Mitsubishi Electric Mdt421s Users Manual

							 42 LCD Display Monitor
USER’S MANUAL
BEDIENERHANDBUCH
MANUAL DEL USUARIO
MANUEL UTILISATEUR
MANUALE UTENTE
GEBRUIKERSHANDLEIDING
 
						

							English
English-1 Important Information ...................................................................................................................................  English-2
Safety Precautions, Maintenance & Recommended Use  ...........................................................................  English-4
Contents .......................................................................................................................................................  English-5
Parts Name and Functions  ..........................................................................................................................  English-6
  Buttons, Switch, and Indicator .......................................................................................................  English-6
  Connectors and Terminals ..............................................................................................................  English-7
  Wireless Remote Control  ...............................................................................................................  English-8
  < Operating Range for the Remote Control > ...........................................................................   English-9
  < Handling the remote control > ...............................................................................................  English-9
Setup Procedure ..........................................................................................................................................  English-10
  CAT5 video connection ...................................................................................................................  English-12
How to Mount and Attach Options to the LCD Monitor ...............................................................................  English-14
Connections .................................................................................................................................................  English-15
 Wiring Diagram ...............................................................................................................................  English-15
  Connecting a Personal Computer ..................................................................................................  English-16
  Connecting with Digital Interface Equipment  ................................................................................  English-17
  Connecting a DVD Player with component output / HDMI output / DVI output .............................  English-18
  Connecting to a VCR / Stereo Amplifi er .........................................................................................   English-19
Basic Operation ............................................................................................................................................  English-20
  Power ON and OFF Modes ............................................................................................................  English-20
 Power Indicator ............................................................................................................................... English-21
  Using Power Management  ............................................................................................................  English-21
  Selecting a video source ................................................................................................................  English-21
 Picture Size  ....................................................................................................................................  English-21
 Picture Mode ..................................................................................................................................  English-21
  Audio Source Switching .................................................................................................................  English-21
  Control Lock Mode .........................................................................................................................  English-21
 Information OSD .............................................................................................................................  English-22
OSD (On-Screen-Display) Controls ..............................................................................................................  English-23
 PICTURE .........................................................................................................................................  English-24
 SCREEN ..........................................................................................................................................  English-26
 AUDIO .............................................................................................................................................  English-27
  PIP (PICTURE IN PICTURE) ............................................................................................................  English-27
 CONFIGURATION 1 ........................................................................................................................  English-28
 CONFIGURATION 2 ........................................................................................................................  English-29
 ADVANCED OPTION ......................................................................................................................  English-30
 NOTE ..............................................................................................................................................  English-32
  < IMAGE PERSISTENCE > .......................................................................................................  English-32
  < For long life use of Public Display > ...................................................................................... English-32
  < HOW TO SETUP SCHEDULE > .............................................................................................   English-32
  < PIP, POP and SIDE BY SIDE > ...............................................................................................  English-33
  < Supplemental information of the auto brightness function > ................................................   English-33
  < Remote control numbering function > ...................................................................................   English-34
Controlling the LCD monitor via RS-232C/RS-485 Remote Control  ..........................................................   English-35
Features ........................................................................................................................................................  English-37
Troubleshooting ............................................................................................................................................  English-38
Specifi cations  ..............................................................................................................................................  English-40
Pin Assignment ............................................................................................................................................  English-41
Index
 
						

