The capacitors in the PSU?

0 like 0 dislike
18 views
I'm not going to be like the authors of such posts (something recently on habré became fashionable to write about how to resolder the capacitor) and not going to write a topic about how I perepaev a couple of capacitors and sapav a few contacts revived computer PSU.


In General, it was swollen in BP 2 x 10V capacitor 1000mkf. At hand was not the same and I soldered in their place 1000mkf x 16V and 25V x 1000mkf (so what has been soldered). Common sense dictates that nothing bad will happen and everything will work well, but the information on the Internet about this varies. I would like to ask the experienced and smart abrollsoftware what are the consequences of such a replacement?


And another question. The PSU is earned and feels good, but the output voltage a bit high (12.28 and 5.13), but stable — subsidence and fluctuations is not observed. Load — Mat. Board miniITX and hard disk. How dangerous is it for components?
asked by | 18 views

7 Answers

0 like 0 dislike
Each chip has a certain "margin of safety", in other words - the difference, within which all the components of the schema work fine (a simple example - the lamp "Ilyich", designed for 220-240V.). Now you expose them a certain influence, which is slightly above the nominal indicators (12.28 instead of 12 and 5.13 instead of 5, although of course that power supply is not producing exactly 5 and exactly 12V).
The basic characteristic of capacitor is the capacitance. In Your case it has not changed. The idea is that everything should work, but I'd play safe and went to a radio parts store...
answered by
0 like 0 dislike
Now you expose them a certain influence, which is slightly above the nominal indicators

\r
The idea is that everything should work, but I would play safe

Captain, paralogistic.
answered by
0 like 0 dislike
About stress: according to the specification tolerances of +5 and +12 V ±5%, i.e. a maximum of 5.25 and 12.6 V, you have everything in order.
answered by
0 like 0 dislike
capacitors can be put with great features (16 vmesto 10, 25000 UF instead of 10,000 UF etc.), but not Vice versa. So that's all right.
answered by
0 like 0 dislike
The voltage written on the capacitor shows essentially his margin of safety. Will give higher his strikes. You just increased the "margin of safety" capacitors, and nothing more. If you Google on the topic of power supply units to put capacitors with a supply voltage recommended almost everything, the only limitation here is the stock better to make reasonable, because the greater voltage capacitors, usually larger and more expensive.
About the increase in capacity is the Council correct in relation to the filters of power supplies, but not in other cases (say, if you significantly change the capacitance of the capacitor in the crossover of the speakers, you change the cutoff frequency and probably mess up the sound). In a traditional transformer power supply (not familiar with the pulse) the capacitor absorbs the ripple, there by increasing the capacity increases and the pulsation suppression, but at the start significantly increases the current of the primary charging of the capacitor.
answered by
0 like 0 dislike
On the motherboard you can put electrolytic capacitors of smaller capacity. Checked. I instead put 1800 3300 mkf/ A voltage careful. The fact that the capacitor at 25 volts during discharge gives 25 volts. If you replace the capacitor on the 6.3 V in cond. 25, the possible failure of the motherboard capacitor discharge at shutdown. Well, if the protection type of the Zener diode, varicap... And if not... Definitely a failure of the motherboard.
answered by
0 like 0 dislike
The Chinese put a 16V in PSU 1000мФ conduci because they are cheaper, in fact if you put on 25V 1000мФ nothing will happen, just konyukov will be more headroom for peak voltage. For example a standard 16V 1000мФ vzbivayte or sometimes explode not only from peak voltages, but the temperatures in the PSU. I also put kondukov 25V instead of 16V and BP is still living longer than before failure.
answered by

Related questions

24,509 questions
45,932 answers
0 comments
398 users