Monitor Replacement, Please Help

thefader

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Hey guys, I am very new to this and I need some help.


I have an early Taito cabinet that I am trying to rebuild for a multi jamma board. The monitor currently in it has very bad burn in, so I want to replace it. Ive found replacement 19" monitors on ebay but before I buy it I need to make sure I can hook it up.

My current monitor has an Iso transformer, and these new monitors say they dont require one.

Can I hook it up through the Iso anyway?
If I dont, can/how do I remove the old messy Iso transformer?
How many cables need to be connected to the monitor? The power cord from the Iso transformer, the 5 video cables from the Jamma, and anything else?
Is there anything else I'm forgetting?
How easy is it to do this monitor swap?
 
you can hook it up through the iso anyway, yes, it won't hurt it, it'll actually be better I think.

the only cabling (aside from whatever is part of the actual monitor itself: the yoke, neckboard and deflection board) that plugs in is the AC power connector (which depending on what kind of monitor you replace the old one with may require adapting to the new monitor power plug) and the video signal harness (RGB, Sync, Ground).

the monitor swap itself is 4 nuts and some grunt work to remove the old one, which I'll assume is just a 19", so it won't be bad.

otherwise your alternative is a tube swap, which can get messy and ridiculous. I'd hang onto the old monitor, you should never toss em out, especially if it works fine but has burn-in.

good luck sir.
 
Definitely leave the isolation transformer. It won't hurt anything, and it'll power the new monitor just fine, and should the monitor ever have to be swapped in the future, it'll be there. Hooking up a monitor is really simple, and the bolt spacing on the frame is standard, so a new monitor should bolt right in, and be straightforward to hook up. Might have to splice some wires, but nothing serious.

Don't throw out your burned monitor. There are lots of us that repair them.

-Ian
 
These are the monitors I found. http://cgi.ebay.com/ws/eBayISAPI.dl...f15191c&itemid=170486638624&ff4=263602_263622

I got a JAMMA arcade machine for 100$, Jamma Harness for 30, overlay for 25, and got new buttons, joysticks, wood for the CP, and a piece of Lexan.

Which wires might need splicing? I know I can figure out the RBG, ground and Video Sync to the monitor, but the power wires are all that scares me.
 
I doubt that you will need to splice any wires, but you may need to change out connectors.

The AC (power) wiring in your cab is usually run through a 2 position Molex connector with large pins in it. The RGB and sync wires are usually in two smaller Molex connectors, one 6 pin and one three. The larger connector is most likely a three position on the new monitor and the connector will need to be swapped. The smaller connectors shouldn't need any modification.

There should also be a cabinet ground connected to your current monitor frame. This should be connected to the replacement monitor as well.
 
I checked the only wires going to the monitor are the power wires through a white connecter, and the RBG video wires are all just linked with Quick Connects, there is a thick wire with a 6 pin Molex connecter coming out of the coin manifold with a C on it. What is this used for? Also, there are no wires going to the power supply at the -5v pin, what are these used for, and why are they not being used on my game currently?

Thanks guys, I really appriciate your help.
 
All cabinets are wired differently. Your new monitor will be simple to connect. Just hook up R, G, B, and sync. The monitor's power is isolated 120vAC from the isolation transformer. You'll just have to change the connector on either the monitor or the game's harness to hook up the new monitor. If it's a brand new monitor, it might even come with a cable with a mating connector. If so, just cut the harness in the game, and splice in the new one. It's isolated AC, so you don't have to worry about mixing up hot and neutral.

The plug coming from the coin door probably mates with something in the original harness, to wire up the coin switches, coin counter (if present), and the coin door lights. If you replaced the harness, you'll need to hook up the coin switches and stuff again.

The -5v line isn't used by a lot of games, so it's not always hooked up. If your power supply has a -5v output, just hook it up.

-Ian
 
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