Sega Saturn DIY Replacement Power Supply PSU Jpn - YouTube
ฝัง
- เผยแพร่เมื่อ 6 ก.ย. 2024
- Sega Saturn DIY Replacement Power Supply Conversion.
A detailed tutorial video on how to replace the PSU in your console when it fails, or if you want to power a 100V Japanese console with 240v. We use an external 12V DC supply into a Pico ATX PSU and modify it for this custom purpose. This conversion is suitable for all models both Saturn and Dreamcast with just small tweaks to the mod.
Conversion kits will be available for purchase - Kits available June 2017 from Retro Sales Australia with Worldwide shipping
www.retrosales...
Please comment if you have any questions. Share and Like.... and of course Subscribe to see more tutorials.
Find us here - www.globalgarag...
Support - / globalgarageaus
I had an issue with booting games using a picoATX and 7809. Games would just halt mid boot always at the same spot. Using an original PSU there was no issue booting.
I measured voltages during boot and observed there were fluctuations on the 9V rail. The original PSU would mostly sit at 9.1V and dip to 8.9V at the same spots where the game would hang with the pico. Measuring the same on the pico is would sit at 8.9V and dip to 8.6V.
So I concluded the 9V rail was the issue and replaced the 7809 with a $1 mini DC buck converter from ebay, adjusted the pot until i got a 9.1V reading and the games were booting fine after that.
Yes, this is a thing although I believe it’s more about the current spike as the CD drive spins up and seeks. You will certainly see a voltage drop but moving to the buck you’ve effectively given it over 1amp supply current which it needs. The old 7809 typically comes in 1amp packages, but if you use a better one they can supply 1.5amps and overcome this issue. Just another way to solve the same issue. Thanks for the comment as this is a hot topic.
Great idea!!! What I would be tempted to do is remove the ATX connector from the PCB, then mount a couple of grounding loops (like a washer with a solder tab extending off it) onto a couple of the ground points where the ATX connector was - then you can put screws through them to mount it to the shielding below (obviously leaving the clear plastic there to isolate also). That way it should be more secure in the case. Brilliant idea though! I suspect we are going see more of these mini ATX PSUs and DC to DC convertors used in old retro systems in future.
GadgetUK164 Thanks mate! I've been thinking about this one for a while and the mini ATX PSU seemed perfect so I gave it a go. The key was finding one that could supply 2A on the 5V rail, so most other solutions don't flow more than an amp. Yep extra grounding is a good idea so I'll try that and finalise the mounting.
I got what I thought was a PAL saturn off ebay from a fella in Australia but it turned out having a 100v label and Japanese writing underneath, I don't have a stepdown converter so heres hoping he wasn't lying when he said it was tested and working, and lucky i checked and didn't plug it in!
Went googling for alternate power supplies, found a 40 minute video instead lol
But cheers
Found a mini atx supply for 21 bucks delivered on ebay!
Very nice!! I bought a 240v power supply for both a original and white Saturn from HK a couple of years ago, but was never able to get a DC power supply. Both my original Saturn I bought in 1994 and my DV I bought in 1998 were Japanese. These I do not touch but secondary Saturn and DC systems are different. I would love to be able to future proof my systems without worrying about stepdowns in the future. Still need to get my Saturn and DC SD readers whichvis where these will come in handy.
Glad to see you doing what you do best Global.
I haven't seen this before on TH-cam on a Sega Saturn & Dreamcast DIY Replacement Power Supply. But I'm gald that you did.
Very informative and excellent work I must say. Well done kind sir.
Anthony...
Charlie Cat Thanks. I hadn't seen it done either, so I thought it would make an interesting video
I read on the assemblergames forum that there is a kickstarter for a mini replacement psu for dreamcast. Maybe this could be accustomed to fit into the saturn too.
Awesome video as usual. It's stuff like this that really inspires me to delve deeper into electronics and console mods. Keep em comin!
is there a easy fix for a early Japanese ps1 console so I don't need to use a stepdown converter?
thank you.your video is great. copied your tutorial , now my jPN saturn is working for 240v :)
While I agree switch mode power supplies are better its silly to replace those as the consoles arent designed to handle noisey voltage inputs.
