EBAY Buy - SEGA SATURN MK1 with NO POWER! - Repair Video

[@electronicengineer]

If you position the power switch into its fully up (off) position, before pulling the cosmetic button up from the switch shaft, you would not break the latching post inside of the power switch. Just a tip for the future!

[@mikecro1111]

Bit of advice when working live, try to use something like a tupperware box to put over the various components to limit your chances of touching anything you don't want to probe. It's not perfect or fool proof, but it does help keep your hand raised when you're focusing on something else. Many small changes help reduce the risk that can never be fully eliminated.... It also means if something goes pop, it limits what may hit you. I always advise beginners to not touch mains voltage; and if they feel like they have to, to ensure they have either RCBO or RCD protection on the household electrical circuit, or use a plug-in RCD protector.

[@kazinwho]

Fixing Sega Saturns is the lord's work. Great video.

[@Ea-Nasir_Copper_Co]

> breaks device during repair One of us! One of us!!!!

[@technixbul]

I am happy that my advices helping you 😉It was an interesting problem, tipically on SMPS the ESR of electrolytic caps always go high (bad), in particulary in the small ones that prevent the oscillation of the swiching circuit (therefore that silence the whole PSU), you make sure you've always check them. The part you took off first, was the Switching controller + PWM + switching transistor in one case, those TOPxxx and TNYxxxx chips are poor made and many devices use them - TVs, Monitors, Video playing devices, washing machines etc. - they die very often and even explode to pieces once overheated.

[@martijnappeldoorn8686]

I was going to say exactly the same about these TOP, TNY and LNK ic’s but you beat me to it. They tend to explode or simply don’t oscillate like the one in this video. Don’t how many lnk304’s i’ve replaced in washing machines and dryers, tny180 in harman/kardon blu-ray receiver also fails alot.

[@Retro_Rework]

Great video and fix as always Vince! Have you ever considered doing a video on trying to fix something with a broken/severely corroded board by getting a new one made through PCB Way? I know it would just be a lot of transferring components from one board to another, but maybe a good tea break fix to just show a sped up/condensed video. Just a thought. Keep up the great work and love the channel!

[@kiphakes]

Ahhh man... I love the SEGA Saturn - my friend got a Mk 1 when they came out.. we played SEGA Rally and Virtua Fighter to DEATH.. I saved up and ended up getting a Mk 2. They were such incredible machines for the time - great home conversions of the SEGA Arcade Machines of the era!

[@Mymatevince]

👍👍👍

[@BuyitFixit]

Great job Vince. Nice showing the opto coupler working. The double diode packages are common on switch mode power supplies. They are used to rectify the output voltage back to DC. Agree those switch mode IC's seem to be a common point of failure. Keep up the great work 👍

[@Mymatevince]

Nice one Mick👍👍

[@calebgrant179]

😢s

[@calebgrant179]

​@@Mymatevince yy96hgj897

[@wisher21uk]

Brilliant fix Vince I always test them dual diode packages and mosfets with my fluke in diode mode, seems to be consistent for me, maybe those testers aren’t quite pushing the testing hard enough, I would say yours was breaking down under load? Keep up the excellent work, glad your finger is getting better 😊

[@Dasa188]

It's nice to find a reoccurring fault with a specific device. If I ever find a faulty Sega Saturn in the wild, I may pick it up and see if I can fix it!

[@andysmith1706]

After the Genesis/Megadrive, there was the 32x and Sega/Mega CD add-on things before the Saturn. Never had them, as I jumped straight to the PlayStation. I've got a few things to send over to your PO Box soon! 🙂

[@RWL2012]

true, but there were only about 2 million Sega/Mega CDs and 800,000 32Xs made, compared to 31 million Mega Drive / Genesis consoles and 9 million Saturns so I guess he was talking about major platform generations but yes you're right

[@1up_Gaming]

Glad to see a result in the end, this is another Saturn PSU saved :) If you ever need bits like a power button, do drop me a message, I very likely have a spare or two laying around :p

[@sirrell20004]

Sorry to jump in but do you have a mk1 reset button?

[@Mymatevince]

Thank you Mike👍👍

[@calebgrant179]

​@@Mymatevince xcvvxxxdddvvbbcvcxdcbccv

[@113odyssey]

Don't feel bad! I literally did the same fuckin thing trying to remove that button on my v1 a few months ago. You can get replacements from China that are the same just missing the screw hole mounts. I had to make a make- shift mount but I got my button working again. You just need a 5 amp 240vac switch. I bought one of the Alps ones. Just lmk if you need a link Edit: I wrote this at the beginning of the video. Glad to see the v2 switch worked just fine on the v1!

