Author Topic: Electorhome Go7 (Read 2904 times)

Wolfman08 · « **on:** September 03, 2009, 11:04:21 pm »

I have replaced the transformer (StarGate) and the machine came on and stayed on no problem then I turned it off plugged the monitor in with a replaced fuse that had to be soldered in for the monitor and as soon as I turned the machine back on it blew the transformer fuse. Another thing that's funny is when the monitor isn't plugged in the transformer box you have to turn on the machine to get the led lights to come on on the PSB board but when the monitor is plugged in the LED lights on the PSB come on before turning the machine on. Then when the machine is turned on it blows the transformer fuse immediately.

SirPeale · « **Reply #1 on:** September 03, 2009, 11:16:02 pm »

Sounds like you have wiring faults. I'd be scrutinizing everything carefully.

Wolfman08 · « **Reply #2 on:** September 04, 2009, 04:20:33 am »

Can you tell me what I need to be looking for?

SirPeale · « **Reply #3 on:** September 04, 2009, 07:35:48 am »

Anything "wrong." Sorry I can't be more specific.

I'd start by unplugging all the power cables. Then start replacing them one at a time and firing up each time. When the fuse blows, you have your suspect part.

Isolation transformers die very rarely. If your monitor fuse is blowing it's probably because there's a fault with the monitor itself. If the fuse blows when no monitor is connected, then it might be blown.

Kevin Mullins · « **Reply #4 on:** September 04, 2009, 11:29:14 am »

Yeah, was it ever verified that the transformer was bad ?

http://forum.arcadecontrols.com/index.php?topic=95734.0

Does any of the wiring in the cab looked to have been hacked up or spliced, etc?
Does it have the stock Williams PSB or does it have a switcher in it ?

Wolfman08 · « **Reply #5 on:** September 05, 2009, 10:42:04 pm »

stock power supply, and it was tested good the transformer was good. The original transformer was bad that's why I replaced it. without the monitor plugged in the machine comes on shows 3 LED lights on the power board and a "0" on the chip board. when the monitor gets plugged in the transformer the fuse pops in the transformer. I found a new monitor on arcadeshop amusement.com that is suppose to be a replacement of the one I have in stargate for 199$

Kevin Mullins · « **Reply #6 on:** September 06, 2009, 11:44:55 am »

Quote from: Wolfman08 on September 05, 2009, 10:42:04 pm

without the monitor plugged in the machine comes on shows 3 LED lights on the power board and a "0" on the chip board.

Well, that's a good sign....... means the game should play "blind". (no monitor, but plays)

Quote from: Wolfman08 on September 05, 2009, 10:42:04 pm

when the monitor gets plugged in the transformer the fuse pops in the transformer.

So it's blowing a fuse on the main fuse block next to the transformer and service outlet ?
Does the marquee light work correctly ?

Quote from: Wolfman08 on September 05, 2009, 10:42:04 pm

I found a new monitor on arcadeshop amusement.com that is suppose to be a replacement of the one I have in stargate for 199$

I'd be more apt to repair the original G07 if needed.

Wolfman08 · « **Reply #7 on:** September 06, 2009, 03:42:32 pm »

I don't know if the game is playing i cant see anything and i don't hear anything just the board lights is all Ive gotton and the marquee doesn't light up i don't know if the bulb is burned out or not. The main fuse on the transformer next to the service outlet yes.

Kevin Mullins · « **Reply #8 on:** September 06, 2009, 03:53:23 pm »

Quote from: Wolfman08 on September 06, 2009, 03:42:32 pm

I don't know if the game is playing i cant see anything and i don't hear anything just the board lights is all Ive gotton

Flick the coin switch and see if a game will start. Make sure the volume is turned up.
"Playing blind" means just that..... can start, hear and play a game just can't SEE it.

Quote from: Wolfman08 on September 06, 2009, 03:42:32 pm

and the marquee doesn't light up i don't know if the bulb is burned out or not. The main fuse on the transformer next to the service outlet yes.

When you unplug the "monitor", are you unplugging just the two wire connector right at the monitor or the bigger one with other wires in it closer to the transformer ?

Reason I ask is you have a non-working marquee, could be just a bulb or starter...... BUT a shorted ballast will blow the same fuse.
The marquee and monitor share the same power source.
Something worth checking.

Wolfman08 · « **Reply #9 on:** September 07, 2009, 09:32:29 am »

I changed the bulb in the marquee it now works as for the game I can barley hear sound like I have to put my ear up to the speaker and you can hear it then the volume is all the way up! I tried messing with the coin slot but not sure what I really need to do with that I think the sound board is messed up if volume is all the way up and still cant hear it good I played with the volume control and it just doesn't make that much difference. The only wire I mess with on the monitor is the plug itself that plugs into the transformer I'm not sure what two wire you mean.

Kevin Mullins · « **Reply #10 on:** September 07, 2009, 01:21:53 pm »

Quote from: Wolfman08 on September 07, 2009, 09:32:29 am

I changed the bulb in the marquee it now works

Well, that means the ballast is good.... can eliminate that as a problem.

