Mitsubishi Electric MDT421S: Setup Procedure

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 quali

fi

 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. Don't 

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.

English

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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_Proli

fi

 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)

English

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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-

tors

200 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, con

fi

 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