I’m trying to identify this component from the power supply side of a friends phone exchange (Opera 206). It went bang and let out all its magic smoke when he plugged it in. The photo is from my Opera 206, as his is covered in soot.
It’s connected accross the Live and Neutral on the primary side of the mains transformer. Our initial thoughts were that it was some form of smoothing capacitor, but it’s labeled “VR1″ on the circuit board (which isn’t really a common way to label capacitors) so we’re not sure.
The exchange powers up just fine without it, but as people designing electronics aren’t usually in the habit of including extra components just for fun – we’d quite like to replace it if possible.
The markings say “2754″ and “00|04″ which are a little confusing! So, if you know what this is, and what the markings mean, please let me know in the comments so we can replace it!
Edit: It’s not actually a competition, so I’ve changed the title – the permalink has already been spread around a bit though so it’s staying as-is