RE: Konami Circus Charlie Red Lines

Yes, that was my second thought. I already replaced it, 2 2128 chips.
They were soldered in, I put sockets in so it'll be easier to change
again. Unfortunatly, this did not help. I think I mentioned it in my
initial posting ("I have swapped out the video RAM so that's not it.").

Thanks for the response though!

-Al-

> 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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>>
>>
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Received on Mon Jan 12 15:57:50 2004