Help finding Chroma and Audio pins

ssnik992 · Post by **ssnik992** » Mon Jun 11, 2007 10:03 am

I know I should not have any troubles with this, but I am having a lot of difficulty finding the Chroma and Audio pins on my 4-switch Atari, model CX-2600 A and manufactured in Taiwan. I can send pictures if needed. Please respond ASAP!

11up · Post by **11up** » Mon Jun 18, 2007 6:00 pm

I haven't seen the insides of a 4 switch Atari, but pay close attention to HK-47's tutorial, and you may find what you're looking for.
http://benheck.com/phpBB/viewtopic.php?t=1152
Quoting from his post:
Flip the 4-switch Atari 2600 board over, and look in the lower left-hand corner, well, about 3.25 inches from the left-most edge. You should see something that looks like this...
Hook up wires to these 2 points. If you need to double-check, flip the board over and make sure the resistor and capacitor numbers are correct. Now you have audio and chroma connections.
Since you asked, I thought I'd help. If you still can't figure it out, post up a picture of both sides of the board and I can hopefully point you to it.

rmolina · Post by **rmolina** » Sun Dec 16, 2007 12:26 pm

11up wrote:http://benheck.com/phpBB/viewtopic.php?t=1152

Image links are broken

Post by **bicostp** » Sun Dec 16, 2007 3:25 pm

Here, that article has been ported to the wiki and the images have been salvaged. (Yay <a href="http://web.archive.org">Wayback Machine</a>!)

http://wiki.benheck.com/index.php/Atari ... posite_Mod

rmolina · Post by **rmolina** » Sun Dec 16, 2007 4:31 pm

Thanks bicostp!
Are the images for the other 2600 models also available?

Fluffy · Post by **Fluffy** » Thu Dec 20, 2007 2:17 pm

Hey, I'm unable to find the chroma spot on my 2600-B. I'm using the mod from <a href="http://benheck.com/book/support/Atari26 ... m">here</a>, but it doesn't reference a chroma spot. All I'm getting is a rolling black and white picture.....

*EDIT*

Managed to find the info on <a href="http://gamesx.com/wiki/doku.php?id=av:2 ... _mod">this page</a> which pointed me towards pin 9 of the TIA chip. I traced it back to (presumably) R210 and a diode, then tied that into pin 2 and it works fine. I didn't end up using the new audio spot, as audio worked just fine straight from pin 12/13.