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Dead OCZ Vertex 4 http://forum.hddguru.com/viewtopic.php?f=10&t=40629 |
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Author: | Lardman [ November 22nd, 2020, 4:53 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Take some continuity measurements around D1 and L7, C128 (other side) looks a little funny too. D2 top left looks like an LED. Anything getting hot. Can't do chip off on most SSD if it's anything more than a blow component you're going to need a pro. |
Author: | lcoughey [ November 22nd, 2020, 9:43 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Odds are, it is a translator issue that requires PC3000 SSD support. |
Author: | melvin [ November 22nd, 2020, 9:54 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Had one yesterday. It had shorted capacitor. If LED is off when you power it on, than search for shorted elements. |
Author: | PizzaAlways [ November 22nd, 2020, 13:05 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Thank you all for your replies. So I did some measurements, not on everything. I couldn't find C128 (even if I was able to fin C127 and C129 haha). When I test D2 on its extremities for continuity I don't have any signal, so I guess at least this one is dead if I'm correct. I didn't do much continuity test or anything else involving a multimeter, as I don't really feel confortable with it. I don't want to mess anything by injecting some current in the wrong places while testing for continuity. I feel like it could be something really simple, like a failing small component that doesn't let the current go trough (not the single led is emmiting light when plugged to a source a power), but I don't have the knowledge to solve this type of issue. I feel kind of dumb that asked for help here and doesn't feel confortable to do the testing by myself. Sorry about that. On a side not, the last time I plugged power to the ssd, I notices that two of the memory chips are gestting quite hot quite fast (I would say around 55°C), more than the other memory chips. I think I'll need to find a pro in France (or close) to solve this problem. Even if I know it could be a lot of work, I'm afraid a pro would bill me like 1000 eurso, and I can't afford it for now or the near future. Anyone know some good pro in France ? I saw some of them over the internet, but most of them had very bad customer reviews. I came across an enterprise called "Recoveo", anyone know about them ? Thanks again for everything. |
Author: | fzabkar [ November 22nd, 2020, 14:53 ] | |||
Post subject: | Re: Dead OCZ Vertex 4 | |||
Measure the voltages at the highlighted locations.
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Author: | PizzaAlways [ November 22nd, 2020, 16:37 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
I don't know why my previous message is still not appearing, but if it does after I post this one, you can pretty much ignore it. I was a bit depressed by my situation. My main concerned about measermants is my fear it could break something with the current injected during the mesure. Is it safe ? |
Author: | fzabkar [ November 22nd, 2020, 21:31 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
With the SSD disconnected from power, measure the resistances between ground (eg a screw hole) and each of the marked locations. Do this on the 200 ohms range of your digital multimeter. This procedure is perfectly safe, and your results will tell us if any component is shorted. The voltage measurements in my previous post need to performed with the SSD powered on. Don't bother with these until we have analysed your resistance measurements. |
Author: | PizzaAlways [ November 22nd, 2020, 22:13 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Thank you very much for you patience. One last question before I proceed with the measurements you asked me : is it a problem if my multi meter don't have a range selector ? It supposed to use the right caliber while I do my measurements but I just ask to be sure I'm not doing anything wrong. |
Author: | fzabkar [ November 22nd, 2020, 23:04 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Autoranging is fine. Not a problem. |
Author: | Lardman [ November 23rd, 2020, 4:19 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
PizzaAlways wrote: I feel like it could be something really simple, like a failing small component that doesn't let the current go trough (not the single led is emmiting light when plugged to a source a power), but I don't have the knowledge to solve this type of issue. The LED not being lit is a sign it's not getting any voltage fzabkar has identified components/places to measure which should tell you if the voltage is capable of getting to various parts of the circuit even if you're not actually sending any at the time. PizzaAlways wrote: I feel kind of dumb that asked for help here and doesn't feel confortable to do the testing by myself Don't worry about it - I feel like I'm poking at things with a stick to see what happens most day. especially compared the knowledge level here.
