RE: Konami Circus Charlie Red Lines

Unlikely to be ROM, more likely bad video RAM - this is not always testable
by the CPU...if it is Dynamic RAM and is soldered in, you can use an old
trick of wedging a GOOD RAM IC overtop of the suspect one. This works in
many cases - such as Space Invaders, Taito boards and other games that use
Dynamic RAM (4116 is just one example of a Dynamic RAM)

John :-#)#

At 07:22 PM 11/01/2004, Al Warner wrote:
>Hi Everyone,
>
>Thanks for the tips. I had already replaced the power supply because the
>original didn't have an adjustable +5V. I have tested other boards
>(Hypersports / Pooyan / Gyruss) in the cabinet and they work fine from a
>graphic perspective.
>
>Gonna mess with the ROMs this week to see if it helps. Also, I don't
>think it's power because if you look at pic 89 you can see that the red
>lines go around the Logo. Looks like it's confined to a particular plane.
>
>Any other hints would be appreciated.
>
>Thanks,
>
>-Al-
>
>
> > I was going to say a low +5 voltage; I have seen low voltages cause a
> > variety of issues including graphic/screen "noise".
> >
> > Peace!
> >
> > [Get Delete FXP Files 1.0 Now! http://www.deletefxpfiles.com/]
> > -=- James R. Twine, MCP, (jtwine@jrtwine.com)
> > -----BEGIN GEEK CODE BLOCK-----
> > Version: 3.12
> > GCS d- s+:+ a30 C++++$ UL+++>++++ P+ t+++ 5+ X+++ tv+
> > b++ DI++ G++ h e(++) r++ W++ N+++ w++(+++) M-- PS+
> > ------END GEEK CODE BLOCK------
> >
> >> -----Original Message-----
> >> From: John Robertson [mailto:jrr@flippers.com]
> >> Sent: Sunday, January 11, 2004 6:57 PM
> >> To: rasterlist@vectorlist.org; rasterlist@vectorlist.org
> >> Subject: Re: RASTER: Konami Circus Charlie Red Lines
> >>
> >>
> >> If these lines drift around a bit I would be checking the
> >> power supplies.
> >> Looks to me like ripple on either the -5 or +12VDC supply.
> >> Might be on the
> >> regular +5 as well...so check them all!
> >>
> >> John :-#)#
> >>
> >> At 02:37 PM 11/01/2004, Al Warner wrote:
> >>
> >> >Hi Everyone,
> >> >
> >> >I have Circus Charlie board that works fine except that it
> >> had these bad
> >> >lines going through the main screen. I did some checks on Google and
> >> someone asked a similar question about another Konami game,
> >> but got no
> >> >answer. I have swapped out the video RAM so that's not it.
> >> I'm going to
> >> >mess with the ROMs now (already cleaned), but any advise would be
> >> appreciated. Screen shots at http://www.alsarcade.com/cc/pics
> >> >
> >> >Thanks,
> >> >
> >> >-Al-
> >> >
> >> >-=-=-=-=-=-=-=-=-=-=-=-=-
> >> >Visit Al's Arcade
> >> >http://www.alsarcade.com
> >> >-=-=-=-=-=-=-=-=-=-=-=-=-
> >> >
> >> >
> >> >
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>-=-=-=-=-=-=-=-=-=-=-=-=-
>Visit Al's Arcade
>http://www.alsarcade.com
>-=-=-=-=-=-=-=-=-=-=-=-=-
>
>
>
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Received on Mon Jan 12 13:53:09 2004