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Title: Hantek 2D72 problems [Print this page]

Author: Jing Time: 2023-2-1 09:01
Title: Hantek 2D72 problems

Customer consultation

I have a Hantek2D72 and was having a problem with it. After turning the device on there is no displayed measurement value on the screen, the only thing that is displayed is the connection diagram and the measurement type. i have updated the firmware on it and this did not fix the problem. any help is would be appreciated.

Author: Jing Time: 2023-2-1 09:06

Reply

Is the measurement data of the multimeter not displayed? Don't all the gears of the multimeter show? If there are other problems, please provide relevant videos for our better reference.

Author: Satur9 Time: 2023-7-6 02:21
I have the same issue. Attached is a picture of the display. The Scope and AWG functions work fine. It is just the DMM has no value displayed, even 0. I have updated the firmware and the problem persists. I am willing to replace components if it is a hardware issue. I could not find any user replaceable fuses.

Author: Jing Time: 2023-7-6 15:58
Edited by Jing at 2023-7-6 16:01

Satur9 replied at 2023-7-6 02:21
I have the same issue. Attached is a picture of the display. The Scope and AWG functions work fine. ...

Dear Sir，
Please follow the following figure to test.

Author: Satur9 Time: 2023-7-6 23:57
I checked the crystal and it is definitely not operating correctly. Attached is an image of measuring it with another scope. I also couldn't detect any voltage across C46.

Author: Jing Time: 2023-7-7 15:25
Edited by Jing at 2023-7-7 15:27

Satur9 replied at 2023-7-6 23:57
I checked the crystal and it is definitely not operating correctly. Attached is an image of measurin ...

Dear Sir，You can replace a 4M crystal oscillator.
Test again for 1,2 in the figure below. 1 is DC voltage, 2 is AC voltage, see if this transformer has 3.5V.

Author: Satur9 Time: 2023-7-14 01:04
This is the measured value on the transformer side you labelled 1

Author: Satur9 Time: 2023-7-14 01:04
This is the measured value on the transformer side you labelled 2

Author: Satur9 Time: 2023-7-20 22:29
I'm at a loss here. Not sure what components to replace. It definitely seems like some components that manage these oscillations have failed and need to be replaced. Without making a detailed schematic breakdown and modelling, I'm not sure which ones.

Author: Jing Time: 2023-7-25 14:02

Satur9 replied at 2023-7-20 22:29
I'm at a loss here. Not sure what components to replace. It definitely seems like some components th ...

Dear Sir,
Would you like to replace 4M crystal oscillator? Is there a multimeter that can test the above mark 1 and 2?

Author: Satur9 Time: 2023-8-19 01:46
@Jing replaced the crystal with a 4MHz 18pF one and am still experiencing the issue. I borrowed another multimeter and measured the two outer terminals of position 1 on the transformer in your earlier image and there was 0V across them. Why would a transformer be fed 3.5V DC voltage?

Author: faizal_padet Time: 2024-3-16 11:46

Jing replied at 2023-7-7 15:25
Dear Sir，You can replace a 4M crystal oscillator.
Test again for 1,2 in the figure below. 1 is DC ...

I've got only 1.1V at C46. Please help, what component should I check..?

Author: ramseymorgan690 Time: 2024-3-17 05:14
I borrowed another multimeter and measured the two outer terminals of position: People’s Choice Awards 2024 Lainey Wilson Fringe Leather Jacket

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