Mitsubishi Electric Ldt422v Users Manual

							English-30
To RS-232C 
connector IN
RS-232C cable RS-232C cable PCTo RS-232C 
connector INTo RS-232C 
connector OUT
 U-10  Remote control  Carry out as necessary
RS-232C Remote control
By connecting multiple LCD monitors and a computer using RS-232C cables (commercially available), you can control the monitors 
from the computer for the following operations:
•  Power ON or OFF
•  Switching input signals
Connection
LCD monitor + PC
•  Before making connections, turn off the personal computer and the monitors. 
•  Start the personal computer fi rst, and then turn on the monitors. (Otherwise, the com port may be unusable.)
NOTE:
For connection with a 25-pin serial port connector on the computer, a conversion adapter is required.
Contact your dealer for details.
1) I n te r f a c e
PROTOCOL RS-232C
BAUD RATE 9600 [bps]
DATA LENGTH 8 [bit]
PA R I T Y B I T N O N E
STOP BIT 1 [bit]
FLOW CONTROL NONE
  This LCD monitor uses RXD, TXD and GND lines for RS-232C control.
  Use RS-232C cables of reverse type (commercially available).
2)  Control command diagram
  The command is structured by the address code, function code, data code and end code. The length of the command is 
different for each function.
NOTE:
The example below shows basic commands used for the confi guration consisting of one computer and one monitor (one-to-one 
connection). For the commands for connecting multiple monitors, contact your dealer.
Address code Function code Data code End code
HEX 30h 30h Function Data 0Dh
ASCII ‘0’ ‘0’ Function Data
    [Address code]  30h 30h (ASCII code, ‘0’ ‘0’), fi xed.
    [Function code]  Code unique to each control function.
    [Data code]  Data unique to each control function (Not always indicated by numerical values.)
    [End code]  0Dh (In ASCII code, ‘
’) fi xed.
 
						

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English
3) Control sequence
(1)  A command is sent from the computer to the monitor. (Commands should be sent at intervals of at least 600 ms.)
(2)  The monitor sends a return command within 600 ms* after receiving and encoding the command. If the monitor fails to 
receive the command, it doesn’t send any return command.
(3)  The computer checks the return command to see that the command it sent was executed or not.
(4)  The monitor sends various codes other than the return code. While RS-232C control sequence is in progress, reject other 
codes on the personal computer side.
*: Transmission of the return command may be delayed during signal switchover, etc.
Example: Turn the power ON (‘  ’ is for ASCII code)
Command from computer Command from monitor Detail of command
30 30 21 0D
‘0’ ‘0’ ‘!’ ‘
’Command for POWER ON
30 30 21 0D
‘0’ ‘0’ ‘!’ ‘
’Command received
(Command echoed back)
4) Operation commands
  The operation commands confi gure the basic operation settings of this LCD monitor. The commands may not work during signal 
switchover.
  The operation commands have no data codes.
Operation ASCII HEX Operation ASCII HEX
POWER ON ! 21h INPUT DVD/HD _v2 5Fh  76h  32h
POWER OFF " 22h INPUT S-VIDEO _v3 5Fh  76h  33h
INPUT RGB 1 _r1 5Fh  72h  31h VOLUME UP r06 72h  30h  36h
INPUT RGB 2 _r2 5Fh  72h  32h VOLUME DOWN r07 72h  30h  37h
INPUT RGB 3 _r3 5Fh  72h  33h MUTE ra6 72h  61h  36h
INPUT RGB 4 _r4 5Fh  72h  34h AUTO SETUP r09 72h  30h  39h
INPUT VIDEO _v1 5Fh  76h  31h
•  After sending the POWER ON or POWER OFF command, wait for at least 1 minute to send the next command. 
•  After sending any of the video input selection commands, wait for at least 10 seconds to send the next command.
5) Read command
  The computer sends the command without datacode to the monitor.
  After receiving this command, the monitor returns the command with datacode including the current status to the computer. 
  Example: When the computer asks the power status of the monitor, and the status of the monitor is powered-on.
Command from computer Command from monitor Detail of command
30 30 76 50 0D   ‘0’‘0’‘v’‘P’[enter] Ask about the power status of the monitor.
30 30 76 50 31 0D   ‘0’‘0’‘v’‘P’‘1’[enter] Monitor is powered-on.
Structure of the Read-command
ASCII HEX
Function Data (Receive) Function Data (Receive)
POWERON vP 1 76 50 31
OFF (stand by) vP 0 76 50 30
InputRGB-1 (HDMI) vI r1 76 49 72 31
RGB-2 (DVI-D) vI r2 76 49 72 32
RGB-3 (D-SUB) vI r3 76 49 72 33
RGB-4 (BNC) vI r4 76 49 72 34
Video vI v1 76 49 76 31
DVD/HD vI v2 76 49 76 32
S-VIDEO vI v3 76 49 76 33
Internal 
temperatureAround the main 
boardResolution
1˚Ctc1 (ex.) +25 74 63 31 2B 20 32 35
Around the power 
supplyResolution
1˚Ctc2 (ex.) +31 74 63 32 2B 20 33 31
 U-10  Remote control (continued)  Carry out as necessary 
 
