Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: Draco_Elessar on April 24, 2014, 05:25:44 pm
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I got a Wells-Gardner 19K4903 monitor and a bunch of parts recently. I have to idea how they go together or even if they do.
I need too connect the monitor to the isolation transformer, but I am missing the wire harness. There is a two pin cable that is connect to the monitor that has a flag with only connect to isolation transformer on it. The transformer has a 12 pin and two 8 pin cables. Does anyone know which of the transformer cables I need to connect the monitor to? If I can get it powered on is there an easy way to test that the monitor works? I do have a SNk 2 Slot PCB;can I use it to test the monitor without a wire harness?
(https://farm8.staticflickr.com/7397/13524971535_05e70a053e_z.jpg) (https://farm4.staticflickr.com/3734/13525358754_58a83ea3e3_z.jpg)
Is this needed/what is this?
(https://farm8.staticflickr.com/7246/13525265844_d407802b29_z.jpg)
Thanks,
Draco
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that thing in the bottom pic with the cooling tines on it is a power supply but for a pcb, not the monitor.
that big square block might be an ioslation transformer but its hard to say with all the wires piled all around it. if it only has the plugs you describe coming off it, its not an an iso transformer, but just part of the power supply on the bottom pic.
the monitor has to be plugged into the isolation transformer, usually with a small rectangular 2 wire plug and should be coming directly off the isolation transformer.
the only way to test it is to have a proper working power supply, isolation transformer and wiring harness to connect the pcb and the video up to the monitor.
all that power stuff is an older linear power supply that is most likely for a specific game.
easier to find a local friend with a jamma game that has a wg monitor in it and hook it up. the WG monitors like k4900, k4600 and k7000 use the same video hookup.
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that thing in the bottom pic with the cooling tines on it is a power supply but for a pcb, not the monitor.
that big square block might be an ioslation transformer but its hard to say with all the wires piled all around it. if it only has the plugs you describe coming off it, its not an an iso transformer, but just part of the power supply on the bottom pic.
the monitor has to be plugged into the isolation transformer, usually with a small rectangular 2 wire plug and should be coming directly off the isolation transformer.
the only way to test it is to have a proper working power supply, isolation transformer and wiring harness to connect the pcb and the video up to the monitor.
all that power stuff is an older linear power supply that is most likely for a specific game.
easier to find a local friend with a jamma game that has a wg monitor in it and hook it up. the WG monitors like k4900, k4600 and k7000 use the same video hookup.
Thanks for the help. When I get home I can take more picture of the possible isolation transformer. If it is one do you know which of the colored cables, from the isolation transformer, goes to the monitor?
The guy I bout it from said it came out of an NeoGeo cabinet.
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I'm no neo geo expert but its my understanding they are just a variation on a jamma setup that used switching power supplies. that looks like it came out of a cab that was converted to a neo geo and they just left the old hardware in it. That probably is an isolation transformer. if it has 4 prongs on one side, like two on the bottom and two on the top then it probably is. the two wires on the bottom should be going to a power source and the two top would go to the monitor.
in these two pics, the first one is a couple of isolation transformers. one brand new and one really old. the old one has tabs for different voltages.
the 2nd pic is the transformer wired into a switching power supply setup in a standard setup.
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I'm no neo geo expert but its my understanding they are just a variation on a jamma setup that used switching power supplies. that looks like it came out of a cab that was converted to a neo geo and they just left the old hardware in it. That probably is an isolation transformer. if it has 4 prongs on one side, like two on the bottom and two on the top then it probably is. the two wires on the bottom should be going to a power source and the two top would go to the monitor.
in these two pics, the first one is a couple of isolation transformers. one brand new and one really old. the old one has tabs for different voltages.
the 2nd pic is the transformer wired into a switching power supply setup in a standard setup.
It does look like the top picture, sort of. Here are some more images. Looking at the transformer would I use cables 5 and 8 or 9 through 14? Is there a right side or wrong side to the transformer? Since the input is on the bottom.
Thank you for the help!
(https://farm8.staticflickr.com/7393/14136769172_b93e46637e_z.jpg)
(https://farm6.staticflickr.com/5160/14136367731_2096819137_z.jpg)
(https://farm8.staticflickr.com/7307/14139710085_793ae5d8d1_z.jpg)
(https://farm8.staticflickr.com/7403/14159769953_813bc7ae3c_z.jpg)
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ok, that is not an isolation transformer. what you have is the power supply for a williams game like joust or robotron. I have one exactly like that I pulled out of my converted joust. It didn't click at first cause I yanked it out and put it in a box.
basically none of that will help you with that monitor, and at this point there is no easy way for you to test it.
where are you located?
easiest thing to do if you want to pay for shipping is I can test the chassis for you. I have 5 k4900 monitors that all work and a spare chassis. that's the important part anyway, most likely the tube itself is just fine or if its not, there's nothing you can do about it anyway. I can help you disconnect it from the monitor and tell you how to pack it.
Im not a monitor expert like Ken Layton, but I can do some basic stuff like cap kits and simple repairs.
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ok, that is not an isolation transformer. what you have is the power supply for a williams game like joust or robotron. I have one exactly like that I pulled out of my converted joust. It didn't click at first cause I yanked it out and put it in a box.
basically none of that will help you with that monitor, and at this point there is no easy way for you to test it.
where are you located?
easiest thing to do if you want to pay for shipping is I can test the chassis for you. I have 5 k4900 monitors that all work and a spare chassis. that's the important part anyway, most likely the tube itself is just fine or if its not, there's nothing you can do about it anyway. I can help you disconnect it from the monitor and tell you how to pack it.
Im not a monitor expert like Ken Layton, but I can do some basic stuff like cap kits and simple repairs.
Thanks for the offer and the help, but I'm just trying to sell the monitor and wanted to prove that it worked.