Genesis Color issue

Lemony Vengeance · Dec 29, 2013

Hey all,

My personal J-Genny has some color issues..

Here's a normal picture:

Here's mine:

Again, here's a NORMAL one:

And here's mine:

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

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.

Xian Xi · Dec 29, 2013

Is there anything on the RGB lines inline?

Lemony Vengeance · Dec 29, 2013

Here's the pic from the schematics:

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 · Dec 29, 2013

If the levels are all even then it would be the sync.

Jibbajaba · Dec 29, 2013

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 · Dec 29, 2013

Here's what the colors look like on their own:

Red:

Green:

Blue:

(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 · Dec 29, 2013

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 · Dec 29, 2013

Can't see the blue but the green looks off to me.

codecrank · Dec 29, 2013

Mitsurugi-w said:
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 · Dec 29, 2013

codecrank said:
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 · Dec 29, 2013

Adjustable pots for the red,green, and blue so you can tune to each monitor?

Genesis Color issue

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