We are finding approx 20% of the power supplies will fail.
We probably have about 140 deployed when I do a serial search of our cnmaestro for WFT though it could be more. (the R200 ones which use a brick seem to be working much better)
It seems we are going to about 5 customer sites a week to sort this out.
I have noticed the techs will go out and confirm the router is not powered on, then they swap over the power supply and it starts working again. Then when they bring the "bad" PSU into the workshop, i find it works okay with only occasional ones that dont work at all. I believe the totally dead ones are at 5 of the 140 deployed.
Approx 20% seem to fail out of the box, or fail within a couple of weeks and require a tech truck roll. The techs just swap the power supply and bring in the bad one - half the time they work fine when they bring them in if i am careful in powering them up, but 5 are definitley not working which I have returned and exchanged with our distributor.
So the only thing I can think of is the mains supply voltage.
I went and sorted out one today - customer said the router wouldnt power up.
- Plugged in the power supply into the wall outlet while switched on, then plugged into the router
didnt work
So then
- Switched off at the wall outlet, unplugged barrel from router. Switched on, tested voltage 12v, then plugged into router and it did work
I tested the mains supply voltage which was 242.5V
The new zealand legal standard of supply is 230 +/- 6% so the power company is allowed to supply voltage up to 243.8V
However the power supply that comes with the cambium R190V is rated for only 100-240V
I am not sure if this is a rounded number on the label or if it actually is only designed for a 240V limit.
I think the same standard may apply in australia too.