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DSO4072C Both channels BAD.

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Post time 2018-7-11 19:10:23 | Show all posts |Read mode
Hello.

I bought an hantek DSO4072C from a seller from ebay.
It was working good but after few days both channels went bad.
Seller dont answer my  messages and left me alone with the scope.

When I press Autoset button both channels turn on with a lot of noise, specially the CH2.

I can solder and replace components, just tell me what to replace and part numbers, if you can.
Can anybody help me, please?

Thank you.

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Post time 2018-7-13 08:08:31 | Show all posts
Hello  you can try this :Remove the probe    Press Utility button----Self Calibration---Confirm  then wait for a monent,  Restart  the machine. Good luck for you.

Sorry for my bad English

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 Author| Post time 7 day(s) ago | Show all posts
Thank you for your help Newbee.
Unfortunately I tried it but if hangs on 13/38 forever.
I will try to send it to somebody who represents Hantek.
This cheap chineese oscilloscopes are more a toy than a tool.
My hitachi V212 analog one resists to ervery abuse I subject it.

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Post time The day before yesterday 09:07 | Show all posts
X-Blade replied at 2018-7-14 05:35
Thank you for your help Newbee.
Unfortunately I tried it but if hangs on 13/38 forever.
I will try t ...

Sir, in your picture, did you input any signal to the channel?

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 Author| Post time Yesterday 05:16 | Show all posts
Hello amy.
Yes is connected to the internal 1khz output on the panel.
It acts like there is no ground connected.
Very strange.
It started to do this after i was measuring an inductor SRF  without caution or some problem related to the common ground.
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