Electronics 2000

Hi,

I am having problems with a small pcb that drives the angel eyes on my bmw. It's intermittent so decided to open it up for a look. I noticed that There was a capacitor damaged, a loose wire and this component wasn't in great condition. I have identified the capacitor but not so sure what this is and was looking for some advice to its identity.





This is where it is located on the pcb if that helps any better.





Any help is much appreciated on this as I'm slightly stumped.

Thanks
Stuart

That's a small surface mount inductor (coil), with a value of 47 uH. They are often used in small switching power supplies.

Thanks very much for that info, are these easily de soldered to install a new item. Just to confirm it does say 470 on it so I guess that's the 47uH?

I also see that there are different amp ratings. Is there anyway to identify what this item is?

Thanks again
Stuart

If you get a replacement of identical size you'll probably be OK as far as ratings are concerned.
The value designator 470 is decoded as 2 significant digits (47) and number of zeroes to follow (0, i.e. none) and is the value in microHenry. Hence 47uH.

To replace it, clean off the old solder from the pads with some solder wick, then apply a tiny quantity of fresh solder on the pads (not so much that it will make a bulge) then position the new component on the pads with a pair of tweezers, hold steady and heat the terminals with a small soldering iron with a very fine point until the solder flows.

If you aren't really practical with soldering surface mount components, better leave this to someone who is.

Scrap circuit boards like old computer cards are good for practicing. But you need a good soldering iron, with a fine tip and preferably temperature controlled.

I dont understand about top two photo what is this ?

It is an inductor with it's coil unwound.