New Project: Tetris Cabaret
- Thread starter Phetishboy
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Phetishboy
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Did some reconfiguring on my adapter and tried the K4800 again. Colors are a little suspect and no matter what I do I cannot get the image to Center in the screen. The right side is cut off no matter where I place the centering pins or where I dial in the H hold/frequency/position. I give up. This game is cursed.
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Phetishboy
Well-known member
Hey man, you're not even paying attention. I'm trying four different monitors. I'm calling them out as I'm trying them. Each one has a different issue.
Mattspad
Well-known member
If you cannot get the green color with any monitor for this game you likely have game pcb issues then. Bro I cannot keep up with what you're trying but usually preamp transistors cause the symptoms you're having if you know the game pcb is outputting all colors. You're trying to fix this in a weird way, not normal to swap 4 monitors so forgive me not being able to keep up
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Phetishboy
Well-known member
The monitor I started with is a 13" Kortek. It has color issues. I tried swapping the green and the blue gain pots, and I still can't get the green to properly adjust. I then tried a K7203, I couldn't get the picture dialed in quite right and then I accidentally shorted something and now I've got vertical collapse. I then tried a 13" Tatung, but the image is way too big and distorted. Now I found that it might be a VGA monitor rather than a CGA monitor. I then tried my WG K4800. At first it was going into shut down. I have alleviated that issue, but now I cannot get the image centered or to properly sync. It has a giant bow on the right side. I also feel like I can't get the colors dialed in even though all three colors, red, green and blue work fine. At this point I feel like this game is cursed.
Mattspad
Well-known member
Well sounds like you struck out on 3 monitors. The 4800 might be your best bet. Has this monitor had any work done like a cap kit? Not familiar with 4800's myself seems like they're real rare. Maybe it just needs a cap kit but I literally have no idea. Do you know what signal the game is outputting? Also what monitor came with the game?
jimbodeanny
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Hey Shawn,
I've been skimming through these 25 pages, trying to find out if you've ever had a full color picture in this cabinet. Just from the very quick perusing I did, from what I've gathered...
1) You've clearly tried multiple monitors all with some issue
2) You've tried multiple PCBs (Tetris, Columns, 19in1, etc)
Maybe I missed something else, but to me, this sure sounds like it could be something as simple as wiring. In terms of the green issue, if you have a wiring problem with the green, you'll still get the symptoms you have as cranking the green cutoff will still produce full green on the monitor, just not for the game signal. We can rule out a board issue since you've tried several, as well as it being solely a monitor issue since you've now tried four. My money is on it being somewhere in the wiring - hopefully something really easy and simple.
P.S. 4800s are nice monitors. I've most commonly seen them in Baby Pac-man
I've been skimming through these 25 pages, trying to find out if you've ever had a full color picture in this cabinet. Just from the very quick perusing I did, from what I've gathered...
1) You've clearly tried multiple monitors all with some issue
2) You've tried multiple PCBs (Tetris, Columns, 19in1, etc)
Maybe I missed something else, but to me, this sure sounds like it could be something as simple as wiring. In terms of the green issue, if you have a wiring problem with the green, you'll still get the symptoms you have as cranking the green cutoff will still produce full green on the monitor, just not for the game signal. We can rule out a board issue since you've tried several, as well as it being solely a monitor issue since you've now tried four. My money is on it being somewhere in the wiring - hopefully something really easy and simple.
P.S. 4800s are nice monitors. I've most commonly seen them in Baby Pac-man
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Phetishboy
Well-known member
Yeah, I wish. Everything's wired correctly. I've checked it 15 times.
Mattspad
Well-known member
I think you're right. If he's tested all that stuff the only thing it can be is the wiring harness. Take your multimeter and with the game pcb connected check if you have continuity going from the edge connector of the game pcb to the green pin in the monitor video cable. Must be a bad connection. Could be a bad crimp or pin in the edge connector
WadeLanham
Well-known member
That seems to be missing green too. Any chance the green pin in your jamma harness is messed up? Just seems suspicious that the green is out on another monitor.
WadeLanham
Well-known member
S
Agreed, something else us up, like a bad green in the harness. I'm not seeing green in several different monitor pics.
mikenes75513
Well-known member
I have had corrosion on the corresponing position in the card connector cause me to loose a color.
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Phetishboy
Well-known member
I will humor you fuckers, and take pictures of every inch of the green circuit from edge connector to monitor. The wiring harness is new, I've checked the edge connector over several times and the green wire is exactly where it's supposed to be. The pin is brand new, and the green runs from the edge connector straight up to the monitor green pin. I'm really not sure where there could be an issue unless there's possibly a break in the wire? But the fact is there is no break in the wire. I've also tried four different PCBs and they all do the same thing. But I've also tried four different monitors and they seem to all do the same thing. I will figure it out, just might take me some time.
WadeLanham
Well-known member
I'm thinking it's a bad crimp or broken green wire inside the insulation, if it's all good visually. Can you slide a wire up under the green on the game pcb side and then slip it into the top of the molex on the monitor, to totally bypass your jamma harness?
There are other ways, but this would involve the least amount of moving monitors and games around
There are other ways, but this would involve the least amount of moving monitors and games around
chilibear13
Well-known member
Without reading all 25 pages...
Easiest way to check the wire harness to see if the green pin is good or bad, plug in game board and meter it from game board to chassis.
Hard to tell from the pictures, but it does look like players start at the top of Tetris screen is white. If it is white, I'm guessing your problem is your video ground. You can try adding/splicing a wire from the video ground to say the ground on the power supply.
Easiest way to check the wire harness to see if the green pin is good or bad, plug in game board and meter it from game board to chassis.
Hard to tell from the pictures, but it does look like players start at the top of Tetris screen is white. If it is white, I'm guessing your problem is your video ground. You can try adding/splicing a wire from the video ground to say the ground on the power supply.
Mattspad
Well-known member
The fact the harness new is actually suspicious because we have no idea if it ever worked. It's gotta be a bad connection or missed connection. Meter everything from the fingers on the game pcb to the pins in the monitor chassis with everything connected like chili and I suggested earlier. It's the only explanation
I'll jump in and also say that dark or missing colors has been a continuity issue for me in the past. I had a header on a chassis that was very tarnished so the picture looked incredibly dark. If I did a continuity test from the edge of the game PCB to the top of the input header on the chassis it was fine, but checking the underside it had no continuity:
Not exactly what's happening here, but maybe helpful.
K7000 No colors
Have been working on a troubled K7000. Was proud to have come this far without help, but here we are. Just to recap: Ran through @zenomorp 's standard test suite. Found several issues. Blown Fuse Blown HOT Open R91 Broken Contrast POT Repaired outstanding issues, passed lightbulb test...
forums.arcade-museum.com
Not exactly what's happening here, but maybe helpful.
chilibear13
Well-known member
I don't think that would be the case here since he has changed 3 or 4 different monitors.
I'm speaking to more of the harness or possible connection issue; just spitballing.
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Phetishboy
Well-known member
Turned on the 4800 before work. Turned up both the green gain and green cut off, both work fine. It does seem to put a little bit too much green or not enough green just like the other ones. Plus once I get the image centered Horizontally, it starts to bow super bad.
