inlet grille
5 Remote control sensor (Front)
6 Air inlet grille
7 Air outlet grille
8 Terminal board
9 Speaker
10 Adjustment feet (front)
11 Adjustment feet (rear)
12 Lock bar
13 Foot Adjustment button (Front)
14 Lamp cover
Caution:Do not replace the lamp immediately after using the pro-
jector because the lamp would be extremely hot and it 
may cause burns.
Control panel
1 Power button
2 AUTO POSITION / S button
3 COMPUTER / W button
4 MENU button
5 STATUS indicator
6 POWER indicator
7 KEYSTONE/ENTER button
8 VIDEO/ X button
9T button
Important: While the menu or the screen for the keystone adjust-
ment or password entry is being displayed, the COM-
PUTER, VIDEO, and AUTO POSITION buttons 
function as the W, X, and S buttons respectively.
 While the menu is on the screen, the KEYSTONE but-
ton functions as the ENTER button.
Terminal board
1Power jack
2 COMPUTER IN terminal (1, 2) (Mini D-SUB 15-pin)
3 MONITOR OUT terminal (Mini D-SUB 15-pin)
4 Remote control sensor (Rear)
5 USB (COMPUTER) terminal
6 AUDIO IN terminal (Mini jack)
7 AUDIO OUT terminal (Mini jack)
8 S-VIDEO terminal
9 VIDEO terminal
10 Lock bar
11 SERIAL (RS-232C) terminal (D-SUB 9-pin)
12 AUDIO L/R terminals
13 Kensington Lock
Kensington LockThis projector has a Kensington Security Standard con-
nector for use with Kensington MicroSaver Security Sys-
tem.
Refer to the information that came with the Kensington 
System for instructions on how to use it to secure the pro-
jector. Please contact Kensington Technology Group 
below.
Kensington Technology Group
2855 Campus Drive
San Mateo, CA 94403, U.S.A.
Phone: +1- (650)572-2700 Fax: +1- (650)572-9675
36414 21
10
513
118912117
7
4 9 32
8
6
1
5
389671154132
12110 
						

							EN-7
ENGLISH
Overview (continued)
Bottom side
1 Adjustment feet (rear)
2 Adjustment feet (front)
Remote control
1ON button
2 MAGNIFY button
3 VOLUME UP, DOWN buttons
4 KEYSTONE button
5 MENU button
6ENTER button
7 AV (Audio/Video) MUTE button
8 OFF button
9 ASPECT button
10 PAGE UP, DOWN buttons
11 AUTO POSITION button
12 Direction buttons
13 FREEZE button
14 VIDEO, S-VIDEO buttons
15 COMPUTER (1, 2) buttons
 The UP and DOWN buttons are used in the KEY-
STONE adjustment in addition to the volume control.
2
1
STANDBY ON
ASPECT MAGNIFY
KEYSTONEVOL PAGE
UP
DO
WN
MENU
FREEZE AU TO
POSITION
AV
MUTE
ENTER
1
2
COMPUTERVIDEOVIEWER
UNPLUGS-
VIDEO
POWER1
2
3
4
5
6
78
9
10
14
15 11
12
13
This model does not have
this function. 
						

							EN-8
Remote control
Battery installationUse two (AA, R6) size batteries.
1. Remove the back cover of the remote control by pushing the battery compartment door in the direction of the arrow.
2. Load the batteries making sure that they are positioned correctly (+ to +, and - to -).
 Load the batteries from - spring side, and make sure to set them tightly.
3. Replace the back cover.
Caution: Use of a battery of wrong type may cause explosion.
 Only Carbon-Zinc or Alkaline-Manganese Dioxide type batteries should be used.
 Dispose of used batteries according to your local regulations.
 Batteries may explode if misused. Do not recharge, disassemble, or dispose of in fire.
 Be sure to handle the battery according to the instructions.
 Load the battery with its positive (+) and negative (-) sides correctly oriented as indicated on the remote control.
 Keep batteries out of reach of children and pets.
 Remove the battery, if the remote control is not used for a long time.
 Do not combine a new battery with an old one.
 If the solution of batteries comes in contact with your skin or clothes, rinse with water. If the solution comes in contact with your eyes, rinse them 
with water and then consult your doctor.
Operation range (of the remote control)The maximum operation distance of the remote control is about 10 m (or about 32 feet) when the remote control is pointed at the remote control 
sensor of the projector. When the remote control is pointed to the screen, the distance from the remote control to the projector via the screen should 
be 5 m or less. However, the operation distance varies depending on the type of the screen used.
Reception angle (vertical)
Important:
 Do not expose the remote control sensor to direct sunlight or fluorescent. Keep a distance at least 2 m (6.5 feet) between the remote control sen-
sor and the fluorescent light to ensure correct operation of the remote control.
Inverted fluorescent light, if located near the projector, may interfere the remote control.
 When you use the remote control too close to the remote control sensor, the remote control may not work correctly.
Reception angle (horizontal) Reception angle (vertical), ceiling mount 
						

							EN-9
ENGLISH
Installation
Layout of the projectorImage size varies depending on the distance between the screen and the projector.
Front projection
 The above figures are approximate and may be slightly different from the actual measurements.
Front projection, ceiling mountingFor 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 using the projector mounted on the ceiling, set IMAGE 
REVERSE in the INSTALLATION menu to MIRROR INVERT. See 
page 18.
 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.
Rear projectionAsk a specialist for installation. For details, consult your dealer.
 For rear projection, set IMAGE REVERSE in the INSTALLATION 
menu to MIRROR. See page 18.
Caution: Placing the projector directly on a carpet impairs ventilation by the 
fans, causing damage or failure. Put a hard board under the pro-
jector to facilitate ventilation.
 Place the projector at least 50 cm (or 20 inch) away from the wall 
to prevent the air inlet grille and the air outlet grilles that emit hot 
air from being blocked.
 Do not use the projector in the following locations and manners, 
which may cause fire or electric shock.
 In a dusty or humid place.
 In a sideways or upside-down position.
 Near a heater.
 In an oily, smoky, or damp place such as a kitchen.
 In direct sunlight.
 Where the temperature rises high, such as in a closed car.
 Where the temperature is lower than +41°F (or +5°C) or higher 
than +95°F (or +35°C ).
Important: Do not apply force to the lens, because the lens may be damaged.
 We dont recommend using the projector at an altitude of 1500 
meters or higher. Use at an altitude of 1500 meters or higher may 
affect the projectors life.
Screen Distance from the screen : L
Hd
Diagonal size Width : W Height : H Shortest (WIDE) Longest (TELE)
inch cm inch cm inch cm inch m inch m inch cm
4010232812461 51 1.3 62 1.6 1.8 5
60 152 48 122 36 91 77 2.0 94 2.4 2.7 7
80 203 64 163 48 122 103 2.6 125 3.2 3.6 9
100 254 80 203 60 152 129 3.3 157 4.0 4.5 11
150 381 120 305 90 229 195 4.9 236 6.0 6.8 17
200 508 160 406 120 305 260 6.6 315 8.0 9.0 23
250 635 200 508 150 381 326 8.3 394 10.0 11.3 29
300 762 240 610 180 457 391 9.9 – – 13.5 34
W
L
HdH
B A
A=B
L : Between the screen and the front edge of the projector
Hd : Height of the projected image 
						

							EN-10
Basic connections
This projector can be connected with various devices such as a VCR, video camera, videodisc player, and personal computer that have analog RGB 
output connectors. 
Important:  Make sure that the connected device is turned off before starting connection. 
 Plug in the power cords of the projector and the connected devices firmly. When unplugging, hold and pull the plug. Do not pull the cord. 
 When the projector and the connected devices are located too close to each other, the projected image may be affected by their interference. 
 See the owner’s guide of each device for details about its connections. 
Projector + AV device 
Important:  Match the colors of the video and audio plugs on the Audio cable with those of the terminals.
 Speaker output is mono. 
Projector + DVD player or HDTV decoder Some DVD players have an output connector for 3-line fitting (Y, CB, CR). When connecting such DVD player with this projector, use the
COMPUTER IN terminal. 
Important:  The terminal’s names Y, PB, and PR are given as examples of when a HDTV decoder is connected. 
 The terminal’s names vary depending on the connected devices. 
 Use a Mini D-SUB 15-pin - BNC conversion cable for connection. 
 Image may not be projected correctly with some DVD players. 
 When connecting a HDTV decoder having RGB output terminals, set COMPUTER INPUT to RGB in the SIGNAL menu. 
S-VIDEO IN
(option)
AUDIO IN
(option)
to audio output (L)
to audio output (R)
to S-video output VCR, etc.AUDIO L
AUDIO R(option)* A mini-plug audio cable can also be used.
BR
DVD player or HDTV decoder Audio cable (option)
to audio output
BNC - RCA connector (option)
No connection
COMPUTER IN
Mini D-SUB 15-pin - BNC conversion 
cable (option)