Comments on: PWM IC Testing Method https://jestineyong.com/pwm-ic-testing/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sat, 10 Apr 2021 21:56:38 +0000 hourly 1 https://wordpress.org/?v=5.4.21 By: Fred https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-374066 Sat, 10 Apr 2021 21:56:38 +0000 https://www.jestineyong.com/?p=8341#comment-374066 Topic very instructive and helpful

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]]> By: Jestine Yong https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-362639 Sun, 22 Sep 2019 13:35:55 +0000 https://www.jestineyong.com/?p=8341#comment-362639 In reply to MARCO TAPIA.

Hi Marco,
If you want to check power primary side then you need to connect the scope ground (black lead) to hot ground. If you want to check the secondary side then you need to connect it to cold ground.

Jestine

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]]> By: MARCO TAPIA https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-362513 Thu, 19 Sep 2019 10:42:04 +0000 https://www.jestineyong.com/?p=8341#comment-362513 Very nice article,does the black lead of the scope go to hot ground or power supply ground, or does it go to negative lead of power supply which is different from the power supply ground.

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]]> By: Godfrey Agaga https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-312703 Sat, 22 Apr 2017 04:39:59 +0000 https://www.jestineyong.com/?p=8341#comment-312703 please I need the best handheld oscilloscope from: The specifications, the price and how to get it from nigeria

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]]> By: gourav https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-302635 Fri, 28 Oct 2016 02:37:48 +0000 https://www.jestineyong.com/?p=8341#comment-302635 hi owasis, i wanna make a circuit that tests many type of ic.
how can i prooceed. many types of ic like the most common used ic of 74 series
and or not nand nor gates

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]]> By: Raymundo Saura https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-224805 Sun, 07 Sep 2014 02:10:11 +0000 https://www.jestineyong.com/?p=8341#comment-224805 thanks sir for sharing

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]]> By: reza https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-223998 Wed, 03 Sep 2014 07:25:33 +0000 https://www.jestineyong.com/?p=8341#comment-223998 hello dear mr yong
you are very good man
you are master for me about Electronic Repair.
good luck

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]]> By: Robert https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-223050 Thu, 28 Aug 2014 18:39:59 +0000 https://www.jestineyong.com/?p=8341#comment-223050 In reply to Tim Stanford.

Hi Tim,
There are many people that come to this website and learn, but never contribute any articles themselves.

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]]> By: Tim Stanford https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-222941 Thu, 28 Aug 2014 03:27:51 +0000 https://www.jestineyong.com/?p=8341#comment-222941 I work on guitar amps and would like to see some tube amp theory. Some of the tube amps I work on have switch mode power supplies combined with tube technology. I also work on solid state amps as well.In fact my PA head broke down so I've got it on my bench . Its made by Yamaha its the EMX 512 powered mixer. It goes into protect mode as soon as I power it on. I've checked all of the final output xsistors and found no shorted out devices. But it still goes into protect mode.I'm hoping I can find the problem soon. Thanks for posting.

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]]> By: tesfaye kebede https://jestineyong.com/pwm-ic-testing/comment-page-1/#comment-222939 Thu, 28 Aug 2014 02:48:37 +0000 https://www.jestineyong.com/?p=8341#comment-222939 Thank you jestine your monthely news letter more useful for repairs and your e-book
have a nice day to you

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