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Tektronix MDO3014 failure, MDO3000 series
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m k:

--- Quote from: GridWork on February 07, 2021, 03:48:03 am ---The Web interface does work, however it only shows two channels.
--- End quote ---

What else it says, right or wrong model?

Is it old or new firmware?
GridWork:

--- Quote from: darkstar49 on February 07, 2021, 11:24:55 am ---
It won't solve your power issues, but at this stage, I'd already get in touch again with Tek, saying this upgrade was done upon their advice, and that you're now at least at a point where you could have the forced upgrade go through, although without success for the front-panel controller (the Freescale MCU on the 3rd pic). Maybe they could already give you some quote for fixing that part, don't know whether service centres are able to, but there surely is a way (JTAG...) to flash that MCU specifically, without swapping the board.

I'm really not a fan of Tek's approach to have a 'dumb' PSU delivering 12V, and provide all other voltages on the mainboard itself... had similar issues on a DPO4034 a while ago, and had to sell it pretty cheap after numerous (and unsuccessful) hours of troubleshooting... (have to say I'm not very at ease with such problems, being more on the software side).
 

--- End quote ---

The power issue is definitely not from the power supply, it stays rock steady at 12V during the reset event. Having a dumb power supply isn't so bad, it theoretically allows easy future replacement for what is likely to break during normal use. Power lines can get some crazy energies on them.

Tek isn't budging on the price to repair much. The only other option I was given was $230 an hour for a technician to troubleshoot + a mandatory $650 calibration fee, not much better. And to add insult to injury, the repair only has a 90 day warranty in either case. <GRRR>
GridWork:
The firmware is whichever version got loaded using the "forceinstall.txt" option.

If anyone out there has an MDO3000 series and happens to have a Freescale debug module, would you be willing to download the code from the microcontroller so that I can try and re-flash mine?

One of the other things I am noticing is that the quality of the assembly is not up to par for a mid level (and in this price range) oscilloscope. The hand soldered point do not have solder filling the hole, just a light surface fillet on the back side.
GridWork:
New update:
I spent most of the weekend trying to trouble shoot what's going on. So far here is what I know:

* The main application processor is being reset due to a global reset from the supervisor circuit.
* The supervisor is causing a reset because main voltage is dropping out.
* The voltage dropout is due to the power controllers on the mezzanine board shutting down.
* I am trying to route out where the shut down is coming from. The 1.8V controller "RUN" comes from the power good on the 5.0VD controller.
* It appears that something on the main board tells the AUX DC/DC controllers to start up, not sure where that is yet.
I will try and get some pictures posted of the board and attach to this message.
kcbrown:

--- Quote from: GridWork on February 08, 2021, 04:16:05 pm ---New update:
I spent most of the weekend trying to trouble shoot what's going on. So far here is what I know:

* The main application processor is being reset due to a global reset from the supervisor circuit.
* The supervisor is causing a reset because main voltage is dropping out.
* The voltage dropout is due to the power controllers on the mezzanine board shutting down.
* I am trying to route out where the shut down is coming from. The 1.8V controller "RUN" comes from the power good on the 5.0VD controller.
* It appears that something on the main board tells the AUX DC/DC controllers to start up, not sure where that is yet.
I will try and get some pictures posted of the board and attach to this message.

--- End quote ---

This is actually good news if I'm reading it right.  You might not need to re-flash the front panel controller after all, if it's being reset in the way you suggest.  Smells like a hardware fault.

The very first thing I'd look at is the actual voltages going into and out of the various voltage controllers, see how they vary over time.
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