Mitsubishi Electric Mdt421s Users Manual

							English-10
1. Determine the installation location
CAUTION:
DO NOT ATTEMPT TO INSTALL THE LCD MONITOR BY 
YOURSELF.
Installing your LCD display must be done by a qualifi ed tech-
nician. Contact your dealer for more information.
CAUTION:
MOVING OR INSTALLING THE LCD MONITOR MUST BE 
DONE BY TWO OR MORE PEOPLE.
Failure to follow this caution may result in injury if the LCD
monitor falls.
CAUTION:
Do not mount or operate the display upside down or face 
down.
CAUTION:
Do not install the LCD monitor where it will be exposed to 
direct sunlight, as this will result in display defects.
CAUTION:
This LCD has a temperature sensor and cooling fan. If the 
LCD becomes too hot, the cooling fan will turn on automati-
cally. If the LCD becomes overheated and the cooling fan 
is running, the “Caution” menu will appear. If the “Caution” 
menu appears, discontinue use and allow the unit to cool. 
When the LCD monitor is used in an enclosure or with protec-
tion on LCD surface, please check the inside temperature of 
monitor by “HEAT STATUS” (See page 31). The temperature is 
too hot than normal condition, please set “cooling fan” to ON 
on SCREEN SAVER function (See page 28).
IMPORTANT:
Lay the protective sheet, which was wrapped around the LCD 
monitor when it was packaged, beneath the LCD monitor so 
as not to scratch the panel.
2. Installing and removing the remote 
control batteries
The remote control is powered by 1.5V AAA batteries.  
To install or replace batteries:
How to install the batteries
1.  Unlock and pull up the cover in the arrow’s direction.
2.  Align the batteries according to the (+) and (–) indications 
inside the case.
3. Replace the cover.
How to remove the batteries
1.  Unlock and pull up the cover in the arrow’s direction.
2.  Remove the batteries.
CAUTION:
Incorrect use of batteries can result in leaks or bursting. 
Be careful especially about the following points.•  Place “AAA” batteries matching the + and - signs on each 
battery to the + and - signs of the battery compartment.
•  Do not mix battery types.
•  Do not combine new batteries with used ones.  It causes 
shorter battery life or leakage of batteries.
•  Remove dead batteries immediately to prevent battery 
liquid from leaking into the battery compartment. Dont 
touch exposed battery acid, it cause damage to your skin.
NOTE:
If you do not intend to use the Remote Control for a long 
period, remove the batteries.
3. Connect external equipment 
  (See pages 15-19)
•  To protect the connected equipment, turn off the main 
power before making connections.
•  Refer to your equipment user manual.
4. Connect the supplied power cord
•  The power outlet socket should be installed as near to the 
equipment as possible, and should be easily 
 accessible.
•  Fully insert the prongs into the power outlet socket. 
  Loose connection may cause noise.
NOTE:
Please refer to “Safety Precautions, Maintenance & 
Recommended Use” section of this manual for proper 
selection of AC power cord.
5. Switch on the power of all the 
  attached external equipment 
When connected with a computer, switch on the power of the 
computer fi rst.
Setup Procedure
Clamper
Use the clamper 
to secure the 
cable firmly.
 
						

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6. Operate the attached external equipment
Display the signal on the external equipment you wish.
7. Adjust the sound
Make adjustments lowering or rising the volume as required.
8. Adjust the screen (See pages 24-34)
Make adjustments to the display position or settings if re-
quired.
9. Adjust the image (See pages 24-34)
Make adjustments to brightness or contrast if required.
10. Recommended Adjustment
To reduce the risk of “image persistence”, please adjust 
the following items based on the application being used.
“POWER SAVE” (See page 28), “SCREEN SAVER” (See 
page 28), “SIDE BORDER COLOR”(See page 28), “DATE 
AND TIME” (See page 31), “SCHEDULE”(See page 31).
11. Installing and removing the stands
The stands are prepared as option.
Refer to the user’s manual of the stand for more information.How to install the stands
1.   Please turn monitor off.
2.   Fasten screws
 on both sides of the monitor.
NOTE:
Install the stands so that their longer portions come to the 
front.
How to remove the stands
1.   Spread the protective sheet on the fl at surface, such as a 
desk.
2.   Place monitor on the protective sheet.
3.   Remove screws with a screwdriver and place them in a 
safe place for reuse.
12. Connecting HDMI cable and Display 
Port cable
Stands 
(Longer portion
comes to the front.)
Screw holes for
MDT421S
Clamper
Use the clamper 
to secure the 
cable firmly.
 
						

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13. When MDT421S is installed in portrait 
position
Conditions
MDT421S can be installed in portrait position, under the fol-
lowing conditions:
Caution:
Portrait position is effective only when wall-mounted or 
ceiling-mounted.
The stands (legs) can not be fi tted to the monitor in portrait 
position.
Placing the monitor in portrait position, will shorten the aver-
age life of the LCD backlight.
Operational Environment (Temperature) shall be limited, as 
shown below:
   Operational
 Environment:
      Temperature  5 - 35 °C / 41 - 95 °F
      Humidity  20 - 80 % (without condensation)
Please orientate the monitor in the direction shown below:
Do not place monitor in landscape in any other manner.
Optional speakers (SP-421S) can not be attached when this 
LCD monitor is installed in portrait position.
How to set-up
The “
” logo should be on the LEFT side when 
facing the monitor.
MDT421S
MDT421S
90°
90°
Landscape
Counterclockwise Clockwise
14. For long-distance connection using 
the CAT5 Kit
NOTE:
The CAT5 Kit is an option designed for MDT421S. For the de-
tailed mounting procedure, see the user’s guide for the CAT5 
Kit (option). 
CAT5 video connection
The CAT5 video connection function is for transmitting the 
analog RGB video signal of the computer and the control 
signal of the monitor over a long distance using CAT5 cables. 
The computer can control the monitor via the optional CAT5 
Tx BOX and the CAT5 Rx BOX that is mounted on MDT421S. 
Caution:
Never connect network devices (such as a hub and a comput-
er for LAN) to the CAT5 IN and OUT connectors of the CAT5 
Kit. If they are connected, the network devices themselves, 
CAT5 Tx BOX, CAT5 Rx BOX, and monitor may be damaged. 
1.  Installation of the USB driver for CAT5 
serial communication control
To connect the computer and the CAT5 Tx BOX via USB inter-
face, it is necessary to install the USB driver to the computer 
from the CD-ROM supplied with the CAT5 Kit (option).
(When connecting the computer and the CAT5 Tx BOX via 
RS-232C interface, you don’t have to install the USB driver.) 
OS supported: Windows
® XP, Windows Vista® 
How to install:
1) Installation to Windows
® XP
Start the “PL2303-Driver_XP2K_v
******.exe” fi le in the 
Windows XP folder on the CD-ROM supplied with the CAT5 
Kit (option) and install the driver according to the instructions 
displayed on the screen. 
2) Installation to Windows Vista
®
Start the “PL2303_Prolifi c_Vista_******.exe” fi le in the 
Windows VISTA folder on the CD-ROM supplied with the 
CAT5 Kit (option) and install the driver according to the in-
structions displayed on the screen. 
2.  Connection of the CAT5 video connec-
tion function
There are two cases of connection. 
1) Connection to one monitor
Monitor with CAT5
Rx BOX (option) Computer
USB cable
CAT5 cable
VGA (mini D-SUB 15-pin) cable (supplied)CAT5 Tx BOX
(option)
 
						

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1.  Connect the USB connector of the supplied CAT5 Tx BOX 
and that of the computer using a commercially available 
USB cable. (When the USB driver isn’t available, connect 
an RS-232C cable in addition to the USB cable. In this 
case, the USB cable serves for supplying the power to the 
CAT5 Tx BOX.) See page 35.
2.  Connect the D-SUB input connector of the CAT5 Tx BOX 
and the VGA (D-SUB) output connector of the computer 
using the signal cable (mini D-SUB 15-pin cable) supplied 
with the monitor. 
3.  Connect the modular connector of the CAT5 Tx BOX and 
the CAT5 (RGB5) IN connector of the CAT5 Rx BOX using 
a commercially available CAT5 cable. 
2) Connection to multiple monitors
1.  In addition to the connection made step 1) above, con-
nect the CAT5 OUT connector of the fi rst monitor and the 
CAT5 (RGB5) IN connector of the second monitor using a 
commercially available CAT5 cable. 
2.  Connect the third and later monitors in the same way. 
  You can connect up to 5 monitors. 
Allowable cable length
Connection Max. cable length/signal timing
One monitor 150 m / 1920 x 1080 @60 Hz
Multiple moni-
tors200 m / 1920 x 1080 @60 Hz
(Total length of the connected cables)
The lengths given above are based on the actual measure-
ments using our standard signal source and the recommend-
ed cable as follows. Before installation, check the monitor 
operation in advance by connecting it with your computer and 
cables.
Recommended cable:
8-pin modular connector, straight-through, shielded, Category 
5 or 5e 
Commercially available cables that passed the compatibility 
test (Tested with shielded connectors commercially available.): 
7929A of Belden, NFTP-C5e-GY of Nex1
3.  Various settings involved in the CAT5 
video connection
In the case of the CAT5 video connection, confi gure the fol-
lowing settings displayed on the OSD screen. (See page 29.) 
1) CAT5 CABLE LENGTH
Select the cable length, and the defaults of all the adjustment 
values are automatically determined. 
Select the length that is closest to the actual length of your 
cable. 
2) CAT5 EQ
Make adjustment so that blur and smear of the displayed let-
ters and graphic objects are minimized. 
3) CAT5 R-GAIN/G-GAIN/B-GAIN
When the displayed image is dark, increase each value. 
When whites aren’t displayed as intended, adjust the R-GAIN 
and B-GAIN values.
4) CAT5 R-SKEW/G-SKEW/B-SKEW
Adjust each value so that the color deviation in the displayed 
letters and graphic objects is minimized. 
Computer
VGA (mini D-SUB 15-pin) 
cable (supplied)
CAT5 cable
Monitor with CAT5
Rx BOX (option)
Monitor supporting
Mitsubishi CAT5 CAT5 Tx BOX
(option)
USB cable
CAT5 cable
 
						

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3. Ventilation Requirements for enclosure 
mounting
To allow heat to disperse, leave space between surrounding 
objects as shown in the diagram below.
4. To avoid monitor from falling
When installing the monitor using the tabletop stands (op-
tional), take measures to prevent the monitor from falling over 
in case of an earthquake or other disaster to lessen the prob-
ability of injury and damage resulting from fall. 
As shown in the fi gure, secure the monitor to a solid wall or 
pillar using rope (commercially available) strong enough to 
bear the weight of the monitor. (MDT421S: approx. 27 kg (with 
the optional stands))
When you use screw hooks (commercially available), ring 
screw hooks, not C-shaped screw hooks (with opening), are 
recommended. 
Caution:
•  The effectiveness of preventing from falling substantially 
depends on the strength of brackets and base to which 
prevention device from falling is attached. When you 
  cannot ensure suffi cient strength, provide adequate 
 reinforcement. 
•  Though the recommended prevention from falling is 
intended to lessen the probability of injury and damage, it 
doesn’t assure its effectiveness against any kind of 
  earthquake or disaster. 
•  Do not sleep where the monitor may topple over or fall in 
case of an earthquake or other disaster. 
•  Before moving the monitor, remove the rope that is 
  securing the monitor. Failure to do so may result in injury 
or breakdown of the monitor.  You can attach mounting accessories to the LCD monitor in
one of the following two ways:
1. In the upright position
2. Lay the screen face down
Lay the protective sheet on a table, which was wrapped 
around the monitor when it was packaged, beneath the 
screen surface so as not to scratch the screen face.
This device cannot be used or installed without the Tabletop 
Stand or other mounting accessory. Failure to follow correct 
mounting procedures could result in damage to the equip-
ment or injury to the user or installer. Product warranty does 
not cover damage caused by improper installation.
Failure to follow these recommendations could result in void-
ing your warranty.
Use M6 screws (having a length 10 mm longer than the thick-
ness of the mounting bracket) and tighten them securely. 
Prevent the screws from loosening using spring washers, 
etc. MITSUBISHI ELECTRIC recommends using mounting 
interface that comply with TÜV-GS and/or UL1678 standard 
in North America.
Caution:
For preventing the monitor from falling.
•  Install the monitor with metal brackets for wall or ceiling 
installation (commercially available) on your own respon-
sibility. For detailed procedures of installation, refer to the 
instructions of the metal brackets. 
•  To lessen the probability of injury and damage resulting 
from fall of the monitor in case of earthquake or other 
disaster, be sure to consult the bracket manufacturer for 
installation location. 
•  To lessen the risk of falling of the monitor, thread commer-
cially available rope through the handles at the right and 
left of the monitor and secure the rope to the wall mount 
brackets or ceiling mount brackets. 
•  Do not sleep where the monitor may topple over or fall in 
case of an earthquake or other disaster. 
How to Mount and Attach Options to the LCD Monitor
Screw Holes400 mm
Screw hook, etc. 
commercially available
Clamper
ScrewRope, etc. 
commercially available
482.8 482.8
100 100 100 100
100 100
279.3 279.3
Table HandlesProtective sheet
(mm)
 
						

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Connections
Before making connections:
*  First turn off the power of all the attached equipment and make connections.
*  Refer to the user manual included with each separate piece of equipment.
Wiring Diagram
LCD monitor
VCR
(RCA)LCD monitor (second monitor)
Stereo amplifier Personal 
computer
(analog RGB)Personal 
computer
(DVI-D, DISPLAY PORT)DVD player
(HDMI)
External speaker
 
						

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Connecting a Personal Computer
By connecting your computer to your LCD monitor, you can display images on your computers screen.
Some video cards may not display an image correctly.
Connect the LCD Monitor to a Personal Computer
•  To connect the computer to the RGB 3 IN connector (mini D-sub 15 pin) on the LCD monitor, use the supplied RGB signal 
cable (mini D-sub 15 pin to mini D-sub 15 pin).
  Select “RGB 3” using the INPUT button on the LCD monitor or the D-SUB button on the remote control.
•  To connect the computer to the RGB 4 IN connector (BNC) on the LCD monitor, use a signal cable (mini D-sub 15 pin to 
BNC x 5).
  Select “RGB 4” using the INPUT button on the LCD monitor or the BNC button on the remote control.
•  For audio input, select AUDIO IN 1, 2, or 3 using the AUDIO INPUT button.
•  To connect a second LCD monitor, use the RGB OUT connector (mini D-sub 15 pin). (The RGB 3, RGB 4, or RGB 5 (option) 
signal selected by the fi rst LCD monitor is output.)
•  To output audio to the second LCD monitor, use the AUDIO OUT connector.
RCA
Mini D-sub 15 pin
BNC x 5LCD monitor
PC or IBM compatible
Mini D-sub 15 pin
LCD monitor (second monitor)
Mini D-sub 15 pin
RCA
Mini D-sub 15 pin
To RGB output
To audio output
 
						

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Connecting with Digital Interface Equipment
Connections can be made with equipment that is equipped with a digital interface compliant with the DVI (Digital Visual 
Interface) standard.
Connect the LCD Monitor to a Computer with a Digital Output
•  To connect the computer to the RGB 2 IN connector (DVI-D) on the LCD monitor, use a DVI-D cable.
  Select “RGB 2” using the INPUT button on the LCD monitor or the DVI-D button on the remote control.
  Set DVI INPUT MODE to “DVI-PC.”  (See page 31.) 
•  To connect the computer to the RGB 1 IN connector (HDMI) on the LCD monitor, use an HDMI cable.
  Select “RGB 1” using the INPUT button on the LCD monitor or the HDMI button on the remote control.
  Set HDMI INPUT MODE to “HDMI-PC.”  (See page 31.) 
•  To connect the computer to the RGB 6 IN connector (DISPLAY PORT) on the LCD monitor, use a Display Port cable.
  Select “RGB 6” using the INPUT button on the LCD monitor or the DISPLAY PORT button on the remote control.
•  For audio input, select AUDIO IN 1, 2, or 3 or HDMI using the AUDIO INPUT button. (HDMI is selectable only when the video 
input is “RGB 1.”)
•  The signals input from the RGB 1 (HDMI), RGB 2 (DVI-D) and RGB 6 (DISPLAY PORT) connectors aren’t output to the RGB 
OUT connector.
LCD monitor
PC or IBM compatible
PC or IBM compatible PC or IBM compatible
DVI-DDVI-D
DISPLAY
PORT
DISPLAY PORT HDMI
HDMI
To RGB output
To RGB outputTo RGB output
To audio output
To audio outputTo audio output
 
						

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Connecting a DVD Player with component output / HDMI output / DVI output
You can connect DVD players equipped with a component output, HDMI output, and DVI output to your LCD monitor. 
Refer to your DVD player owner’s manual for more information.
Connect the LCD Monitor to a DVD Player
•   To connect a DVD player equipped with a component output to the DVD/HD IN connector (BNC) on the LCD monitor, you 
may need a BNC connector cable (BNC to RCA adaptor).
  Select “DVD/HD” using the INPUT button on the LCD monitor or the YPbPr button on the remote control. 
•  To connect a DVD player equipped with an HDMI output to the RGB 1 IN connector (HDMI) on the LCD monitor, use an 
HDMI cable. 
  Select “RGB 1” using the INPUT button on the LCD monitor or the HDMI button on the remote control. 
  Set HDMI INPUT MODE to “HDMI-HD.”  (See page 31.) 
•  For audio input, select AUDIO IN 1, 2, 3 or HDMI using the AUDIO INPUT button. (HDMI is selectable only when the video 
input is “RGB 1.”) 
HDMI BNC x 3LCD monitor
DVD Player
HDMI
BNC-RCA
adapter BNC x 3
RCA
To HDMI output DVD Player
To video output
To audio output
LTo audio output
R
RCA
NOTE:
Operations of the connected HDMI device aren’t always guaranteed. 
 
						

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Connecting to a VCR / Stereo Amplifi er
You can connect your VCR / stereo amplifi er to your LCD monitor. Refer to your VCR / stereo amplifi er owners manual for more 
information.
Connect the LCD Monitor to a VCR / Stereo Amplifi er
•  To connect the VCR to the VIDEO IN connector (RCA, BNC, or S-VIDEO) on the LCD monitor, use a video cable or S-video 
cable.
  For connection to the AUDIO IN connector on the LCD monitor, use an RCA cable (audio cable).
  Connect the connectors of the RCA cable (audio cable) properly. 
  When connecting the VCR to the RCA or BNC connector, select “VIDEO” using the INPUT button on the LCD monitor or the 
VIDEO button on the remote control. 
  When connecting the VCR to the S-VIDEO connector, select “VIDEO” using the INPUT button on the LCD monitor or the 
VIDEO button on the remote control.
•  Before connecting a stereo amplifi er to the LCD monitor, be sure to turn off the stereo amplifi er. 
  For connection to the AUDIO OUT connector on the LCD monitor, use an RCA cable (audio cable). 
  Connect the connectors of the RCA cable (audio cable) properly. 
  Turn on the LCD monitor fi rst, and then turn on the stereo amplifi er. 
•  The audio input signal selected by the LCD monitor is output from the AUDIO OUT connector. 
NOTE:
For video signal input, use either of the RCA or BNC connector. 
LCD monitor
VCR
To video output
To audio output
LTo audio output
R
To audio input
LTo audio input
R
RCA
LCD monitor (second monitor) RCARCA RCA
BNC
BNC
Stereo amplifier RCA
RCA
External
speaker