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How do I replace my Power Supply?

Ok there is generally nothing "Special" about mains, wall power supplies, they simply provide DC volts, via a step down transformer, or switchmode technology, now there are ONLY three important things to know and they are, the Voltages, and Amperage, and Power Plug Polarity. You can often find this A: In the manual under Power Supply Specification, B:Or on the Actual power Supply itself, If one looks carefully, there is always on a UL listed power supply, the Output Voltage & Amperage, often Polarity is indicated too. If not, that can be gleaned usually, by looking besides the power input socket, on the actual unit, and, it usually, has a little drawing, with a dot and a 3/4 circle around it, with a + & - showing what goes where. In almost all occasions, though, it is Positive to the CENTER, & Negative to OUTER, (or earth). All you have to do, is get any other power supply that has the SAME Voltage and Current rating, IE: 12 Volts @ 2.5 Amps. Now any 12 Volt supply that gives, the same or MORE than 2.5 Amps will do. You just need to ensure that the Plug is right, often the plugs are different, that too, can be overcome, simply, by cutting off the OLD, plug, and cutting off the NEW plug, and joining, Old, to New end on PSU. Again, usually, Positive is the Center, and the Negative is the Outer. Right go get that supply. Ebay or Radio Shack, are good places to start. Also any other "Laptop" power Supply that has same specs as described, will also work. As a matter of point, switchmode is generally "Cleaner" power than a transformer one.. but it is NOT critical. All laptop, and some other things, power supplies, have "Chips" in them, to "Help" with charging? thats what "they say" Sometimes, you cannot replace this type of power supply, with anything other than the exact replacement, BUT it is still worth a "try" it will/should not ruin anything all that may be compromised may be the "Charging" of the/any battery. That is why batteries can "Fail" and cannot be recharged, NOT due to the batteries actually being "Faulty" oh no, it is simply that the "Chip" has failed and that often, stops the battery from being "Seen" and/or recharged.

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I HAVE LG WASHING MACHINE TRANSFORMER HAS BEEN BURNT WHICH IS LOCATED IN PC BOARD SO I WANT KNOW WHAT THE IS RATING VOLTAGE OF SECONDARY SIDE?


This is a step down transformer for the DC supply to the board and processor. You can check on the DC side and if the main capacitor is 16 volt then it can be a 9 volt tapping or if this is 25 volt it can be a 12 volt one. The important fact is to have the size that fits into the slot which can confirm the mAmps required for the transformer.

Feb 07, 2013 | Washing Machines

1 Answer

How do i build a 12vac 2a adapter step by step.


Just get a transformer with a 12 volt 25 VoltAmp rating on the secondary and a primary suitable to your mains power in your part of the world. 120 VAC 60Hz for continental North America. for example.

Put a power cord on the primary with a suitable switch to shut it off, and the output of the transformer will provide you with the 12 Volts AC at 2 Amps output. Attatch the suitable adapter to the end of the secondary wires, and you are all set. AC does not have a polarity like DC.

Dec 22, 2011 | Computers & Internet

2 Answers

hello i have a Sony Vaio PCW-W2 that i brought to canada from uk. how do i switch voltage to 110?


u can find voltage converter connectors......try using that....u can ask for travel adapters....hope u find them

Mar 08, 2010 | Sony Computers & Internet

1 Answer

2Wire 1000HG power supply went bad. Need to replace but having trouble finding one. Would like to purchase in a store


Ok there is generally nothing "Special" about mains, wall power supplies, they simply provide DC volts, via a step down transformer, or switchmode technology, now there are ONLY three important things to know and they are, the Voltages, and Amperage, and Power Plug Polarity. You can often find this A: In the manual under Power Supply Specification, B:Or on the Actual power Supply itself, If one looks carefully, there is always on a UL listed power supply, the Output Voltage & Amperage, often Polarity is indicated too. If not, that can be gleaned usually, by looking besides the power input socket, on the actual unit, and, it usually, has a little drawing, with a dot and a 3/4 circle around it, with a + & - showing what goes where. In almost all occasions, though, it is Positive to the CENTER, & Negative to OUTER, (or earth). All you have to do, is get any other power supply that has the SAME Voltage and Current rating, IE: 12 Volts @ 2.5 Amps. Now any 12 Volt supply that gives, the same or MORE than 2.5 Amps will do. You just need to ensure that the Plug is right, often the plugs are different, that too, can be overcome, simply, by cutting off the OLD, plug, and cutting off the NEW plug, and joining, Old, to New end on PSU. Again, usually, Positive is the Center, and the Negative is the Outer. Right go get that supply. eBay or Radio Shack, are good places to start. Also any other "Laptop" power Supply that has same specs as described, will also work. As a matter of point, switchmode is generally "Cleaner" power than a transformer one.. but it is NOT critical.

Mar 02, 2010 | 2wire HomePortal 1000HW DSL Modem and...

2 Answers

no power to my router


Check the wall outlet for power, using a lamp or such. If you can get a multi-meter, set the meter to Volts-DC between 12 and 20. Plug the power supply into the wall outlet and test the other end for voltage. The power supply should tell you its output so the reading should be more than a couple of volts. If it is less or ZERO the power supply is dead. If it has power, then open the router and check for a fuse. If the fuse is dead, replace. If there is no fuse or the fuse is OK then the router may be dead. Best of luck.

May 29, 2009 | Linksys Wireless-G Broadband Router

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