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Issues with RGB Scart to xrgb mini


robbievgb
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So I was pretty stoked to get my Jaguar hooked up to my xrgb mini after seeing how awesome the Genesis looked, but when I did, I get these "wavy" horizontal lines. I's pretty noticeable in the Kasumi Ninja intro.

 

(video of the issue)

 

I've tried playing around with the settings on the xrgb to no avail. The colors actually look amazing, but those damn lines are very annoying.

 

Here's my setup:

 

Jaguar
-->RGB Scart to XRGB RGB Adapter with Sync Stripper
-->RGB input on Frememeister
I've used the same setup with two RGB SCART cables (a Genesis cable w/ Csync and from a Toro box (Dreamcast) and none of them have this issue.
Is this something wrong with my Jaguar itself? has anyone else had this issue with a similar setup?
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The wavy lines suggest connection / cable issue, probably ground. If the Jag connector is clean, you might want to open up the cable to make sure everything is connected and soldered good.

 

I've attached a Jag xrgb profile I created. Output should be 1080p and zoom on. It's 5x so it cuts off a few lines on the top and bottom. Aspect ratio looks correct.

 

For what it's worth, I've had no problem here with my Jag cable from Retro Gaming Cables. However, I've read of a number of people having problems, usually with soldering and grounding.

 

 

@@@@EDIT

 

I notice you are US based. I now get all my cables from eBay seller retro_console_accessories. I've read very positive things and have not had any problems with their cables.

 

Also, you probably know this, but there is a dedicated xrgb thread at the shumps forum. It's 323 pages and there seem to be some good xrgb experts providing advise. http://shmups.system11.org/viewtopic.php?f=6&t=33450

JAGUAR5X.BIN

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Are you using an Atari psu on the Jaguar. I noticed if I used a 3rd party ac or an old Sega Model 1 ac it would produce the wavy image. The old Sega AC was probably going bad do to old caps. My old Atari PSU worked fine and even a new Atari PSU I got from Best for my Jag CD worked fine. But any other AC would produce those images.

Edited by goaltoss
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Wow! I wasn't sure what to expect as I am brand new here, but this is awesome feedback!

 

I've already tried cleaning the contacts with 70% isopropyl alcohol, and I've heard of the brasso method before, would that be any better?

 

The wavy lines suggest connection / cable issue, probably ground. If the Jag connector is clean, you might want to open up the cable to make sure everything is connected and soldered good.

I've attached a Jag xrgb profile I created. Output should be 1080p and zoom on. It's 5x so it cuts off a few lines on the top and bottom. Aspect ratio looks correct.

For what it's worth, I've had no problem here with my Jag cable from Retro Gaming Cables. However, I've read of a number of people having problems, usually with soldering and grounding.


@@@@EDIT

I notice you are US based. I now get all my cables from eBay seller retro_console_accessories. I've read very positive things and have not had any problems with their cables.

Also, you probably know this, but there is a dedicated xrgb thread at the shumps forum. It's 323 pages and there seem to be some good xrgb experts providing advise. http://shmups.system11.org/viewtopic.php?f=6&t=33450

 

I've received two cables from the Retro Gaming Cables in the UK, as the first one had this issue too. I also tried one from Retro Computer Shack which was the same story, so I'd assumed all three cables couldn't have been bad and it was something else.

 

Thank you for the profile bin, that saves me a lot of initial trial and error. I haven't seen that specific shmups thread, so I will bookmark it now.

 

I originally planned to do do all of my SCART cable purchases from retro_console_accessories, they made my Genesis cable and my powered SCART to RGB input w/ sync stripper, but they didn't have a Jaguar cable available.

 

Are you using an Atari psu on the Jaguar. I noticed if I used a 3rd party ac or an old Sega Model 1 ac it would produce the wavy image. The old Sega AC was probably going bad do to old caps. My old Atari PSU worked fine and even a new Atari PSU I got from Best for my Jag CD worked fine. But any other AC would produce those images.

 

I'm using an original PSU on the Jag, and a third party on the JagCD, I'll hunt down an original Atari one and see if that helps. Can you still get them from Best? I've been putting off an order from them for a while, so it might be time to bite the bullet.

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Here's some helpful links:

 

RGB pinout for classic consoles including Jag showing positions of any needed capacitors in the cable: http://members.optusnet.com.au/eviltim/gamescart/gamescart.htm

 

Excellent XRGB mini profiles (scroll to bottom of page for link, which is updated periodically): http://www.firebrandx.com/pixelpurist.html

 

Attached are profiles I created for Jaguar, Turbografx 16 and Sega Saturn

more xrgb profiles.zip

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So before posting I did find a thread on here that talked adding the resistor, but for some reason I though it was a 3.3kOhm.

