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Longhorn Engineer

Member Since 6 Apr 2007
OFFLINE Last Active Sep 12 2011 10:38 AM

Posts I've Made

In Topic: Atari A/V mod update

Wed Aug 10, 2011 1:06 PM

View Postphattyboombatty, on Wed Aug 10, 2011 1:03 PM, said:

Got my replacement board, and soldered it together yesterday... Same problem: black and white video on the 7800, and either scrambled or black screen on the 2600 side. I want to say that Joe Martowicz has been tremendously helpful in troubleshooting this with me. Don't know the relationship between Martowicz and LHE, but I still believe it's a great design. Hoping I can get it fully functional soon!

I'm tempted to modify my original 1984 Warner Communications model, but I don't want to start clipping things just yet. I did completely remove the RF modulator box, so I'm hoping that doesn't affect anything.


Can you post some high resolution shots of the connections you made?

I just sell PCBs to Joe but I am the one that designed the mod.

In Topic: Atari A/V mod update

Wed Aug 3, 2011 6:40 PM

View Postphattyboombatty, on Wed Aug 3, 2011 11:59 AM, said:

View PostLonghorn Engineer, on Wed Aug 3, 2011 2:56 AM, said:

View Postphattyboombatty, on Thu Jul 28, 2011 2:38 PM, said:

View PostLendorien, on Sun Oct 3, 2010 6:11 AM, said:

View PostDeteacher, on Sat Oct 2, 2010 7:21 PM, said:

2. With all 7800 games, I get no color at all. Just black and white images:

Attachment IMG_0383.JPG

Attachment IMG_0384.JPG

I have no idea how to troubleshoot this one. By the way, the same symptoms happen with both S-Video and Composite outputs.

Any thoughts at all would be greatly appreciated. :)

EDIT: I have another 2600-related issue. I popped in Asteroids and the characters seem to jump around...almost like it's a vertical-hold issue, but I've got it hooked up to an HDTV. Thoughts?

I had the black and white issue when I got mine as well. I ended up having to touch up the soldering on one of the chips per LH's suggestion. It was the really tiny chip. I needed to reflow the solder. With my lousy hand steadiness, it was quite the chore.

Hi all,

I just purchased and installed my LHE video mod for the Atari 7800. Picture in the 7800 mode is clear albeit in black and white over S-video and composite. 2600 mode is scrambled and also in black and white. I've tried this on both my Westinghouse W4207 and a Dell FPD on both channels. I've done a pretty rigorous search on how to resolve this issue, but these posts are the closest I've come.

I've checked all my connections—especially to pin 9 (chroma)—and even replaced a few wires. In 2600 mode, I adjusted the lower potentiometer and this helped the V-Hold, but the image is still off-center and black and white.

Can anyone help me with this issue? I'm dying to play my ProSys in full color!

Thanks!

Sounds like the tiny chip in the bottom right corner is not working correctly. That chip passes the chroma signal.

Thanks LHE! I found that post several pages back, and I do believe that's the problem. Since I purchased mine from electronicsentimentalities, I e-mailed him, and he's going to replace the board.

I did attempt to reflow the solder on the little guy, but it just wasn't happening.

Cheers to a fantastic design! Even in b/w it is remarkably crisp and sharp!

No problem!

In Topic: Atari A/V mod update

Wed Aug 3, 2011 2:56 AM

View Postphattyboombatty, on Thu Jul 28, 2011 2:38 PM, said:

View PostLendorien, on Sun Oct 3, 2010 6:11 AM, said:

View PostDeteacher, on Sat Oct 2, 2010 7:21 PM, said:

2. With all 7800 games, I get no color at all. Just black and white images:

Attachment IMG_0383.JPG

Attachment IMG_0384.JPG

I have no idea how to troubleshoot this one. By the way, the same symptoms happen with both S-Video and Composite outputs.

Any thoughts at all would be greatly appreciated. :)

EDIT: I have another 2600-related issue. I popped in Asteroids and the characters seem to jump around...almost like it's a vertical-hold issue, but I've got it hooked up to an HDTV. Thoughts?

I had the black and white issue when I got mine as well. I ended up having to touch up the soldering on one of the chips per LH's suggestion. It was the really tiny chip. I needed to reflow the solder. With my lousy hand steadiness, it was quite the chore.

Hi all,

I just purchased and installed my LHE video mod for the Atari 7800. Picture in the 7800 mode is clear albeit in black and white over S-video and composite. 2600 mode is scrambled and also in black and white. I've tried this on both my Westinghouse W4207 and a Dell FPD on both channels. I've done a pretty rigorous search on how to resolve this issue, but these posts are the closest I've come.

I've checked all my connections—especially to pin 9 (chroma)—and even replaced a few wires. In 2600 mode, I adjusted the lower potentiometer and this helped the V-Hold, but the image is still off-center and black and white.

Can anyone help me with this issue? I'm dying to play my ProSys in full color!

Thanks!

Sounds like the tiny chip in the bottom right corner is not working correctly. That chip passes the chroma signal.

In Topic: Current Video Mods (2600)

Thu Jul 21, 2011 8:20 PM

View PostGeffersan, on Thu Jul 21, 2011 2:23 PM, said:

View PostGeffersan, on Sun May 1, 2011 4:29 PM, said:

Don't order from the LHE directly, i placed my order last November and i'm still waiting!

Just to update this, i have since received the mod so hopefully Longhorn is now uptodate.
Awesome picture quality on S-video btw

I am but I am not taking direct orders right now. I am selling bulk PCBs to people that want to sell mods however. I want to get back to selling them but I do not have time to assemble all those orders.

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