Re: QW-MS3010D 30V 10A Variable PSU Blown MOSFET
Quote:
Originally Posted by RukyCon
I also found some 470uf 50v KZEs that i plan to put on the output, but i think they're NOS so i may have to reform them first (they still test within spec).
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How long did you have them in storage because I have had some that I have bought at least 5 years or more and have had no issues using them I have values from 0.47UF to 47000UF
One thing that I do power on the device at low load and leave it powered on for hours to at least 24 hours before turning the device off
Then use the device normally after this
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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
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
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 caps
Last edited by sam_sam_sam; 06-07-2020 at 06:38 AM..
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