Hello there! My pal Dreamcast PSU is broken, and my Japanese Dreamcast needs a colossal external step down converter, so you can imagine how much relief I am after I stubble upon your amazing mods! Now, my question would be, how feasible would be to utilize your external psu, internally.. I don't really like to drilling my consoles, so I hope that could be possible.
I have a fine psu on my jp console, but plastic on power socket cracked because of time and a part which holds one of the screws just fell off. Any ideas what kind of socket i can use to replace it?
Just did the Japanese PSU swap for Micro ATX PSU on the first Japanese Sega Saturn model. The 6 pin model, the one host shows at the end. Confirming the pin-out;
1. GND, 2. GND, 3. 3.3V, 4. 5V, 5 empty, 6. 9V.
Good luck with your mods.
Actually, if you need that 9V you can use a simple step down converter 12V->9V. A nice small one in plastic enclosure costs about 3USD on eBay with free shipping from China.
4.5v? I haven’t seen that model before. For the 9v i just use a 7809 as it’s just a few cents
I'm considering buying this kit from you guys. I have a Japanese White Saturn v2. I see on the website some changes/updates have happened for this installation since this video was uploaded. Would you consider doing an updated installation video?
Yes I am considering making a new video to cover the different Saturn revisions and to wire in the power switch the correct way. The website shows the updates at the moment. That’s the only change.
@@GlobalGarageAus Sounds good!
As for an idea for next project. Upgrade the Sound with a S/PDIF for fiber optical sound. That is a project I am working on but I have nothing to refer to as in video instructions. I want to do this project to a Sega Saturn and Sega Dreamcast.
That sounds like a great project. Have you made it work yet? Make a video and share it here with us. Good job!
Hi. Is it possible to put a pal model 2 power suply on a pal model 1 ( 5 pin both ), please?
Definitely would be interested in a conversion kit! Do it!
Can you also use a 120W PicoPSU? I ordered 2 of those 160W Pico PSUs from china and I did manage to make this mod work but sadly once I bridged the PSU like you did in the video I managed to turn the saturn on but not off afterwards so I disconnected the Power Brick and after that the PicoPSU died, now when I connect it to the powerbrick, the control light on the power brick will go dim. I meassured the Voltage on the brick and its 12 Amp no problem but on the broken Pico PSU it shows no voltage at all, do you have any advice what happened to the PICO PSU?
@Global Garage
What size of pin headers You have used? It's CH3.96?
Edit: I will answer to myself :) Yes it is CH3.96.
Thank you. This exactly what I was looking for.
The DIY power supply is still running strong. It's super easy and works perfectly.
mate your a genius!! , thank you so much
MrKrimstah Thanks!
Can i replace my japanese model 1 saturn psu with a pal model 2 one?
Yes, generally that's fine as long as the pins are all in the same order. So just check the socket that connects to the motherboard and make sure the voltages are all the same. Typically 3.3v 5v 9v Gnd etc
Installing these power supplies with the ENGAGE pin permanently soldered is wrong.
You will end up with a power supply that will fail to turn on properly as the engage circuit locks before fully powered most of the time.
You should wire 12v directly to the PICO and use the engage pin for its intended purpose, the switch....
So If I'm reading correctly, solder the yellow cables to Pins 10 + 11 and then solder them to the 9V regulator? Don't quite understand what you mean by using using the Engage pin with the Saturn On switch. Do you mean to solder one of the Power cables to it to properly toggle the power of the PSU?
Asking out of curiousity since the method in the video looks like it works and curious about slight changes to the method if they provide better results.
ChaosFusion100 go look at a computer power supply pinout
You don't hardwire engage pins on a pc build and you shouldn't do it here.
Ground and engage goes to the switch.
So I had it wired with the ENGAGE pin permanently soldered, a bunch of times I had the PSU stop working until i disconnect the 12V source and plug it back in, I assume what was happening is the engage circuit locked before fully powered. So I went back and connected my power switch to the engage/gnd pins.
You are right. I did the installation according to the video, but the Saturn wasn't powering on every time. I had to wait 10 seconds after powering it off in order to turn it back on. But then waiting longer than that and it might not turn on... it was strange. So I wired the switch to the power supply instead as you suggested and now it works perfectly.