							English-2
Important Information
DECLARATION OF CONFORMITY
This device complies with Part 15 of 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.
      U.S. Responsible Party:  Mitsubishi Digital Electronics America, Inc.
   Address:  9351 Jeronimo Road,
      Irvine, California 92618 U.S.A.
   Tel. No.:   +1 - (949) 465-6000
   Type of Product:  Computer Monitor
   Equipment Classifi cation:   Class B Peripheral
   Model:   MDT421S
 (DR854)
We hereby declare that the equipment specifi ed above
conforms to the technical standards as specifi ed in the FCC Rules.
Windows is a registered trademark of Microsoft Corporation. All other brands and product names are trademarks or 
registered trademarks of their respective owners.
HDMI, the HDMI logo and High-Defi nition Multimedia Interface are trademarks or registered trademarks of HDMI 
Licensing LLC.
The DisplayPort Icon is a trademark of the Video Electronics Standards Association, registered in the U.S. and other 
countries.
Canadian Department of Communications Compliance Statement
DOC: This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
C-UL: Bears the C-UL Mark and is in compliance with Canadian Safety Regulations according to CAN/CSA C22.2
No. 60950-1.
FCC Information
1.  Use the attached specifi ed cables with the MDT421S (DR854) color monitor so as not to interfere with radio and television 
reception.
(1)  Please use the supplied power cord or equivalent to ensure FCC compliance.
(2)  Please use the supplied shielded video signal cable, 15-pin mini D-SUB to 15-pin mini D-SUB.
2.  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 generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the 
instructions, may cause harmful 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 your dealer or an experienced radio/TV technician for help.
If necessary, the user should contact the dealer or an experienced radio/television technician for additional suggestions. 
The user may fi nd the following booklet, prepared by the Federal Communications Commission, helpful: “How to Identify 
and Resolve Radio-TV Interference Problems.” This booklet is available from the U.S. Government Printing Offi ce, 
Washington, D.C., 20402, Stock No. 004-000-00345-4.
 
						

							English
English-3
Important Information
TO REDUCE THE RISK OF ELECTRIC SHOCK, MAKE SURE POWER CORD IS UNPLUGGED FROM
WALL SOCKET. TO FULLY DISENGAGE THE POWER TO THE UNIT, PLEASE DISCONNECT THE
POWER CORD FROM THE AC OUTLET. DO NOT REMOVE COVER (OR BACK). NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol warns user that uninsulated voltage within the unit may have suffi cient magnitude to cause
electric shock. Therefore, it is dangerous to make any kind of contact with any part inside this unit.
This symbol alerts the user that important literature concerning the operation and maintenance of this unit
has been included. Therefore, it should be read carefully in order to avoid any problems.
CAUTION
TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. ALSO, DO NOT USE THIS 
UNIT’S POLARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLETS UNLESS THE PRONGS CAN BE 
FULLY INSERTED.
REFRAIN FROM OPENING THE CABINET AS THERE ARE HIGH VOLTAGE COMPONENTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This LCD Monitor uses a lamp that contains mercury. Disposal of the lamp or the LCD Monitor with the lamp
may be regulated due to environmental considerations. For disposal or recycling information, please contact
your local authorities or the Electronic Industries Alliance: www.eiae.org. (For US only).
CAUTION
Declaration
Declaration of the Manufacturer
We hereby certify that the color monitor MDT421S (DR854)
is in compliance with
Council Directive 2006/95/EC:
  – EN 60950-1
Council Directive 2004/108/EC:
  – EN 55022
  – EN 61000-3-2
  – EN 61000-3-3
  – EN 55024
Declaration of the Manufacturer  
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 Information 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 accumulators, 
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 concentration. 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! and marked with
Mitsubishi Electric Corporation
2-7-3, Marunouchi,
Chiyoda-Ku
Tokyo 100-8310, Japan
CAUTION
WARNING
 
						

