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Problem with my Hantek2D42

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Post time 2020-11-16 15:36:27 | Show all posts |Read mode
Customer Consultation


About 1 and a half year ago, I bought my Hantek2D42 and it worked very nice until today.
I accidentally messured 500mA with the mA Channel (200mA Fused) and got a crack sound.
After that the the whole DMM does not Show any Values. The oszilloskop works quit fine.
I hope we can somehow fix the Problem.


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Please check if there is any component burnt in the area marked 1 first. If so, please take a picture for me. If not, need to replace U4 in the area marked 2.
The model of U4 is CS7721. If you cannot find CS7721, you can use FS9721 instead.







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Post time 2020-11-17 02:24:50 | Show all posts
Edited by Huster at 2020-11-17 02:29

In area 1 R44 is burned and on the other side there are the marked parts burned.


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 Author| Post time 2020-11-17 11:00:12 | Show all posts

Please replace them to try.



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Post time 2020-11-17 16:33:16 | Show all posts
But if they are the Problem than the voltmeter schould work, but it doesn't

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 Author| Post time 2020-11-19 08:20:58 | Show all posts
Huster replied at 2020-11-17 16:33
But if they are the Problem than the voltmeter schould work, but it doesn't

If DMM doesn’t show any value, then U4 should also be broken.

The model of U4 is CS7721. If you cannot find CS7721, you can use FS9721 instead.

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Post time 2020-11-20 17:07:13 | Show all posts
ok What value is R44 in area 1?

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 Author| Post time 2020-11-21 08:29:00 | Show all posts
R44: 100R,1/16W,1%,R0603
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