 

Now, here is one of the cables from Retro Gaming Cables, it already has a resistor crossing two pins, but it looks like a 180ohm

 

post-43215-14652649497_thumb.jpgpost-43215-146526495499_thumb.jpg

 

Should I still try adding the 1.2kOhm on pin 20?

 

Apparently that my phone keyboard doesn't have the ohm symbol on it :)

Edited by robbievgb
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Just out of curiosity, what resolution do you have set on the Framemeister? I was doing some experimenting with mine this past weekend with other systems and I get similar results if I use an interlaced resolution (like 1080i). Doing a progressive resolution (720p, 1080p) fixes it.

 

*edit: reading further and hearing about similar examples, it's probably the cable.

Edited by Austin
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So before posting I did find a thread on here that talked adding the resistor, but for some reason I though it was a 3.3kOhm.

 

Now, here is one of the cables from Retro Gaming Cables, it already has a resistor crossing two pins, but it looks like a 180ohm

 

attachicon.gif20160606_185350.jpgattachicon.gif20160606_185340.jpg

 

Should I still try adding the 1.2kOhm on pin 20?

 

Apparently that my phone keyboard doesn't have the ohm symbol on it :)

 

The resistor in the scart plug is for the TV. It has to do with switching to that source when the game console is turned on. I think it also switches to 4:3 or 16:9 depending on the voltage. Zerosquare wants you the put a 1.2 kΩ resistor inline with pin 20 of the cable. Pin 20 is the composite video in or in your case sync in. You're having a sync problem by the look of your YouTube video.

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The resistor in the scart plug is for the TV. It has to do with switching to that source when the game console is turned on. I think it also switches to 4:3 or 16:9 depending on the voltage. Zerosquare wants you the put a 1.2 kΩ resistor inline with pin 20 of the cable. Pin 20 is the composite video in or in your case sync in. You're having a sync problem by the look of your YouTube video.

Ah okay. That's probably where my confusion was. I'll stop by radio shack tomorrow and pick some up.

 

I also have a official Atari PSU on order from Best Electronics to eliminate that as a potential cause.

 

Thanks for help everyone, I'll report back with my results after I've tried all the suggestions. Really stoked to see the Jaguar in its full glory once I get this sorted out.

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So I was pretty stoked to get my Jaguar hooked up to my xrgb mini after seeing how awesome the Genesis looked, but when I did, I get these "wavy" horizontal lines. I's pretty noticeable in the Kasumi Ninja intro.

 

(video of the issue)

 

I've tried playing around with the settings on the xrgb to no avail. The colors actually look amazing, but those damn lines are very annoying.

 

Here's my setup:

 

Jaguar
-->RGB Scart to XRGB RGB Adapter with Sync Stripper
-->RGB input on Frememeister
I've used the same setup with two RGB SCART cables (a Genesis cable w/ Csync and from a Toro box (Dreamcast) and none of them have this issue.
Is this something wrong with my Jaguar itself? has anyone else had this issue with a similar setup?

 

 

Try adjusting the Sync_Level and see if the picture gets more stable.

 

To my eyes, it looks like a TV doing a bad job de-interlacing 480i video. As others mentioned double check you have the output set to 1080p.

 

If you have a regular Euro-scart to mini adapter, I would test that as well. There is no need for a sync-stripper when using a CSYNC cable.

 

Good luck!

Edited by kgenthe
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Try this:

- open the SCART end of your Jaguar video cable (unscrew the round plastic part)

- desolder the wire going to pin #20

- solder a 1.2 kΩ resistor between the wire end and pin #20

Zerosquare you are my hero! This did the trick! RadioShack actually didn't have a 1.2kOhm resistor so I used a 1k and a 220 in series. Multimeter was reading about 1.8-1.9 so I figured that would be close enough.

 

I didn't think it would be this easy!

 

Why did I have to put more resistance in the composite signal? Is this something specific to the Jaguar or because of my setup with the additional sync stripper?

 

Can't wait to get a game of Raiden going!

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Cool :)

 

 

Why did I have to put more resistance in the composite signal? Is this something specific to the Jaguar or because of my setup with the additional sync stripper?

That's because of your C-sync cable. The C-sync output from the Jaguar is meant to drive RGB monitors with a high-level, high-impedance input (5 V / a few kΩ), not the low-level, low impedance input of a SCART TV/converter (0.3 V / 75 Ω). CRT TVs usually tolerate this, but LCD ones and converters are more picky. The additional resistor fixes this.

Edited by Zerosquare
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