Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: nipsmg on January 07, 2013, 08:24:25 am
-
Here's the situation:
I have a Golden Tee Complete boardset (green), along with a Jrok RGB -> TV board (ver 4.1, with component) and a Jrok SYNC Cleaner. (Apparently the Golden Tee boards have some funky sync timings)
Symptoms:
TV in my arcade cabinet: (Unable to get into any menus)
- Svideo connection
- vertically rolling picture (would be stable if not rolling).
- Picture is off to the right.
Other 27" JVC TV: (can get into menus, no controls for picture position)
- svideo connection
- Stable picture.
- Picture is off to the right.
Ideally, I'd love to NOT change out the TV in the cabinet if i can help it in any way, but I will if need be.
My issue is the image being off to the right. It's actually cut off on the right hand side.
I thought I read somewhere that putting a resistor (0.85uf?!) in line with the sync will "pull" the picture off to the left, however I've lost that link and I can't find it, and I don't want to do anything that could potentially damage the board / RGB encoder.
Any ideas how to re-adjust the position of the picture and/or fix the vertical rolling on the TV in the cabinet?
I appreciate any help you guys can give me.
-
I had an issue using a converter from Golden Tee's default medium resolution to VGA. Total shot-in-the-dark, but have you tried switching the Golden Tee's dips over to standard res outputs and see if it will sync that way?
My problem was wacky colors and a very soft/unfocused image. When I put the board in standard res, the issue cleared up.
I'm not familiar with the JROK setup, I was using one off eBay that is commonly referred to as the Yaton adapter (he's the seller but not manufacturer).
-
JROk's adapter requires STD resolution to begin with, so I've got nothing to try there.
-
golden tee outputs something OTHER than standard resolutions.
resolution: 640x350
h-frequency: 25.7KHz
v-frequency: 60.6hz
pixel clock: 21.5khz
it's the 25.7khz that's the kicker.
the cga/ega frequencies the converter can handle are
14.5 - 16.5khz -which is cga
23.5 - 25.5khz -which is ega
30.5 - 32.5khz -which is vga
as you can see, the frequency falls just outside into the space between ega and vga
-
which I'm assuming is why the picture is off horizontally a bit. Still searching for a solution.
-
He's quoting the medium resolution outputs, but you said you're running the board in standard resolution. <?>
If that horizontal frequency is what you think is causing your issue, you don't have your GT board running in CGA.
-
The board is running in CGA.
There is a DIP-Switch on the board that switches between std and med res.
I missed that lilShawn was listing the med-res sync timings. However, I'm wondering if there's a similar issue with Std. resolution output as well, maybe it outputs 16.7 or something?