Maybe some of you can help me with this one, can I jump the two 5V for the jap saturn, and what do you mean with "wired the switch to the power supply"? here is a link for my awesome Paint drawing: imgur.com/k5PgqUP
I have the model of Saturn with the power supply in the lid and I think the thing died. So maybe this would bring it back to life.
Love your peg mate ;) Bloody good idea!!
Why not use the spu own switching instead of soldering the two together and taping into the power wire
great video! thanks!
Hi, i just picked up one of these psu for the saturn and had a question. Because you now recommend to wire the power button directly to the board, do you still need to bridge pins 16 and 17 like you did in the video?
Frank Crispo globalgarage.com.au/dc-saturn/
I'm in the USA and thinking about buying a Japanese Saturn. I was considering buying a USA PSU and installing it into the JPN console. Is there any reason I shouldn't do this?
Nice video, lots of good info there, two things though:
1-I think your calculation of required amperage is wrong.
You calculate the total amps based on the rating printed on the PSU, but amps are relative to their voltage.
If we use watts instead, we arrive at about 15W total: 9V@0.3A=2.7W + 5V@2A=10W + 3.3V@0.6=1.98W.
Looking at the rear of my saturn I can see it is rated at 20W, which would cater for 25% extra draw.
Now the PSU you are using is 60W: 12V@5A=60W, which is 3 times what the saturn would ever need.
A 12V@3A PSU would still be 36W which is more than enough. As you mentioned in the video the Pico might waste some current in the conversion process but shouldn't be anything major.
2-You should really put some heatshrink on the regulator pins, the mounting method you are using is a clever trick but not 100% mechnically sound, with enough force the regulator could fall off and short other pins.
I'm doing this mod right now and your video helped heaps scoping the whole thing, thanks!
Thanks. Yes, I I only recommend a 3A power supply these days. Theres nothing wrong with using more, but it's not needed.
If you do end up selling these as a kit please let me know. I've got a PAL Model 1 SEGA Saturn that has a Model 2 style PSU and would like to do the same as you have done in this video.
Hi, voltage regulator is 7809 or 7812?
I used a 7809 to provide the 9V DC to the pin header.
thanks love your vids
Thanks for watching!
I'm having trouble locating a pin header like the one in your video - where did you get it from?
This is some generic Molex KK connector, probably the 3.96mm one
Do you get any video noise or artifacts when using this power supply? I'm just wondering if it's similar to the DC-DC 7805 replacements that can actually add a load of ripple noise to consoles. I have a Japanese saturn on the way and will most likely be doing this mod! 😁
Also, instead of wiring pin 16 permanently to ground, could you wire the switch in there to control it instead?
You created a question when you picked up the 12 volt power pack. If 12 volt is the maximum with the currents you had available could you have used voltage regulators and resistors to get the same effect? The Sega power supply I have had caps and diodes up s**t creek, so wondered if another way would be possible?
Yes and No! (it depends) I did use a voltage regulator for the low current 9V, but in theory, you could simply use the 12v input voltage and then just use the correct voltage AND current regulators to get the outputs you want. Even resistors wired correctly in series would achieve this BUT this type of configuration really needs to handle the current flow for the Saturn. Most voltage regulators are only designed for 1A and in this case we needed more. I would advise you build the circuit with the little pico ATX PSU as I did, then you will know the current supply is adequate. You can find voltage regulators in 3.3v, 5v, 9v that DO flow enough current, but it gets messy and has a lot more wires to solder. etc. Just keep it simple.
Cheers...many thanks
I recently brought one of these packs from retrosales.com.au, for my PAL Sega Saturn. I tested everything with a multi-meter and seems to be done right. Composite video works, but RGB SCART with CSYNC does not :(
Edit:
To be clear I'm using the XRGB Mini with my Saturn.
To be sure it's not the cable I've put back in the original PSU and it's working fine. Voltages are: 9.11v, 5.13v, 3.38v, G0v, G.
Using the PICO PSU kit I'm getting: 9.05v, 5.10v, 3.41v, G, G.
Would this minor difference be causing my issues?
It let out the magic smoke 💨
do you sell kits ? and does this work for a pal dreamcast
Great video mate, really like this style of tutorial. I would totally be interested in one of these if you do agree to sell them !
Being a complete noob in terms of electronics if you did do a mod to sell could it be made to straight plug & play? E.G; a Japanese Saturn running off a U.K. Power supply.
