What is the polarity of this cable? Center positive?
1815732
I'm not an electrician, so I'm afraid this question is too technical for me. However, if it's of any help, the USB end plugs into my laptop and the barrel jack plugs into the chill pad/fan.
1865105
If what you mean is the part that plugs into the device (not the wall) then yes the center part on the inside is positive and the outer shell is negative. I BELIEVE, NOT 110% SURE THOUGH.
652719
Not sure about that as mine is negative ground. That said, it should be ground polarity insensitive by reversing the connections.
1379032
Amazon carries for under sdollars make sure that you get the correct polarity--- Positive center negative outside!!!!
688281
Since we're dealing with diodes I'd say polarity needs to observed. The good thing is you no harm if it's not right. It just won't light.
365118
Dear Piero, Using the key provided turn the orange disc on the left to +. in the middle of each disc is a tiny arrow shaped opening to put the key in. On the right turn the arrow to the voltage you need. On the back of the box it states " If the product does not function, change the polarity. That is all you need to do.
511297
Mine works fine, but remember you have to separately plug it into the appropriate pins on your motherboard, if you did that and it still does not light, reverse the leads and try that. You would think that polarity does not matter but we've found out in this case it does. Also, don't pay the current price showing here of $84, I bought mine on sale from Amazon back in January for $49 including a $10 rebate, but for instance right now at New Egg this same case is on sale for $59 with rebate
1664301
Usually that means pin one or positive. I just follow the color of the cables instead, but that's just me. I hope this helps.
911281
12 volts, 2 amps, center positive. Here is a pic of it to make sure. https://www.dropbox.com/sc/6ggji2971ucfld2/AADIDwIe1vfJ3bHmZmNNcL_la
939307
The photo is wrong. I think they just used a generic photo and didn't think to blur out the polarity as well as the output voltage and current. The polarity of the adapter is actually "negative polarity". The output voltage and current is listed as 8V - 10V; 1A - 2A. This is a pretty big range, and I think it is causing the adapter to work for some people and not work for others. Mine works with my PT-1090.
1618218
Yes polarity matters. I don't know which is + or - however. I tested it one way, didn't work, reversed the polarity, worked.
1469172
Typically the white or dash-dot wire is positive and the unmarked black one is negative. As to the plug itself, the center pin is positive and the shield is negative. Of course, it is always best to test with a volt meter but this is standard electrical wire code.
789075
I am guessing "NO" since I originally had the wiring polarity hooked up backwards and didn't have a reading.
1037573
I agree with T. Thomas, sounds like reversed polarity - it's easy to do as the documentation is not very clear on the wiring.
721635
hi, i did the same thing when a cable that was plugged at an angle... any luck? thanks
2219631
Make sure the wiring polarity is correct... I had mine reversed by accident at first, and it didn't work (plus the power wire almost immediately heated up).
958564
I can't answer, I threw them away after reading from a few reviewers that the polarity is switched (neutral and common wires are backwards.) I suggest you seek out an alternate item just to be safe.