Comments on: Malfunction Of LM324 SMD IC Caused No Output In V-GUARD Voltage Stabilizer Model VG50 https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Thu, 09 Oct 2025 07:44:59 +0000 hourly 1 https://wordpress.org/?v=5.4.21 By: Parasuraman S https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454299 Thu, 09 Oct 2025 07:44:59 +0000 https://jestineyong.com/?p=36100#comment-454299 In reply to Yogesh Panchal.

Thanks!

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]]> By: Yogesh Panchal https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454259 Wed, 08 Oct 2025 11:24:04 +0000 https://jestineyong.com/?p=36100#comment-454259 Good Job! Sir

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]]> By: Parasuraman S https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454244 Mon, 06 Oct 2025 10:14:06 +0000 https://jestineyong.com/?p=36100#comment-454244 In reply to Waleed Rishmawi.

Many thanks, dear friend!

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]]> By: Waleed Rishmawi https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454237 Mon, 06 Oct 2025 07:55:28 +0000 https://jestineyong.com/?p=36100#comment-454237 hi, never encourtered such a device but I leared something today. thanks for sharing and have a blessed day

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]]> By: Parasuraman S https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454219 Sun, 05 Oct 2025 04:03:29 +0000 https://jestineyong.com/?p=36100#comment-454219 In reply to Mark J.

Many thanks, dear Mark!

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]]> By: Mark J https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454212 Sat, 04 Oct 2025 18:36:44 +0000 https://jestineyong.com/?p=36100#comment-454212 Parasuraman once again great job on the repair.

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]]> By: Parasuraman S https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454199 Sat, 04 Oct 2025 10:51:27 +0000 https://jestineyong.com/?p=36100#comment-454199 In reply to Albert van Bemmelen.

Many thanks for your expert comments and very useful link, which I refreshed and read my comments too, dear Albert!

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]]> By: Albert van Bemmelen https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454197 Sat, 04 Oct 2025 10:11:11 +0000 https://jestineyong.com/?p=36100#comment-454197 The LM324 is a quad OP-AMP IC consisting out of four high gain amplifiers. And they easily can be tested in simple to make Opamp tester circuits. However the smd chip size being not DIP or DIL size requires us to use a smd to DIP adapter. How to make such adapter that is not available anywhere is explained in my old article here:

And Opamp testers are now cheaply available and also can easily be made from standard parts. Just like testers that test the special Comparator opapms (which normally can't be tested in normal only Opamp testers!).

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]]> By: Parasuraman S https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454188 Sat, 04 Oct 2025 05:34:06 +0000 https://jestineyong.com/?p=36100#comment-454188 In reply to Tayo.

Yes, sometimes troubleshooting drives us crazy! Many thanks for your comments and sharing your experiences!

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]]> By: Tayo https://jestineyong.com/malfunction-of-lm324-smd-ic-caused-no-output-in-v-guard-voltage-stabilizer-model-vg50/comment-page-1/#comment-454183 Sat, 04 Oct 2025 02:57:30 +0000 https://jestineyong.com/?p=36100#comment-454183 Good to have friends in high places! This ICs are impossible to diagnose and you would have been going around in circles (thinking it was good) if your friend didnt advise you to replace it. I had a similar (but larger) IC saga sort of like you had here. I checked everything and checked it twice. After 2 weeks everyone involved threw in the towel and concluded it was the IC at fault. It was specialized so I had to just order a whole new board but it was a good experience.

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