Rolling screen*****update!!*****

[Nemss316]

Hey guys,

I got my JPac and Soft15 running on my PC. I hooked it up to my arcade cabinet, and my monitor displays the image upside down, and the screen does a constant roll. Is there something I missed in my setup for this issue? I've double checked my connections to the JPac, and to the PC, but am still getting the same issue.

I searched for the answers, but couldnt find anything, any ideas?? Thanks.

[Kevin Mullins]

What monitor?

[Nemss316]

Its a Wells Gardner, 19K7602.

[northerngames]

do you have V on H and H on V perhaps you have them crossed?

if not they may need to be connected together to make composite sync as that is jamma standard I believe.

[Nemss316]

I'm not sure. What I did yesterday was remove the Power Supply, and the Jamma Board, hooked up the J-Pac, and connected everything to the PC. I did not mess w/ any of the wires coming from the monitor, just unhooked the ones plugged into the power supply, and hooked up the JPac.

I double checked the monitor before I took the Jamma board, and the Power Supply out, and everything worked fine.

[Kevin Mullins]

Just like swapping out any JAMMA board.... you may have to actually adjust the monitor itself a bit.

For the rolling you may have to adjust the horizontal hold or horizontal freq./shift.

For the upside down, you may have to yoke flip it.
http://www.therealbobroberts.net/yoke.html

[Nemss316]

I'm assuming your talking about the two knobs on the back of the monitor for the rolling screen? As for the yoke flip, I'm pretty nervous about messing w/ the monitor at all. Is there a step-by-step process that I can use for this?

[Nemss316]

Upon doing some research today here at work, it looks like someone else had a similar problem. They realized they did not have the keyboard plugged into the JPac, and I know when I tested mine out last night, I did not either. I will try this when I get home, and to be on the safe side, I'm going to delete my drivers, and uninstall Soft 15Khz, and will reload the drivers, and the Soft15, and see if this takes care of the issue.

[Nemss316]

Ok, so I got the upside down screen issue resolved, but now I am still getting the rolling screen issue. I see the two knobs on the back of the monitor, I'm assuming you can adjust those for the rolling screen issue?  Are they safe to touch? Also, I noticed when Windows boots, no issues, and the color is where it should be, but when Mala boots, the screen is a lot darker. I'm assuming this is a resolution issue w/ Mala?

[Kevin Mullins]

Sounds like the two knobs you are looking at are on the flyback which are the SCREEN and FOCUS. (they should be marked on the casing)

You need to look elsewhere on the chassis.
Does yours have a remote board? (small board with lots of knobs)(some have it,some don't)

Better yet .... look in the manual on that monitor.
http://arcarc.xmission.com/PDF_Monitors/Wells%20Gardner%20K7000%20Manual.pdf

[Nemss316]

I found the other knobs on the board, they are below, and look like a flat head screwdriver will adjust them. I am on my way home now, and will take photos of the board.

Appreciate the help!

[northerngames]

yep you need to adjust the V-hold pot more then likely possibly the H hold also but usually it is just the V needed to adjust.

[Nemss316]

Ok, two problems down, one to go. I was able to get the screen to stop rolling once I put the resolution to 640X480. But, a few new probs. arose:

1. Some games are displaying fine in Mala, but some are still suffering from rolling screen syndrome. Do I have to change the mame config to display the resolution in 640X480?

2. Even though the games load, they don't play "smooth". They seem to have a kind of jitterness to them. How do I adjust that?

3. Windows is still not centered on the screen correctly. I'm assuming I need to mess w/ the Vertical and Horizontal knobs on the back of the monitor.

4. The screen is rather dark. Another issue that I need to adjust on the monitor.

Again, sorry for all the questions, but I've been tearing at this for days, and I'm hosting a party this weekend, and would really like to surprise people, when they walk in and see this cabinet up and running!

[Kevin Mullins]

Lower the resolution some more. That monitor is not designed to run 640x480.
(like 640x200 or so)

Should be able to adjust the brightness directly on the monitor itself.
There is a regular knob (potentiometer) for brightness and contrast, but IF you need to you could bump the SCREEN voltage up a tad on the flyback. (one of the original knobs you were looking at)
Try the onboard controls first.

Not sure what you're describing as far as your "jitterness" issue.
Does it lag, like hurky jerky?
That could be PC related.

Centering the image is adjustable as well.
Look for the Horizontal Raster Position and the Vertical Raster Position adjustments.
Horizontal is a jumper that you move from one pin to another. (Left, Center, Right)
Vertical is a potentiometer. (knob)

[Nemss316]

Its nothing PC related, I think its relating to the problem that you said before: the screen needs to be adjusted for 640x200. I'm going to adjust it when I get home from class tonight, and see if that makes the difference.

I know that messing around on the monitor is never easy. I'm pretty leery about even getting close to the back of the monitor. If I need to adjust those buttons, should the monitor be discharged first? Or is it safe to touch them, or use a set of pliers to move the knobs?

[Kevin Mullins]

If the potentiometers have an actual plastic knob, then you can just turn them with your fingers.
If they are the slim metal kind, preferably you should use a set of plastic screwdrivers.
Radio shack used to sell a $5.00 "TV Tuning" set. (haven't looked for them in awhile)
I've used a small metal jewelers screwdriver set in the past, but not recommended.

No need to discharge the monitor, heck you actually want it ON so you can see what's going happening when you adjust.
Just stay clear of the thick anode lead going to the "suction cup" on the tube.
And I generally make it a rule not to touch anything metal while my hands are inside.
Your body has to complete the circuit in order to get zapped.

[Nemss316]

Exactly! I dont want to get zapped, thats for sure. I'll check it at home tonight, and lower the resolution to see if that helps, and I will pick up a set of plastic screwdrivers tomorrow if need be. So you said to check the V Pots first, I'll start there.

[northerngames]

your desktop should be set for 640X480 it will be jittery that is normal for 640X480 but that res should be used for the desktop setting.

if your screen is off center then you need to adjust H. size V.size until it all fits on the screen then use the H.pos V.pos to adjust the screen so it is all centered good on all 4 side's.

then go back and redo your v. size and H. size to evenly fill the screen when done it should be evenly filled and dead center.

now if your running soft15K with mame then you need to go to the ultimarc site and download the auto res tool if you want to get the real use for soft15K if your not running the tool then all your games are running 640X480 wich will all be jittery and none will look even close to right.

all your mame settings should also be set like your using a arcade vga if they are not they still will not display correctly even if the tool is used.

so DL the tool and install it and also set your mame setting's the same as if you were using the arcadevga if you want the real authentic look.

[Nemss316]

Yep, jittery is the exact word to describe how my games are running. I'll download the auto res. The desktop and MALA are both running 640X480. So I'll go home tonight and hopefully get this monitor good to go. Thanks a lot for the help, I really appreciate it.