Dlink Dir-615. Got over powered with a 12v instead of 5v Please help

I have a Dlink Dir-615 Wireless N Router and when I was cleaning up all the wires behind my pc I plugged the wrong plug into it. It was a 12 volte for my modem, and the Dlink is a 5v. But now it does not work when I plug it in nothing happens but I get a really bad smell. I opened it up but I could not see anything wrong, nothing blew. Please Help????

Picture of Dlink Dir-615. Got over powered with a 12v instead of 5v Please help
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Bad smell = blown capacitor. Look for a bulging or split top on an electrolytic cap, and cross your fingers.

It is, as everyone else says, likely to be an un-router.

Steve
orksecurity6 years ago
The bad smell is because a component has shorted out and is cooking itself. If you run the device with the cover open, you should be able to feel where the heat is coming from -- and possibly see the component smoking.

If the heat is coming from an IC... it's an ex-router. If it's coming from a capacitor or something of that sort, it *MAY* be repairable... but I wouldn't get my hopes up, if I were you.

You could try calling the manufacturer's customer service line and throwing yourself on the mercy of the court -- admit that you made a mistake and ask if there's any way you can get replacement unit at a reasonable price. If you're really lucky, they may be willing to sell you a refurb, as a courtesy to the customer.
frollard6 years ago
Others have the answers covered- - generally, 'once you let the smoke out it's garbage'.

Gently remove the board and look for burn marks on the bottom side -- they may be VERY tiny. I didn't see anything obviously broken in the photograph. It doesn't look to have very much power filtering on the unit, presumably because it's designed to be fed filtered power.
That last is why I'm skeptical about being able to rescue it. If it's getting regulated/filtered power from the wall wart, there's not much need to filter it further... and hence there isn't likely to be much protection.
which is funny because a 5v regulator is less than a dollar at quantity (rated for router-esque currents) ...and they usually have a 20-30 volt window before letting out the magic smoke. I don't see one on the motherboard, Yay modern capitalism, sacrificing quality for quantity.
A buck per unit is a lot of money when you sell a lot of units. Engineering is the art of designing something which is tuned _precisely_ to the requirements, rather than overkilling them.
That's the beauty of selling lots -- you get those discounts that make it possible to afford gadgets like this.
furthermore; I bet that's what the unpopulated area to the right of the power barrel connector is: I see an unpopulated protection diode, a few 8-pin smd pads, etc...

That COULD be a regulator immediately to the right of the barrel plug on a heat-sink, but it looks like its labeled SW1 (master reset)...often right next to the power plug.

The 2 inductors near the plug shouldn't have failed with just 12 volts, but who knows...
There is a power diode in there that for reverse polarity that SHOULD withstand 12v...

The solder on the surface mount dip8 to the right of the barcode looks 'brown' to me, might be flux, might be damage.
Re-design6 years ago
Well something blew. They don't always destroy pieces. It maybe burnt on the inside of a part or the bottom of the circuit board may have melted traces. That might be fixed.

But if the really bad smell is new, coming from the unit and not just your lack of sanitation then something's definitely wrong.
Corrolary of Murphy's law, in electronics
"the most expensive component will always fail to protect the fuse from damage"
Surprisingly though, (ime) in cases like this it's often a "cheap" component like a three pin regulator, diode, power resistor, or cap.
orksecurity6 years ago
Actually, one thing this suggests is that I should go through my own electronics with some paint or tape or tags and color-code which power cable goes with which device, to help ensure against making a similar mistake. Normally I'm careful about that, but there are times when I've got five cables coming to one place and the risk is increased; a bit of extra confirmation would be cheap insurance.
A very good idea. I did that a long time ago with my box-o-wallwarts, salvaged linear supplies, and odd gadgets
lemonie6 years ago

Bad-smell=cooked.
I'd go for this location myself.

L
t.bmp
seandogue6 years ago
My guess is that you blew the regulator or a component associated with the regulator. You may or may not be able to replace, depending on your experience and ability (and being able to find the replacement parts).