Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
Since you are in Italy and you have 230V AC line voltage, the total *DC* voltage across the two big capacitors should be about 230 x 1.41421 = 325V DC. Thus, each cap should have about 160-170V DC across it, with or without the PSU turned On.
If you do, check 5VSB output (i.e. purple wire on ATX connector to ground.)
If no 5VSB, then the rest of the PSU won't work. Need to throubleshoot the 5VSB first. As stj suggested, it's probably a good idea to start a new thread and post pictures and any information there so that people don't get confused with the problems of the PSUs in this thread.
**EDIT**
I see you started a new thread here:
https://www.badcaps.net/forum/showthread.php?t=83829
Linking for anyone else that might be interested.
Will reply there too.
Annoying heavy load-failure in Tecnoware Free Silent 500W
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
with the power supply not turned on on the large capacitors I have the same voltage, theoretically it should be less or am I wrong in standby?Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
No, I have no output voltage, plus I noticed that the voltage on one of the large capacitors is much lower than 200V, it signals me about 100 volts with the power supply runningLeave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
a new thread would have been good,
so is the 5v standby working?Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
Hello everybody
I also have a problem with this power supply, unlike omega it just won't turn on and I don't have any output voltage, I replaced some capacitor that was open, I checked the shotty diodes on the secondary and I'm ok, try do you recommend me to do?Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
While crapacitors are always a risk, new platforms very often die because of another reasons than caps. And with warranty starting at 5 years for some platforms, it does not matter that much - not in this price range.
momaka: Italy is usually given as an example of the "best economics" in Europe so I somehow do not believe there are no good units in there. (however it is more like fascistic hell where you pay tax when you have two chickens on your own backyard, and we should also look at how much money flows from northern countries to southern countries, which only make more debts continuously). They may be expensive because taxation in there reaches 80-90 %, but that's their own problem…after all, they kept pigs as Berlusconi in power for decades. On their defense, situation is similar in all the other socialistic countries in Europe.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
I agree with you. But what applies to your locale may not apply to his. I've been to various places in Southeastern Europe, and I can tell you there are remote parts of the countries there that you literally have no choice - everyone is running crappy power supplies, and that's the norm. Getting parts is often cheaper than buying a reputable PSU. Not to mention gas prices - if you have to go to a city far away that sells those better PSUs, the cost of gas along is a big turn-off.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
I think I succeeded in finding it (that's the good news): at present the PSUs which have worked bad after fixing all have rail voltages, as measured by the program SpeedFan (v 4.51), which exceed 5% the nominal 12V, i.e. > 12.6V (+/-5% the nominal is it the specification you meant, right?).
SpeedFan mis-reports voltages on many of my computers, and I have quite a range of different computers, so the problem is not limited to one motherboard brand or model at all.
I think that may be due to the resistor R12 (470k) missing in some of the recapped PSUs (it has been factory cut, there are still soldered rheophores), probably to increase the then low 12V rail. Indeed, the recapping and replacement of the fast recovery diode with a Schottky one, have increased the voltage of about 200-300 mV, maybe going beyond tolerance. Since I got at home a tenth PSU to recapped and in this R12 is missing too, I measured 12V rail (under 21W load) before and after putting a 470k (still no recap) and found a lowering of 600 mV. Good!
Check the resistors I circled in red above in one of the "good" PSU and see how they compare (resistance-wise) to the ones in the "bad" PSUs.
Anyway, I still somehow don't understand how putting SO MUCH effort, time (=money), components (=money) and running such inefficient craps (=electricity=money) is better over buying new 350W 80+ (80+ Bronze) cheap units with 3year warranty. There are already shitloads of them in Europe and under competition pressure the warranties are getting longer even throughout mainstream and low-end.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
I told ya there may be voltage problems and that it may be better to use two superfasts rather than single schottky.
Anyway, I still somehow don't understand how putting SO MUCH effort, time (=money), components (=money) and running such inefficient craps (=electricity=money) is better over buying new 350W 80+ (80+ Bronze) cheap units with 3year warranty. There are already shitloads of them in Europe and under competition pressure the warranties are getting longer even throughout mainstream and low-end. So I bet even in lower mainstream, by the end of 2016 there will be units with 5y warranty.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
This to post bad and good news together
So far I recapped nine Technoware FAL501FS12 (just the secondary section), with replacement of the 12V rail diode as momaka suggested me, and had also time to test them "in the field" under stress load (100% CPU 24/7), as usual in my field of research.
The bad news is that some work, some not (namely I get the infamous ATAPI error 9 and 11). After checking the soldering of every "bad" PSU, have been trying for hours to give myself an explanation through a correlation and today I think I succeeded in finding it (that's the good news): at present the PSUs which have worked bad after fixing all have rail voltages, as measured by the program SpeedFan (v 4.51), which exceed 5% the nominal 12V, i.e. > 12.6V (+/-5% the nominal is it the specification you meant, right?). I think that may be due to the resistor R12 (470k) missing in some of the recapped PSUs (it has been factory cut, there are still soldered rheophores), probably to increase the then low 12V rail. Indeed, the recapping and replacement of the fast recovery diode with a Schottky one, have increased the voltage of about 200-300 mV, maybe going beyond tolerance. Since I got at home a tenth PSU to recapped and in this R12 is missing too, I measured 12V rail (under 21W load) before and after putting a 470k (still no recap) and found a lowering of 600 mV. Good!
