Re: Re: Space Invaders Monitor Question

Ok, looks like the monitor swap was the first thing you tried (makes sense, not to mention what you wrote below ;-(

but when you say you've measured the video signal, is the voltage the same between his cab vs your cab?

James H.

>
> From: James Hagen <jameshagen@tds.net>
> Date: 2006/05/03 Wed PM 03:43:46 CDT
> To: <rasterlist@vectorlist.org>
> Subject: Re: Re: RASTER: Space Invaders Monitor Question
>
> What about the tube itself? I wonder what would happen swapping his monitor into your cab (sorry if you did this, I didnt catch the entire thread) Maybe it's a gun issue...?
>
> James H.
>
>
> >
> > From: "Matthew Rossiter" <rossiter@ni.net>
> > Date: 2006/05/03 Wed PM 03:20:05 CDT
> > To: <rasterlist@vectorlist.org>
> > Subject: Re: RASTER: Space Invaders Monitor Question
> >
> > I checked everything including the video signals and set the brightness and
> > contrast correctly. Still the whites are smearing a little too early when
> > turning up the brightness. When this monitor was in the other cabinet the
> > focus stayed nice and sharp all the way up to full brightness (but not
> > oversaturated) and no smearing. I bypassed the composite wires and soldered
> > in a gold plated RCA connector on the board and on the monitor, still same
> > results. My board was tested in the other cabinet, so it's not the board
> > either.
> >
> > Either I'm overlooking something, or it's a power issue. Is it possible
> > that the 115v AC going in to the monitor could have something to do with it?
> > I haven't checked on the oscilloscope to see if there's anything odd yet.
> > The AC is coming directly from the wall right? And the isolation
> > transformer is mounted into the monitor and jumpered to 120v. There's also
> > a 100v setting.
> >
> > I have a midway Double Play that has a good sharp and bright screen - maybe
> > I can compare the differences.
> >
> > Kinda strange...
> >
> > Matt
> >
> >
> > ----- Original Message -----
> > From: "Rodger Boots" <rlboots@cedar-rapids.net>
> > To: <rasterlist@vectorlist.org>
> > Sent: Wednesday, May 03, 2006 11:55 AM
> > Subject: Re: RASTER: Space Invaders Monitor Question
> >
> >
> > > peter jones wrote:
> > >
> > >> -----Original Message----- From: "Matthew Rossiter" <rossiter@ni.net>
> > >> To: <rasterlist@vectorlist.org> Date: Wed, 3 May 2006 09:12:46 -0700
> > >> Subject: Re: RASTER: Space Invaders Monitor Question
> > >>
> > >> > mirrored glass clean.... check Bad video ground.. I will
> > >> > re-check.
> > >> >
> > >> > thanks.
> > >> >
> > >>
> > >> not just the ground, check the video cable carefully. remember -
> > >> composhit video is very sensitive unlike rgb.
> > >>
> > >> i dont know what you have there, but zacarria used a single-core
> > >> screened cable for the video to block interference.
> > >
> > >
> > >
> > > Another thing I've run across is most people don't seem to be
> > > able to properly set up a monitor. A lot of blurry pictures
> > > are caused by setting contrast too high. That saturates the video
> > > stages and the whites smear because of it.
> > >
> > > In the case of this old of a game, turn down the contrast, set the
> > > brightness until the black areas start to glow, then turn down the
> > > brightness until black is black and adjust contrast for the desired
> > > white level.
> > >
> > > Doing it this way compensates for most
> > > power supply/monitor/wiring/board combinations.
> > >
> > > If the brightness control is set too low the contrast ends up having
> > > to be set too high and you start smearing.
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> > > chris@westnet.com
> >
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> >
>
>
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Received on Wed May 3 17:10:01 2006