This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been a cylinder about 1/4" in diameter and 1/2" tall and contains a bunch of soft brown fuzzy material which can be seen in this photo:
[image|942482]
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Here's a picture of the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base.
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[image|948671] [image|948670]
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Here's a picture of the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base.
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[image|948671]
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[image|948670]
The label seems to say "-40C + 105 C" and "SR LOW ESR"
What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
I desoldered the blown component and removed it from the top of the board but there are no traces there.
[image|947430]
The underside of the board looks like this:
[image|947391]
The speckles are remained bits of solder after my amateurish desoldering job. ;-)
Here's my interpretation of what the various soldered connections are (you'll have to click on the image to zoom in to see the outlines and text I added):
[image|947390]
So it looks like the blown component was straddling the two sides of the power. Would it have absorbed the over-voltage and protected the rest of the circuits and components? I'm not seeing anything that looks damaged though I suppose it would be hard to see if the IC under the black disk had gotten fried. Is there any way to test it?
Strangely, these JPG's are both rotated counter-clockwise 90 degrees on my computer.
This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been a cylinder about 1/4" in diameter and 1/2" tall and contains a bunch of soft brown fuzzy material which can be seen in this photo:
[image|942482]
-
Ihave misplaced the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base. What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
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Here's a picture of the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base.
+
[image|948671] [image|948670]
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=== Update (11/10/2016) ===
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The label seems to say "-40C + 105 C" and "SR LOW ESR"
-
I desoldered the blown component and removed it from the top of the board but there are no traces there.
+
What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
+
+
I desoldered the blown component and removed it from the top of the board but there are no traces there.
+
[image|947430]
The underside of the board looks like this:
+
[image|947391]
+
The speckles are remained bits of solder after my amateurish desoldering job. ;-)
Here's my interpretation of what the various soldered connections are (you'll have to click on the image to zoom in to see the outlines and text I added):
+
[image|947390]
-
So it looks like the blown capacitor was straddling the two sides of the power. Would it have absorbed the over-voltage and protected the rest of the circuits and components? I'm not seeing anything that looks damaged though I suppose it would be hard to see if the IC under the black disk had gotten fried. Is there any way to test it?
+
So it looks like the blown component was straddling the two sides of the power. Would it have absorbed the over-voltage and protected the rest of the circuits and components? I'm not seeing anything that looks damaged though I suppose it would be hard to see if the IC under the black disk had gotten fried. Is there any way to test it?
Strangely, these JPG's are both rotated counter-clockwise 90 degrees on my computer.
This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been a cylinder about 1/4" in diameter and 1/2" tall and contains a bunch of soft brown fuzzy material which can be seen in this photo:
[image|942482]
-
Ihave misplaced the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base. What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
+
Ihave misplaced the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base. What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
+
+
=== Update (11/10/2016) ===
+
+
I desoldered the blown component and removed it from the top of the board but there are no traces there.
+
[image|947430]
+
+
The underside of the board looks like this:
+
[image|947391]
+
The speckles are remained bits of solder after my amateurish desoldering job. ;-)
+
+
Here's my interpretation of what the various soldered connections are (you'll have to click on the image to zoom in to see the outlines and text I added):
+
[image|947390]
+
+
So it looks like the blown capacitor was straddling the two sides of the power. Would it have absorbed the over-voltage and protected the rest of the circuits and components? I'm not seeing anything that looks damaged though I suppose it would be hard to see if the IC under the black disk had gotten fried. Is there any way to test it?
+
+
Strangely, these JPG's are both rotated counter-clockwise 90 degrees on my computer.
This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been about 1/4" in diameter and 1/2" tall and contains a bunch of soft fuzzy material.
+
This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been a cylinder about 1/4" in diameter and 1/2" tall and contains a bunch of soft brown fuzzy material which can be seen in this photo:
-
What would this have been? And where could I get something to replace it?
+
[image|942482]
-
(I would post a photo but I cannot see a way to do that here.)
+
Ihave misplaced the exploded shell that I pulled off the two aluminum tabs sticking up from the black circular base. What would this have been? A capacitor? A fuse? And where could I get something to replace it? Or could I just solder the two tabs together and see if it still works (but without fuse protection)?
This charger runs on 3 volts DC. I accidentally plugged in a 12vdc power supply that had the same plug shape. There was a puff of smoke and a burning smell. So I unplugged it quickly. Later, I took the charger apart and the only damage I can see is a blown component on the circuit board next to the line-in. It appears to have been about 1/4" in diameter and 1/2" tall and contains a bunch of soft fuzzy material.
What would this have been? And where could I get something to replace it?
(I would post a photo but I cannot see a way to do that here.)