Why did SNK keep making 5v AES systems?

[Neo Alec]

My understanding was that SNK added a daughterboard with a voltage regulator to early models in response to people plugging in a wrong AC adapter and frying their consoles without the regulator built in. Later AES revisions incorporated the voltage regulator circuit into the design. Why then is it still possible to find later model 3-4 and 3-5 boards that are meant to be used with regulated 5v AC adapters? Was it that the board revisions all came early enough in the Neo Geo's life that they were still figuring it out? Maybe there was a shortage of a certain part needed to make the non-5v systems?

FirebrandX's guide on this subject, for reference:

Neo Geo AES Power Supply Adapter Guide

 

[HeavyMachineGoob]

My first thought is SNK still needed to sell overstock of 5V power adapters.

 

[Neo Alec]

It's possible they identified particular markets (certain types of retailers) that were higher risk than others, and sent their non-5v stock there, taking a calculated risk on the remaining 5v ones.

There was a mix of 5v and non-5v in Japan. What about other markets? Was it more of a clean break to the non-5v systems in the North America and Europe?

 

[BIG BEAR]

I believe you nailed it in your initial post.There was a parts shortage and they reverted back to the 5v.Plus you have to remember that they fixed the composite issue making the 5v supply less of a non factor in the picture quality..
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[Neo Alec]

I believe you nailed it in your initial post.There was a parts shortage and they reverted back to the 5v.Plus you have to remember that they fixed the composite issue making the 5v supply less of a non factor in the picture quality..
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I didn't know there was link to the video quality.

 

[HeavyMachineGoob]

I didn't know there was link to the video quality.

It's two separate things, for the 1st gen NEO-AES board.

Video cleaner daughter board:

Video PLL - NeoGeo Development Wiki

wiki.neogeodev.org

Step down converter board:

NEO-POWER-0 - NeoGeo Development Wiki

wiki.neogeodev.org

 

[Neo Alec]

It's two separate things, for the 1st gen NEO-AES board.

Video cleaner daughter board:

Video PLL - NeoGeo Development Wiki

wiki.neogeodev.org

Step down converter board:

NEO-POWER-0 - NeoGeo Development Wiki

wiki.neogeodev.org

I know there are separate daughterboards for these, but @BIG BEAR seemed to be saying the 5v supply was originally responsible for inferior composite video quality too.

 

[BIG BEAR]

I know there are separate daughterboards for these, but @BIG BEAR seemed to be saying the 5v supply was originally responsible for inferior composite video quality too.

With the boards that have the bad composite circuitry..
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