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There are universal power supply units available that come with a variety of interchangeable ends and switchable polarity, current and voltages. However, if one of these will fit your particular needs I have no idea or indeed if they are available in your country. Try eBay or Amazon. I hope that is of some help.
there is no polarity in ac current as ac means alternating current and that means alternating between positive to negative back to positive back to negative and so on
only dc ( direct current ) and the center pin of the plug is designated as the positive pole has polarity, the outer case being the negative
OR Are you asking the voltage of the ac adapter and the voltage of the dc output side of the adapter
I have one of these too. Here is the information, in case you don't still have the adapter. Ktec Model KA12D090050034U Input 120V AC 60Hz 95mA Output 9V DC 500 mA
The inner part of the plug is the positive side.
Try googling the model number above. I did and found several sources. If you still have the adapter and only the power supply itself is bad (but the plug is still good), you may be able to splice on another 9 volt DC adapter, as long as the power output is 500 mA or greater. If you go this route, make sure to check the polarity before plugging it into the radio.
it doesn't matter if its + or - , make sure the pc runs on 19 volts and that the AC adapter does also, look underneath the laptop to find out if it does run on 19 volts but make sure the power jack fits the socket o the laptop before plugging it in to the mains
I am showing the AC adpater specifications as:
Input Voltage Range: AC 100V - 240V Output Voltage: DC 19.5V Output Current: 4.62A Power: 90 Watt
Does your adapter meet those specifications?
Although I am a proponent of Targus products, possibly purchasing an OEM adapter may solve the problem. We have successfully purchased ones available from reputible vendors on eBay at a discount.
Have you checked to always show the battery status in the system tray so that you can verify when the AC adapter is actually charging versus an intermittent connection or malfunctioning power socket?
Actually i haven't fixed the problem as yet but i did find some info that would help me to fix problem. I went to google and entered keyword,,, Electronic parts,,there came up a page,,and i went to several manuf sites till i found a replacement transformer,,then i disassembled the power supply and am now waiting for a replacement transformer.
Have a look an the underside or back of the unit and see if it has a label on it with the voltage and current requirements.
May be something like 12v - 1Amp or similar like 15v - 800mA, 12v - 1200mA etc. These will more than likely be DC as the power supply has the electronics to convert the mains AC to low voltage/current DC. If you can find them it will be easy to shop around for a power supply to match. It may also show the polarity of the plug that plugs in to the router from the power supply. i.e. outer = Negative (-), center hole =Positive (+).