Sega Saturn Switchless MOD HELP?? =)

[Silver237]

Ok, I understand a few things on the site, but I am not clear on others...
 
Specifically the part about pin9+12 connecting to the jumper pairs, "One point will connect to +5v, another to GND"..Does that mean ONE wire from each pin (9&12) will be SPLIT IN HALF to connect to the respective jumper ends of +5v & GND?

Second...about the Common pins on the jumpers.."and the remaining pins are common. Connect to either of these common points." ...Connect what to the common points? The same split wires again....or the jumpers themselves? I am not understanding this at all...is there ANY way you can make a quick connect the dots with the simple diagram I put together (shown here) from the site pics of the jumpers (which are the ones that look EXACTLY like my Saturn's) & the 74157chip? THAT would help me out a TON =)

Third...it is mentioned.."Connect the +5 and GND pins to the appropriate place on the PCB....you can simply solder or stick wires into the power-supply connector, which has clearly labelled pins."....My power supply has 4 slots/pins for plugging in the power strip, does it matter which one I put it into? They aren't labelled & I assume they are all the same voltage. Or do I need to use my multimeter to find out which is the exact +5v power pin for the chip to work?

One last thing...the Ground (pin8) can just be soldered to a screw point somewhere on the SS PCB/board right?

I appreciate all your help in advance, I know this seems like a lot to answer, but I want to get this stuff cleared up in one swoop..also so others who have the same ?ions can see this too  

[Martin]

The Power Supply has labels on it
G is ground solder the ground line to that, 5V is 5 volts.

[NFG]

Now this reply may sound a little harsh.  In fact, it is a little harsh.  This is a classic example of someone not applying brain before asking questions.  

I admit - the Saturn mod isn't the easiest one to wrap a head around, and it's probably true that I didn't do a great job of making it abundantly clear (tho plenty of people HAVE figured it out...) but the questions about ground and the power supply clearly show the person asking the question didn't try anything themselves - even though they have the tools - and doesn't understand the first thing about electrical theory.  A couple of minutes with google would seriously enrich some lives.

Now that I've irreparably burned a bridge, here are the answers:

Does that mean ONE wire from each pin (9&12) will be SPLIT IN HALF to connect to the respective jumper ends of +5v & GND?

Of course not, that'd be total madness.  If you connect +5v and GND you'll start blowing fuses.  It means that in each jumper pair there's only three points: +5v, GND, and COMMON.  In the diagram you included above it shows pretty clearly how this works: +5v on the left, GND on the right, common in the middle.  You can see how the common line is <gasp><shock> common to both jumpers: 6+7, 8+9, etc.

It's a simple English word: Common.  Connect the pins on the chip labelled 6+7 to the common point of jumpers 6+7.  Nobody better show you a diagram 'cause if it's not clear now I doubt you'll be able to follow the lines drawn for you.  

My power supply has 4 slots/pins for plugging in the power strip, does it matter which one I put it into? They aren't labelled & I assume they are all the same voltage. Or do I need to use my multimeter

You have a multimeter and you're still asking this question?  <sound of head meeting desk repeatedly>  Are you the laziest man on earth or what?  Also, ask yourself this: What good is a power supply with four pins of the same voltage, and no ground?  (hint: no good at all)

One last thing...the Ground (pin8) can just be soldered to a screw point somewhere on the SS PCB/board right?

You can connect it to anything grounded, normally this includes things like screws and metal shielding, but you've got a f**king multimeter, USE IT!  Why did you buy the damned thing?  Have you even taken it out of the box?  Do you know what it DOES?

[Silver237]

I forgot to mention...MY MULTIMETER IS BACK HOME IN ANOTHER STATE & NOT WITH ME =) Thats why I was asking...just for future refference. Of COURSE I would have used it if I had it with me  <_<  

[bcforn64]

It must also be said that this mod defaults the console to Japanese mode, to default it to US you have to switch the wires that go to pins 9 and 12 on the chip.

[Darklegion]

Pick up a new multimeter mate.Even the crappiest/cheapest ones will work for most purposes,$5US or less should be enough....and don't tell me you can't afford that
Its pretty much required equipment if you ask me,you can't trust your eyes to pick up everything,and if vcc and ground are next to each other on your circuit,which they most often are as this is usually the best method of design,you are going to f*ck things up.