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!