[@Dg-zj6jo]

that was a good little fix vince arcade game looks brilliant

[@Mymatevince]

Thanks DG👍

[@anthonydenn4345]

Great job as always Vince, I'm guessing the IC fault must be before the diodes on the output. That's why it didn't test as faulty. Cool little IC, never seen them before.

[@andymouse]

Just had a look at the Datasheet for the TOP202 and its quite a clever device but relatively easy to understand for anyone who would like to move forward and learn to use an Oscilloscope this would be a good place to start, having only three pins the correct waveforms will be clear and very easy to see if its running or not without the need for a tester ( a scope is a high level tester I guess !) It uses PWM to set and maintain an output so the pulses will be easy to spot and as you have a battery powered scope relatively safe. However I bear no responsibility if you blow your house up ! and of course you should proceed at your own pace and what your comfortable with but its a logical step or maybe stick to battery operated stuff for your first 'scopeing'...anyhow just sayin and Great Video !....cheers.

[@309electronics5]

Those little switching chips fail often! had a lot of monitors where the switched failed (am 15 and do street repairs for people in my street and village) and it had no output just like the PSU of the Sega. No idea why they fail maybe because they get too hot?! Idk

[@mrchilled85]

had this so much with saturns as i buy them a lot when they are cheap non working i have built a nice setup of old school consoles doing it as so far got 2 n 64's 2 mk1 saturns a mk2 , mega drive 1 and mega drive 2 , a boxed nes and got a master system 1 i need to sort out that has no power great video and keep them coming

[@rfmerrill]

23:54 did you bridge the power switch header on the known working one? :)

[@Mymatevince]

Hahahah, oh no I didn't. Schoolboy error on that one!!!! Well spotted! Must have been that chip though as it was the only component that was changed over once the others had been resoldered back onto the board 👍👍

[@instahawk8422]

The joys of the sega saturn my dad got one in the box second hand not long after the console was released from a thrift shop came with three games sonic 3d a golf game and torico the memory of that game got to the end level the city of moons never figured out how to finish the game all in all the game is cryptic and unusual such an underrated console many years later got a saturn for myself and the torico game one day I’ll finally get around to finishing the game I’m just happy i have them in my collection

[@krissy_h7854]

Another great video. Maybe, since now you got 2 of them, you could try to mod one to not use the original power supply but rather be powered of of usb-c directly?

[@carshomediy]

I'm doing a DC PSU to Naomi right now ... and had the same issue with the PSU not sending voltage through ... but only on the 3.3 and 5v outputs ... the 12v read fine. I wondered there if it wasn't pushing it through because the switch wasn't pressed. I've not got far enough through yet to hooking up a switch to it, yet ... but I'm hoping that's the issue. Looking forward to getting stuck in, though.

[@kieranblackburn3465]

The slide metal part of the power switch looks ad if it goes over to top out side part of the switch

[@firstsurname9893]

Yep, exactly right. There's a groove moulded into the plastic that causes the hook on the end of the steel pin to move under the piece that broke off when you press it the first time, which latches the switch. When you press it a second time the pin travels over the top of the broken piece allowing it to return to the off position.

[@jonjones.]

Hi Vince don’t know if you know the Tv series called wheeler dealers which is on discovery but they buy cheap cars and repair/renovate them and sell them on for a small profit, this weeks episode they buy a 1980 Rolls Royce Silver Spirit and fix it up it might be worth a watch !

[@Mymatevince]

I really enjoyed it Jon, I've recorded it as well 👍👍👍👍

[@tgheretford]

You've gone from being the Nintendo Switch killer to the Sega Switch killer. Saying that, I can't gloat because I managed to break a switch on a Pure pocket DAB radio after fixing it.

[@Mymatevince]

😂😂😂😂🤣

[@jrsc01.]

I always enjoy a MMV console fix!

[@sergeatar]

Hi love your video's, I have a fault on model 2 when I plug the S video I only get black and white image and the cable was tested so it works. I also tested with a RF cable but the problem is still there.

[@GarthBeagle]

Nice job! And I learned more about how optocouplers work 👍

[@Mymatevince]

Thanks Garth 👌

[@ClosestNearUtopia]

How to test in circuit. Measure input secondary side, measure output secondary side, compare readings and decide if the resistance went low, which basically means a low voltage drop.

[@jrsc01.]

loved the Saturn console, didn't do well in comparison but still great for its time.

[@krushingbro6620]

my mk1 saturn is still going strong never been fixed or repaired its an original 1995 model and its never missed a beat and ii spent so long playing sega rally time trials and variou other classics one thing about sega consoles is they are durable for the most part and are far more repairable than most others from the time.

