Comments on: Electronic Repair Questions/Answers and Testimonials- Part 23 https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Mon, 27 Jul 2015 08:29:51 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Jestine Yong https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-117195 Mon, 03 Sep 2012 12:16:43 +0000 https://www.jestineyong.com/?p=1562#comment-117195 In reply to jojogreg.

Hi Jojo,

It could be either the eeprom or the MCU data have corrupted because no signal was send to trigger the start circuit thus there was no 12 volt supply to the inverter ic.

Jestine

Likes(0)Dislikes(0)
]]> By: jojogreg https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-116719 Sun, 02 Sep 2012 01:05:54 +0000 https://www.jestineyong.com/?p=1562#comment-116719 Hi jestine,
I have a problem troubleshooting AOC monitor 16" wide screen when plugging-in the power cord to the power outline the LED power indicator light already without pressing the power button and this monitor has power but no display..I did measure voltage at the pico fuse connected to supply inverter board found 12volts but no voltage measure at the input TL494I Inverter IC..can you pls.advise what i do next..
thanks,
jojogreg

Likes(0)Dislikes(0)
]]> By: admin https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-4713 Sat, 20 Feb 2010 15:48:58 +0000 https://www.jestineyong.com/?p=1562#comment-4713 Hi Kedmy,

Try lm2468t instead.

Jestine

Likes(0)Dislikes(0)
]]> By: Kedmy Aroche https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-4712 Sat, 20 Feb 2010 06:24:38 +0000 https://www.jestineyong.com/?p=1562#comment-4712 Dear mr. Justine
i have a crt motitor with lm2469t chip broken, but i don find any replacement, the NTE online cross reference dont find any equivalent, you can help me.

thanks

pd/ sorry but my bad english

Likes(0)Dislikes(0)
]]> By: admin https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-2359 Fri, 13 Mar 2009 00:01:56 +0000 https://www.jestineyong.com/?p=1562#comment-2359 Hi Ashish,

Yes the best book for your staff is the http://www.TestingElectronicComponents.com

Jestine

Likes(0)Dislikes(0)
]]> By: admin https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-2357 Thu, 12 Mar 2009 23:59:57 +0000 https://www.jestineyong.com/?p=1562#comment-2357 Hi Ashish,

You need the data sheet of the ic and you can find it from the internet, .Look for the ground pin.

Jestine

Likes(0)Dislikes(0)
]]> By: ashish jain https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-2355 Thu, 12 Mar 2009 12:43:18 +0000 https://www.jestineyong.com/?p=1562#comment-2355 Dear sir,
How to check a 6 or 8 leg IC for output?
Keep one probe on one out pin and other on.......(which is common or 0 V pin)

Likes(0)Dislikes(0)
]]> By: ashish jain https://jestineyong.com/electronic-repair-questionsanswers-and-testimonials-part-23/comment-page-1/#comment-2354 Thu, 12 Mar 2009 12:38:18 +0000 https://www.jestineyong.com/?p=1562#comment-2354 Dear Mr Justine,
I have a started a workshop to repair Jasic inverter welding mc from Shenzen china.
As my staff is new to electronics.Do you have special book for troubleshooting the problems in inverter welding machine? or any book for guiding the user how to test diff electronic components especially IC,votageregulaor IC,optocoupler,mosfet aand inductors.Please reply asap

Likes(0)Dislikes(0)
]]>