						

							English-32
Adjustment status
The values adjusted by the wireless remote control and the 
PLUS and MINUS buttons on the monitor are displayed. Sub menu (Adjustment items)
Adjustment items are displayed.
Operation buttons (Key guide) 
Buttons for controlling the displayed OSD menu are displayed.
PICTURE
SCREEN
AUDIO
PIPCONFIGURATION1
CONFIGURATION2
CONFIGURATION3
ADVANCED OPTION Main menu
Icons other than the one you selected are grayed out.
Sub menu screen 
When you select a sub menu, an OSD screen is displayed. 
Sub menus contain information screens, adjustment menu screens, and selection menu screens as shown below.
Sub menu screen: Picture reset (for example)
 Page 34
 Page 35
 Page 36
 Page 37 Page 38
 Page 39
 Page 40
 Page 41
Confi guration of OSD screen
This monitor is equipped with the OSD (On Screen Display) function for easy screen adjustment. The OSD function allows you to 
control the menus displayed on the screen for brightness setting and other settings. 
The OSD screen is confi gured as shown below.
Main Menu Screen
Confi guration and basic operation of OSD screen
 
						

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English
Basic operation of OSD
When the MENU button on the wireless remote control or the EXIT button on the monitor is pressed, the OSD screen is displayed.
Select a main menu by pressing the 
 or  button.
Accept the selected main menu 
by pressing the SET button.Select a main menu by 
pressing the INPUT button.INPUT button
  button
INPUT button
INPUT button
  button Select a sub menu by pressing 
the 
 or  button.Select a sub menu by pressing 
the  or  button.
Accept the selected sub menu 
by pressing the SET button.Accept the selected sub menu 
by pressing the INPUT button.
Select the setting value by 
pressing the 
 or  button 
and then press the SET button 
to accept the setting.Select the setting value by 
pressing the  or  button and 
then press the INPUT button to 
accept the setting.
The OSD screen disappears when you press the MENU button on the wireless remote control once or the EXIT button on the 
monitor three times.Wireless remote control Monitor button OSD screen
Confi guration and basic operation of OSD screen (continued)
     
						

