arfows Posted August 7, 2023 Report Share Posted August 7, 2023 (edited) Got a dead XBOX 1.6 for cheap, it was super clean but had been previously opened so I was a little wary of what I'd find inside. Power supply fuse was missing and the attached pic is the soldering butcher job i found. I'm not familiar with 1.6 PSUs, and couldn't find any quality pics of one online to see what the layout is supposed to be, so i'm wondering if there is any saving this? Don't know what continuity (if any) is supposed to exist between the 3 points there. The bottom round hole is where the fuse is supposed to attach. Worried that the damage/solder spill shorted or created unwanted continuity but can't tell since I don't know how it was originally. The brown lines are what appears to be scratches as if someone tried to scratch away solder to keep the points separated? I dunno. If it is fixable, was wondering what could have caused the fuse to blow that necessitated the repair attempt, as in are there any usual suspects I should look/test for on the Power supply? The rest of the Power supply looks fine. The mobo had some bad caps so i went ahead and replaced the 5 usual ones there but other than that no visible defects on either the mobo or power supply. Any help or thoughts on power supply layout and downstream test/checks would be greatly appreciated. Thanks! Edited August 7, 2023 by arfows clarity Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 7, 2023 Report Share Posted August 7, 2023 I would be a bit concerned as it looks like someone has started to try and fix it Can you post a pic of the other side? Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
arfows Posted August 7, 2023 Author Report Share Posted August 7, 2023 (edited) Here are some better pics. Edited August 7, 2023 by arfows add pic Quote Link to comment Share on other sites More sharing options...
Galindrada Posted August 7, 2023 Report Share Posted August 7, 2023 I would replace the fuse and try to start from there, at least to see if it works. It is possible that the fuse has due to an external current peak or something. Quote Link to comment Share on other sites More sharing options...
Galindrada Posted August 7, 2023 Report Share Posted August 7, 2023 But that's some weird job from the previous owner , it seems that somehow he has shortened those 2 points with pour soldering and then tried to scratch that bridge. Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 7, 2023 Report Share Posted August 7, 2023 What model PSU Fuses don't blow for no reason is the Xbox a 100-120 volt version? Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 7, 2023 Report Share Posted August 7, 2023 Holy shit. On the first pic it's hard to tell where the original bridges were and where they WEREN'T. I would look at the underside of a good PSU online and see where it's linked with solder and where it's NOT. That'll prevent it from working right there... If it's not fried already from misdirected current. Quote Link to comment Share on other sites More sharing options...
arfows Posted August 7, 2023 Author Report Share Posted August 7, 2023 (edited) Thanks for the thoughts thus far. Its 100-127v 96DP. I've been looking for a clear pic of a PSU online and think I finally found one but its hard to tell if the three solder points are touching/have continuity. I have one T4A250V fuse but don't want to blow it (is there such a thing as circuit humor?) on something unless I have reasonable confidence that it'll work. Thoughts? Edited August 7, 2023 by arfows add pic 1 1 Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 8, 2023 Report Share Posted August 8, 2023 That fuse has violently blown and I suspect it's been connected to 220 volt. There is a part in the black heat shrink that's probably blown The layout of components of the 220 volt version is different but you may find the PCB reference numbers are the same. It should have Z1 in the board, It's a Metal Oxide Varistor that's used for Surge Protection On a 220-250volt supply it's rated at 275volt AC and above that it blows up and will go short circuit and that blows the fuse,The heat shrink is because they have been known to explode and have sparks escape. I suspect it will have a part number like TVR 10 241 or TVR 10 221 on the component Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
arfows Posted August 10, 2023 Author Report Share Posted August 10, 2023 so if I'm understanding you correctly between the fuse and varistor, that should have stopped the voltage spike from getting to other parts of the board. If i remove the circled item (varistor), test it, and it fails then potentially replace it and the fuse once continuity between the three points has been determined. If it doesn't fail, then the fuse blowing could be potentially something else on the board. Does that all sound right? Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 10, 2023 Report Share Posted August 10, 2023 16 minutes ago, arfows said: so if I'm understanding you correctly between the fuse and varistor, that should have stopped the voltage spike from getting to other parts of the board. If i remove the circled item (varistor), test it, and it fails then potentially replace it and the fuse once continuity between the three points has been determined. If it doesn't fail, then the fuse blowing could be potentially something else on the board. Does that all sound right? I wonder how often power goes into things that destroy them and make repairing the initial cause pointless... That would be really frustrating when it comes to electronics repairs: Cascading damage... Not that I'm saying you should stop. Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 10, 2023 Report Share Posted August 10, 2023 1 hour ago, arfows said: so if I'm understanding you correctly between the fuse and varistor, that should have stopped the voltage spike from getting to other parts of the board. If i remove the circled item (varistor), test it, and it fails then potentially replace it and the fuse once continuity between the three points has been determined. If it doesn't fail, then the fuse blowing could be potentially something else on the board. Does that all sound right? The varistor should test open circuit if it's good and if it test's dead short then replace it as it's done it's job. Also test the two points it was soldered too and with out the varistor it should not test short circuit but it may give you a reading that slowly increases in resistance. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. 1 Quote Link to comment Share on other sites More sharing options...
