How to plot already made circuits

[chikenman31]

Hey,

Just wondering how to plot already made circuits, trying to figure out which pin is which for video, power supply, ect.
I've been told that i need the schematics from the company they were produced from but i think i can do it another way.

please help, relatively new at this.

[Mario]

Sometimes there will be silkscreening on the board. If it's a game system, it should be easy to tell, at it'll be labeled on the case which port is AV.

[chikenman31]

this is for a samsung Sens 800 lcd monitor

the thing is huge and it would go perfectly with my n64

but it doesn't have any silk screening

[tom61]

this is for a samsung Sens 800 lcd monitor

the thing is huge and it would go perfectly with my n64

but it doesn't have any silk screening

If it's still has a case, just follow the wires from the A/V in ports.

[chikenman31]

Thank you Mario, and Tom61, but i have figured it out.
Around the input data strip for the monitor there were many pin outs with orange circles around them, and only one with a white arrow pointing in to one of the pins. This gave me an idea, why would there be many circles and only one symbol signifying any sort of data input. I connected the N64 motherboard's video out put to the pin with the white arrow and checked it for continuity with my multimeter and sure enough, the connection was a success.

Sorry i don't have any pics, but i will soon put some up.

Now i only have to obtain a suitable power source for my port.

Thanks again for your information