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Chassis problem
Question from Ken: Hi guys! I have an issue with a Soul Calibur 2 game with a U5000 chassis that I was hoping you could help me solve. I bought the game playing blind and sent the chassis off for repair. When I got it back, I hooked it up and the picture went out immediately after turning it on. So I send it off for repair again. This time the repair man couldn’t fix it and sent me a k7400 chassis to put in instead. So I hook up the k7400 and it works for 5 min and goes out while I’m trying to adjust the contrast. Now when I turn it on, it sounds like it comes on but doesn’t display any picture. The game can be switched between standard resolution and high resolution. I thought this might have been the reason the chassis went out the first time I got it repaired but now that it is set to standard res the k7400 still went out also. I was hoping you might know what the problem is or could be. Thanks for your time. Ken from Killeen, TX
Update: I have plugged the monitor into a different cab (Mortal Kombat 2) which also uses a K7400 and the monitor works fine. Now I’m thinking the problem is due to faulty wiring or a bad power supply. I checked the wiring and everything seems fine. Also I checked the AC and DC voltage on the power supply which checked out fine. I’m still not sure what could be causing the monitor to go out in the Soul Calibur cab. I’ve tried several different game PCBs in the Soul Calibur cab with the same monitor shut down result so I’m confused as to what could be causing this problem. Thanks in advance. Take care.
1 answer
Response from Jonathan: Ken,
Definitely sounds like some sort of monitor voltage issue in your cabinet. Make sure you are checking the AC power going to the monitor (we usually check this at the molex connector where the monitor chassis power attaches to the cabinet) and the DC power on the monitor chassis. Many cabinets do not use the switching power supply to get power to the monitor so checking the voltage there might not give you a true reading of the voltage getting to your monitor. Make sure you trace down the origin point of the monitor power wires and that there is nothing on the line that maybe causing issues (like a bad AC filter, cuts/damage to the wires, etc.).
If you continue to have problems, you might try creating a wall plug with a molex connector on the end so you can plug the monitor directly into the wall. This would bypass the cabinet power wiring and give you a good idea if the problem is actually in your cabinet.
Hope that helps. Thank you for your question and good luck with your repair.
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