Title: Problem with my Hantek2D42 [Print this page] Author: amy Time: 2020-11-16 15:36 Title: Problem with my Hantek2D42 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.
Reply
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.
[attach]3935[/attach]
Author: Huster Time: 2020-11-17 02:24 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.
Author: amy Time: 2020-11-17 11:00
Please replace them to try.
[attach]3938[/attach]
Author: Huster Time: 2020-11-17 16:33
But if they are the Problem than the voltmeter schould work, but it doesn't Author: amy Time: 2020-11-19 08:20
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. Author: Huster Time: 2020-11-20 17:07
ok What value is R44 in area 1? Author: amy Time: 2020-11-21 08:29
R44: 100R,1/16W,1%,R0603
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