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Old 09-12-2020, 05:52 AM   #32
sam_sam_sam
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Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
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Posts: 3,467
Default Re: DC Power Supply QW-MS605D

From what I can see from the video

Try this after you replace the parts that you found shorted if you still have the cycling problem

The fact that the current LED light is also flashing this could mean that you have some kind of issues with to much current being used at start up

Is there a way to disable the switching power supply from the rest of the circuit and just check the power supply its self

You will probably need to load the switching power supply output just look at the data sheet for switching power supply regulator and probably do about half of what it is rated for
__________________
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; 09-12-2020 at 05:59 AM..
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