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 wellOriginally posted by stj View Post
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.9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
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6 De-soldering Station Switching Power Supply 1 Power Supply
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15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had
CAPs POOF
All of the mosfet that are taken out by bad capsComment
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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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