identify a blown SMPS transformer

[jellycream4me]

Looks close to a Tamura 3FD series 2.4 Watt standby type. Why are the windings that way?

i was messing around with it to se if the winding broken anyway near the solder pin.

 

[jellycream4me]

It looks like an SMPS standby transformer.

It's not the main one by any means (which is a ferrite core high frequency one), but one used to keep SMPS or some kind of Logic board "half awake" waiting for a starting signal, anything from a pushbutton to an IR module to detecting Audio signal at input to some kind of Microprocessor "command".

Low power because such "logic" board needs very low.
I remember seeing baskets of generic transformers such as this one at Electronics shops, originally meant for TV sets.

When you turn TV OFF by means of infrared remote control this keeps the IR receiver "awake".

Meaning: you can probably get a generic one.
Typical failure (I repaired a couple TVs with such a problem) is that hair thin primary wire breaks open either by corrosion (humid environment) or bumps (moving TV in a car trunk) or similar.
Repair means buying a new transformer but they are dirt cheap (5 bucks or so, less if surplus)

No need to "upgrade" it, all I saw were open as described, none was "burnt"

In fact, thin primary wire works as a low current fuse, so they are typically not fused, go figure.

thanks for your input it makes alot of sense that it only keep the logic board awake, this sub has a auto standby where it listen for any audio input and might be it.

 

[jellycream4me]

Goes without saying something caused that.

yeah true but i think JMFAHEY where somewhat not far from truth since it died on low volume and with a brrr sound, the led wont light up properly either.

 

[jellycream4me]

thanks everyone for the help, ive realized that finding a tranformer is quite confusing at first, but with your all help i might even solve it the next time i blow a transformer.

 

[wrenchone]

That obviously is a line frequency transformer intended to provide aux power for the SMPS, since it's specified for 230VAC 50Hz at the input. You could probably replace it with a 10-20VA toroidal transformer from someone like Antek.