Spanner Posted December 30, 2017 Share Posted December 30, 2017 (edited) I had not used it in a while and went to use it 2 days ago and nothing...very odd,it can break cos its not been used in a while,wow...I have had it for over 20 years. I need to get a replacement and I don't know where from,Its a 9V AC power Supply,I was thinking,I have a Acorn Electron that is powered by 19V AC,I couldn't find the Power Supply for it so I found out you can use a 19v DC instead,and it works fine...so what I am asking can you do the same with the disk drive,use a 9V DC instead..cos its must turn the 9v AC into DC inside the drive. What you think..?? Here is a photo of it,so everybody know what it looks like for history... and no I will not be putting it in the bin.Still keep it... It reminds me of the transformer that came with a model railway,like Hornby.. I havn't had much luck with my Atari,this is dead and my SIO2PC/10502PC Dual USB has stopped working too,maybe they are connected in someway,I don't know,maybe had a short in the socket on the drive and blown the PSU and SIO2PC Dual..???? Edited December 30, 2017 by Spanner Quote Link to comment Share on other sites More sharing options...
Paul Westphal Posted December 30, 2017 Share Posted December 30, 2017 For the 1050 : Best Electronics : Part # CO14795 also works on 850 810 Quote Link to comment Share on other sites More sharing options...
guus.assmann Posted December 30, 2017 Share Posted December 30, 2017 Hello Spanner, You cannot use a DC power supply. The 1050 needs 12V DC as well. This is done by a voltage doubler, also containing a capacitor. That part will not work with DC. Maybe the transformer can be repaired. It has a fuse inside, consisting of two pieces of wire, soldered together with some low temp solder. Replace this one. Or resolder it, using only flux and a clean soldering iron-tip. BR/ Guus 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted December 30, 2017 Share Posted December 30, 2017 (edited) For the 1050 : Best Electronics : Part # CO14795 also works on 850 810CO17945 is the 120V supply, looks like his was 240V outside of North America. There was another thread recently a guy in Australia looking for a compatible 9VAC output. I'd call up some local Electronics shops and see if they have something. It needs to have at least a 3 amp output which is less common. Keep the barrel connector end of the existing cord, just in case you need to replace the connector on whatever replacement you find with the old one. Edited December 30, 2017 by Nezgar Quote Link to comment Share on other sites More sharing options...
+slx Posted December 30, 2017 Share Posted December 30, 2017 Amazon usually carries some 9V AC PSUs for music equipment which have the correct plug for Ataris. There's a "Rockpower" unit rated at 2.1amps which according to hardware guru tf_hh posting on the ABBUC forum is strong enough for a 1050 which he measured to use 1.4A on spin-up with the stepper moving. Not sure if they're available with UK plugs, at worst you'll have to add a converter plug for a couple of Euros. I'd try to look inside before ordering. AC PSUs are pretty hard to break. Here's a link to the German post: Re: 1050 läuft und läuft... Quote Link to comment Share on other sites More sharing options...
Level42 Posted December 30, 2017 Share Posted December 30, 2017 Sadly Guus is exactly right....thenvoltage doubler is the killer of the idea of simply supplying DC.....else it would have worked.... Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted December 30, 2017 Share Posted December 30, 2017 the barrel plug always needs to be in the drives before plugging in to wall, the common failure is a fuse blowing when plugged to wall before plugged to drive... poof just drill out the four corner holes bend any tabs and pull apart then you replace fuse put case back together and either rivet or screw closed.. all will be well 1 Quote Link to comment Share on other sites More sharing options...
Spanner Posted December 30, 2017 Author Share Posted December 30, 2017 Thanks,Will have to take it apart then,it looks like the bottom has seems around the edge,is the plastic easy to melt,maybe do it with a hot knife ,as hot as a soldering iron,does it have epoxy in it,is that why it heavy..? Quote Link to comment Share on other sites More sharing options...
+slx Posted December 30, 2017 Share Posted December 30, 2017 (edited) tf_hh also published instructions on how to convert 1050's to 12V/2A DC input (like PSUs for external 3,5" HD enclosures) in ABBUC magazin 108. I don't know if these are available in Englisch, however. Apparently the mod results in the drive running cooler. (It looks rather simple. A couple of parts are removed and replaced by a few bridges.) Edited December 30, 2017 by slx 2 Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted December 30, 2017 Share Posted December 30, 2017 tf_hh also published instructions on how to convert 1050's to 12V/2A DC input (like PSUs for external 3,5" HD enclosures) in ABBUC magazin 108. I don't know if these are available in Englisch, however. Apparently the mod results in the drive running cooler. (It looks rather simple. A couple of parts are removed and replaced by a few bridges.) Any copy of this online? Quote Link to comment Share on other sites More sharing options...
gilsaluki Posted December 30, 2017 Share Posted December 30, 2017 Open it up!! I have replaced fuses before. Quote Link to comment Share on other sites More sharing options...
