Jr. Pac-Man colors are wrong

bear1

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I am restoring a Jr. Pac-Man upright (a Pac-Man conversion) and the colors of everything are wrong. The red monster looks light green, the blue monster looks red, etc. The problem is not with the monitor, because I connected a different monitor and the colors are still bad. So, I think that there is a problem with the PCB. I looked at all of the chips and they all seem to be in correctly. Or could the PCB be OK and there is some other problem? (The game was modified with a power supply and there are 2 wires going from the PCB to the power supply.) If the problem is with the PCB, does anyone know which chips control the colors and if it is possible to replace these chips only, without buying a new PCB? Thanks.
 
That's interesting, I have a similar problem with a Jr. Pac-Man board that I got recently and put on the test bench last night. I fixed a video sync issue on it, but now that I have clear video I can see that all the colours are slightly off. The maze is the wrong colour and the orange ghost is red. I haven't had time to look into it yet, but I'm going to start by checking the resistors R13-R18, R33 & R34 then the colour PROMs at 9E and 9F.

In your case, since the colours are completely wrong, I would start by simply checking the wiring in the video harness. Make sure "Green" on the PCB goes to the "Green" input of the monitor, "Red" to the "Red" input, etc.
 
pinout for the monitor

Most monitors(g07) for pacman pinout would be strarting from the bottom pin wire red green blue black then the white wire connected to the last two pins together. Hope this helps. Wisenheimr
 
Just a quick follow up.. the OP confirmed via PM that it was in fact the wires in the video harness switched around that caused the problem.

On my board, both colour PROMs were bad. (both had outputs stuck high) I replaced them and the video looks good now.
 
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