							English-4
•   The power cable connector is the primary means of 
  detaching the system from the power supply. The monitor 
should be installed close to a power outlet, which is easily 
accessible.
•   Handle with care when transporting. Save packaging for 
transporting.
•   Please clean the holes of back cabinet to reject dirt and 
dust at least once a year because of set reliability.
•   If using the cooling fan continuously, it’s recommended to 
wipe holes a minimum of once a month.
•   When installing the remote control batteries;
-   Align the batteries according to the (+) and (-) 
  indications inside the case.
-  Align the (-) indication of the battery fi rst inside the 
case.
CAUTION:
Immediately unplug your monitor from the wall outlet and re-
fer servicing to qualifi ed service personnel under the following 
conditions:
•   When the power supply cord or plug is damaged.
•   If liquid has been spilled, or objects have fallen into the 
monitor.
•  If the monitor has been exposed to rain or water.
•  If the monitor has been dropped or the cabinet damaged.
•  If the monitor does not operate normally by following 
 operating instructions.
Recommended Use
CAUTION:
•   For optimum performance, allow 20 minutes for warm-up.
•   Rest your eyes periodically by focusing on an object at 
least 5 feet away. Blink often.
•   Position the monitor at a 90° angle to windows and other 
light sources to minimize glare and refl ections.
•  Clean the LCD monitor surface with a lint-free, non-
abrasive cloth. Avoid using any cleaning solution or glass 
cleaner!
•   Adjust the monitor’s brightness, contrast and sharpness 
controls to enhance readability.
•   Avoid displaying fi xed patterns on the monitor for long 
periods of time to avoid image persistence (after image 
effects).
•   Get regular eye checkups.
Ergonomics
To realize the maximum ergonomic benefi ts, we recommend 
the following:
•   Use the preset Size and Position controls with standard 
signals.
•   Use the preset Color Setting.
•   Use non-interlaced signals.
•   Do not use primary color blue on a dark background, as 
it is diffi cult to see and may produce eye fatigue due to 
insuffi cient contrast. FOR OPTIMUM PERFORMANCE, PLEASE NOTE
THE FOLLOWING WHEN SETTING UP AND USING
THE LCD COLOR MONITOR:
•  DO NOT REMOVE MONITOR BACK COVER. There are 
no user serviceable parts inside and opening or removing 
covers may expose you to dangerous shock hazards or 
other risks.
  Refer all servicing to qualifi ed service personnel.
•   Do not spill any liquids into the cabinet or use your 
  monitor near water.
•   Do not insert objects of any kind into the cabinet slots, as 
they may touch dangerous voltage points, which can be 
harmful or fatal or may cause electric shock, fi re or 
 equipment failure.
•   Do not place any heavy objects on the power cord. 
  Damage to the cord may cause shock or fi re.
•   Do not place this product on a sloping or unstable cart, 
stand or table, as the monitor may fall, causing serious 
damage to the monitor.
•   When operating the  LCD monitor with an AC 100-120V 
power supply in North America, use a power supply cord 
provided with this monitor.
•   When operating the LCD monitor with an AC 220-240V 
power supply in Europe, use a power supply cord 
  provided with this monitor.
•   In UK, use a BS-approved power cord with molded plug 
having a black (10A) fuse installed for use with this 
 monitor.
  If a power cord is not supplied with this monitor, please 
contact your supplier.
•   When operating the LCD monitor with a 220-240V AC 
power supply  in Australia, use the power cord provided 
with this monitor.  
  If a power cord is not supplied with this monitor, please 
contact your supplier.
•   For all other cases, use a power cord that matches the 
AC voltage of the power outlet and has been approved by 
and complies with the safety standard of your particular 
country.
•   Do not place any objects onto the monitor and do not use 
the monitor outdoors.
•  The inside of the fl uorescent tube located within the LCD 
monitor contains mercury. Please follow the laws or rules 
of your municipality to dispose of the tube properly.
•   Do not bend power cord.
•   Do not use monitor in high temperature, humid, dusty, or 
oily areas.
•   If monitor or glass is broken, do not come in contact with 
the liquid crystal and handle with care.
•   If the LCD monitor is damaged and the liquid crystal leaks 
out, do not inhale or swallow it.
•   Allow adequate ventilation around the monitor, so that 
heat can properly dissipate. Do not block ventilated 
  openings or place the monitor near a radiator or other 
heat sources.
  Do not put anything on top of the monitor.
Safety Precautions, Maintenance & Recommended Use
 
						

							English
English-5
Contents
* Remember to save your original box and packing material to transport or ship the monitor. Your new MDT421S monitor box* should contain the following:
• LCD monitor
•  Power Cord (3 m) 
•  Video Signal Cable (4 m)
•  User’s Manual    
•  Wireless Remote Control and AAA Batteries
•  Clamper x 2 (To prevent from falling)
•  Clamper x 3 (For securing cables)
•  Clamper x 2 (For securing the power cord, HDMI cable, and 
Display Port cable)•  Screw for Clamper (To prevent from falling) x 2
The following components are prepared as option.
• External Speakers
• Stands
• Bezel
• CAT5 Kit
Screw for Clamper
 (M4) x 2Video Signal Cable 
(D-SUB to D-SUB Cable) User’s Manual
Clamper x 3
(For securing cables)Clamper x 2
(To prevent from falling) Clamper x 2
(For securing the power cord, 
HDMI cable, and Display Port cable)
* The supplied power cord varies depending on destination.
For EUFor North
America
Power cord
* For all other case, use a power cord that matches the AC voltage 
of the power outlet and has been approved by and complies with 
the safety standard of your particular country.Wireless Remote Control
and AAA Batteries
 42 LCD Display MonitorUSER’S MANUAL
BEDIENERHANDBUCH
MANUAL DEL USUARIO
MANUEL UTILISATEUR
MANUALE UTENTE
GEBRUIKERSHANDLEIDING
 
