Comments on: The Answer For The AVR Question https://jestineyong.com/the-answer-for-the-avr-question/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Fri, 05 Oct 2012 15:09:14 +0000 hourly 1 https://wordpress.org/?v=5.4.23 By: Jestine Yong https://jestineyong.com/the-answer-for-the-avr-question/comment-page-1/#comment-130132 Fri, 05 Oct 2012 15:09:14 +0000 https://www.jestineyong.com/?p=1554#comment-130132 In reply to aurelio.

Hi Aurelio,

The power ic can't be tested using multimeter to check if it is ok or not. But if you have the ic datasheet you can check the vcc and ground pin to see if it is shorted or not. You can try remove the power ic and retest to see if the fuse will blow again or not. You may also use the series light bulb trick to save the fuse. Google for series light bulb trick and you will get what I mean.

Jestine

Likes(0)Dislikes(0)
]]> By: aurelio https://jestineyong.com/the-answer-for-the-avr-question/comment-page-1/#comment-129839 Thu, 04 Oct 2012 21:25:03 +0000 https://www.jestineyong.com/?p=1554#comment-129839 Hi Jestine,
Thank you for answering regarding the right isolation transformer.
By the way, This is now my first attempt to repair an smps. The fuse blown but the bridge rect. is good and I don't know how to test the power IC indicating  "top 223y" cause its not in the ebook testing ecomponents. Can you tell me how to test this IC?
Thank you and hoping your reply
Aurelio

Likes(0)Dislikes(0)
]]>