Hi there,
I've been given a 40" lcd panel, with no psu. I wanted to strip it back and use it as a table for reactivision. ( http://www.reactivision.com ) I am also very poor, and would like to avoid buying a power supply if i can.
I have found the service manual for the panel, i dont have the model number to hand, but it's saved on my main pc.
As far as i can tell, there is a mainboard, which contains a driver chip and a vga input. I was hoping to ignore the other 4 input bords, disconnect them, and simply power up the bare lcd without.
Does this sound very ambitious? I've figured out where to send what voltages to power up the board, but as this involves rigging an old laptop and psu together, i am dubious and definitely worried about blowing the board and the connected panel.
I've been browsing this forum for a fair few years, it's amazing how far diy projection has come along. I figured if anyone knows about stripping back panels it's gna be you lot.
greeef
Full Version: A panel with no power supply...
QUOTE (greeef @ Aug 20 2009, 06:15 PM) 
Hi there,
I've been given a 40" lcd panel, with no psu. I wanted to strip it back and use it as a table for reactivision. ( http://www.reactivision.com ) I am also very poor, and would like to avoid buying a power supply if i can.
I have found the service manual for the panel, i dont have the model number to hand, but it's saved on my main pc.
As far as i can tell, there is a mainboard, which contains a driver chip and a vga input. I was hoping to ignore the other 4 input bords, disconnect them, and simply power up the bare lcd without.
Does this sound very ambitious? I've figured out where to send what voltages to power up the board, but as this involves rigging an old laptop and psu together, i am dubious and definitely worried about blowing the board and the connected panel.
I've been browsing this forum for a fair few years, it's amazing how far diy projection has come along. I figured if anyone knows about stripping back panels it's gna be you lot.
greeef
I've been given a 40" lcd panel, with no psu. I wanted to strip it back and use it as a table for reactivision. ( http://www.reactivision.com ) I am also very poor, and would like to avoid buying a power supply if i can.
I have found the service manual for the panel, i dont have the model number to hand, but it's saved on my main pc.
As far as i can tell, there is a mainboard, which contains a driver chip and a vga input. I was hoping to ignore the other 4 input bords, disconnect them, and simply power up the bare lcd without.
Does this sound very ambitious? I've figured out where to send what voltages to power up the board, but as this involves rigging an old laptop and psu together, i am dubious and definitely worried about blowing the board and the connected panel.
I've been browsing this forum for a fair few years, it's amazing how far diy projection has come along. I figured if anyone knows about stripping back panels it's gna be you lot.
greeef
My recommendation is this. http://computerguru365.blogspot.com/2008/0...el-monitor.html . It works for small panels. And hopefully your 40 inch.
QUOTE (Vendeta @ Aug 21 2009, 06:12 AM)
My recommendation is this. http://computerguru365.blogspot.com/2008/0...el-monitor.html . It works for small panels. And hopefully your 40 inch.
Hi there
Thanks for your reply. My problem is that i need a 17.5V supply and a 9V supply. I have two seperate adapters, but i wouldnt be confident about tying the grounds of two independent supplies together (a laptop supply and a guitar supply incidentally)
As i am totally missing the psu, it would take a while to figure out the voltages expected on it's multitude of outputs around the panel, has anyone tried stripping extraneous input circuitry out of a panel before?
So long as those power supplies are isolated, there will be no problem tying the grounds together. There would only be a problem if both supplies were tied to earth ground, and the positive rail of one were tied and the negative rail of the other.
Many audio amplifiers will use separate transformers for different audio channels, and they do this all the time, where the grounds for the different channels will be tied together. It's not a problem at all.
Many audio amplifiers will use separate transformers for different audio channels, and they do this all the time, where the grounds for the different channels will be tied together. It's not a problem at all.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.