						

							English-6
ON
OFF
 UP () button
Activates the OSD menu when the OSD menu is turned-off.
Acts as 
 button to move the highlighted area up to select 
the adjustment with OSD menu.
 DOWN () button
Activates the OSD menu when the OSD menu is turned-off.
Acts as 
 button to move the highlighted area down to select 
the adjustment with OSD menu.
 EXIT button
Press the EXIT button to display the OSD menu while it isn’t 
being displayed. 
By pressing this button while the OSD menu is being 
displayed, you can move backward through the menu items. 
(You can move forward through the menu items using the 
INPUT button.) When you press this button at the Main Menu, 
the OSD menu disappears. (See page 23.)
  Brightness sensor (front, rear)
Sensor for the auto brightness function. (See page 25, 33.)
  Main Power Switch
On/Off Switch to turn main power on/off.
NOTE:  Control Key Lock Mode
This control completely locks out access to all Control Key 
functions.  To activate the control key lock function, press 
both of  “
” and “” and hold down simultaneously for 
more than 3 seconds.  To resume back to user mode, press 
both of “
” and “” and hold simultaneously for three (3) 
seconds.
  Remote control sensor and Power indicator
Receives the signal from the remote control (when using the 
wireless remote control).  See also page 9.
Glows green when the LCD monitor is in active and glows 
red when the LCD is in POWER OFF mode.  When the LCD is 
in power save mode, it will glow both green and red.  When 
SCHEDULE is enabled, it will blink green and glow red.  See 
page 21.  In the case of where a failure is detected, it will blink 
red.
  POWER button ()
Switches the power on/off. See also page 20.
 MUTE button
Switches the audio mute ON/OFF.
 INPUT button
Displays the OSD menu for switching the video input.
(Select [RGB1], [RGB2], [RGB3], [RGB4], [RGB5]*, [RGB6], 
[DVD/HD], [VIDEO] and [VIDEO] using the UP (
) and 
DOWN (
) buttons.) 
* : [RGB 5] becomes usable when the optional CAT5 Rx BOX 
is mounted.
By pressing this button while the OSD menu is being 
displayed, you can move forward through the menu items.  
(See page 23.)
  PLUS (+) button
Acts as (+) button to increase the adjustment with OSD menu.
Increase the audio output level when the OSD menu is turned 
off. 
  MINUS (-) button
Acts as (-) button to decrease the adjustment with OSD menu.  
Decreases the audio output level when the OSD menu is 
turned off.
Buttons, Switch, and Indicator 
Parts Name and Functions
 
						

							English
English-7
  EXTERNAL SPEAKER TERMINAL
To output the audio signal for external speakers from  AUDIO 1, 
2, 3 jack or HDMI.
 AUDIO OUT
To output the audio signal from the AUDIO IN 1, 2, 3 jack or 
HDMI.
  AUDIO IN 1, 2, 3
To input the audio signal from external equipment such as a 
computer, VCR or DVD player.
  RGB 1 IN (HDMI)
To input the digital RGB signals from a computer, DVD player, 
etc.
* This connector does not support analog input.
  AUDIO is supported via HDMI.
  RGB 2 IN (DVI-D)
To input the digital RGB signals from a computer.
* This connector does not support analog input.
  AUDIO is supported via DVI-D.
  RGB 3 IN (mini D-Sub 15 pin)
To input the analog RGB signals from a computer or other 
RGB equipment.
  RGB OUT (mini D-Sub 15 pin)
To output the signal from RGB 3, 4 or 5 IN.
  RGB 6 IN (DISPLAY PORT)
To input the digital RGB signals from a computer.
  CAT5 Rx BOX slot
The CAT5 Rx BOX (option) is inserted in this slot. (See page 
12.)
NOTE:
Never connect network devices to the CAT5 IN and OUT 
connectors. If you do so, they may adversely affect with each 
other, causing breakdown.
  EXTERNAL CONTROL (mini D-Sub 9 pin) 
Connect the IN connector with the RS-232C OUT connector 
of the computer or a multi-connected MDT421S monitor. 
Connect the OUT connector with the RS-232C IN connector 
of a multi-connected MDT421S or MDT521S monitor. 
 VIDEO IN/OUT
VIDEO IN connector (BNC and RCA): To input a composite 
video signal.  BNC and RCA are not available at the same 
time. (Use only one input).
VIDEO OUT connector (BNC): To output the composite 
video signal from VIDEO IN connector.
S-VIDEO IN connector (MINI DIN 4 pin): To input the 
S-video (Y/C separate signal).
  RGB 4 IN / DVD/HD IN (BNC)
To input the analog RGB signals from a computer or other 
RGB equipment.
Connecting equipment such as a DVD player, HDTV device, 
or Laser disc player. See page 16, 18.
  AC IN connector
Connects with the supplied power cord.
Connectors and Terminals
(OUT)
(IN)
(OUT)
(IN)
(IN)
(IN)
 
