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Wire colors on psw202 power supply

What wire goes together from cord and fuse to bord

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Posted on Jan 02, 2017

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SOURCE: Polk Audio PSW202 subwoofer.

Fuse probably went bad because either the large filer capacitors at the edge of the PCB went bad and or the final output IC mounted on the heatsink(15 pin) fried. Check the capacitors and all the semiconductor components on the board for burn marks or corrosion. You have to remove the heat sink clamp from in front of the output IC to adequately visualize its condition. In fact you might have to remove the large aluminum heatsink attached to the chassis to get a good view of the IC. If it or the heat sink clamp show signs of thermal burns you need to replace it. The IC is a TS TDA7294 mono audio amp available at Mouser Electronics. Replace the 35V 4700mF caps with 50V 4700mF caps. You will only have enough space on the top of the PCB for one of the larger caps. I mounted the other on the circuit side of the board. Note the polarity of the original caps and respect it in their replacements. The fuse is a 5 X 20 medium speed slow blow 250V 2.0A glass fuse.

Posted on Dec 02, 2011

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Plug problem


On a three wire configuration, the ground and the negative are tied together at the center position, using the dryer ground strap. Following is a description of the difference between three and four wire. Hope it helps you.
These two pictures illustrate the power wiring on a the terminal of an electric dryer. The one on top is the old-style three-wire configuration. Most people have this type in their homes. New code changes, though, require that dryers now have a four-wire cord, shown on the bottom.
Besides the number of wires in each cord, there are two important things to notice. First, in the four-wire configuration, notice that the dryer's grounding strap is folded back on itself. The whole point of the four-wire cord is to separate the ground from the neutral. The green wire (the "new" extra wire in the four-wire cord) is attached to the dryer cabinet. In the three-wire configuration, the grounding strap is left intact and the neutral and ground are tied together.


Sure hope this helps you find a resolution to your delimma! Best wishes.


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1 Answer

Hooking a 4 wire power cord to a dryer that came with 3 prongs


*First ; before starting unplug unit or shut off breaker.

you should be able to match up color for color on your dryer, the fourth wire, green (ground) screws to the chassis, or cabinet. if your wires aren't coded as you say, it is red, white and black, left to right. see picture I've supplied.981ddeb.jpg
hope that helps

good luck

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1 Answer

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The main fuse is close to where the cord plugs into the machine. You can follow the wires, (black white and green) to an inline fuse or the main power board.

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The sub doesnt turn on no more...? why?


check the internal fuse. near the power cord there is a round modual that you can unscrew. once unscrewed you will see a fuse in there. make sure it has not blown. if that is not it make sure the sub is switched to on and not auto. on auto setting it will turn itself off if no signal is detected.

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1 Answer

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Yes you can replace the entire cord, or you can splice the cord back together. Get some crimp on wire connectors get a tube of heat shrink that will fit over the cord, cut back the insulation crimp, the wires back together (match color to color). heat the shrink or tape it up. Back in business.





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The power supply or amplifier has a shorted component.

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Replacing the electrical cord on a Roper Refrigerator


I may be able to assist...If you haven't done so already..UNPLUG The cord. Now, depending on where the wire was severed, will impact the degree of difficulty in reinstalling it.
I suggest that you position the fridge so that you can access the place where the cord actually goes into the fridge.
I assume that the cord passes thru a cable feedthru of some kind in the back so you may want to follow that into the fridge.
If the cord was severed outside the fridge you could simply join the 3 wires together as an inline connection ( making sure to keep the supply line, neutral and ground wires bonded to their corresponding ones ... meaning ground wire to ground wire, neutral to neutral and supply line to supply line... line may sometimes be referred to as the 'hot' feed.
If the cord was svered off internal to the fridge, try these steps..
You will probably need to remove an access panel on the back to see where the power cable is routed within the fridge. Once located, you will need to find where that cord was severed when it was pulled out. There should be 3 wires coming into the fridge from the power cord. I assume it came with a standard three prong plug that is compatible with a wall socket. You will have to identify which wire is which on the cord. It helps if you have a continuity meter or ohm meter for this. First, identify which of the 3 wires is bonded to the round terminal of the plug ( that would be your ground wire) That wire should be secured to the fridge frame with a bare screw of some sort. You may be able to trace the cord inside the fridge back to that point or you may be able to reattach the severed wire together using wire nuts to keep the wires joined together and electrically insulated from surrounding surfaces. Remember that it is critical to maintain the same point to point wire configuration as it came with. As a general rule of thumb, a bare copper wire or green insulated wire is typically the ground wire. Depending on the cord type, black insulated wire is normally the supply or HOT feed, and white is typically the neutral line. You may have different color insulation on your wires ( especially if it is a molded cable assembly ) so make sure you verify which wire comes from which terminal on the plug. ( round terminal on plug is ground, the longer of the two ( if it is a polarized plug would be your neutral and the shorter terminal would be the supply line. If unsure, get professional assistance. Hope this helps...

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2 Answers

Cord Connection


If your dryer cord is flat and gray, then simply attach the two outside wires from the cord to the left and right screws on the terminal block. Connect the center wire of the cord to the center screw of the terminal block. The only important wire is the center wire of the cord goes to the center screw of the terminal. The two outside wires don't matter.

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