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Thread: Model 1 Sega Genesis Vertical Banding Video Images.

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    Model 1 Sega Genesis Vertical Banding Video Images.

    Hey all,

    I have had a few Genisis/MD consoles over the years but the recent Model 1 that I have has had these vertical bands on the video output. I love the model 1 over the 2 any day but this is a constant quality problem. Could this be dried out capacitors? Or is it another reason? My Model 2 doesn't show them when in use on the same game cart. I will add some pics once I get to my PC.
    (upload pics are being a pain so I will be back with them once I get them using a format this site likes)
    Any input would be welcomed.
    Thank you
    Last edited by NexusX; 08-26-2017 at 09:55 AM.

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    Composite or RF?
    Quote Originally Posted by Sylvie View Post
    Xorthen was on my case for a few days via PM (and then some) offering to pay me $20 just to talk on the phone with me for an hour, but he chickened out or something and then decided to be an asshole in public towards me
    LOL.. Get rekt, lonely boy


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    Could be jailbars too. I do know some Genesis have rainbow banding as well.

    http://www.sega-16.com/forum/showthr...-from-bad-ones

    A lot of these Genesis model 1's are reaching well over 25 years old and are well known to need cap replacements (similar to game gears). It may fix the problem if it is Rainbow Banding and not jailbars.


    he spends hundreds on scarves, of course he's a fag and then ChuChu Flamingo preserved the aftermath in a plastic case making sure it wasn't exposed to unstable air
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    Quote Originally Posted by ChuChu Flamingo View Post
    Could be jailbars too. I do know some Genesis have rainbow banding as well.

    http://www.sega-16.com/forum/showthr...-from-bad-ones

    A lot of these Genesis model 1's are reaching well over 25 years old and are well known to need cap replacements (similar to game gears). It may fix the problem if it is Rainbow Banding and not jailbars.
    I have seen a bit of rainbow banding on this console already but not much. Bands slowly roll upnthe image on the screen at a very faint visible distortion. I have run into that over the years with Model 1 consoles.

    Quote Originally Posted by FilthyRear View Post
    Composite or RF?
    Composite. My eyes can't handle RF.

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    Quote Originally Posted by NexusX View Post
    I have seen a bit of rainbow banding on this console already but not much. Bands slowly roll upnthe image on the screen at a very faint visible distortion. I have run into that over the years with Model 1 consoles.



    Composite. My eyes can't handle RF.
    Composite is hit or miss on any stock Genesis system.
    Quote Originally Posted by Sylvie View Post
    Xorthen was on my case for a few days via PM (and then some) offering to pay me $20 just to talk on the phone with me for an hour, but he chickened out or something and then decided to be an asshole in public towards me
    LOL.. Get rekt, lonely boy


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    After I went RGB, I simply refuse to go back to that awful composite video standard. It's such a stain that it even tried to mess with my model 1 Genesis, where the CXA was throwing jail bars into the blue line of the RGB output. Turns out it was from composite video processing in the chip that was coupling over into the blue line right next to it. I severed the video trace to pin 6 and it instantly cleared the RGB picture to a perfect image.

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    Quote Originally Posted by FBX View Post
    After I went RGB, I simply refuse to go back to that awful composite video standard. It's such a stain that it even tried to mess with my model 1 Genesis, where the CXA was throwing jail bars into the blue line of the RGB output. Turns out it was from composite video processing in the chip that was coupling over into the blue line right next to it. I severed the video trace to pin 6 and it instantly cleared the RGB picture to a perfect image.
    Ya I read that the Composite chip was the problem with RGB jail bars on the model 1. Although I didn't want to dump the time and money into getting native RGB out of my US Genesis. I would be happy with just a clean composite image but that looks like it is not going to be an easy task. But I do have one question... If it is just signal interference from on line to another in close proximity, do you think if I add a bypass wire to extend the space between those lines could that clean up that interference?

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    A rolling hum bar like that is probably from your power supply. Try another if possible.