[@jonathanmartin3375]

I really enjoy the console repair content. Excellent work Vince.

[@123simion1989]

Nice fix Vince! Thanks for the video!

[@andrasszabo7386]

Nice video, Vince :) That "double diode" stuff from the primary side should be a mosfet, not a diode pack.

[@chrisarmstrong2721]

Love these Retro vids :D Just the best :)

[@mikecass8306]

Nice one Vince, finger looks good now. 😊

[@Blitterbug]

The plastics on that power switch were brittle and yellowed with age. Not your fault, Vince.

[@CortinasAndClassics]

thanks for this, my power switch is also broken. I have seen replacements on ebay which is good.

[@ItsRemps]

May be worth investing in a cheap 3d printer if you ever want to quickly make new switches/gears which can be expensive or hard to find online! Great fix Vince!

[@_CryptoNoob_]

That poor finger Vince lol... Ever since I've known you, you've always been hurting those digits lol. Be careful bud ahahah

[@fredyelranger]

Hi Vince! Love the videos! I think the tester you're using is ill-equipped to test transistors like these voltage regulators, as it's not really useful to know that they're comprised of 2 diodes unless you need to pass an entry level EE course. Testing the voltage input and output while in circuit with power applied will give you more actionable information.

[@Stefan_Payne]

With a Fault like this and the age of the device, the small Bootstrap Capacitor right next to the primary Switcher is a good candidate of being faulty.

[@RedAlfie]

WooHoo a new MMV video!

[@Abauto84]

nice video again Vince your content is not only useful but I always find them comforting and enjoyable to watch

[@brunoramos9747]

The Sega Saturn was the best quality made system by Sega besides the Master System

[@TheSkaldenmettrunk]

It seems a big failure spot but you have spend it some more life. Very nice.

[@CannibalShadow]

Not sure if you have one already, maybe you do but would love a breakdown of the equipment you most commonly use to fault find. Might make an interesting video.

[@GadgetUK164]

Great job Vince =D Unlucky with the power switch =/

[@Mymatevince]

Thanks Chris 👍👍👍

[@markshellard5894]

Perfect time for a repair video

[@S3ARCH_N_D3STROY]

Vince where did you get your blue jumper from, I’ve gotta get one.

[@mrjsv4935]

Nice fix, another Sega saved from ending up in the landfill :)

[@JonnyFix]

In all my time dealing with power supplies of all types I've never known them to get damaged due to having no load. Some won't output the full voltage, computer psu were good for that.

[@dungeonseeker3087]

Yeah, its only really an issue on linear supplies, switching mode PSUs are fine. There are plenty of old PC PSUs that don't work without a load, mostly from the XT/AT era and when working on those old systems you should always have a HDD connected to the PSU.

[@ffkingcat]

Ah classic Vince breaking something on a console 🎉

[@gbmruk123]

fab video vince you should try get a commodore 64 or amiga :D

[@davebuxton8058]

i bought a saturn last week, plugged it in went bang. same component that you changed so ordered a new one. soldered it in but still not working. do you think its worth getting another, maybe faulty???

[@Renzsu]

I think that switch was broken already, there seems to be some leftover glue residue there from a previous fix.

[@Longplay_Games]

Very awesome! Another console saved.

[@kevinjones4415]

Would you be interest in a imac that's not working correctly?

[@Tim_3100]

Ooh trying to fix time ❤

[@LITTLEEXPERIMENTCHANNEL1]

man i feel old now i owned one of them. keep an eye on the game "panzer dragoon saga" if you find a good condition copy its worth a fortune.

[@ollieflp]

I have a Green dim flashing light with no start up, what could this mean?

[@catalincurca7949]

Vince, mate, what are you doing with all this stuff after fixing? I reckon you are keeping some of the things you repair, but what about the rest? Keep going with the videos and give us more Rolls footage :D

[@steveohim]

This maybe a stupid question but why do you test in DC setting from an AC power supply

[@maded2]

I've a Sega Saturn with an interesting fault, it stopped displaying any sprites. The game loads and can play. You see game background, but no sprites showing.

[@pikeplace187]

I had the Saturn. Liked playing Virtua Fighter 2 and Panzer Dragoon 2 Zwie

[@turji]

What type of desolder gun do u use? From aliexpress or :)

[@ralphj4012]

If you are UK-based you can get one from CPC (resources and help, bargain corner, tools, soldering) for £64.75, keep it to yourself.