Quote from: Wolfman08 on September 07, 2009, 09:32:29 am

as for the game I can barley hear sound like I have to put my ear up to the speaker and you can hear it then the volume is all the way up! I tried messing with the coin slot but not sure what I really need to do with that I think the sound board is messed up if volume is all the way up and still cant hear it good I played with the volume control and it just doesn't make that much difference.

Push the test button on the sound board and see what happens.
Make sure the connector for the volume potentiometer is plugged in good.
Test the speaker itself.

Quote from: Wolfman08 on September 07, 2009, 09:32:29 am

The only wire I mess with on the monitor is the plug itself that plugs into the transformer I'm not sure what two wire you mean.

Pretty much like any other monitor of that era.

Wolfman08 · « **Reply #11 on:** September 07, 2009, 02:44:52 pm »

This is what it looks like in the back the 2 wire you were talking about then the other wire is soldered in going to the service outlet for power. The power comes on and the boards come on like the psb and the ROM chip board when you plug the monitor in the service outlet before actually turning on the toggle switch in the back for power on. When the monitor isn't plugged in the service outlet you have to actually turn on the toggle switch to turn on the system.

Kevin Mullins · « **Reply #12 on:** September 07, 2009, 03:52:33 pm »

That monitor requires power from the isolation side of the transformer ONLY.

That cord that is soldered to the chassis and plugged into the service outlet NEEDS TO GO AWAY. It should never have been there in the first place.

SirPeale · « **Reply #13 on:** September 07, 2009, 04:03:17 pm »

Quote from: Kevin Mullins on September 07, 2009, 03:52:33 pm

That monitor requires power from the isolation side of the transformer ONLY.

That cord that is soldered to the chassis and plugged into the service outlet NEEDS TO GO AWAY. It should never have been there in the first place.

It sounds like Kevin and I agree based on what you wrote and the pictures posted. Because of this, there may be additional problems with the monitor.

I am very curious as to why someone would do that to begin with!

Wolfman08 · « **Reply #14 on:** September 08, 2009, 12:27:26 am »

OK well with some more further messing around with the system I got the sound to work by replacing both fuses on the sound board its now loud and clear and the game starts up by flicking the quarter lever 10 times and the button respond to firing and thrust all that good stuff now its just a matter of monitor. I looked into it further and yes someone has soldered a power cord to go from the monitor to the transformer i don't know why either. I think to eliminate all problems with that is to just buy one new from arcade shop amusement.com because im no monitor expert let alone I'm scared to be shocked.

8way · « **Reply #15 on:** September 08, 2009, 02:03:31 am »

Have you tried disconnecting the degauss coil and then turning it on and see if it still blows then fuse?

SirPeale · « **Reply #16 on:** September 08, 2009, 08:53:40 am »

Quote from: Wolfman08 on September 08, 2009, 12:27:26 am

I looked into it further and yes someone has soldered a power cord to go from the monitor to the transformer i don't know why either. I think to eliminate all problems with that is to just buy one new from arcade shop amusement.com because im no monitor expert let alone I'm scared to be shocked.

A new monitor won't solve your WIRING problem. And if you're going to get a new monitor sell/give away the one you have. They don't make them any more, and if everyone that has a monitor problem just puts in a brand new one each time, we're going to go thru the very limited supply very quickly.

And which is it...you said in a post above that someone wired the monitor to the service outlet, but in this post you said it's wired to the transformer.

Wolfman08 · « **Reply #17 on:** September 08, 2009, 10:23:02 am »

The monitor is plugged into the 2 wire coupler as shown in picture 3 and those 2 purple wires go to the transformer, then the wire to the right closest to the tube is soldered in the same place on the board and goes to the service outlet to the transformer that's a regular wall plug in.

Kevin Mullins · « **Reply #18 on:** September 08, 2009, 10:31:53 am »

The purple wire setup is the CORRECT setup.
Unplug the line to the service outlet, cut the cord off and unsolder it or cut it off, get it out of the picture all together.

There are TWO fuses on the monitor chassis itself....... are either of those blown ?

G07's aren't hard to repair, plenty of parts and support available still.
If nothing else, learn how to discharge a crt and pull the chassis and let someone else fix it for you.

Wolfman08 · « **Reply #19 on:** September 08, 2009, 01:02:35 pm »

The fuse right by the power cord was blown I replaced it or re soldered another one in there. I tried it without the power cord and nothing happened so I guess back to square one.

Kevin Mullins · « **Reply #20 on:** September 08, 2009, 01:28:52 pm »

So the bigger fuse on the chassis stayed good after you replaced it ?

How about the little fuse that's hiding behind the big capacitor ?

Does the MAIN fuse by the service outlet still blow now that you've unplugged that jurry rig power cord ?

Have you measured the voltage at the monitor connector coming off the transformer ?
(the two wire purple wired connector)


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