Wrong power output

[Mola9850]

Hello
Just take a new netonix WS-10-250-AC with v1.4.6, which has an error on port 8 it sends 47V out , even if it is only set to 24v in the switch and it cost me Rocket 5AC airPrism before I found out what the problem was. and I've tried to reset switch and subject to 1.4.2 with the same result and after upgrad again with 1.4.6 with the same result.

[sirhc]

That is an indication that the MOSFET circuit is either defective or damaged.

Ironically this happened to me last night while working with a new WS-26-400-IDC in the LAB but in my case it was from damage. I sort of accidentally shorted the cable in the port which damaged the MOSFET circuit and caused 48V to be ON all the time. I was trying to measure isolation and connected the wrong probe wire to the rail and ZAP. The switch rebooted but then the Port 1 MOSFET was damaged and possible the Transformer. I left it at Julian's workstation to repair hopefully today.

I have seen a defective MOSFET circuit before which was caused by a solder bridge during the assembly process of the board most likely from a worn or dirty solder mask but 99.9% of the time that would be caught at testing phase if it was defective.

You're going to have to RMA it and we will see, if the MOSFET circuit was shorted there will be damage to the circuit and if it was a solder bridge the excess solder needs removed.

This can happen if you apply 48V to a 24V device as the device frys and shorts the MOSFET on the port. It all depends on how the circuit damages itself.

[Julian]

Usually (as was the case with the 26-400-IDC I worked on this morning) when you get a cable fault, the overcurrent takes out, in this order: The current sense resistor, the current sensor, the MOSFET, and in rare cases, the IC that gates the mosfets on.

If the cable fault and overcurrent remains, you will smoke the transformer, then the surge protection diodes, and finally, the PHY on the SOC itself. In most cases when that damage occurs, the rest of the SOC goes along with it, which basically turns your switch into a paperweight.

at any rate, I need to take a look at your particular switch before I can provide specific enlightenment. Typically this symptom is the result of some sort of misapplication (like Chris's >:|), but I have seen the rare case (<.01% of new build boards) where a solder bridge was the cause of this.

Hate to hear that one of my babies has shuffled off this mortal coil. Can we get this switch back for failure analysis and repair, please?

[Mola9850]

Hello again sorry for the late reply, but has been busy, believe it is too expensive to senden it back, it will probably cost me $ 100 to send it to the U.S.A. and it is the only port 8 is not working the rest seems fine. and wrote only two posts info.

[sirhc]

You could send it back postal mail?

But if we [Netonix] continues to grow and RF Armor stays up I am thinking about putting in a warehouse and repair facility in the EU maybe late this year or early next year.

[Taigar]

Hello,

I also have a couple of broken switches. 1x WS-12, 1x WS-8, 3x WS-6.

If I send them back to the USA (from the Netherlands) it will cost me a lot.
When they are repaired ans shipped back, it will also cost me customs fees.
Because these are not warranty repairs, I also have to pay repair costs. ( I understand repairing costs money, I don't need any free repairs)

I have tried this one time, and the costs are almost the same as new switches.

If you ever have a place in the EU where I could return them, I would be gladly willing to return them and pay for the repair.
Or maybe if there is another way of shipping them from a EU reseller to the USA?

The main problem now is the high shipping and customs costs.