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attempting a video mod with very little results. help


3 replies to this topic

#1 grafixbmp OFFLINE  

grafixbmp

    Dragonstomper

  • 659 posts
  • Location:South Central US

Posted Wed May 25, 2011 3:20 PM

I set out to take my light sixer and get rid of a horrible RF signal. SO I looked up the easiest I could pull off on my budget and went with the latest from Ben at http://benheck.com/b...i2600VidMod.htm Unfortunately his tutorial is missing where 5+ v came from and doesn't cover a six switch unit so I was able to fill in the gaps with "the atari 2600 video mods comparison project" site. So I constructed the circuit and checked the components over half a dozen times so I know the're right. I also checked for bridged contacts as well. I removed the resistors for TIA pin 2 5 7 and 8 and I also removed the one at the audio point.

I now have wires for:
5v +
gnd
pin 2
pin 5
pin 7
pin 8
audio

As of now I have no picture on either a CRT or LCD.
Audio sounds fine on the CRT but is horribly muffled on the LCD. On this should I remove/ cut any other items on the main board for the sound to come through clear? Any help please. And to think I went to school for this stuff years ago. :roll:

ps I've rewired the circuit a second time with fresh wire and replaced the original 2n4401 with a spare thinking I may have blown the first one. Still no luck. :sad:

Edited by grafixbmp, Wed May 25, 2011 3:25 PM.


#2 horseboy OFFLINE  

horseboy

    Stargunner

  • 1,226 posts

Posted Wed May 25, 2011 6:33 PM

I can hook you up with a good s-video mod. Drop me a PM.

View Postgrafixbmp, on Wed May 25, 2011 3:20 PM, said:

I set out to take my light sixer and get rid of a horrible RF signal. SO I looked up the easiest I could pull off on my budget and went with the latest from Ben at http://benheck.com/b...i2600VidMod.htm Unfortunately his tutorial is missing where 5+ v came from and doesn't cover a six switch unit so I was able to fill in the gaps with "the atari 2600 video mods comparison project" site. So I constructed the circuit and checked the components over half a dozen times so I know the're right. I also checked for bridged contacts as well. I removed the resistors for TIA pin 2 5 7 and 8 and I also removed the one at the audio point.

I now have wires for:
5v +
gnd
pin 2
pin 5
pin 7
pin 8
audio

As of now I have no picture on either a CRT or LCD.
Audio sounds fine on the CRT but is horribly muffled on the LCD. On this should I remove/ cut any other items on the main board for the sound to come through clear? Any help please. And to think I went to school for this stuff years ago. :roll:

ps I've rewired the circuit a second time with fresh wire and replaced the original 2n4401 with a spare thinking I may have blown the first one. Still no luck. :sad:


#3 grafixbmp OFFLINE  

grafixbmp

    Dragonstomper

  • 659 posts
  • Location:South Central US

Posted Wed May 25, 2011 11:52 PM

View Posthorseboy, on Wed May 25, 2011 6:33 PM, said:

I can hook you up with a good s-video mod. Drop me a PM.

View Postgrafixbmp, on Wed May 25, 2011 3:20 PM, said:

I set out to take my light sixer and get rid of a horrible RF signal. SO I looked up the easiest I could pull off on my budget and went with the latest from Ben at http://benheck.com/b...i2600VidMod.htm Unfortunately his tutorial is missing where 5+ v came from and doesn't cover a six switch unit so I was able to fill in the gaps with "the atari 2600 video mods comparison project" site. So I constructed the circuit and checked the components over half a dozen times so I know the're right. I also checked for bridged contacts as well. I removed the resistors for TIA pin 2 5 7 and 8 and I also removed the one at the audio point.

I now have wires for:
5v +
gnd
pin 2
pin 5
pin 7
pin 8
audio

As of now I have no picture on either a CRT or LCD.
Audio sounds fine on the CRT but is horribly muffled on the LCD. On this should I remove/ cut any other items on the main board for the sound to come through clear? Any help please. And to think I went to school for this stuff years ago. :roll:

ps I've rewired the circuit a second time with fresh wire and replaced the original 2n4401 with a spare thinking I may have blown the first one. Still no luck. :sad:
Thanks but I'm not interested in an s-video mod. I would prefer composite. and I don't need another mod since I built my own. I am only asking if any other components need to be removed from the main board besides what I've already done? Anyone else?

#4 Hatta OFFLINE  

Hatta

    Dragonstomper

  • 739 posts

Posted Thu May 26, 2011 3:36 PM

View Posthorseboy, on Wed May 25, 2011 6:33 PM, said:

I can hook you up with a good s-video mod. Drop me a PM.


I saw this post. I would like to see this mod. :D




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