CRT to LCD -> Daytona USA (Sega 1994)

Stack15

Member
Joined
Jul 8, 2012
Messages
55
Reaction score
0
Location
Macon, Georgia
Well I'm just about ready to start cutting cables, connecting a new video card, testing the LCD hookup, removing the old monitors and mounting the LCDs and bezels.

I have a friend that is going to help me with removing the montiors (so I don't shock/kill myself).

My question is -> How do I wire in the new video card? Please see the pictures. The old video input has the following wire colors: red, green, blue, white and blue/white striped.

The new video card has: red, green, blue, gray, yellow, black.

The new video card is marked HD 9800 V5.0 20120218. I can't find any info on it online. It appears to be made in Taiwan and did not come with instructions.

This is what I'm thinking on the wires. Please provide your own thoughts:

Daytona = converter
red = red
green = green
blue = blue
white = black
blstripe = yellow and grey twisted together

Also, if I hook this up wrong, is it going to break anything? Or can I just keep trying to place the non-RGB wires until I find the right combonation?

Thanks!
 

Attachments

  • Old Video Card.jpg
    Old Video Card.jpg
    51.6 KB · Views: 140
  • new video card.JPG
    new video card.JPG
    90.6 KB · Views: 130
  • Old Video Connector.jpg
    Old Video Connector.jpg
    50.7 KB · Views: 124
  • new video connector.jpg
    new video connector.jpg
    37.2 KB · Views: 122
Original monitor

Look up your original monitor manual.
It probably is r,g,b, a ground and sync.

Most new monitors have composite sync.
 
Thanks! I was just reading that. I am in complete agreement... R, B, G, ground and sync. It appears the new card goes R, B, G, sync (horz & vert) and ground.
 
I thought I may get a jump start and go ahead and tie one of the cards into the power line in the game. So I found the power supply (it's below the pedals) but I certainly don't see where I'd tie in the DC 5V cable. I see the ground terminals. Actually there is stuff grounded all over the game.

Question: Shouldn't the old video card have DC 5V going to it? Therefore, shouldn't I be able to find that wire and tap the new video card in there instead of in at the power supply?

It would also stand to reason that if the old card has DC 5V then it must also have a ground. So I should be able to tap into that same ground wire... right?
 

Attachments

  • power supply.jpg
    power supply.jpg
    51.7 KB · Views: 87
In most arcade games, the monitor runs off of 110 ac, it doesn't have 5 volts going to it. The 5 volts goes to the 'video card' that's the game pcb, not the monitor's pcb.
 
I'm trying to figure out if there is a DC 5V wire going to the card in the first picture that I could splice and put on the replacement card in the second picture. Same thing with ground.

I think they are video cards... I am not positive... they do video things :)
 

Attachments

  • Old Video Card.jpg
    Old Video Card.jpg
    51.6 KB · Views: 72
  • new video card.JPG
    new video card.JPG
    90.6 KB · Views: 75
On most segas of this era yes but plz verify with a meter first.

Rgb, thats self explanatory. Blue/wht and wht.. One is sync, the other is video ground and i have no idea which is which anymore. THinking back, i want to say wht is video ground and blue wht is composite sync... but again its been awhile.

THe "old video card" is actually called a monitor chassis. DOnt trash it, somebody here will likely want your old monitors tube and or chassis. Those medium res monitors are worth fixing to guys like me.


Your new video adapter should have come with a manual to tell you what wires are which. If not, here you go. Im assuming you have this one:

http://www.jammaboards.com/arcade_manuals/GBS-8220_CGA_to_VGA_HD-Converter.pdf

according to manual gray wire is h sync, yellow is vsync, video ground is black.

SO, likely you will be connecting both yellow and gray togther, and connecting those to the blue/wht of the game. Black of the adapter would go to the wht of the game. (assuming memory serves me correctly) SO yes, i believe you are correct in your post earlier.
 
Last edited:
Yup, what cadillacman said.

Here's how your Daytona works:

It has a power supply, that sends 5 volts over to the game logic board, which also has a video section that creates the video signal. It's then sent to the display, which your first picture is part of (the display... monitor chassis).

What you're doing now is, sending the power to the game logic board, which also has a video section that creates the video signal. Then instead of sending that signal to the display, you're first sending it to yet another video pcb that will convert it's resolution. Then you'll send it to your new display (the LCD screen).

So you're not replacing the video card that runs off 5volts, it's on the main game pcb. You're adding an extra video card in, the guts you show in the first picture would be the equivalent of the guts that are inside your LCD monitor.
 
Tomorrow is the big day! I feel like I have a kid going to surgery or something. I'm going with the Vizio Razors for new monitors. They seem to be the only 26" TVs that are slim enough to go in and have auto on.

I have a friend coming at 4pm to help me. Wish us luck please! If this works, it's going to be awesome.
 

Attachments

  • ready.jpg
    ready.jpg
    38.6 KB · Views: 79
It isn't working. The screen pops up on the LCD but it is WAY too white (white where it should be black). And it is off center.

I can't get it into English on the menu.
 
There is power to the card and I have a picture on the LCD. It looks terrible and I am sad. There are odd horizontal lines and a lot of the colors are off.

The solution seems to be within some weird clamp sp and clamp st options in the card's menu. Has anyone dealt with this? I have been at it for awhile now.
 
Well, I'm giving up for the evening. Four people are now stumped on this. The only thing remaining is to try a computer monitor instead of a LCD TV.

I am currently trying a Vizio Razor and I tried a 2011 model Samsung.
 
Sorry it is not working. Anyway you can share some pics how u got the lcds in there and how it looks. I want to upgrade my daytona soon also.
 
For accuracy, call the new "video card" a converter, it only converts the signal, doesn't create a picture.

From reading the converter instructions, you may need to get into the converters menu to try some options to change the colors.

I want to know the story on the original tube monitors!
How come your pulling them? Model?
Can you take a picture of the chassis boards on them? Would you sell the chassis's?
 
Back
Top Bottom