							English-34
OSD screen functions
PICTURE
 BRIGHTNESS
You can adjust the brightness. 
Press the PLUS (+) button to increase the brightness. Press 
the MINUS (-) button to decrease the brightness.
 CONTRAST
You can adjust the contrast. 
Press the PLUS (+) button to brighten dark areas in the image. 
Press the MINUS (-) button to darken bright areas in the image.
 SHARPNESS
You can adjust the sharpness. 
Press the PLUS (+) button to make the image look sharper. 
Press the MINUS (-) button to make the image look softer.
NOTE : If you increase the sharpness setting value too 
much, lines may appear double. In such a case, 
decrease the sharpness setting value.
 BLACK LEVEL
You can adjust the brightness at the blackest point in the image. 
Press the PLUS (+) button to brighten dark areas in the 
image. Press the MINUS (-) button to darken bright areas in 
the image.
NOTE : This adjustment doesn’t work in the sRGB picture 
mode.
 TINT
* For the RGB1, DVD/HD, VIDEO, and VIDEO inputs 
only.
When you select TINT by pressing the SET button on the 
wireless remote control, the TINT screen appears and you 
can adjust the following.
[TINT]:
You can adjust all the colors at the same time. Press the 
PLUS (+) button to add a green tint. Press the MINUS (-) 
button to add a purple tint. 
[RED], [MAGENTA], [BLUE], [CYAN], [GREEN], or [YELLOW]:
You can adjust each color individually. Press the PLUS (+) 
button to shift the selected color to the right around the 
color circle. Press the MINUS (-) button to shift the selected 
color to the left around the color circle.
 COLOR
* For the RGB1, DVD/HD, VIDEO, and VIDEO inputs 
only.
When you select COLOR by pressing the SET button on the 
wireless remote control, the COLOR screen appears and 
you can adjust the following.
[COLOR]:
You can adjust all the colors at the same time. Press the 
PLUS (+) button to deepen the colors. Press the MINUS (-) 
button to lighten the colors.
[RED], [MAGENTA], [BLUE], [CYAN], [GREEN], or [YELLOW]:
You can adjust each color individually. Press the PLUS (+) 
button to deepen the selected color. Press the MINUS (-) 
button to lighten the selected color.
NOTE : This adjustment doesn’t work in the sRGB picture 
mode.
 COLOR TEMPERATURE
You can adjust the color temperature.
The image becomes reddish as the color temperature 
decreases, and it becomes bluish as the color temperature 
increases.
NOTE : This adjustment doesn’t work in the sRGB picture 
mode.
 GAMMA SELECTION
You can select the gamma mode from NATIVE, S GAMMA, 
2.2, 2.4 and OPTION.
NOTE : GAMMA is fi xed to 2.2 in the sRGB picture mode.
 NOISE REDUCTION
* For the VIDEO and VIDEO inputs only.
You can adjust the noise reduction level. 
Press the PLUS (+) button to increase the value to lessen 
the noise.
 FILM MODE
You can select the fi lm mode function.
AUTO:  Images of 24 frames per second are automatically 
detected and displayed.
OFF:  Images of 24 frames per second are not 
automatically detected.
NOTE : When FILM MODE is AUTO, set SCAN 
CONVERSION to PROGRESSIVE. See page 41.
 PICTURE RESET
You can reset all the PICTURE settings to the factory 
defaults. RED MAGENTA
GREEN
Color circleCYAN YELLOW BLUE
  
						

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English
OSD screen functions (continued)
SCREEN
 AUTO SETUP
* For the RGB3 and RGB4 inputs only.
Press the SET button to automatically adjust the screen 
size, horizontal position, vertical position, clock, clock 
phase, white level, and black level.
 AUTO ADJUST
* For the RGB3 and RGB4 inputs only.
When AUTO ADJUST is ON, the horizontal position, vertical 
position, and clock phase are automatically adjusted at the 
time of the timing switching.
 H POSITION
You can adjust the horizontal image position.
Press the PLUS (+) button to move the image to the right. 
Press the MINUS (-) button to move the image to the left.
 V POSITION
You can adjust the vertical image position.
Press the PLUS (+) button to move the image up. Press the 
MINUS (-) button to move the image down.
 CLOCK
* For the RGB3 and RGB4 inputs only.
You can adjust the image size of the computer and eliminate 
blurred letters. 
Press the PLUS (+) button to expand the width of the image 
on the screen to the right. Press the MINUS (-) button to 
narrow the width of the image on the screen to the left.
 CLOCK PHASE
* For the RGB3 and RGB4 inputs only.
You can adjust the level of the periodic variation of the 
screen fl icker.
 ZOOM MODE
You can select the mode to stretch the image to fi t it to the 
screen.
For the RGB1, RGB2, RGB3, and RGB4 inputs, you can 
select FULL, NORMAL, CUSTOM, or REAL. 
For DVD/HD, VIDEO, and VIDEO, you can select FULL, 
NORMAL, DYNAMIC, CUSTOM, or REAL. 
FULL:  The image is stretched to fi ll the screen 
regardless of its aspect ratio. 
NORMAL:  The image is stretched vertically to the full 
height of the screen while keeping the aspect 
ratio. 
DYNAMIC:  The image is stretched to fi ll the screen with 
different magnifi cations at the screen center 
and the screen edges.
CUSTOM:  You can stretch the image horizontally and 
vertically as you desire using the CUSTOM 
ZOOM setting. REAL:  The image is displayed without being stretched 
or reduced.
NOTE : In the DYNAMIC mode, the top and the bottom of 
the image may be cropped. Full HD images are 
displayed as in the FULL mode.
 CUSTOM ZOOM
CUSTOM ZOOM becomes selectable when you set ZOOM 
MODE to CUSTOM.
ZOOM:  You can expand the horizontal and vertical 
sizes simultaneously.
H ZOOM:  You can expand the horizontal size only.
V ZOOM:  You can expand the vertical size only.
H POSITION:  Pressing the PLUS (+) button moves the 
image to the right. Pressing the MINUS (-) 
button moves the image to the left.
V POSITION:  Pressing the PLUS (+) button moves the 
image up. Pressing the MINUS (-) button 
moves the image down.
 H RESOLUTION
* For the RGB3 and RGB4 inputs only.
Use this setting when AUTO SETUP and AUTO ADJUST 
cannot obtain the horizontal resolution of the image 
supplied from an external device. 
Press the PLUS (+) button to increase the resolution of the 
input. Press the MINUS (-) button to decrease the resolution 
of the input.
 V RESOLUTION
* For the RGB3 and RGB4 inputs only.
Use this setting when AUTO SETUP and AUTO ADJUST 
cannot obtain the vertical resolution of the image supplied 
from an external device. 
Press the PLUS (+) button to increase the resolution. (The 
displayed image will shrink vertically.) Press the MINUS (-) 
button to decrease the resolution. (The displayed image will 
expand vertically.)
 INPUT RESOLUTION
* For the RGB3 and RGB4 inputs only.
You can select the following resolutions according to 
the input signal: AUTO, 1024x768, 1280x768, 1360x768, 
1400x1050, 1680x1050, 1600x1200, and 1920x1200. AUTO 
selects the resolution automatically.
The setting you select becomes effective when POWER is 
turned OFF and ON again.
 SCREEN RESET
You can reset all the SCREEN settings to the factory 
defaults.
  
