A little rookie help with measure b+ G07

[MonsterBash]

Edit to add.. I'm a moron..continue reading and you'll find out why

So I'm at Bob Roberts page and looking through his G07 writeup, I just installed a switcher and being i have 165V at the switcher..I wanna make sure I don't fry the monitor as that seems a little high

Here's what he says about the voltage

To adjust the B+ for 120 VDC you will need to clip your ground lead of your meter to the metal frame anywhere, and the red lead to the end of R01, the large white sand resistor mounted on the left side of the chassis frame as in the pic below, on the furthest terminal with the white wire attached to it. If your voltage is off the 120 mark you need to adjust R909 as shown in the pic below, until you have an exact 120 volts DC.

I can't locate R01 as my g07 is slightly different than the one he has pictured on his page.

If I measure at the end of the white wire that's attached to the big white resister mounted horizontally I get no reading

Here's a pic...the resister mounted at the end of the white wire (on the monitor metal chassis) has 165 volt to it yet (exactly same incoming voltage on the switcher) when I move the adjusting pod I do get any change thus I think I'm in the wrong spot.

I'm sure this will be a quickie for someone that actually knows what they are doing

 

[mudhens1]

you have 165v at your switching power supply?

 

[ELutz]

you have 165v at your switching power supply?

My thoughts, exactly! You really should figure out what's up with that.....before you start on the monitor.

Also, the switcher does not power the monitor.

Edward

 

[Oryk Zinyo]

You are not in the wrong spot, you have a serious problem with your cabinet. You need to get the AC input down to the range the monitor (and power supply for that matter) are designed for. Is the power coming from the wall outley 165v?


I think you have your isolation transformer wired incorrectly and that is why you are seeing 165v.


Also, your G07 matches perfectly to Bob's pic...

 

[MonsterBash]

Edit..
Was testing for AC..DC is 120 and was able to adjust the monitor with no issues.

Well..
Here's what I got..

I will say the hardness in this thing is completely unmolested.. which of course isn't saying that there is not an issue with it

The switcher is installed by connecting the 115 side to what looks like the marque light line coming out of the transformer (Bob Roberts kit and instructions). Also on that same 'tab' on the transformer is the purple wires that power the monitor.

The voltage at the tabs where the marque light and monitor power is at 165~170AC.

Is my transformer FUBAR? I'm assuming there no way to turn it down?

And that would figure and I just traded a transformer block yesterday =(

In the pic you can see the 2 165 AC tabs off the transformer that have the monitor power wires and the marquee wires

 

[MonsterBash]

Wall measured 120AC.

I removed the switcher hardness and plugged it back into the PS which completely took the switcher out of the picture and had the same results. 120 at the wall..165 from the transformer.

Figures.. the game is actually running flawlessly, until the monitor explodes of course!

 

[Oryk Zinyo]

You should be able to tap off of a different pair of lugs on the isolation transformer to find something closer to 120vac. Many transformers are wired so they step up or down the voltage across certain taps in order to run different power outputs. Either you need to adjust the input lugs or the output lugs.

Here is a write up from Bob Roberts that may help you.

http://www.therealbobroberts.net/xformer.html

 

[Dokert]

Edit..
Was testing for AC..DC is 120 and was able to adjust the monitor with no issues.

Well..
Here's what I got..

I will say the hardness in this thing is completely unmolested.. which of course isn't saying that there is not an issue with it

The switcher is installed by connecting the 115 side to what looks like the marque light line coming out of the transformer (Bob Roberts kit and instructions). Also on that same 'tab' on the transformer is the purple wires that power the monitor.

The voltage at the tabs where the marque light and monitor power is at 165~170AC.

Is my transformer FUBAR? I'm assuming there no way to turn it down?

And that would figure and I just traded a transformer block yesterday =(

In the pic you can see the 2 165 AC tabs off the transformer that have the monitor power wires and the marquee wires

You have a Williams power brick, and you need to shift the lugs on the transformer. It is covered in the game manual.