arfows Posted August 10, 2023 Author Report Share Posted August 10, 2023 Removed and tested the varistor. Still has continuity and it's solder points on the board do slowly increase in resistance. As you can see from the image, whatever happened was a pretty intense event so I also removed J18 (turns out it still has continuity and resistance though so appears undamaged?) and the coil. So in tracking all of that, except for the coil, which I'm not sure how to test, it appears everything else is still functional so far? Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 10, 2023 Report Share Posted August 10, 2023 13 minutes ago, arfows said: Removed and tested the varistor. Still has continuity and it's solder points on the board do slowly increase in resistance. As you can see from the image, whatever happened was a pretty intense event so I also removed J18 (turns out it still has continuity and resistance though so appears undamaged?) and the coil. So in tracking all of that, except for the coil, which I'm not sure how to test, it appears everything else is still functional so far? I have seen worse damage. If the Varistor ( Z1 )is testing a short then it's faulty. The resistance reading increasing when you test where Z1 (Varistor) was fitted is normal as you meter is slowly charging the main filter cap. The varistor is basically across the mains input just after the fuse and if it sees a voltage above it's nominated rating (for a PSU from Australia the varistor is 275 volt AC) it will self destruct and go short circuit and that will cause the fuse to blow. When I am testing devices that have had damage like that PSU or devices I am unsure of I power the device though a 100watt incandescent light globe (google Dim Bulb Tester) and if the globe stays fully lit then there is still a problem. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 10, 2023 Report Share Posted August 10, 2023 Wow, what was over the burn marks? What got hit? Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 10, 2023 Report Share Posted August 10, 2023 28 minutes ago, Bowlsnapper said: Wow, what was over the burn marks? What got hit? 220 volt in a power supply made for 110 volt and 90% of that black will clean off with some Isopropyl. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 11, 2023 Report Share Posted August 11, 2023 2 hours ago, SS_Dave said: 220 volt in a power supply made for 110 volt and 90% of that black will clean off with some Isopropyl. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Wow... I wonder how far it got and what it fried? Was it just the fuse and got stopped there?... Theoretically I suppose? Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 11, 2023 Report Share Posted August 11, 2023 4 hours ago, Bowlsnapper said: Wow... I wonder how far it got and what it fried? Was it just the fuse and got stopped there?... Theoretically I suppose? I think the only real damage is the Varistor and the Fuse The giveaway was the fuse that taped to the heat sink and then the black around the Varistor If it was me I would replace the fuse then plug it in with a 100 watt incandescent lamp (Dim Bulb Tester) in series with the active and see if it works and then replace the Varistor. Powering on a 1.6 supply without the mother board is a little bit harder but it's still doable See my post here. https://www.ogxbox.com/forums/index.php?/topic/11497-xbox-16-doesnt-turn-on-at-all-it-seems-dead/#comment-56162 Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 11, 2023 Report Share Posted August 11, 2023 14 minutes ago, SS_Dave said: I think the only real damage is the Varistor and the Fuse The giveaway was the fuse that taped to the heat sink and then the black around the Varistor If it was me I would replace the fuse then plug it in with a 100 watt incandescent lamp (Dim Bulb Tester) in series with the active and see if it works and then replace the Varistor. Powering on a 1.6 supply without the mother board is a little bit harder but it's still doable See my post here. https://www.ogxbox.com/forums/index.php?/topic/11497-xbox-16-doesnt-turn-on-at-all-it-seems-dead/#comment-56162 Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. I would never even think of it being possible to power on a PSU without a motherboard. I guess the mobo signals are simplistic enough and easy enough to reproduce? Black nipple is a varistor? It looks like a gigantic ceramic capacitor with insulation or something. Lol Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 11, 2023 Report Share Posted August 11, 2023 1 hour ago, Bowlsnapper said: I would never even think of it being possible to power on a PSU without a motherboard. I guess the mobo signals are simplistic enough and easy enough to reproduce? Black nipple is a varistor? It looks like a gigantic ceramic capacitor with insulation or something. Lol Yes the varistor is a bit like a ceramic capacitor in appearance. Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
arfows Posted August 11, 2023 Author Report Share Posted August 11, 2023 (edited) Looks like it might be something more or that soldering mess on the underside of the board might be the issue. DBT lights up. On the plus side, I learned about and got to build a DBT! Pretty cool and handy device Edited August 11, 2023 by arfows clarity Quote Link to comment Share on other sites More sharing options...
SS_Dave Posted August 11, 2023 Report Share Posted August 11, 2023 58 minutes ago, arfows said: Looks like it might be something more or that soldering mess on the underside of the board might be the issue. DBT lights up. On the plus side, I learned about and got to build a DBT! Pretty cool and handy device Is the globe full brightness or 1/2 brightness ? And is that with just the PSU or the hole Xbox? Cheers SS Dave Soft modding is like masturbating, It gets the job done but it's nothing like the real thing. Quote Link to comment Share on other sites More sharing options...
arfows Posted August 11, 2023 Author Report Share Posted August 11, 2023 just the psu. if globe means light bulb it seemed pretty bright. thanks again for all the help with this Quote Link to comment Share on other sites More sharing options...
Bowlsnapper Posted August 11, 2023 Report Share Posted August 11, 2023 9 hours ago, arfows said: just the psu. if globe means light bulb it seemed pretty bright. thanks again for all the help with this Nah, he was talking about a map. JK! So full glow means what @SS_Dave? Quote Link to comment Share on other sites More sharing options...
MadMartigan Posted August 12, 2023 Report Share Posted August 12, 2023 I’ve been watching this thread and kept failing to mention that I have several spare 120V PSUs. I am however in the US. I have zero need for them over here. Let me know if any of you gents across the pond are interested in a bulk purchase. Quote Link to comment Share on other sites More sharing options...
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