Need help with composite video.

[jeffslot]

Hi guys,

 

I tried to perform the Composite video mod. However it doesn't seem to be working out too well for me. The image kind of flickers onto the screen, sometimes in color & sometimes not. Then the screen usually disappears. Any help would be greatly appreciated (I want to teach my 6yr old how to play warlords). Thanks

 

Jeff S

 

(below is a pic of what I did so far)

http://img473.imageshack.us/img473/6746/img00588xi.jpg

[Spirantho]

Which mod are you trying? I can't see very clearly in the photo but it looks like you have just connected the signal wire of the video cable to a resistor! If that is what you're trying... it won't work.

[jeffslot]

Hello,

 

I was begining to think that no one was going to try to help me out - thanks.

 

I'm trying to do the composite video mod shown at the below link:

 

http://www.atariage.com/howto/composite.html

 

The wire isn't connected to the resistor, but it is connected to the silver circle at the bottom of the resistor. Maybe I'm not understanding the diagram correctly, I though that is what "C19" was.

 

I will try to take a better picture tonight when I get home.

 

Jeff S

[jeffslot]

Hi,

 

Here is a much better picture as far as detail goes. Please help, as I really, really want to play some atari. Thanks.

 

http://img406.imageshack.us/img406/8584/img00632ei.jpg

 

Jeff S.

[+Mitch]

That is a not really a very good composite mod, it only works on about 50% of TVs. You can try running it through a VCR first or better yet, go here and scroll down to the mod that uses the CD4050 chip.

 

Mitch

[A.J. Franzman]

Jeffslot, your image does not match the ASCII-matic from AA. The resistor that you are supposed to connect the jumper wire to is given by AA as color coded "Gold/Red/Grey/Blue" (BTW, this is backwards! The color bands should be read as blue-gray-red-gold {6.8k ohms, 5% tolerance}). The resistor you connected to is orange-orange-red-gold (3.3k ohms).

 

Whether this discrepancy is due to an error in the instructions, or your board being a different revision, I don't know. In any case, it's likely that you have a wrong connection point, and that moving that jumper wire to one end or the other of the 6.8k resistor to the right of the test point may give you the correct signal. If neither end of that resistor fixes the problem, you will need to track down the correct connection point by some other means.

Edited March 7, 2006 by A.J. Franzman

[jeffslot]

Thanks for getting back to me guys. Tonight I will try moving the my connetion point to the resistor to the right.

 

I'm really just trying to get my video working with the least complicated fashion. I'll let you know how it goes. thansk.

 

Jeff S.

[jeffslot]

Hi guys,

 

I getting somewhere, I think. Below is a picture of how my TV is coming out.

 

http://img96.imageshack.us/img96/9244/img00694cz.jpg

 

below is how my wiring looks.

 

http://img49.imageshack.us/img49/43/img00704vq.jpg

 

Help.