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Lemony Vengeance
12-29-2013, 01:32 AM
Hey all,

My personal J-Genny has some color issues..

Here's a normal picture:

http://img.photobucket.com/albums/v207/dillweed22/pics%20shared%20online/Neo%20geo%20dot%20com/temporary_zpsb42f7509.jpg

Here's mine:

http://img.photobucket.com/albums/v207/dillweed22/pics%20shared%20online/Neo%20geo%20dot%20com/temporary_zps53e4eedd.jpg

Again, here's a NORMAL one:

http://img.photobucket.com/albums/v207/dillweed22/pics%20shared%20online/Neo%20geo%20dot%20com/temporary_zps16922d8f.jpg

And here's mine:

http://img.photobucket.com/albums/v207/dillweed22/pics%20shared%20online/Neo%20geo%20dot%20com/temporary_zps72f1da1a.jpg

I've tried pulling the video from the 315-5313 as well as the normal location:

http://www.neo-geo.com/forums/attachment.php?attachmentid=5197

One day it was working, then it wasn't.. it's possible that one of the resistors needs to be replaced..

any help would be appreciated. :D

Xian Xi
12-29-2013, 01:36 AM
Is there anything on the RGB lines inline?

Lemony Vengeance
12-29-2013, 01:52 AM
Here's the pic from the schematics:

http://content.screencast.com/users/LemonyVengeance/folders/Jing/media/124b26a4-ada7-4213-8ac0-d94d7f9ef4f1/2013-12-28_2347.png

The pic above shows that it is soldered to the non VCC side of the RGB lines (with the arrows ;) ).

I'll have to rewire a jamma edge to it to check it out since it's been some time since I checked it out. I checked out each color individually and they all display so it's not like a color is dead.

Xian Xi
12-29-2013, 02:12 AM
If the levels are all even then it would be the sync.

Jibbajaba
12-29-2013, 02:24 AM
It looks like your R line is hotter than the other two. Is this a JAMMAfied Genesis? If so, have you checked to see what the RGB lines coming out of the video port look like with a normal Genny RGB cable?

Since you have a resistor on that R line, I'd try changing that out and see if it helps.

Lemony Vengeance
12-29-2013, 02:55 AM
Here's what the colors look like on their own:

Red:
http://img.photobucket.com/albums/v207/dillweed22/temporary_zps21a46b76.jpg

Green:
http://img.photobucket.com/albums/v207/dillweed22/temporary_zpsa6119e20.jpg

Blue:
http://img.photobucket.com/albums/v207/dillweed22/temporary_zps2eca9a56.jpg
(if it doesn't show up: http://img.photobucket.com/albums/v207/dillweed22/temporary_zps2eca9a56.jpg)

This is with C-sync pulled from pin 20 of the encoder. I'm going to wire up a LM1881N Circuit to C-vid and give this a shot as well to rule out any sync issues.

Lemony Vengeance
12-29-2013, 12:42 PM
Just checks with the lm 1881n as well as pulling c-sync directly from the 315-5313 (pin 42, I believe) and no change, so its not a sync issue.

Dion
12-29-2013, 08:32 PM
Can't see the blue but the green looks off to me.

codecrank
12-29-2013, 09:12 PM
Can't see the blue but the green looks off to me.

I agree, the greens looks weak, which is why the white appears purple ( red + blue = purple)

Lemony Vengeance
12-29-2013, 09:25 PM
I agree, the greens looks weak, which is why the white appears purple ( red + blue = purple)

agreed. any ideas on how to fix it?

skinny503
12-29-2013, 11:24 PM
Adjustable pots for the red,green, and blue so you can tune to each monitor?