Re: 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.
> ---------------------------------------------------------------------------
> ** Unsubscribe, subscribe, or view the archives at
> http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
> chris@westnet.com

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Wed May 3 16:20:52 2006