Monitor is yellow

newkid3

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Hello all, I have a draw poker that the cards where light purple. We changed the video chip C5346A at location 036 thinking that might have been the problem. after that the whole screen is yellow. We put a socket and a new chip in there. You can see the cards white and 25 cent. I will try to put a pic up. Does anyone know what this could be? Thanks
 

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you should list what model of chassis you have so people can help.
 
Anyone have any idea what would cause this yellow screen. I have the game working great now except being able to read the cards.
 
baritonomarc thanks, when we did as you ask the screen comes up whitish
 
I have another working pcb. It does the same thing. Screen is yellow with white cards. Any other ideas that could cause this?
 
I wish i new what courage to give it to get it working. It is driving me crazy.
 
baritonomarc, are you thinking the monitor itself is working right? So it would have to do with input maybe?
 
What happens if you turn down the screen pot on the flyback, or the brightness control on the remote board?
 
If turn down the screen it is still yellow just a darker picture.
 
Maybe this will help, I found this on a different forum. "The only problem I've had with the 1492 pcb (in 3+ years) was with 3 of them. And that was cold soilder joints on the socket that goes on the back of the picture tube.
Symtoms were the tube would be yellow and grey. Or not light up at all.
If you can get the picture to work by moving the socket on the back of the tube, chances are it is a cold soilder joint. "
 
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if you turn the screen up and it's white with no signal plugged in, then it's probably a signal header problem. you're not getting blue. the signal headers take a lot of abuse from plugging/unplugging and the solder joints will crack.

look at pin 3, if you see a dark ring around the pin it's cracked, you will need to reflow the pin. you can add solder to all of these pins, just make sure you don't bridge them. do this and see what you get.
 
I have tried everything posted here. It was still just like the pic i posted after doing all of that. Later on i was just trying the other board i have and now with any board the colors have switched. All the screen is white and the cards are yellow. I just dont know.
 
This is what it looks like now.
 

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If you have white, all your colors are there; if the raster is white with no video signal, you have not a dominant color. This means that your video amplification circuit is ok. Being a colors problem, i would tend to rule out the monitor as the cause of the issue. Keep in mind, anyway, that the problem rised after you operated on the chassis...
If only by swapping your pcb's you have a drammatic colors change, i would think that your issue is in the pcbs or the connection with the monitor. Check the (jamma?) harness for shorts between colors and the rgb connector on the chassis.
 
Ok. We hooked the monitor to working sit down slot machine. It is definitely the monitor. It came up with funky colors. Any idea what on the monitor could have went wrong?
 
did you reflow the signal header? if so, did you bridge red and green? it's actually pretty easy to do this. if you were to do this, you would have both signals coming off the board for red and green firing on red and green on the monitor at the same time.
 
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