Japanese Model 1 I meant, same as your grey one
Robert Beard Yes any kit I sell would be completely plug n play
Global Garage - Cool well just let us know when/how to contact to discuss pricing, shipping etc & I'd happily pull the trigger 👍🏻
Im still looking at options and testing the kit on all of the console models. There's quite a few revisions of both Saturn & Dreamcast, but ultimately they're all the same. The kit be as easy as possible but not 100% plug n play as it's a conversion. I'll post again when it's live, but in the mean time this is my store www.retrosales.com.au
There's an alternative to this. Generic DVD player power supplies are readily available on eBay and Ali express, and these typically have 3.3/5/12V built in also, they're also arguably a better fit for consoles and work direct from the mains. For the 9V, you could just use a cheap variable buck converter, these are more efficient. Lots of different ways of doing this I guess - I would have thought that replacing the 200V capacitor with a 400V one on the original Japanese supply should allow it to work at 240V anyway.
Jason james Can you post a link Jason? If the specs are right and it supplies enough current, then it could be another alternative. I don't think swapping the main cap is that simple to convert the PSU to 240v. There's a lot more going on and components that can't handle that voltage. By the time you swapped them all out and made it work it would be more work that this mod IMO.
Hello I'm about to buy a Saturn import from Japan brand new. Should I just take out the PSU and replace it with you method. I don't really won't to use a step down. Seen so many Saturn for sale saying comes with step down power supply. But on board PSU needs replacing.
Yep just replace the Japanese PSU right off the bat.
any news on the kit
My PAL psu has 12v,5v,5v,gr,gr and my NTSC-J psu has 9v,5v,3v,gr,gr. can I use my PAL psu in my Japanese saturn?
Costrou No it’s not a good idea as the 12v rail is too high. You’re better off installing one of the psu kits I demonstrate in the video
Global Garage thanks for that! Was a bit unsure about it aye. Cheers, ill look into one of your kits:)
any update
Will this work on a Victor Saturn?
Yes, a V-Saturn is just a rebranded Sega Saturn (identical hardware).
How many watts is the psu that you used?
yoyoman62002 The small pico ATX can support max 160W if fed with enough current. My power supply was 12v 5A (60W) input which was plenty.
Thanks for your video, I really like it! I managed to pick up one of these pico power supplies but I only seem to have a power adapter that outputs 19V at 3.2. Would this be safe to use? I know you mentioned that you could get away with 3A but the 19V is what I'm not sure about. I will be using this to power a Dreamcast without a GDROM (I have a GDEmu). Thanks!
A 19v would break it. That is too much power. I'm not the guy but I have done this mod as well.
yoyoman62002 that's what I would have guessed but thought I would ask anyway. Thanks for the advice!
Not to take anything away from this, but I just realised I had some spare parts left over from fiddling with portable gamecubes, credit to LOCtronics anyway
But here is another way to get 3.3v and 5v rail, as for 12 you could use the 7809 you suggested to step down direct from the 12v supply, I got a bunch of these dirt cheap off ebay from China and they're handy as hell and come with mountable input plugs.
imgur.com/8IZsIhg
translate.google.com.au/translate?hl=en&sl=ja&u=www9.atwiki.jp/nannansei/pages/19.html&prev=search
Tried an XQ155 as it has written on it 250V and claims it might be 240v compatible
Fuse blew
Im going to shove an entire 12v 5a power pack into where the supply would go on double sided tape with the cord coming out the back as the case shuts on it and closes it nicely and use the 7809 to step down 9v and two PTH08080W's for the 3.3v and 5v rail off my unfinished GCP project
Ill show you when it's done
CBF getting the 7809 today....
is this safe with usb gdrom ?
Sure it. In fact it's safer than running the original power supply as when you remove the GD rom unit the power supply can overheat as it's not wired correctly to run without it. There are simple mods to fix this, but I personally think it's better to run a dedicated power supply like I show in the video.
any news on the kit ?
if only someone would sell this kit in europe, shipping cost to Poland is almost as big as price for the kit itself, meh, I have Dreamcast that needs a PSU.
DeMichel I’ve updated the postage options for Europe and USA to allow for a much cheaper untracked option.
Fucking get on with it, I'm exhausted. Your awesome but I watched this whole fucking video to find the +5v.