+slx Posted December 30, 2017 Share Posted December 30, 2017 Any copy of this online? It's on the ABBUC webpage, but I suppose that's for members only. Maybe the best idea is to PM tf_hh who invented it and ask if he's willing to share it outside ABBUC. 1 Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 15, 2018 Author Share Posted January 15, 2018 (edited) Here are the insides of it,whats the fuse the blue thing,and what the black thing soldered to the neural (Brown) line.Looks like some kind of Transistor..? Edited January 15, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted January 15, 2018 Share Posted January 15, 2018 (edited) If I remember correctly, ones a thermal fuse the others a current fuse.... I'll have to take a look when I can see pictures Edited January 15, 2018 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 15, 2018 Author Share Posted January 15, 2018 (edited) Why can't you see the pictures,any thing I can do..?? Can I bypass the fuses..? Edited January 15, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted January 15, 2018 Share Posted January 15, 2018 (edited) thermals a sandwiched or chip like, current rated fuses typically glass or ceramic tubes sometimes with heat shrink around them... I can't see your pictures because I am text only at the moment... not your fault, it's mine.. Edited January 15, 2018 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
JR> Posted January 15, 2018 Share Posted January 15, 2018 Current fuse in the blue shrink tubing, Chip is thermal. Test both for continuity/resistance. If either shows no continuity, it's the culprit. 1 Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 15, 2018 Author Share Posted January 15, 2018 (edited) The chip has no continuity and blue fuse dose have continuity,so its the chip then,checked it with my multimeter..? Can i bypass the chip fuse..? Edited January 15, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
JR> Posted January 15, 2018 Share Posted January 15, 2018 Yep, replace it and you should be good to go. Can test the rest of it first by bypassing the fuse if you want, but don't leave it plugged in too long....especially if it catches fire....lol Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 15, 2018 Author Share Posted January 15, 2018 OK I test it soon. Anyone know where I can get a replacement for the chip fuse from..? Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted January 16, 2018 Share Posted January 16, 2018 (edited) There should be a temperature rating on the fuse.... just do a search for thermal fuses and make sure it of sufficient voltage/current rating.... these were for fire safety. They do go bad... easy and cheap to fix. 5A 250V maybe 115 degrees not sure but it should be there somewhere Edited January 16, 2018 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
StarquestMan Posted January 16, 2018 Share Posted January 16, 2018 Looks like the fuse is rated for 113 degrees C at 5A 250V. Not sure of a good source in the UK for these but when I google those specs I get lots of results for them and ill bet if you really wanted to you could pull one out of another transformer or an old fan motor these are often thermally fused too. 2 Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 16, 2018 Author Share Posted January 16, 2018 (edited) Yep just tested it and my drive is working.. so just need that fuse,thanks eveyone. Well now at leased you have photos of the inside of one of these power supplies now.. Its weird how that fuse went,cos thats to the plug mains so did it get a short from the mains or something or was it time for it to say bye bye... ?? Oh what is this fuse called.. Thermal Cutoff Fuse ...??Can I use the tube version like the fuse on the other side of the PSU cos thats a Thermal Fuse too,well they come like that too...? Found some here, https://www.ebay.co.uk/sch/i.html?_odkw=113+C+at+5A&_osacat=181829&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.X113+C+at+5A+250V.TRS0&_nkw=113+C+at+5A+250V&_sacat=181829 Need help getting the right please.. Edited January 16, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 16, 2018 Author Share Posted January 16, 2018 (edited) What would happen if I put a thin bit of wire there as a fuse or bypass the fuse,can the transformer catch fire...??? I have bypassed it to test it and my 1050 disk drive come on and works but only had it on for about 10 seconds.Dose the disk drive draw a lot of power then for the transformer to get hot,When it was working ok the transformer was only warm ish only. My Atari PSU for my 130XE feels warmer. Edited January 16, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
Spanner Posted January 16, 2018 Author Share Posted January 16, 2018 (edited) Here is a closeup of the thermal fuse.. Its made by UMI I think,anyone know where to get one from in the UK..?? I am looking on eBay and all I can find is tube fuses and 113c 10A 250V,does it matter if its 10Amp not 5Amp...?? Edited January 16, 2018 by Spanner Quote Link to comment Share on other sites More sharing options...
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