12V LCD controller

[bradpitt4u2day]

I have a 12V LCD controller. I want to provide power from my computer power supply molex connector. Can I simply solder the 12v (yellow wire) to the lcd controller. I can not find the ground on the LCD controller but I believe it is grounded when screwed to the chassis. All help greatly appreciated.

 

[ericgibbs]

I have a 12V LCD controller. I want to provide power from my computer power supply molex connector. Can I simply solder the 12v (yellow wire) to the lcd controller. I can not find the ground on the LCD controller but I believe it is grounded when screwed to the chassis. All help greatly appreciated.

hi brad,
In my PC I use the 'old' floppy disc power connector to power external projects, its a 4 pole Molex type connector, it has two 0V pins and +5V and +12V pins.

Do you have a part number or diagram of the controller, relying on a chassis for 0V is not the best way to go.

E.

 

[bradpitt4u2day]

Here are some images




I want to solder the yellow molex to where the red wire is. I have no idea where to put the black ground wire.

 

[ericgibbs]

hi,
Is the black connector, bottom left hand corner of the PCB a 2pin power input connector.

If yes, it should have a 0V pin.??

 

[ericgibbs]

I want to solder the yellow molex to where the red wire is. I have no idea where to put the black ground wire.

Looking at your images the RED wire is connected to the 0V ground plane of the PCB.!!!

Look at the Molex connector , white, on the left side of your PCB image, that appears to have the input power rails, thats connected to a switched mode power supply.

 

[bradpitt4u2day]

hi,
Is the black connector, bottom left hand corner of the PCB a 2pin power input connector.

If yes, it should have a 0V pin.??

Yes it is

 

[bradpitt4u2day]

Looking at your images the RED wire is connected to the 0V ground plane of the PCB.!!!

Look at the Molex connector , white, on the left side of your PCB image, that appears to have the input power rails, thats connected to a switched mode power supply.

I did not do that this is how it came.

That molex connector powers a inverter for lcd.