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How to Convert old CNC CRT monitor to LCD Monitor

MS084R43CNCU(9"CRT Replacement), MS104R43CNCU(12"CRT Replacement) and MS121R43CNCU (14" CRT Replacement) are universal replacement for replacing old CRT CNC monitors. They support all format of old CNC CRT monitor from MDA (Mono chrome, 18.4Khz), CGA(15.8Khz), EGA(21.8Khz), VGA(31.5Khz and SVGA(35.2Khz). They had upgraded to our UB54 sunlight readable LED kit. It will last 10 times longer than CCFL backlight. It comes with all parts that you need to upgrade from old CRT to LCD, the only thing you need to do is to determining where the signals go on the mating connector (DB9-F) of your old CRT. We can also help you to identify them if you email us few images about your old CRT wire harness ( Easy to install, anyone can do it! It comes with 1 year warranty.

Identifying your old CRT wire harness signal pin out
There are many different type of connector were used on old CNC CRT monitor. With limited equipments and technical skills, the easiest way to identify the pin out would be going by color coded wire as show on above photo. We can also help you to identify them if you email us few images about your old CRT wire harness(
Connecting wires to DB9-Male Cable
All our universal kits come with one color coded DB9-male with wires, one DB9 female and one DB9 male connectors.
MDA connections: (Monochrome Display Adapter)
Name Wire Color Description
A Silver Connect to DB9 Metal Shield
B=Pin1 Black Connect to Ground
C=Pin9 Wite Connect to Vertical Sync
D=Pin8 Orange Connecto to Horizontal Sync
E Blue No Connection
F Green No Connection
G Red No Connection
H=Pin7 Brown Connection to Video in
CGA/EGA/VGA/SVGA Connections:
Name Wire Color Description
A Silver Connect to DB9 Metal Shield
B=Pin1 Black Connect to Ground
C=Pin9 White Connect to Vertical Sync
D=Pin8 Orange Connect to Horizontal Sync
E=Pin5 Blue Connect to Blue (B)
F=Pin4 Green Connect to Green (G)
G=Pin3 Red Connect to Red (R)
H Brown No Connection
OSD Menu and Input Connector
Button Description
1 Power input, DC12V, ≥2A
2 Press it once it to move the cursor up/down, 
3 Press it once to bring up OSD Menu. Press it again to select and press it once to exit Menu
4 Not Use (Invalid interface)
5 DB9 connector. To be connected to input
Configuration the setting and Troubleshooting
Step 1:
Selecting a correct input source as follow:
Press MENU once, to bring up OSD Menu
Then Press - or + go to “Style”
Press MENU once, Style text will change to Red
Press + or – to select correct input
Press MENU to save it
Step 2: Changing resolution:
Press MENU once
Press - or+ go to Resolution
Press MENU, Resolution Text will change to Red
Press - or + select 640X480 Press MENU once, Press - or + go to EXIT&Save Press MENU to save it
Step 3: Adjust the image to fit LCD screen
Press MENU to bring up OSD Menu
Press - or + to select such as H-Position, V-Position, Width, and height adjustment.
Step 4: Save and Exit: Save all the parameters and exit the menu.

Note 1: If the screen shows elongated, and the overflow to the bottom of the screen, change scanning to Progressive Scan; if the adjustment of the vertical position to a maximum, the image display is still only half of the display, then change scanning mode to: interlaced scan (Interlaced).
Note 2 input impedance; select the input source impedance than with select 750 in Europe, relatively light, if you choose all 750 European white side, you should choose for the 75 euro.
Note 3: the phase adjustment, if the image appears small waves up and down type jitter, can adjust the consistency with the input signal phase.

Definition of 9 pin DB9 Input connectors (Solder Side, for CGA/EGA/VGA/SVGA)
Pin Description
P1 Ground
P2 Ground
P3 Red signal
P4 Green Signal
P5 Blue Signal
P6 No Connection
P7 No Connection
P8 Horizontal Sync
P9 Vertical Sync
Instruction Download
Instruction for MS084R43CNCU, MS104R43CNCU and MS121R43CNCU
Instruction for MS084R43CNC+MS582EXT, MS104R43CNC+MS582XET and MS121R43CNC+MS582EXT

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