						

							English-36
OSD screen functions (continued)
AUDIO
 BALANCE
You can adjust the balance of the right and left volumes. 
Press the PLUS (+) button to decrease the left volume. 
Press the MINUS (-) button to decrease the right volume.
 TREBLE
You can adjust the high frequency sound. 
Press the PLUS (+) button to increase the treble sound. 
Press the MINUS (-) button to decrease the treble sound.
 BASS
You can adjust the low frequency sound. 
Press the PLUS (+) button to increase the bass sound. 
Press the MINUS (-) button to decrease the bass sound.
 AUDIO RESET
You can reset all the AUDIO settings to the factory defaults.
  
						

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English
OSD screen functions (continued)
PIP (PICTURE IN PICTURE)
 PIP MODE
You can select the PIP mode from PIP, POP, SBS ASPECT, 
SBS FULL, and OFF using the PLUS (+) and MINUS (-) 
buttons. See page 43.
* SBS: SIDE BY SIDE
 PIP SIZE
You can select the size of the sub picture displayed in the 
PIP mode. 
You can move the sub picture by pressing the UP (
), 
DOWN (
), PLUS (+), and MINUS (-) buttons.
 PIP AUDIO
You can select the audio output in the PIP mode. 
When MAIN is selected, audio of the main picture is output. 
When SUB is selected, audio of the sub picture is output.
  PIP H POSITION
You can adjust the horizontal position of the sub screen.
Press the PLUS (+) button to move the sub screen to the 
right. Press the MINUS (-) button to move the sub screen to 
the left.
  PIP V POSITION
You can adjust the vertical position of the sub screen.
Press the PLUS (+) button to move the sub screen up. Press 
the MINUS (-) button to move the sub screen down.
 SUB INPUT
You can select the video input for the sub screen from 
HDMI (RGB1), DVI-D (RGB2), D-SUB (RGB3), RGB4, DVD/
HD, VIDEO, and VIDEO.
 PIP RESET
You can reset all the PIP settings to the factory defaults.
PIP
POP
SBS ASPECT
SBS FULL
OFF NOTE:
The PIP and POP functions don’t work in the CUSTOM and 
REAL picture size modes.
Refer to “PIP, POP function” for details. (See page 43.)
  
						

