Products > Test Equipment

USB controller FAILED TEKTRONICS TDS2014C

(1/3) > >>

Till_Ulenhpigel:
Greetings friends! I have a problem with the TEKTRONICS TDS2014C oscilloscope. When turned on, self-diagnosis is carried out and an error occurs when testing the USB controller.  I was able to update the firmware from 24.09 to 24.17. But newer firmwares cannot be installed (24.18, 24.26). I am following the instructions for the firmware and use a USB flash dongle 2gb. How can I fix this problem? I was unable to find later firmware versions. Probably the problem is with the hardware controller CY7C67300?

kcbrown:
Despite the USB self-test failing, does the USB port work anyway?

If not, then it's something you will have to address. 

The service manual (https://download.tek.com/manual/TDS2000C-TDS1000C-EDU-Service-077044602_RevA.pdf) isn't of any help here, save for that it notes that the USB interfaces are powered by a separate regulator ("A second three-terminal regulator provides USB power to preclude USB faults from seriously disrupting operation of the oscilloscope.", page 25 of the service manual).   So the first thing you should do is make sure that regulator is supplying power.

After that, then yeah, you're probably going to have to replace the USB controller.   It's unlikely in the extreme that the issue here is with the firmware, particularly since you successfully flashed it (presumably in response to this problem).  However, just in case, I have to ask: was it passing the USB self-test immediately prior to when you flashed the firmware?

tautech:
USB self-test fail was the first symptom something was wrong with my TDS2012B.

Turned out one pin on the 100 pin USB controller IC was corroded through yet all you could see was a black spot in the pin until prodding it with a fine screwdriver and the corrosion fell off leaving the pin and it's pad unconnected. If you are lucky there's enough of the pin left to solder to with a tiny bodge wire however on mine there wasn't. It might be possible to Dremel back the plastic IC package to permit soldering to more of the remaining pin however it's very delicate work that as yet I haven't tried.

As these DSO's are convection cooled and have topside venting contaminants can fall through the vents onto the PCB and if humidity is sufficient any contaminants can start a process of corrosion.
This happened to mine and some years back the price of the 100 pin SMD USB controller was some $30 and then you still had to flash it ..... if you have a replacement data dump and the gear to do so.

So it sits in the box where it has for some years ....maybe to never work again.

Till_Ulenhpigel:

--- Quote from: kcbrown on January 09, 2021, 10:37:13 pm --- However, just in case, I have to ask: was it passing the USB self-test immediately prior to when you flashed the firmware?

--- End quote ---
Thank you. I had the same problem with the USB before updating the firmware. Before flashing, the oscilloscope detected the USB flash drive, but it did it from the twentieth time. I was able to upgrade, but during the update process an error occurred, only the boot menu became available. I made many attempts to recover using 8 sticks ... in the end I installed version 24.17. And now the oscilloscope does not see the USB flash drive at all.

Till_Ulenhpigel:
Thanks for the advice! I will definitely check all the contact pads with a microscope. Are you sure that the controller needs to dump?

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod