Mitsubishi Electric Mdt421s Users Manual

							English-20
1.  Pressing the Main Power Switch.
NOTE: 
When the Main Power Switch is used to power off the 
LCD monitor, the remote control and the power button will 
not  activate the on mode and both green and red power 
indicator turn off.  Be sure to turn the Main Power Switch 
to the on mode before using these two options.
2.  Pressing the power button.
NOTE: 
Before pressing the power button, be sure to turn on the 
Main Power button on the LCD monitor.
3.  Using the remote control.
NOTE: 
Before operating the remote control, be sure to turn on 
the Main Power Switch on the LCD monitor.
Power ON and OFF Modes
The LCD monitor power indicator will turn green while powered on or red in off mode. The monitor can be powered on or off 
using the following three options:
Basic Operation
EXIT MUTE INPUT
ON
OFF
Power indicator
 
						

							English
English-21
Power Indicator
Status
Power ON Green
Power OFF Red
Red On
Green Blinking
Power Standby Red, Green
Red Blinking
*
Power Standby when 
“SCHEDULE” is enable
Diagnosis
(Detecting failure)
See troubleshooting on 
page 38.
Using Power Management
The LCD monitor follows the VESA approved DPM Power
Management function.
The power management function is an energy saving
function that automatically reduces the power consumption
of the display when the keyboard or the mouse has not been
used for a fi xed period.
The power management feature on your new display has
been set to the “ON” mode. This allows your display to enter
a Power Saving Mode when no signal is applied. This could
potentially increase the life and decrease the power
consumption of the display.
Selecting a video source
To view a video source:
Use the input button to set [VIDEO].
Use the COLOR SYSTEM menu to set [AUTO], [NTSC],
[PAL], [SECAM], [PAL60], [4.43NTSC], according to your
video format.
Picture Size
FULL NORMAL DYNAMIC
CUSTOM REAL FULL NORMAL CUSTOM
REAL
Signal Type
NORMAL
DYNAMIC
FULL 4:3
SqueezeNORMAL SIZE Recommended Size
RGB 1, 2, 3, 4, 5, 6
DVD/HD, VIDEO,
VIDEO
NORMAL: Display the input signal aspect ratio from the PC 
signal, or display in 4:3 aspect ratio from the DVD/HD or 
VIDEO signal.
FULL: Display in entire screen.
DYNAMIC:  Expand 4:3 pictures to the entire screen with 
non-linearity. (Some round image will be cut by expansion.)
CUSTOM (ZOOM): Image can be expanded beyond the 
active display area. The image which is outside of active dis-
play area is not displayed.
REAL: Image will be displayed 1 by 1 pixel.
 
ZOOM
ZOOM
Picture Mode
Audio Source Switching
You can switch the audio source using the AUDIO INPUT 
button. 
Control Lock Mode
This function disables the operation buttons so that the ad-
justments you make are not changed when they are pressed. 
To disable the buttons, press and hold down the 
 and  
buttons together for at least 3 seconds.
To enable the buttons, press and hold down the 
 and  
buttons together for at least 3 seconds again.
HDMIAUDIO1 AUDIO2 AUDIO3
AUDIO1AUDIO2 AUDIO3 RGB 1, 2, 6
Other than 
RGB 1, 2, 6
HIGHBRIGHT
STANDARDsRGB
HIGHBRIGHTSTANDARD
CINEMARGB 1, 2, 3, 4, 5, 6
DVD/HD, VIDEO,
VIDE
O
 
						

							English-22
Information OSD
RGB1, 2, 3, 4, 5, 6
Video Input mode
Input signal Information
Audio input mode
Picture Size modeRGB3 
1024 x 768 
48kHz  60Hz
AUDIO : 1 
SIZE : FULL
)
DVD/HD
Video Input mode
Audio input mode
Picture Size modeDVD/HD
AUDIO : 3 
SIZE : FULL
VIDEO, VIDEO
Video Input mode
Input Signal Color System mode
Audio input mode
Picture Size mode
VIDEO
NTSC
AUDIO : 3
SIZE : NORMAL
PIP or POP
Main:RGB3
Sub:VIDEO
Main picture Information
Sub picture Information
Main picture Information
RGB3 
1024 x 768 
48kHz  60Hz
AUDIO : 1 
VIDEO 
NTSC 
SIZE : FULL
)
 
						

							English
English-23
OSD (On-Screen-Display) Controls 
Press MENU button to 
open Main menu.  Press 
UP or DOWN button to 
select sub-menu.
Press EXIT button to 
open Main menu.
Press UP or DOWN 
button to select 
sub-menu.After selecting the sub-menu 
using UP or DOWN button 
and pressing INPUT button to 
enter the selected sub-menu, 
make adjustment using PLUS 
or MINUS button. Press INPUT button 
to enter the selected 
sub-menu.Press EXIT button to go 
back to the previous 
menu screen. By pressing 
EXIT button at Main- 
Menu, Main-Menu 
disappears. Press UP or DOWN, and PLUS 
or MINUS button to select  
function, or control which you 
like.
Press SET button to decide.
Remote Control
Control Panel
OSD screenPress MENU or EXIT 
button to exit. Press SET button 
to decide.
 
						

							English-24
PICTURE
Main-Menu
BRIGHTNESS
Adjusts the overall image and background screen brightness.
Press + button to increase brightness.
Press - button to decrease brightness.
CONTRAST
Adjusts the image brightness in relation to the input signal.
Press + button to increase contrast.
Press - button to decrease contrast.
SHARPNESS
This function is digitally capable to keep crisp image at any timings.  
It is adjustable to get a distinct image or a soft one as you prefer and set independently for each picture mode.
Press + button to increase sharpness.
Press - button to decrease sharpness.
BLACK LEVEL
Adjusts the image brightness in relation to the background.
Press + button to increase black level.
Press - button to decrease black level.
NOTE: sRGB picture mode is standard and cannot be changed.
NOISE REDUCTION     * : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO, VIDEO only
Adjusts the noise reduction level.
Press + button to increase reduction level.
Press - button to decrease reduction level.
TINT     * : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO, VIDEO only
Adjust the tint of all color, or red, magenta, blue, cyan, green, and yellow individually. 
Press + button the flesh tone color becomes greenish.
Press - button the flesh tone color becomes purplish.
COLOR     * : INPUT RGB1 (HDMI INPUT MODE: HDMI-HD), RGB2 (DVI INPUT MODE: DVI-HD), DVD/HD, VIDEO, VIDEO only
Adjust the color saturation of all color, or of red, magenta, blue, cyan, green, and yellow individually.
Press + button to increase color depth.
Press - button to decrease color depth.
COLOR TEMPERATURE
Use to adjust the color temperature. 
The image becomes reddish as the color temperature decreases, and it becomes bluish as the color temperature increases. 
COLOR CONTROL
The color levels of red, green, and blue are adjusted by the color bars. 
R: Red, G: Green, B: Blue
GAMMA SELECTION
Selects a display gamma.
2.2, 2.4, OPTION, S gamma, Native
NOTE: sRGB picture mode is standard and cannot be changed.
Continued on next page.
 
						

							English
English-25
AUTO BRIGHTNESS
This function controls the screen brightness depending on the ambient light for easy viewing.
In addition, it changes the screen brightness depending on the ambient light and what are displayed on the screen to 
reduce power consumption as low as possible. 
[AUTO BRIGHTNESS]
LOCAL: The auto brightness function is enabled.
REMOTE: The auto brightness function is enabled. In addition, the monitor enters the intercommunication mode where 
multiple monitors are controlled collectively. (See page 33.)
OFF: This function is disabled.
[CONTROL]
PRIMARY: Select this setting to configure the monitor as Master when controlling multiple monitors collectively. 
SECONDARY: Select this setting to use the monitor alone or to configure the monitor as Slave when controlling multiple 
monitors collectively. 
[LIGHT FROM BACK]
YES: Select this setting when there is a light source such lighting equipment and a window behind the monitor.  
NO:   Select this setting when there is no light source such lighting equipment and a window behind the monitor. 
[BACK WALL]
Select the following settings according to the distance between the rear of the monitor and the wall or window. 
FAR: The distance is 5 meters or longer. 
NEAR: The distance is 5 meters or shorter.
[FRONT SENSOR] 
Select ON for normal use. 
OFF: Select this setting when the sensor on the front panel is shielded. 
[REAR SENSOR]
Select ON for normal use. 
OFF: Select this setting when the sensor on the rear panel is shielded.
[SATURATION]
ON: The image saturation is adjusted depending on the ambient light. 
OFF: Image saturation isnt adjusted.
[VIDEO DETECT]
ON: The screen brightness varies depending on what are displayed on the screen to reduce power consumption of the 
monitor. 
OFF: The screen brightness doesn’t vary and the power consumption isn’t reduced. 
PICTURE RESET
Selecting Picture reset allows you to reset all OSD settings about PICTURE setting.
Select “Yes” and press “SET” button to restore to factory preset data.
Press “EXIT” button to cancel and then return to the previous menu. Continued from previous page.
 
						

							English-26
OFF H FLIP V FLIP
Horizontally rotated Vertically rotated
SCREEN
Main-Menu
H POSITION
Controls Horizontal Image position within the display area of the LCD.
Press + button to move screen to right.
Press - button to move screen to left.
V POSITION
Controls Vertical Image position within the display area of the LCD.
Press + button to move screen to UP.
Press - button to move screen to DOWN.
CLOCK     * : INPUT RGB3, 4, 5 only
Press + button to expand the width of the image on the screen the right.
Press - button to narrow the width of the image on the screen the left.
CLOCK PHASE     * : INPUT RGB3, 4, 5 only
Improves focus, clarity and image stability by increasing or decreasing this setting.
ZOOM MODE
You can select “FULL”, “NORMAL” and “CUSTOM” and “REAL”. (INPUT RGB1, 2, 3, 4, 5, 6 only)  You can also select “FULL”, 
“NORMAL” “DYNAMIC” and “CUSTOM” and “REAL”. (INPUT DVD/HD, VIDEO, VIDEO only)
Selecting “DYNAMIC” will make the screen display panoramic with the expansion of the middle and outside of the screen 
changed. (The upper and the bottom of the image will be cut by expansion.)
Dynamic image is the same as FULL size image when HDTV signal is input.
Selecting “REAL” image will be displayed 1 by 1 pixel.
CUSTOM ZOOM
“CUSTOM ZOOM” will be selected when you select “CUSTOM” on the screen “ZOOM” mode.
ZOOM: expands the horizontal and the vertical size simultaneously.
HZOOM:  expands the horizontal size only.
VZOOM:   expands the vertical size only.
H POSITION: moves to the right with + button. moves to the left with – button.
V POSITION: moves up with + button. moves down with – button.
H RESOLUTION     * : INPUT RGB1, 2, 3, 4, 5, 6 only
Adjusts the horizontal size by increasing or decreasing the setting.
Press + button to expand the width of the image on the screen.
Press - button to narrow the width of the image on the screen.
V RESOLUTION     * : INPUT RGB1, 2, 3, 4, 5, 6 only
Adjusts the vertical size by increasing or decreasing the setting.
Press + button to expand the height of the image on the screen.
Press - button to narrow the height of the image on the screen.
ROTATION
The OSD screen is rotated. 
SCREEN RESET
Selecting Screen reset allows you to reset all OSD settings from PICTURE setting.
Select “Yes” and press “SET” button to restore the factory preset data.
Press “EXIT” button to cancel and then return to the previous menu.
 
						

							English
English-27
AUDIO
Main-Menu
PIP (PICTURE IN PICTURE)
Note: The “PIP” and “POP” modes do not function when the screen size is “CUSTOM” or “REAL”.
Main-Menu
BALANCE
Adjust the balance of L/R volume.
Press + button to move the stereo sound image to right.
Sound of the left side will be small.
Press - button to move the stereo sound image to left.
TREBLE
To accentuate or reduce the high frequency sound.
Press + button to increase TREBLE sound.
Press - button to decrease TREBLE sound.
BASS
To accentuate or reduce the low frequency sound.
Press + button to increase BASS sound.
Press - button to decrease BASS sound.
AUDIO RESET
Selecting Audio reset allows you to reset all OSD settings from AUDIO setting.
Select “YES” and press “SET” button to restore the factory preset.
Press “EXIT” button to cancel and then return to the previous menu.
PIP SIZE
Selecting the size of picture inserted at the “Picture-in-Picture” (PIP) mode.
“Large”, “Middle” and “Small” are available.
PIP AUDIO
Selecting the sound source in PIP mode.
When selecting “MAIN AUDIO”, you will get the sound for the main picture and when selecting “PIP AUDIO”, 
you will get the sound for the picture instead.
PIP RESET
Selecting PIP Reset allows you to reset all OSD settings from PIP setting.
Select “Yes” and press “SET” button to restore the factory preset data.
Press “EXIT” button to cancel and then return to the previous menu.
 
						

							English-28
CONFIGURATION 1
Main-Menu
AUTO SETUP     * : INPUT RGB3, 4, 5 only
Press “SET” button to automatically adjust screen size, horizontal position, vertical position, clock, clock phase, 
white level and black level.
Press “EXIT” button to cancel execution AUTO SETUP and then will return to the previous menu.
AUTO ADJUST     * : INPUT RGB3, 4, 5 only
Selecting the auto adjust ON/OFF.
Selecting ON when changing the timing, the horizontal position, vertical position and clock-phase will adjust automatically.
POWER SAVE
Selecting RGB “ON”, the monitor will go to power management mode when RGB1, 2, 3, 4, 5, 6 sync is lost.  
Selecting VIDEO “ON”, the monitor will go to power management mode after about 10 minutes delay from when DVD/HD, 
VIDEO and VIDEO input signal is lost.
LANGUAGE
OSD control menus are available in eight languages. 
(English, German, Spanish, French, Italian, Swedish, Chinese and Japanese)
SCREEN SAVER
Select “SCREEN SAVER” functions to reduce the risk of the “image persistence”.
GAMMA: The display gamma is changed and fixed when selected “ON”.
COOLING FAN: The built in cooling fan is always on when set “ON”. When “AUTO” is selected, the built-in cooling fan starts 
rotating automatically when the internal temperature exceeds the operation guarantee range. 
BRIGHTNESS: The brightness is decreased when selected “ON”.
MOTION: Image is slightly expanded and moves 4 directions (UP, DOWN, RIGHT, LEFT) periodically 
(Need setting the time for movement).
Movement area is approximately +/- 10mm from original position; 
Please locate the important information such as text within 90% area of screen image.
See “IMAGE PERSISTENCE” on page 32 for this function.
PIP and STILL will be disabled when “MOTION” is active.
COLOR SYSTEM     * : INPUT VIDEO, VIDEO only
Selecting the Color System depends on your input video format.
AUTO: NTSC, PAL, SECAM, PAL60 or 4.43 NTSC is automatically selected.
NTSC: Specific selection of NTSC.
PAL: Specific selection of PAL.
SECAM: Specific selection of SECAM.
PAL-60: Specific selection of PAL60.
4.43NTSC: Specific selection of 4.43 NTSC.
SIDE BORDER COLOR
Use to adjust the brightness of the black areas displayed on both sides of 4:3 image. 
OFF, 50, and 100 are selectable. 
CONFIGURATION RESET
Selecting the CONFIGURATION RESET allows you to reset all configuration settings.
Select “Yes” and press “SET” button to restore the factory preset data.
Press “EXIT” button to cancel and return the previous menu.
FACTORY RESET
Selecting “YES” allows you to reset PICTURE, SCREEN, AUDIO, CONFIGURATION1,2 and ADVANCED OPTION will be back 
to factory settings (except LANGUAGE, DATE AND TIME, HDMI INPUT MODE, DVI INPUT MODE, DDC/CI, MONITOR ID and 
SCHEDULE).  
Select “YES” and press “SET” button to restore the factory preset data.  Press “EXIT” button to cancel and return the 
previous menu.
 
						

							English
English-29
CONFIGURATION 2
Main-Menu
CAT5 CONTROL  * : Selectable only when the optional CAT5 Rx BOX is mounted. 
[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. 
[CAT5 EQ]
Make adjustment so that blur and smear of the displayed letters and graphic objects are minimized. 
[CAT5 R-GAIN, G-GAIN, B-GAIN]
When the displayed image is dark, increase each value. 
When whites arent displayed as intended, adjust the R-GAIN and B-GAIN values.
[CAT5 R-SKEW, G-SKEW, B-SKEW]
Adjust each value so that the color deviation in the displayed letters and graphic objects is minimized. 
SERIAL CONTROL * : Selectable only when the optional CAT5 Rx BOX is mounted. 
Select the communication interface (RS232 or RS485) for the serial communication function.
For connection of the signal cable, see page 35.
RS485 TERMINATION * : Selectable only when the optional CAT5 Rx BOX is mounted. 
Turn ON or OFF the termination resistance of the RS-485 interface.
ON: Select this setting to use the monitor alone or to configure the monitor as the one at the end of the connection when more 
than one monitor is multi-connected.
OFF: Select this setting to configure the monitor as other than the one at the end of the connection when more than one 
monitor is multi-connected. 
OSD TURN OFF
The OSD control menu will stay on as long as it is use.  In the OSD Turn Off submenu, you can select how long the monitor 
waits after the last touch of a button to shut off the OSD control menu. 
The preset choices are 5 -120 seconds.
INFORMATION OSD
Selects the information OSD display or not. 
The information OSD will display when input signal or source change or warning message like as no-signal or out-of range.
A time between 1 to 10 seconds is available.
OFF TIMER
To select OFF TIMER mode ON/OFF.
In the OFF TIMER menu, you can preset the monitor to automatically power down.
A time between 1 to 24 hours is available.
When the OFF TIMER is set, the SCHEDULE (see page 31) settings will be disabled.
OSD H POSITION
Adjusts the horizontal position of the OSD menu.
OSD V POSITION
Adjusts the vertical position of the OSD menu.
MONITOR INFORMATION
Indicates the model and serial number of your monitor.