Next week I will check at work if the correlation between ATAPI error and the lacking of R12 holds and fix the PSUs accordingly.
The bottom line: electronics repair may be either frustrating or funny, however all is best after one finds good teachers. Thanks to the group members and in particular to Momaka!Last edited by omega; 02-05-2016, 06:41 PM.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
I can also see that a place on the left of the red square you sketched is EMPTY. If I am remember, it is NOT missing, but this pic has been taken from one of the two PSUs with high voltage. I will check it soon. Anyway they appear to be 1% precision (namely hard-to-find) resistors.
One easy thing you can do, however, is take one of the PSUs that you fixed that has normal voltages and compare the resistors it has to the PSUs that have the abnormal high voltage condition. Let me know what you find out.
Also, don't worry that the resistors are 1% precision. You could use 5% too if the 5% resistor happens to measure within 1% accuracy. The manufacturer only used 1% so that they don't have to take time tweaking the PSU outputs if the outputs weren't exactly spot-on right.
. But for an old half-bridge design, you can assume the efficiency to be around 70% +/-5% most of the time and your results won't be too far off. If anything, you should get a pretty decent *estimate* of the power consumption - usually within 10% of what it is. I know that is not precise at all, but it does give you an idea more or less how much power your PC is using.
Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
I am talking about measuring output power with meter on input. That is guessing at best as you have no idea what's the efficiency of that thing. Compared to that, even cheap clamp meter with like +-3 % accuracy is still much more precise.
What the wall meter actually shows is even another, completelly different thing (which also affects the result, however).Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
Momaka, thanks you so much for the steady support!
nominal is the value which has been printed n PCB
before (after) recap is before (after) the cure, with 21W load (or no load).
It's a pity that I cannot attach a Table
I can also see that a place on the left of the red square you sketched is EMPTY. If I am remember, it is NOT missing, but this pic has been taken from one of the two PSUs with high voltage. I will check it soon. Anyway they appear to be 1% precision (namely hard-to-find) resistors.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
It does seem to be exponentially higher, if not exactly that and without exaggeration , it's easily about 230W alone, IIRC, when I saw one for x264, which was a CPU-only test...
3.0 OTOH seems to use exponentially less and that's why I use that for the system with my Halo CE server...
I think the 45 nm version is easier on the system...Last edited by RJARRRPCGP; 02-03-2016, 11:55 PM.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
... I'm talking about a 65 nm Core 2 Quad.Way before i-series!
http://www.anandtech.com/show/2303/4
65nm Kentsfield Q6600 are 95~105W TDP. 45nm Yorkfield Q9505 are about the same, 95W TDP.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
Most of the recapped follow the voltage schema depicted in post #56, however two PSU get following similar voltages:
nominal before recap, 21W after, 21W after, no load
12 V 12.4 V 12.7 V 12.9 V
5 V 5.5 V 5.4 V 5.4 V
5 VSB 5.1 V 5.1 V 5.1 V
3.3 V 3.4 V 3.3 V 3.4 V
–12 V –11.9 V –12.0 V –12.0 V
PG 5.4 V 5.3 V 5.3 V
I think the voltages are high with respect the average, am I wrong? any clue how comes and how to fix?
I think you *may* be able to fix that, if you're talking about the Technoware PSU revision in post #14. That one uses an SDC2921 PWM controller. This is its datasheet:
https://cdn.badcaps-static.com/pdfs/...1d9ec648b2.pdf
According to the typical application on page 9, it appears that pin 16 (VIN+) sets the voltage output through variable resistor "R2". With some tracing on your PSU, I believe the resistors circled in red in the picture below is what sets the output voltage.
https://www.badcaps.net/forum/attach...1&d=1454552789
All 3 of them appear to be in parallel, and that is what makes up "R2" on the SDC2921 datasheet. Can you please post the resistance values of each resistor? You will need to remove them out of the PSU if you want to measure them.Last edited by momaka; 02-03-2016, 08:30 PM.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
^ Nope you're misinformed RJARRRPCGP, it'll only draw ~135W @ 3.9 GHz. See here.
Even an i7-950 @ 4.2 GHz is ~50W short of drawing 250W:
I'm talking about a 65 nm Core 2 Quad.Way before i-series!
http://www.anandtech.com/show/2303/4
Mine required more Vcore than theirs for 3.3...Last edited by RJARRRPCGP; 02-03-2016, 07:40 PM.Leave a comment:
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Re: Annoying heavy load-failure in Tecnoware Free Silent 500W
Back to the main subject of this thread, now that I 've recapped nine PSUs FAL501FS12 I have some statistics of the voltages (most ATX are already under stress, I will let you know about the results). Most of the recapped follow the voltage schema depicted in post #56, however two PSU get following similar voltages:
nominal before recap, 21W after, 21W after, no load
12 V 12.4 V 12.7 V 12.9 V
5 V 5.5 V 5.4 V 5.4 V
5 VSB 5.1 V 5.1 V 5.1 V
3.3 V 3.4 V 3.3 V 3.4 V
–12 V –11.9 V –12.0 V –12.0 V
PG 5.4 V 5.3 V 5.3 V
I think the voltages are high with respect the average, am I wrong? any clue how comes and how to fix?Leave a comment:
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