Failure mode of mains network adapter?

Ticking sounds like an SMPS in shutdown, worth checking for a shorted diode on the secondary side at least.

Ah, that's probably beyond my limited skills. Not quite sure what *would* be within my capabilities having seen the inside. Most of the components are tiny surface mounted things that I can't do anything with.

On the plus side, I have a triangular screwdriver now. ;-)

Tim

Some pictures (if that's of any help to anyone).

Tim

If you have a DMM,check that melf* diode, I've seen a few of those fail short.

Has that unit been worked on? It looks like it's been hand soldered in places. Also, did the failure coincide with any of the storms recently, because if it did I wouldn't bother investigating it any further :) :)

I tend to agree. Round here with overhead 11kv and 33KV stuff, storms tend to pop the odd wall wart, router or mains kit now and again./ Its juts part of the cost of living as far as I am concerned

Doubt anyone has been inside it since it left the factory.

We haven't had any storms for a long time.

These thingies? D105 and D103?

Look way too teeny for my muckle fists to do much with alas. ;-)

Tim

Its the revenge of the short wave listener who has developed a secret weapon to put these interfering little buggers out of commission. Brian

Can't help directly, but over time I found myself the proud owner of some dead units.

I suspect the fact they cannot be used in protected circuits may be a factor in their apparent delicate nature.

Indeed. By definition they have to have a fairly high degree of connection at high frequencies, so excessive HF energy - as in Lightning or arcing - will feed straight into the modem.

And unless they put 50c worth of balun in there, chances are the electronics will die.

Care to elaborate?

The adapters I have are not able/supposed to be used in surge protected multiway adapters, or indeed multiway adapters of any stripe.

Oh, I see. Thank you.

In a previous life I used to work on office phone systems. When there was a storm you could guarantee work would come in the next morning. Philips "Sopho" systems were particularly vulnerable.

SWMBO went to work on Monday (she runs the computing dept at a large school). Thunderstorm Sunday, and ALL the servers were out, network ditto.

True, but IME bandwidth is reduced considerably.