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OSD screen functions (continued)
CONFIGURATION1
 OFF TIMER
You can select the OFF TIMER mode. 
Select the time period to automatically turn off the power 
from 1 to 24 hours.
NOTE : When OFF TIMER is enabled, the SCHEDULE 
settings (see page 29) will be disabled.
 SCHEDULE
You can program the LCD monitor operation schedules. (See 
page 29.)
< HOW TO SETUP SCHEDULE >
Using the “SCHEDULE” function allows you to set up to 
seven different scheduled time intervals when the LCD 
Monitor will be activated.
You can select the time the monitor turns on and turns off, 
the day of week the monitor is activated, and which input 
source the monitor will use for each scheduled activation 
period. A check mark in the box next to the number of the 
schedule indicates that the selected schedule is in effect.
To select which schedule to set, use the up/down arrows to 
move the number (1 to 7) of the schedule.
Use the (+) and (-) buttons to move the cursor horizontally 
within the particular schedule. Use the 
 and  buttons 
to increase the time and select the input port. The “SET” 
button is used to make a selection.
If you create a schedule but do not want to set the power 
on time, select “--” in the “ON” time slot.
If you do not want to use a power off time select “--” in the 
“OFF” time slot.
If there is no input selected (“--” showing in the input spot) 
the input from the previous schedule will be used.
The selection of EVERY DAY within a schedule takes priority 
over other schedules that are set up to operate weekly.
When schedules are overlapping, scheduled Power ON time 
has priority over scheduled Power OFF time.
If there are two schedules programmed for the same time, 
then the highest numbered schedule has priority.
When OFF TIMER is enabled, the “SCHEDULE” settings are  
disabled.
  DATE AND TIME
You can adjust the current date and time for the internal 
clock. 
You must set this item when using SCHEDULE. 
After competing the setting, be sure to press the SET 
button (button 
5 on page 10).
 CONFIGURATION1 RESET
You can reset all the CONFIGURATION1 settings to the 
factory defaults.
Note that you cannot reset the setting of DATE AND TIME.
  
						

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English
OSD screen functions (continued)
CONFIGURATION2
 LANGUAGE
OSD control menus are available in eight languages. 
(English, German, Spanish, French, Italian, Swedish, 
Chinese, and Japanese)
  OSD TURN OFF
The OSD control menu will stay on as long as it is used.
The preset choices are 5 -120 seconds.
  OSD H POSITION
You can adjust the horizontal position of the OSD menu.
  OSD V POSITION
You can adjust the vertical position of the OSD menu.
 INFORMATION OSD
You can enable and disable the information OSD display. 
The display time is selectable from 1 to 10 seconds.
NOTE : The information OSD display shows a message 
when the input source is switched, the input signal 
state is changed, or the input signal has an error.
 MONITOR INFORMATION
The model name and the serial number of your monitor are 
displayed.
 MONITOR ID
ID numbers for wireless remote control are assigned to 
LDT422V monitors that are multi-connected via RS-232C.
ID numbers 1 to 26 are selectable.
 IR CONTROL
You can lock the wireless remote control. 
Select from the following two modes using the 
 and  
buttons and then determine the selected mode by pressing 
the SET button.
NORMAL:  All the remote control operations are 
enabled.
LOCK:  All the remote control operations are 
disabled.
NOTE: When you hold down the DISPL AY button on the 
wireless remote control for at least 5 seconds, the 
NORMAL mode is activated. 
  You can lock the wireless remote control 
independently from the control buttons on the 
bottom of the monitor. See page 42.
 TILING
You can enlarge an image across multiple screens. 
A single large screen can be confi gured with up to 25 
monitors. You can also divide the displayed image into up 
to 5 pieces horizontally and vertically.NOTE : It is required to connect the same video signal to 
each monitor via a distributor or RGB OUT. 
  When TILING is activated, PIP, POP, SBS, and STILL 
are disabled.
  TILING doesn’t work in the REAL picture size mode.
H MONITORS:  Select the number of images obtained by 
horizontal division.
V MONITORS:  Select the number of images obtained by 
vertical division.
POSITION:  Select the area you want to enlarge.
FRAME COMP.:  When displaying an image across multiple 
monitors, you can select the mode to 
compensate for the bezel widths for 
smooth and natural display.
ENABLE:  When you select ON, the image in the 
selected area is enlarged on the screen.
  POWER ON DELAY
You can select the delayed time until the power-on mode 
is activated after the power is turned on manually or 
automatically. This setting is useful in hiding start-up 
messages and powering on the connected devices at 
different timings.
The time is selectable from OFF and 2, 4, 6, 8, 10, 20, 30, 
40, and 50 seconds.
 CLOSED CAPTION
You can select to display or hide captions.
OFF:  Captions are hidden.
CC1:  Captions are displayed in sync with the 
primary audio.
CC2:  Information (related to the primary 
audio) is displayed without sync.
CC3:  Captions are displayed in sync with the 
secondary audio.
CC4:  Information (related to the secondary 
audio) is displayed without sync.
TT1/ TT2/ TT3/ TT4:  Four types of information not related to 
the displayed images are displayed. (For 
example, news and weather forecast.)
NOTE : Check with each supplier of your video software 
and external video devices in advance whether they 
are compliant with EIA-608-A. 
  If their video signals are not compliant with it, 
images may not be displayed correctly.
 CONFIGURATION2 RESET
You can reset all the CONFIGURATION2 settings to the 
factory defaults.