WS-12-DC 24 VOLT POE FAILURE

[oznet]

I have 2 brand new ws-12-dc switches the have no 24 v poe available.
Says no fan dedected
Shows -.07 volts on 24 volt board.
Exactly 50.1v input voltage supplied by 10 amp ICT power Supply.


Neither of these switches would work out of the box. In order to get my site up I am using External POE injectors.
I have several of these deployed and have worked perfectly. Any Ideas?

[lligetfa]

You posted to the wrong (Customer AP) forum. I moved this thread to the WISP Switch forum for you.

[dan@e-co-op.com]

I'm seeing the same failure on one of our WS-12-DC's, but can't find the resolution here. What is the fix?

[viama]

Any solution?

[thomas]

had two of these a while ago that had a filter cap lodged under one of the mux chips during manufacturing, both boards with the exact same defect. it was for the current sensing, but the 3v3, 24v and 48v vsensing sensing is done right beside it. if the topside resistor of the 24v voltage divider was tombstoned, for example, I believe it would read 0V on the 24rail. not sure if the switch itself would refuse to enable 24v when in this state, but hey, it's a theory.

doesn't account for missing fan though