[@Mymatevince]

My one was from CPC as Ralph mentioned 👍👍👍

[@turji]

@@Mymatevince Thank u, but i'm from Norway, guess il go for aliexpress then. Good video btw, have learned quite a few tricks from you over the years👍

[@AdrianHavirneanu]

Weren't you supposed to connect the power button when you tested your known good one with the bad mosfet? 😅

[@Mymatevince]

I was Adrian 🤣🤣🤣 messed up there!

[@jinxnatorx]

Yes another trying to fix video

[@QsTechService1]

Nice find ..especially getting false readings The bad one was reading a little higher .. For test meter Peak atlas DCA55 Component analyzer ... They build good Test meters Little pricey I bought years ago they have a new version out Check them out vince.... Money well spent Their capacitor tester is nice too

[@Mymatevince]

I'll Google it. Nice one 👍

[@QsTechService1]

@My Mate VINCE You can't go wrong I always use the capacitor tester Mainly I purchased mine about 10 years ago still working Strong It's a small business company I believe Good to support small businesses

[@Allretrocollect]

you can use a Dreamcast power switch to replace it, just desolder the whole switch from a Dreamcast switch and solder it back onto the Saturn switch cable as the Dreamcast power switch cable is too short

[@insideMan1981]

Nice job brother ❤

[@njl282]

I ended up getting ReSaturn or modern power board because it wasn't something I felt comfortable with.

[@DumahBrazorf]

Not a simple double diode indeed. The TOP202YAI is a PWM Controller and 700 V MOSFET in a 3pin package.

[@CLC-1000]

Amazing video.

[@Mymatevince]

Thanks CLC

[@CLC-1000]

@@Mymatevince You're welcome. Hope you are having a great weekend so far.

[@spazandies]

I upgraded to a ReSaturn due to the power board being cracked in delivery. Worth it though

[@alanbenson1505]

I'm not sure if my original comment posted, Vince. Get hold of a Peak DCA55, it would've more than likely picked up the fault.

[@erniecamhan]

Why didn't you check you had mains going in, instead of checking supply out

[@bathesheba111]

Please please Vince get an isolation transformer! One day despite your care you could accidentally touch the mains….a disaster!

[@drEmulatorMadmax]

another tip is to take all metal rings off when working with 240 volts

[@dungeonseeker3087]

Not sure if you did it off camera but you didn't actually prove the fault 100%, you never put a power switch on the second PSU, you had the first one bridged 🤣 Also RE loads, switching mode PSUs (if they have a bridge rectifier) are fine without any load, its only really an issue on linear PSUs (with a transformer).

[@Mymatevince]

I didn't even do it off camera....can't believe I missed that!!!!!😂

[@hoodlumrocknroll1]

I noticed something possibly missing on the nonworking power board before the octocoupler was removed. There is two holes, writing R-301 and the electrical wiring diagram 'resistor' symbol on the board. Based on that view, before going further in video, I think that resistor missing might be the problem. After seeing the MK 2 working board, that good has the same empty spot with same writing and diagram symbol, so my first thought was wrong.

[@brett9000]

I have always wanted a sega saturn but never been able to afford one and probably wont be able to now that I am unable to work and going through cancer treatment.

[@r4dius]

There's no power supply that can resist you :)

[@Lee-wu6dr]

You forgot to connect the switch to the working board???????????

[@Mymatevince]

I know!!! Schoolboy error there. The chip was definitely faulty though👍👍👍

[@Stefan_Payne]

...and now order a FENRIR for the Saturn and show how to put that in and have fun with an ODE :)

[@mandragor85]

23:40 it is not turned on by bridging the button so no you have not proven it ;)

[@RWL2012]

27:13 Game Over Yeahhh!!!

[@gingerninja7187]

Couldn’t work out why you needed to remove the power switch 🤷‍♂️

[@jrsc01.]

You didn't break the switch, you just happened to find a way not to remove the switch cover lol.

[@Mymatevince]

🤣👍

[@somersetretrogames]

Is anyone NOT sponsored by PCBway? Anyone? Beuller?

[@DEmma1972]

keeps it from the landfill

[@themealena817]

You oughta wear insulation gloves when dealing with high tension. Just saying.

[@djrkzr]

It looks like both models got the same motherboard revision as well😅

[@Mrfort]

The rolls royce of repairers!

[@soulmourne2698]

The boards in old stuff almost never break down couse they are built to last

[@CDOODY1999]

Saturn... thumbs up

[@jrsc01.]

Very Long Easy Right... Maybe. GAME OVER Yeahhhhhh.

[@hamood1234fool]

i bet the loose main wire caused the fault

[@ianhaylock7409]

To be this good takes ECNIV.

[@Jungleroomreptiles]

Look Ma I'm dancing

[@bufordmaddogtannen]

If only someone could invent some sort of resin that hardens as plastic once cured...🙄