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650 Watt ATX Power Supply Shutdown Problem Solved
Another good friend brought me yesterday his defect model TX-650W ADVANCE desktop PC Power Supply.
As soon I tested it with both my ATX testers it was off in a split second after turning it on.
It had a large Fan (with blue led lighting) which helped killing any sound/noise plus Thermo-Control. After opening the case I noticed all bad E-caps inside that were bulged already. And the Power Supply was controlled by a 14 pins UTC 339 and a 16 pins UTC 7500 chip.
On previous photo the 220uF Electrolyte Capacitor C24 is visible that had exploded completely out of its outer cap. And all 5 other bulged and leaky E-caps.
After I replaced all 6 of them (C24 to C29), I gave the Supply another test run with both my ATX testers. Below photo shows my ATX tester with 5 Load resistors and only the -5V led is off because there isn’t any -5V voltage present. So the 650 Watt Supply clearly works just fine again!
And next photo shows the easy to read ATX Power Supply tester in action.
I only used a couple of spare E-caps I salvaged from other devices. And so another successful repair ends after again spending almost no costs or time. The bulged smelly E-caps I threw in the special chemical waste box to save the environment from getting more polluted.
My friend will be very pleased that he doesn’t need to buy another expensive replacement PSU for his big tower PC. Which I am sure is another good thing for our mutual environment.
Albert van Bemmelen, Weert , The Netherlands.
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Note: You can read his previous repair article in the below link: