Hi, I have a FSP Epsilon 600W computer PSU which had a bunch of bad caps, so I replaced them thinking they were the problem but the PSU still doesn't work. i don't have 5V standby and shorting the PS_ON to GND also doesn't turn it on. Fuse is ok and I get some inrush when plugging in. Does anyone know about any known faults in this series of PSUs?
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you may have missed a small cap - fsp like to put heatshrink tubing over them sometimes and shove them against heatsinks -
Please show us the front and back of this switching power supply
I would also agree with this as well
Was this switching power supply in storage for a long time meaning that it was “new old stock” if this the case you should replace every single capacitor that is less than 100uf and any capacitor that shows any signs of leaking or bloated ( pop the the top of the capacitor or leaking out the bottom of the capacitor ) of any kind
I have bought these FSP power supply before and found that just about every capacitor was bloated or leaking from the bottom of the capacitor or the top of capacitor where the logos are stamped on the top of the capacitorLast edited by sam_sam_sam; 07-19-2024, 05:38 AM.Comment
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While replacing the bad output caps was necessary, your problem is in the 5VSB circuit. Without 5VSB, shorting PS_ON to Return will do nothing. stj's comment is worth exploring. If there is a 47uF or 100uF (or similar low value) capacitor in the 5VSB circuit, that may be the problem cause. Those can go bad without looking bad visually. Also look to see if the standby regulator is getting voltage. No input voltage means no output voltage. If there is a high ohmic value resistor between the high voltage and the standby regulator, it may be open-circuit.i don't have 5V standby and shorting the PS_ON to GND also doesn't turn it on.PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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Yes, everyone was right. I thought that the small caps didn't need replacing since most of the stuff that I've recapped didn't need those changed. I changed all the caps, not just the ones that were visually bad and that fixed it.Comment
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Hello sir,
Standby voltage is must, it should need to present
so you try to rectify first the standby voltage issue then I'll be find I thought...
thank you so much sir.Comment
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Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm
And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,... -
When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
Rubycon YK DataSheet (b... -
a few days ago I finally purchased mser-100 v2 and I tested its abillity of measuring ESR value.
I found that It shows pretty accurate ESR value for electrolytic capacitor,But When I measure polymer capacitor of dreamcast game console,I found that one third of polymer capacitor's ESR value is more than twice the value of ESR meter table.(for example, I measured one polymer capacitor of 6.3v 100uf, It showed ESR value of 7.68)
Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?...
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