Compatibility between lcd controller & inverter. (5v vs 12v)

[Scorpent]

Today, one of my friends gave me an old Samsung Syncmaster 943nw(panel is BOE HT190WG1-600). As expected, it wasn't working. I tried to repair the caps, but screwed up the solder points. Now, I want to reuse it by getting a Universal LCD Controller that can run it.

The problem is that, the LCD controller runs on 5v and the inverter is not suitable for the panel 4 CCFL connectors. I went searching again and found this inverter that is perfect, but it runs on 12v. Here's the link to the LCD controller which runs on 5v. Note that the connectors for inverter power is the same on both boards.

My question is can I take 12v & ground wires from the inverter and plug it into a separate psu and plug the brightness control/inverter_on wires into the lcd controller? Is the signal voltage different on different inverters?(5v inverter vs 12v inverter)

[Scorpent]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

Lemme rephrase that question:

Can I take 12v line from the inverter and plug it into the 12v rail and plug the brightness control/inverter_on wires into the 5v lcd controller? Is the signal voltage different on different inverters?(5v inverter vs 12v inverter)

[budm]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

The inverter board spec does not indicate what the requirement for the pin 4 ADJ (Lamp brightness) control Voltage range must be.
Most inverter uses Analog dimming control DCV 1VDC = MIN Brightness, 5VDC = Max brightness. Some may use PWM DIMMING.
The control signal level and the Voltage level for supplying are not related for most Inverter board, you can have the HV Inverter section that runs on 12V or 24V but the control signals will be in the 5V level.
So you need to find out if the control signals from your universal LCD Cotrller is compatible with your universal Inverter board or not, the web page does not show that details spec.

[Scorpent]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

So if I google the datasheet for the microcontroller on the LCD controller and inverter, should it tell me if it runs on analog or PWM signals?

[stj]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

you need the datasheet for the invertor chip, or a schematic

[Scorpent]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

Is it safe to assume that the signal transmission is the same?(considering both connectors are the same, and made in the same era) I cannot find much about the inverter's main chip. The two other's are power mosfets. Also, the inverter may not fit the casing, so I may have to find another one. Any suggestions? So far, I have this in mind which has a slightly simpler circuit, which also I cannot check the mainchip's serial number.

[stj]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

you can assume nothing.

[budm]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

Go look up some LCD panel spec sheets then you will what the requirement are for T-con and for the inverter board, the connector pin out, etc.
Connectors may look the same but it does not mean anything since you need to match each pin's function.
You will have to lots of research for the board and understand how the TV function first before even try to do what are trying to do, bottom line: Learn the basic first.

[Scorpent]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

Alright, after some research, the main IC on the LCD controller(himax hx6856), I found out that it uses PWM for the backlight control. No details on the inverter though, picture was too blurry. Also, do you guys know any where I could get a complete set on the cheap with just a VGA input? I'm currently at my wits end about this project. Or maybe an inverter that operates with pwm signals. I just want a quick and easy way to finish this.

[stj]

Re: Compatibility between lcd controller & inverter. (5v vs 12v)

you can get universal 12v invertors on ebay.