Electronic Engineer Discuss

Title: 6254BC no signal displayed [Print this page]

Author: Point_Less Time: 2020-5-4 23:05
Title: 6254BC no signal displayed
Edited by Point_Less at 2020-5-5 18:14

Hello!
I own a Hantek model 6254BC USB oscilloscope connected to a Windows 10 x64 ver 1909 computer, and today I have run into a problem with it.
When I run Hantek6000 software, it starts ok, but there is no graph line on the screen for any channel. Selecting AUTO mode does not do anything, and reset to firmware defaults in menu too.
"Connect" lamp blinks orange in the software, and green on the oscilloscope. When I turn voltage range knob I hear internal clicking sounds from oscilloscope, means connection is OK. And software shows "Connected" in lower left corner.
All I have tried to do so far to resolve this issue is:
- close and restart software - did not help;
- restart computer - did not help;
- power down all devices for a few minutes and power them up again - did not help;
- reinstall software and drivers, not deleting driver, from my own downloaded some time ago file version 2.2.2 - did not help; - delete device driver too until yellow (!) DSO Device shows in device manager, and reinstall driver again - - did not help;
- use another computer with Windows 10 x64 ver 1707 where oscilloscope never was used berfore, and install software downloaded directly from your website (it installs Hantek6000 ver.2.2.5 software and Hantek 6000B 3.4.7.0 date 11.09.2017 driver) - did not help;
- also tried drivers from this forum post (it gives a Hantek6000B(CDE) USB device), but is not working either;
- also tried drivers from this forum post (it gives a Hantek6000B device), but is not working too.
So, as for now - still no luck, there is no graph line in software.
"About" dialog shows this:
Software version: 20160628
Driver version: 20160531
FPGA Version: D001
PCB Version: V1.06
Please advise me how to get my oscilloscope working back, I need it to do work!

Author: Point_Less Time: 2020-5-8 17:09

Any engineers or representatives of Hantek here? I need help with your production, please!

Author: amy Time: 2020-5-11 11:44
Have you performed self-calibration? Is there an error message？

Author: Point_Less Time: 2020-5-11 15:22
Edited by Point_Less at 2020-5-12 13:46

amy replied at 2020-5-11 11:44
Have you performed self-calibration? Is there an error message？

Yes, I have tried to run self-calibration. There is still no signal displayed in the software (I remember that device should start clicking and signal moves from bottom to top of screen).
I can select any channel 1-4, but after I press calibrate button, I hear a single click, then software waits about 5-7 seconds and then an error dialog "Error: Over Time !" pops up.

Author: Point_Less Time: 2020-5-21 04:11
Any suggestions? Hello again! I need help!

Author: ying Time: 2020-5-21 15:00

Point_Less replied at 2020-5-21 04:11
Any suggestions? Hello again! I need help!

Please click right mouse "My Computer->Device Manager" to send us a screenshot to study.

Also, you can send email to support@hantek.com

Author: Point_Less Time: 2020-5-22 04:28
Edited by Point_Less at 2020-5-22 15:53

Sorry that screenshot is not english, hope it is understandable.

Author: Point_Less Time: 2020-5-30 02:20
Any suggestions, please?

Author: wangshuang Time: 2020-6-1 14:28
If the status in the left corner is "Connected", please check if the "Trigger Sweep" is AUTO.

Author: Point_Less Time: 2020-6-2 22:46
Yes, status in left corner is "Connected". Trigger sweep is AUTO. Still no signal displayed.
Here is a screenshot.

Author: wangshuang Time: 2020-6-3 08:46
You need to check if voltage point is normal. File size is limited. Please contect me by email, my address is wangshuang@hantek.com

Author: Point_Less Time: 2020-6-4 16:01
Edited by Point_Less at 2020-6-4 16:02

wangshuang replied at 2020-6-3 08:46
You need to check if voltage point is normal. File size is limited. Please contect me by email, my a ...

Thanks for your help, wangshuang!

In my case 1.8v DC DC converter IC was broken. Since it is 600 mA current only, it can be replaced by simple linear LDO DC DC like 1117-1.8 easily, there is pretty much free space around to place it. Just desolder original broken IC.

Now the oscilloscope works again, thanks again for help!

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