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Author: | PizzaAlways [ November 23rd, 2020, 14:21 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
So I did the measurements you asked for. At least I tried my best, I might have to invest in some thin measurement pin as the traditional one are quite big compared with the size of the components. Here are my results, if some seem odd to you, let me know, i'll do them again. L4 difficult, between 0 and 4 Ohm (shorted ?) L5 strange behavior goes up to 40 MOhm and down (shorted, error from me ?) L3 90 Ohm L2 14 kOhm L7 39 kOhm Thank you ! |
Author: | fzabkar [ November 23rd, 2020, 14:54 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
The supply at L4 does appear to be shorted to ground. You can confirm this by measuring the resistance between the ends of the adjacent capacitor (C64). Your next task is to find out which chips are powered from this supply. Choose one of the NANDs (29F64G08ACME3) on each side of the PCB and test the capacitors adjacent to it. Do the same for the Indilinx controller and Hynix SDRAMs. If the readings are unstable, you can scrape away some of the PCB lacquer from the solder joints with your probe tip. |
Author: | PizzaAlways [ November 23rd, 2020, 17:55 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Thank you. I'll try to measure L4 again to be sure I have a zero on this one. I'll mesure C64's resistance aswell. For the resistance on the three chips's do I measure them with one of my probs on them and the other to the groud or my two probes on both of their ends ? Other question : the strange behavior of L5 while measuring, is it normal ? Maybe because it is a capacitor ? |
Author: | fzabkar [ November 23rd, 2020, 18:06 ] | ||
Post subject: | Re: Dead OCZ Vertex 4 | ||
I suspect that your L5 measurements were affected by PCB lacquer or flux residue. As for the chips, they are surrounded by tiny capacitors with circuit references of the form Cnnn. You need to measure all the Cnnn components. There will be many which will test as short circuits. Measure the resistance of each Cnnn by attaching your probes to each end.
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Author: | PizzaAlways [ November 23rd, 2020, 21:47 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
I did the measurements you asked for : memory 1, photo 1, bottom left C301 0 C304 0 C257 0 C268 0 C258 0 C267 0 C60 0 memory 2, photo2, top right C176 0 C126 0 C127 0 C186 0 C177 0 C183 0 C113 0 Indilinx C217 0 C208 0 C216 0 C198 0 C193 0 C197 109k C57 0 C252 0 C243 0 C253 0 C87 0 C88 0 C89 0 C90 0 c95 0 C6 0 c7 0 Hynix SDRAMs C86 0 C87 0 C88 0 C89 0 C90 0 C99 0 C100 0 C82 0 C96 0 C95 0 C81 0 C85 0 C93 0 C92 0 C91 0 C71 (next to C92) 55k I reamesured L5 following you advice, it's 105kOhm If want me to verify one of this measure, just tell, as well as if you want some other. |
Author: | fzabkar [ November 24th, 2020, 16:31 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
I don't understand your results. :-( As I understand it, there are 5 power supplies. These are my guesses:
1.8V & 3.3V - NAND flash 1V & 2.5V - Indilinx controller One of these supplies is shorted. However, your latest results would suggest that at least 2, maybe 3, are shorted. That can't be right. :-? References: https://media-www.micron.com/-/media/client/global/documents/products/part-numbering-guide/numlegacynand.pdf?rev=b61c795c719149a8ad9b148e5643650a https://www.skhynix.com/product/filedata/fileDownload.do?seq=4276 (DDR3_H5TQ2G63BFR(Rev1.1).pdf) |
Author: | Lardman [ November 24th, 2020, 17:11 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
fzabkar wrote: I don't understand your results. As I understand it, there are 5 power supplies. These are my guesses:
1.8V & 3.3V - NAND flash 1V & 2.5V - Indilinx controller L2 - 2.2v L3 - 0.95v L4 - 1.5v L5 - 3.27v L7 - 4.8v From a vertex 4 drive but with a different layout. It's also from the 'fuck it bucket' (suspected shorted controller) so YMMV. |
Author: | fzabkar [ November 24th, 2020, 17:49 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
Thanks. What about L6? L4 (1.5V) provides power for the two SDRAMs. If they are the two chips which are becoming hot, then they may be damaged. If so, then the DC-DC converter would also be suspect. |
Author: | Lardman [ November 24th, 2020, 18:10 ] |
Post subject: | Re: Dead OCZ Vertex 4 |
fzabkar wrote: Thanks. What about L6? L6 - 3.28v |
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