						

							English-8
Wireless Remote Control
 POWER button
Switches the power on/off. 
* If LED Power Indicator on the monitor is not glowing, then 
no controls will work.
 INPUT button
Selects from input signal, [RGB1] (HDMI),  [RGB2] (DVI-D),  
[RGB3] (D-SUB),  [RGB4] (BNC), [RGB5]* (CAT5), [RGB6] (DIS-
PLAY PORT), [DVD/HD] (YPbPr), [VIDEO] and [VIDEO].
* : [RGB 5] becomes usable when the optional CAT5 Rx BOX 
is mounted. 
  PICTURE MODE button
Selects from picture mode, [HIGHBRIGHT],  [STANDARD],  
[sRGB], [CINEMA].  See page 21.
HIGHBRIGHT: for moving image such as Video
STANDARD: for images (Factory setting)
sRGB: for text based images
CINEMA: for movies 
 DISPLAY button
To switch the information OSD on/off.  See page 22.
 SET button
Acts as SET button with OSD menu.
  MINUS button decrease
Acts as (-) button to decrease the adjustment with OSD menu.
Small screen which adjusted “PIP” mode moves left.
  AUTO SETUP button
To enter the auto setup menu.  See page 28.
  AUDIO INPUT button
Press to change the audio source for each video source. The 
audio source is changed from [AUDIO1] to [AUDIO2], [AUDIO3] 
and [HDMI] in order. Note that you cannot select the audio 
source for [VIDEO] or [VIDEO]. [HDMI] is selectable only 
when the video source is [RGB 1]. 
  PIP (Picture In Picture) button
ON/OFF button: PIP-ON/OFF.  See page 27, 33.
INPUT button: Select the “picture in picture” input signal.
CHANGE button: Replaces to the main picture and sub pic-
ture.
Note:
The “PIP” and “POP” modes do not function when the screen 
size is “CUSTOM” or “REAL”.
 STILL button
ON/OFF button: To switch the still picture mode on/off.
CAPTURE button: Updates the still picture.
 SIZE button
Selects picture size, [FULL], [NORMAL], [CUSTOM] , [DY-
NAMIC] and [REAL]. See page 21.
 MENU button
To switch the menu mode on/off.
 UP button
Acts as  button to move the highlighted area up to select 
the adjustment with OSD menu.
Small screen which adjusted “PIP” mode moves up.
  PLUS button increase
Acts as (+) button to increase the adjustment with OSD menu.
Small screen which adjusted “PIP” mode moves right.
 EXIT button
Turn to previous menu with OSD menu. 
 DOWN button
Acts as  button to move the highlighted area down to select 
the adjustment with OSD menu.
Small screen which adjusted “PIP” mode moves down.
 MUTE button
To switch the mute function on/off.
  VOLUME  button
Increases or decreases the audio output level. 
 
						

							English
English-9
< Operating Range for the Remote   
Control >
Point the top of the remote control toward the LCD monitors 
remote sensor during button operation.
Use the remote control within a distance of about 7 m/23 ft. 
from the front of the LCD monitors remote control sensor 
and at a horizontal and vertical angle of within 30° within a 
distance of about 3 m/10 ft.
CAUTION:
Important, the remote control system may not function when 
direct sunlight or strong illumination strikes the remote control 
sensor of the LCD monitor, or when there is an object in the 
path.
< Handling the remote control >
*  Do not subject to strong shock.
*  Do not allow water or other liquid to splash the remote 
control. If the remote control gets wet, wipe it dry immedi-
ately.
*  Avoid exposure to heat and steam.
*  Other than to install the batteries, do not open the remote.
30° 30°