Comments on: Spec of ATX Power Supply https://jestineyong.com/spec-of-atx-power-supply/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Tue, 01 Sep 2009 13:34:54 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: admin https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-3338 Tue, 01 Sep 2009 13:34:54 +0000 https://www.jestineyong.com/?p=878#comment-3338 HI GC,

Fan rotates and stop is one of the most toughest problem to locate because the cause can be in the primary or secondary. Have you check the components in the primary side. What about the optoisolator circuit ? For your information you need to connect an adequate load for the SMPS to work. Without load sometimes the fan will rotates and stop.

Jestine

Likes(0)Dislikes(0)
]]> By: gcmyadav https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-3334 Tue, 01 Sep 2009 08:02:35 +0000 https://www.jestineyong.com/?p=878#comment-3334 Hi Yong,

I regularly read ur articles about servicing. They are very helpful in many cases which can't be repaired by me without reading those articles even though i have circuit diagrams and servicing manuals. Currently I am repairing ATX SMPS which is quite new aroung 4 months and sparingly used total of around 100 hours in these 4 months. It suddenly died and now when PW switch pressed SMPS fan just rotates and then dies. Every time i tried it is in same condition. I checked all condensors in secondary and looks good. Can u help me, I want to try a hand on it.

Thanks.

Likes(0)Dislikes(0)
]]> By: admin https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-3294 Sat, 29 Aug 2009 09:45:59 +0000 https://www.jestineyong.com/?p=878#comment-3294 Hi Jan,

Sorry i do not carry any schematic diagram for power supplies.

Jestine

Likes(0)Dislikes(0)
]]> By: jan https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-3290 Fri, 28 Aug 2009 06:01:28 +0000 https://www.jestineyong.com/?p=878#comment-3290 Hi Jestine, nice sites, really. I´d like to ask you, if you could send me some schematics for ATX 300W power supply.
For the repair, it is a must and I cannot find any. Thank you very much. Best, Jan

Likes(0)Dislikes(0)
]]> By: admin https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-842 Wed, 14 May 2008 14:00:30 +0000 https://www.jestineyong.com/?p=878#comment-842 Hi,
It could be the surrounding resistors or capacitors have problem. I came across resistors open circuited and capacitor shorted that caused power good turned into 0 VOLT. Try change the IC’s, it could also cause the problem too. By the way, what is your name?

Jestine

Likes(0)Dislikes(0)
]]> By: nowdaygood https://jestineyong.com/spec-of-atx-power-supply/comment-page-1/#comment-841 Wed, 14 May 2008 13:55:21 +0000 https://www.jestineyong.com/?p=878#comment-841 Dear Jestine
I repaired a lot of ATX power.But now I repairing 1 ATX : Grey wire PG ( power good) =0, Grey Violet=5v .It not work with mainboard.I replace all capacitor but not work.I see IC TL494 and LM393.Difficult.
Will I doing now ? Help me.
Have a good day.
Bye.

Likes(0)Dislikes(0)
]]>