Blown ntsc Sega Saturn mod 2 power board. Advice needed

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Linking 9v to the RGB select line is incorrect. Its 1-3v for RGB select.

Do you have a link to the pinout (and any resistors used) in the offical cable? As that sounds very wrong.

I am pretty sure the cables I have has pin 8 (5v) linked to both pins (with a resistor between the RGB select to bring it down to 3v).

This is why they do not work properly on modern (widescreen tvs) and switch back and forth between widescreen (5v-9v) and 4:3 (well actually, its just dipping below 5v which is technically off, but as you have already changed the channel to scart input, its 4:3). Before Widescreen TV's were around, this wasnt an issue as the only mode was 4:3. I just ended up disconnecting the auto switch pin and manually change the channel.

 

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widescreen/4:3 switching wouldnt occur with 9v - so that very much backs up what you are saying.

However all those scart cables (including one that my friend says came with his model 1 saturn) that we thought were official - all have 5v rather than 9v as the source to those pins.

 

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Well you remember in that other thread we talked about official scart leads and the ones without the screws - those have 5v and my friends console has that same cable, which he swears came with his model 1 at launch.

 

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Not sure, but they are definitely 5v on the one I have (which does the widescreen switching thing). The one my friend has also does the widescreen thing and the cable looks identical (yes, the ferrite bead ones with good shielding)

I will get his cable just to confirm, as this is quite weird. As I said before - I cant be certain my ones are official (came with console bundles), but he claims his is.

 

This post was exactly what I was looking for in terms of motherboard revisions

All I could source was another 4pin 110v model 2 NTSC power supply. So I just bought that and I'm going to buy another step down (a better one) and START AGAIN.

Plus I have an NTSC scart cable...

however if someone wants to sell me a 240v model 2 power board please let me know!

Also, are Jap NTSC model 2 power boards interchangeable with USA NTSC model 2 types?

 

Try making a WTB in the (surprise, surprise) Want To Buy section of the market. Maybe someone will respond.

 

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Thanks heaps! God I hope the actual motherboard isn't damaged!

 

Ok, I've had a bit of luck and have sourced a model 2 240v 5pin psu. It's on it's way.

So I read through your posts and just want to clarify as I'm a bit confused. With a pal power supply, the console will still technically be a NTSC console? So without that 5th pin, am I still going to get RGB with this NTSC scart cable?

Thanks!

 

yes, thats right.

 

Great that you got the 240v power supply. I was given an ntsc saturn a while ago where someone had plugged it into an Aussie power point, obviously it went pop. I got a new american power supply as that is all I could find at the time. I have a step down transformer that I use for my desolder gun, plugged it all up and the console works! Just posting this up for a bit of confidence your console should be fine.

 

Hey thanks! Greatly appreciated man!

 

Hey guys, i've installed the 5-pin PAL 220-240v power supply in this US NTSC Sega Saturn with a 4-pin motherboard.

Before I plug this in and test it out, I want to make sure the correct psu pin is not connected on this 4-pin motherboard. I've circled the pin below, just to be 100% sure this is correct and this is supposed to be the vacant pin.


Can someone please let me know if this is right?

I'm assuming this PAL psu pinout in the picture above is: GND, GND, 5v, 5v, 9-12v
And here, the 9-12v is not connected

Thanks heaps

PS. I should also note, I noticed the plug for the blown US 110v psu actually has one "square end", where as the 240v psu plug accepts the two "round ends". I didn't know this, is this common in the US? I have a PAL playstation2 power cable which seems to fit fine in this new 240v sega saturn psu - safe to use? (I can't use the US power cable as it doesn't fit)

 

Looks good to me, reference it to this site

http://seb.riot.org/saturnmod/frontside.sml

And yes use the standard "figure 8" cable that you mentioned. The original 110VAC supply that was in the Saturn I had had the same deal with the power supply. The replacement one I got had the both rounded edge type.

 

SUCCESS, IT WORKS!!!

Thanks so much, btw I googled everywhere and couldn't find much but that site is a great reference.

Glad I documented this for those who have no idea what they are doing.

 

Yahoo! Glad it worked for you! Yes if I ever find any handy tit-bits like that, add straight to favourite's!

Also where did you find the power supply?