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    Quote Originally Posted by NexusX View Post
    Although I didn't want to dump the time and money into getting native RGB out of my US Genesis.
    It's incredible. Probably one of the sharpest and cleanest RGB pictures of any console (at least on mine after the jail bar fix). But alas, it is expensive on a modern display to get it looking good. Typically you'd need a Framemeister since most modern displays do a poor job of upscaling 240p content (if they work with it at all). If you prefer gaming on a CRT, you can get a PVM and then get a SCART to BNC breakout cable to hook into the SCART RGB cable for the Genesis. I've got both a PVM and a Framemeister going. That way I can switch to the PVM at a moment's notice for light gun games for example.

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    Quote Originally Posted by NexusX View Post
    Ya I read that the Composite chip was the problem with RGB jail bars on the model 1. Although I didn't want to dump the time and money into getting native RGB out of my US Genesis. I would be happy with just a clean composite image but that looks like it is not going to be an easy task. But I do have one question... If it is just signal interference from one line to another in close proximity, do you think if I add a bypass wire to extend the space between those lines could that clean up that interference?
    Can anyone add in their opinion on the bypass wire idea? I just hate to go cutting original hardware if it isn't needed.
    Last edited by NexusX; 08-24-2017 at 09:43 AM.

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    Another solution would be to pick up the HD Retrovison component cables. It does a fantastic job and puts out a sharp, clean picture with great color. Perfect for CRT's or modern TV's that can handle a 240p signal.

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    Quote Originally Posted by Mr. Mort View Post
    Another solution would be to pick up the HD Retrovison component cables. It does a fantastic job and puts out a sharp, clean picture with great color. Perfect for CRT's or modern TV's that can handle a 240p signal.
    I have been keeping my eye out for those cables and they are sold out every time.

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    Quote Originally Posted by FBX View Post
    After I went RGB, I simply refuse to go back to that awful composite video standard. It's such a stain that it even tried to mess with my model 1 Genesis, where the CXA was throwing jail bars into the blue line of the RGB output. Turns out it was from composite video processing in the chip that was coupling over into the blue line right next to it. I severed the video trace to pin 6 and it instantly cleared the RGB picture to a perfect image.
    Is there a tutorial on this somewhere?

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    Quote Originally Posted by wyo View Post
    Is there a tutorial on this somewhere?
    all over youtube

    https://www.youtube.com/watch?v=F5jsUZkI-js&t=118s

    But that screws over your Composite image in the process. If you are only doing RGB then its no issue.
    Last edited by NexusX; 08-26-2017 at 09:56 AM.

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    Quote Originally Posted by Mr. Mort View Post
    Another solution would be to pick up the HD Retrovison component cables. It does a fantastic job and puts out a sharp, clean picture with great color. Perfect for CRT's or modern TV's that can handle a 240p signal.
    They are great for CRTs, but be warned on modern displays it is hit or miss how well it works. Most displays that work with it treat the 240p signal as 480i, which causes the graphics to look garbled during movement or animation. There's also the issue of internal upscaling being handled by the display poorly, leaving the picture looking smudgy and lagged.

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    Quote Originally Posted by FBX View Post
    They are great for CRTs, but be warned on modern displays it is hit or miss how well it works. Most displays that work with it treat the 240p signal as 480i, which causes the graphics to look garbled during movement or animation. There's also the issue of internal upscaling being handled by the display poorly, leaving the picture looking smudgy and lagged.
    Agreed. I believe HD Retrovision has a FAQ on their website to test wether your HDTV supports a 240p signal. If your TV can handle it, it's a relatively inexpensive and simple solution.

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    Quote Originally Posted by NexusX View Post
    Can anyone add in their opinion on the bypass wire idea? I just hate to go cutting original hardware if it isn't needed.
    Well I am gonna try out a bypass wire on the composite chip and see if that fixes the interference. I will post the outcome and pics if it actually works.

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    if you do go the RGB route, there is a seller on ebay that makes the scart cables for pretty much every console. they make one that gets rid of jailbars for the genesis. It works because I bought one of them . then you would need a Scart to Component adapter. then into your CRT/Lcd. its as close to RGB you will get. looks great.

    that would be the cheapest without getting into video scaler $$$.

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