Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: RayB on November 06, 2009, 12:25:54 am

Title: Swapped G07 tube, what's yellow cable for?
Post by: RayB on November 06, 2009, 12:25:54 am
Got a G07 in a Midway cocktail and I can't get any reds (well, maybe the faintest of dark brown), and the other colors are kind of weak. I tried a different (known working) chassis and the image is the same. I tweak the pots on the neckboard and barely see any difference in anything. I think only the blue showed any effect.

To be sure it wasn't the signal, I hooked up another good monitor to the video output and that one showed a nice bright colorful picture.

So... experts, is it likely a dying tube/guns?

Title: Re: G07 with no red and weak picture overall
Post by: SirPeale on November 06, 2009, 04:56:03 am
Someone recently described a similar problem.  Check R517.
Title: Re: G07 with no red and weak picture overall
Post by: Kevin Mullins on November 06, 2009, 11:20:27 am
But if a known working chassis had the same results, then I'd be checking the tube.
Title: Re: G07 with no red and weak picture overall
Post by: Ken Layton on November 06, 2009, 01:25:14 pm
Connect the tube to a rejuvenator and test it. Ends any guesswork.
Title: Re: G07 with no red and weak picture overall
Post by: SirPeale on November 06, 2009, 04:28:52 pm
That'll teach me to skim.  Yeah, hook it to a rejuvenator (if available) and if that fails, replace the tube.
Title: Re: G07 with no red and weak picture overall
Post by: RayB on November 16, 2009, 11:54:05 pm
As if I'm gonna find a rejuvenator. ;-)
OK so I found another G07 tube and swapped them. Paired it with my "best" chassis (a clean, capped one with new flyback and width coil). Got a nice picture, but the Horizontal width coil adjustment does nothing. Any ideas?

Oh, and I need to know if this flat yellow cable is supposed to be attached to anything (the cabinet had no wires that would appear to attach to that)

Title: Re: Swapped G07 tube, what's yellow cable for?
Post by: Ken Layton on November 17, 2009, 01:23:50 am
That's the picture tube ground wire. It plugs into the "E" terminal on the neckboard.
Title: Re: Swapped G07 tube, what's yellow cable for?
Post by: RayB on November 17, 2009, 01:58:33 pm
What gauge wire should I use?
I don't have this wire on ANY of the 3 G07 chassis in my possession.
Title: Re: Swapped G07 tube, what's yellow cable for?
Post by: Kevin Mullins on November 17, 2009, 02:33:52 pm
What Kens saying is there is a "pin" that that plugs directly into on the neckboard.
Look for what looks like a test pin marked "E".
Usually a small spade terminal looking pin. (matches the end on the yellow wire)
Title: Re: Swapped G07 tube, what's yellow cable for?
Post by: RayB on November 18, 2009, 04:11:48 pm
OH. What threw me off is that BOTH tubes had that cable mounted in the plastic cable holders. I thought that's where it went. LOL

Thanks
Title: Re: Swapped G07 tube, what's yellow cable for?
Post by: Kevin Mullins on November 18, 2009, 04:20:12 pm
Nah, looks like they just did that to hold it out of the way.

That plastic cable holder on the tube is actually for the big red flyback anode lead.