Comments on: Blown Varistor But Mosfets Were Good https://jestineyong.com/blown-varistor-but-mosfets-were-good/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 12 Dec 2021 20:19:51 +0000 hourly 1 https://wordpress.org/?v=5.4.21 By: Neil https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-378031 Sun, 12 Dec 2021 20:19:51 +0000 https://jestineyong.com/?p=22636#comment-378031 In reply to Robert Lamparter.

Great post, Gives me hope.
How did you determine the parameters of the Varistor? Were the numbers still visible?
I have a similar problem on a plasma cutter. Blown varistor, presumably saved the rest of components. Miller welders told me its a 580V 410J but didn't say anything else like ac dc or vrm. Could I use a slightly different varistor perchance?
Any help or comment is greatly appreciated

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]]> By: Robert Lamparter https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370593 Wed, 19 Aug 2020 02:27:34 +0000 https://jestineyong.com/?p=22636#comment-370593 I really enjoy reading your reports on repair of welding machines. What causes generators to kill welders?

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]]> By: Ulises Aguilar pazzan i https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370563 Mon, 17 Aug 2020 19:02:41 +0000 https://jestineyong.com/?p=22636#comment-370563 good job

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370553 Mon, 17 Aug 2020 10:13:28 +0000 https://jestineyong.com/?p=22636#comment-370553 In reply to ivan.

Ivan: you are most welcome. have a blessed day

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370552 Mon, 17 Aug 2020 10:13:02 +0000 https://jestineyong.com/?p=22636#comment-370552 In reply to Henrique J. G. Ulbrich.

Henrique: you are most welcome. the power generator is what caused the varistor to blow. it actually protected the machine from any further damage.have a blessed day

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370551 Mon, 17 Aug 2020 10:10:33 +0000 https://jestineyong.com/?p=22636#comment-370551 In reply to Parasuraman S.

Parasuraman: you are most welcome my friend. thanks for sharing your articles with us as well. have a blessed day

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370550 Mon, 17 Aug 2020 10:09:46 +0000 https://jestineyong.com/?p=22636#comment-370550 In reply to Yogesh Panchal.

Yogesh: thanks man. have a blessed day

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370549 Mon, 17 Aug 2020 10:09:17 +0000 https://jestineyong.com/?p=22636#comment-370549 In reply to ANTHONY PATERSON.

Anthony: I am glad to hear that. I know the welder is fine when I see the light coming on, voltage reading at the output terminals and I always test the machine for confirmation. sometimes it comes on and there are voltage readings at the output but sometimes with that present the welding does not take place because of voltage dropping. so I always test the machine to make sure all is well. have a blessed day

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]]> By: Waleed Rishmawi https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370548 Mon, 17 Aug 2020 10:06:04 +0000 https://jestineyong.com/?p=22636#comment-370548 In reply to Albert van Bemmelen.

Albert: I appreciate your comment. have a blessed day

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]]> By: ivan https://jestineyong.com/blown-varistor-but-mosfets-were-good/comment-page-1/#comment-370536 Sun, 16 Aug 2020 19:04:22 +0000 https://jestineyong.com/?p=22636#comment-370536 Thanks sir

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