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Author Topic: Odd Pinout on VGA Cable  (Read 3087 times)

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Yeltsew7

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Odd Pinout on VGA Cable
« on: April 14, 2014, 08:14:29 pm »
Today I broke open a VGA (15 pin D-SUB) cable and tested the pinouts.  I tested continuity to each wire from each pin.  What I found didn't match up with any of the pinouts I've seen on the Internet.  It is a Belkin cable that I've had for a while, and it's always worked for me.

Inside the cable, there are 11 wires as well as the wrapping that goes to the shield.  The is a fat blue, a fat red, a fat green, a skinny red, a skinny blue, a skinny green, a skinny black, a skinny white, a skinny yellow, a skinny orange and a skinny brown.  http://www.theavguide.co.uk/AdvHTML_Upload/vgaplug3.jpg is what I've been using for a pinout, as well as some things I've seen on the forums.

I numbered the pins 1-15, with the fat side up.  On the top row, 1-5 from left to right.  In the middle, 6-10 from left to right.  On the bottom, 11-15 from left to right.

I will post pictures, but until then I will write it out here.

FAT RED -> PIN 6
FAT BLUE -> PIN 8
FAT GREEN -> PIN 7 _AND_ 2 I got continuity from both of these pins.  Not sure if there's an issue with my cable or if this is right.
SKINNY RED -> PIN 14
SKINNY BLUE -> PIN 4
SKINNY GREEN -> PIN 10
SKINNY BLACK -> PIN 11
SKINNY WHITE -> PIN 5
SKINNY YELLOW -> PIN 15
SKINNY ORANGE -> PIN 13
SKINNY BROWN -> PIN 12

Is this just a bad cable?  If so, are there any cables that you recommend?  I am looking to build an RGB to SCART adapter to go to the transcoder that Rob recommends.

rCadeGaming

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Re: Odd Pinout on VGA Cable
« Reply #1 on: April 15, 2014, 10:09:56 pm »
Pins 2 and 7 are green and green ground.  Do you mean there is continuity between those two?  That would cause you problems.

Yeltsew7

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Re: Odd Pinout on VGA Cable
« Reply #2 on: April 17, 2014, 06:24:23 pm »
No, I have continuity between the big green wire and pin 2, and continuity between the big green wire and pin 7.  I made a little diagram.  It shows how I numbered the pins, and each wire and what pins it goes to.

rCadeGaming

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Re: Odd Pinout on VGA Cable
« Reply #3 on: April 19, 2014, 09:51:24 am »
I think we are having a misunderstanding in terms of how we're wording things.  I can't figure out what you mean.  Take a look at your last post.  If there is continuity between the big green wire and pin 2, and there is continuity between the big green wire and pin 7, then you can't not have continuity between pin 2 and pin 7.  I don't know if that's what you meant though.

The three big wires are probably shielded wires for the red, green and blue signals, with the center conductor carrying a color signal and the shielding grounded.  Make sure you have these wires properly stripped with both the shielding and the center conductor accessible and separated.



I think that's why you're missing pins 1 and 3, and why you're getting strange readings on pin 2.  It is normal to be missing pin 9.  It's an optional connection that sometimes carries +5v, but often isn't used.
« Last Edit: April 19, 2014, 03:18:55 pm by rCadeGaming »

Yeltsew7

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Re: Odd Pinout on VGA Cable
« Reply #4 on: April 19, 2014, 10:32:39 am »
If there is continuity between the big green wire and pin 2, and there is continuity between the green wire and pin 7, then you can't not have continuity between pin 2 and pin 7.
Oh yeah, I wasn't thinking about that.

I'll take a look to see about the big wires and if there is another cable inside of them.

rCadeGaming

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Re: Odd Pinout on VGA Cable
« Reply #5 on: May 03, 2014, 06:48:28 pm »
Did you get this solved?

Yeltsew7

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Re: Odd Pinout on VGA Cable
« Reply #6 on: May 03, 2014, 07:45:41 pm »
Why yes, I did!

rCadeGaming

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Re: Odd Pinout on VGA Cable
« Reply #7 on: May 03, 2014, 07:55:03 pm »
Well..... what was the outcome?

Yeltsew7

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Re: Odd Pinout on VGA Cable
« Reply #8 on: May 03, 2014, 09:42:51 pm »
there were other wires inside of the thick wires, which carried the RGB signals

rCadeGaming

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Re: Odd Pinout on VGA Cable
« Reply #9 on: May 03, 2014, 09:44:37 pm »
 :cheers: