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Title: 6074BC power up problems. [Print this page]

Author: SpongeDon Time: 2019-3-27 04:03
Title: 6074BC power up problems.
Edited by SpongeDon at 2019-3-27 05:28

Help,

I purchased a 6074BC, Loaded the Software and Driver on to my laptop. I then plugged in both USB(type A) into my laptop. The scope was showing only noise so I hooked up a probe to Ch1 and clipped onto the Cal output. A nice square wave resulted, and no problems to this point. Today I set up the scope to use it and can't seem to get it to work. I also noticed that the power led on the front panel of the scope wasn't lit today. It doesn't matter what sequence of hookups of the scope to the laptop, I never get the front led indication and no waveforms. I tried the whole procedure again on another laptop and I get the same failure(problem). Is there some kind of reset for the unit or procedure? The CH1-4 inputs have only been attached or probed the cal output of the unit at this point, so an overvoltage isn't possible. Both laptops show that A 6000 series is attached to the USB port. A little background, I'm a EE and Sr. Software Engineer with 30+ years experience, I'm not blowing my own horn, I'm trying to relay that you might not have to hold my hand t. Any ideas, or fixes? I've spent a good 5 hours on this problem. Thank you in advance, Don

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Author: amy Time: 2019-3-27 10:42
At first, you need connect the red and black connectors of USB cable to your computer.
When you connect the scope to your computer, what is the device name in device manager?

Author: SpongeDon Time: 2019-3-27 11:26

amy replied at 2019-3-27 10:42
At first, you need connect the red and black connectors of USB cable to your computer.
When you conn ...

Hi Amy, thank you so much for your help. Yes, the cables were attached to the USB ports of the laptop I set the software up on. The original install and a second laptop I tried it on also. The Device Manager showed Hantek 6000B. The odd part is that it worked great when I first set it up, and the laptop wasn't used again until I went to bring it up again. Just to double check the power of the two USB connectors, I used a self-powered USB 2 HUB as the last test.

Author: amy Time: 2019-3-28 09:09
So now the software and oscilloscope are still not connected success?
When you open the software, is there "searching device" showed on the bottom left corner of the software?
It is recommended that you refer to the document to uninstall driver. And install driver again.
[attach]2717[/attach]

Author: SpongeDon Time: 2019-3-28 15:37

amy replied at 2019-3-28 09:09
So now the software and oscilloscope are still not connected success?
When you open the software, is ...

Hi Amy, I went through the procedure you requested and then reloaded the driver. I'm getting the same symptoms as before.  Let me explain in steps:

1. with DSO plugged into USB ports. I start scope.exe --> and I get no result on screen except if I open Task Manager I see scope.exe*32 is running.
2. IF I unplug the DSO USB ports, the scope program comes up on screen. Bottom left says' "Searching Device"
3. If I then plug back in the DSO USB ports, The program doesn't change state. Bottom left says' "Searching Device"
4. IF I go FILE->Connect, The program closes and in task manager I see no scope.exe*32 running.

The LED by channel 1 is never on.  I looked inside the plug of the DSO where it says USBX1 and I see a little light on when the USB is plugged in.

The driver has been reinstalled on two different machines.  Each time the Software says "Searching device.  Also, I pulled off the rubber plug that says USBX1 and I can see a light inside that is on.

Where do I go from here? I need the scope up and operational now.

Author: amy Time: 2019-3-28 16:08
Please connect a 5V@2A adapter to the red connector of the USB cable to try.
And what is the version of the software you used?

Author: SpongeDon Time: 2019-3-28 16:42
Edited by SpongeDon at 2019-3-29 04:33

Ok, I tried hooking up a USB 5v@2A adaptor and saw no change to the previous steps.
SW version info: Hantek-6000 Ver2.1.36 - [Scope1]
About Scope window reported
Software Version: 20160628
Driver Version: 01007402
FPGA Version 0
PCB Version:
Product SN:

It's still failing, what do I do now?

Author: amy Time: 2019-3-30 08:33
Measure the voltage of the four points, and check whether the voltage is consistent with the mark.
[attach]2721[/attach]

Author: SpongeDon Time: 2019-3-30 09:42
Edited by SpongeDon at 2019-3-30 09:52

All were normal except TP12, it measured 0.00 or technically 0.07VDC.
file:///C:\Users\dlmeyers\Pictures\Inked1_LI.jpg

Author: amy Time: 2019-4-1 14:51
The hardware should be fault.
If you can solder, please replace the two compunents(U19 and U907) on the other side.The model is LM3671MF(X)-ADJ,SOT23-6.
[attach]2723[/attach]

Author: SpongeDon Time: 2019-4-1 21:32
Hi Amy, I have no problem replacing the components. I need you to verify the model number for the chips because I can't source them. I can, however, source LM3671MFX-ADJ/NOPB,SOT-5 which seems to be the correct part number. On the board in your picture U19 and U907 are both 5-pin chips, and on physical board, the two devices are also 5-pin. Whereas SOFT23-6 is a 6-pin package. According to TI's datasheet, they do make a SOT-6 but Mouser Electronics and Digikey don't carry it.

Mouser Part #926-LM3671MFXADJNOPB
Digikey Part #296-37575-1-ND

Thank you, Don

Author: amy Time: 2019-4-2 09:13

SpongeDon replied at 2019-4-1 21:32
Hi Amy, I have no problem replacing the components. I need you to verify the model number for the c ...

Please check the motherboard version number or take a picture of the mainboard for me to see.

Author: SpongeDon Time: 2019-4-2 20:39
ok, picture attached. I also sent you a close up of the devices. notice the center pins are missing. Oh, and u19 doesn't look pretty anymore.

Author: SpongeDon Time: 2019-4-3 21:06
Hi Amy, I'm still waiting for your response. Is there any way we can please complete this in a timely manner?

Author: OASJ2YSeeEhBQo1 Time: 2019-4-5 10:00
Hi Don,

Sorry to jump in but, I notice in the picture of your board that UB907 is marked SBTB, U19 is probably the same but that IC is clearly busted and it's not possible to see the marking. Anyway, according to TI's datasheet those are LM3671 in a 5 pin SOT-23 package, so the ones you find on Digikey or Mouser are correct.

Author: SpongeDon Time: 2019-4-6 03:17
Hi OASJ2YSeeEhBQo1,
Thank you for jumping in. It looks like you came to the same conclusions as I did, I just wanted support to double check. I really can't believe I'm going to have to fix a brand new piece of equipment. Does everyone have problems with this company? They don't respond to emails, PM's or anything, the phone number they give doesn't work for me. I honestly can't figure out how they stay in business, personally, I'll avoid their equipment and recommend the same to others. I wish I had a schematic of the circuits in that area before I repair the board just to double check things. Anyway, thanks again and take care.

Author: amy Time: 2019-4-8 09:10

SpongeDon replied at 2019-4-6 03:17
Hi OASJ2YSeeEhBQo1,
Thank you for jumping in. It looks like you came to the same conclusions as I di ...

Sorry to reply you so late. We spent the Qingming holidays.
On your board, the two compunents(U19 and U907) model is LM3671MF(X)-ADJ,SOT23-6.
You can try to replace them.

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