Thread: Power to lcd?

From having seen alot of laptops inverter theres normally 2 connectors on the inverter board. Usually theres the HV and the controls connector, the HV goes directly to the screen backlight.

Some uses 5 or 6 wires. 2 of the wires is obviously the supply voltage. If you are really stuck, try to read off the part number of the chip (IC1) then try to get the datasheet. If you can atleast find out which pin are the supply voltage for this chip and then trace back to the 5 wires then you are atleast 2 wires down

You can easily find out which is the ground by tracing a big grounded copper on the PCB back to the 5 wires, normally the mounting hole are earthed, so you can be sure where your earth is.

Apply the voltage required to this chip as stated on the datasheet. The rest of the wires you just have to guess what they do.

Thats all I can help you...good luck

Or did you already knew which is the supply voltage for the inverter but dont know how much to apply?

Originally Posted by Skraggy_uk

Power to the inverter will normally be off the controller board. This the brightness controls to be operated by OSD/buttons etc on the controller board.

I bought a controller board from mileselec....and a Hirose cable for the screen, i am assured it will work with my screen but i see no way of powering the inverter from the controller. The cable that pretrudes from the inverter goes into the screen, on the other side there is another sockert so perhaps i need another cable? to plug into my controller?


http://www.milesie.co.uk/shop/asp/pr...sp?Product=291

Originally Posted by Ricky327

From having seen alot of laptops inverter theres normally 2 connectors on the inverter board. Usually theres the HV and the controls connector, the HV goes directly to the screen backlight.

Some uses 5 or 6 wires. 2 of the wires is obviously the supply voltage. If you are really stuck, try to read off the part number of the chip (IC1) then try to get the datasheet. If you can atleast find out which pin are the supply voltage for this chip and then trace back to the 5 wires then you are atleast 2 wires down

You can easily find out which is the ground by tracing a big grounded copper on the PCB back to the 5 wires, normally the mounting hole are earthed, so you can be sure where your earth is.

Apply the voltage required to this chip as stated on the datasheet. The rest of the wires you just have to guess what they do.

Thats all I can help you...good luck

Or did you already knew which is the supply voltage for the inverter but dont know how much to apply?

I havent been able to find a data sheet for the inverter at all.....the pdf for the lcd does mention an inverter, and i assume its the one that came with the screen but it make no mention of its part No.!!!

http://www.lcdspecifications.com/nec...448ac33-18.pdf

It does use Vddb as a reference to the supply voltage and later on its says vddb = 12v but i have no idea of ampage or where to get the power from!!

Originally Posted by Skraggy_uk

I think this is the same controller.

And it shows a setup for the inverter.

mmm it looks like it plugs in at the top.....im sure i had a good look and decided that inverter plug wasnt going to fit anywhere. ill give it a through going over tonight when i get back.

Cheers for your help skraggy.......

ok ill have a look. Wont the ampage matter?