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Is the polarity important in wiring a new TV cord

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Yes. Especially so on a 3 wire cord.

Green to Green
Black to brass colored screw
White to silver colored screw


Posted on Aug 02, 2008

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Thomson tv projector 61DSZ644 schematic diagram power supply board

Thompson 61DSZ644...Hello,I have a big problem with this tv.When i start it,the sound is good,but the image is very ,very dark.I buy a new lamp,i change it,but i must change the two wires from the lamp because the new lamp have it change.It came from china and is the same lamp,with the same specifications,just the polarity wires is i change it and when i start the tv,i can see the image better but not normaly,the image is like in the white fog,even if the lamp is new...and after 20 seconds,the ventilator from lamp is stop and TV enter in stand by.Can anyone help me about this problem?

Mar 21, 2013 | Thomson 61DSZ644 Rear Projection Lamp...

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Power cord was pulled out and looking to replace the cord

Two types of power cords--ones that are soldered into a board inside the set and ones that plug onto a socket inside.

Almost any standard POLARIZED cord will work for the soldered in ones---Polarized cords at the plug have two lugs--one larger than the other---

The large pin goes to the neutral side of the electrical outlet--if replacing a soldered in cord you MUST get them the same.

The larger lug on the cord will have a white stripe on that side or a rough surface.

Neutral to neutral and hot to hot---the hot side in the set goes to the fuse.

This has been around for decades--it prevents the cord from being plugged in backwards (Polarity) and if installed backwards the set will work but you will have 120 volts potential voltage on all external metal fittings like the CABLE fitting---sparks will happen when you try to put the coax to the set and it will feed this back to all sets via the cable in your home.

Get it right the first time----a cord that plugs onto pins will have this also but the plug on the cord if original (Toshiba in this case) will not permit this reverse polarity because of the shape of the plug itself at the end of the cord.

Dec 08, 2012 | Toshiba TheaterWide 52HM84 52" Rear...

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My son cut the power cord to the tv, how do I replace the cord? can I replace the whole cord from the back of the TV?

That cord in this model is usually a plug in--inside the set it either goes to a plug or is soldered in place.

Depending on how short it was cut it can be repaired--notice that here the cord has two sides---one will be smooth and the other has a white stripe or is rough----if spliced the splices must match the ones on what is left of the cord-----cord is polarized and should not be plugged in unless matched to set.

A fairly easy repair if done right--most people or any outside repair person can easily do this.

May 04, 2012 | Philips 60PP9202 60" Rear Projection...

1 Answer

Cut power cord for Sony Bravia kdf-50e3000

I am not sure what you are asking. If the cord is to be replaced, in some cases a computer cord is compatible. You may remove the female end and insert a computer power cord. Many of these flat screen TVs do have a removable power cord. In the case this cord is attached internally, you will need to find a TV shop to replace it. If this is the case, they will be sure to install with correct polarity. Thanks for asking and show all hands of support!

Aug 15, 2011 | Sony Televison & Video

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The situation: My old cable box was constantly

You have reversed polarity in your outlet and probably not grounded. If you have any voltage setting on the ground of the hdmi then its your home electrical at fault. If you take the extension cord and reverse the plug from the tv to the ext cord you will probably not find any voltage on the hdmi.I know the neutral is wider but you can make it fit just to test. We ran into this years ago when cable boxes came out with older homes.

Dec 19, 2010 | Toshiba 57HC85 57" Television

1 Answer

Can a ps3 cause problems for your tv

If the convergence is normal with VHF antenna or video input, convergence circuit is OK.

If convergence problem becomes visible when you switch to HD input, the convergence needs adjustment for that size or picture mode. Sony TV has different memory data for different size or format pictures.

If adjustment in the customer convergence adjust screen is not satisfactory, someone has to enter the service mode and adjust. Not recommended for rookies.

The game box or any other input will not damage or stress the TV if the game box is working normally.

If convergence is not correct in all size modes and can not be adjusted you need a repair to the convergence circuits.

Occasionally the convergence ICs are on the verge of failure from accumulated AC power bumps or lightning pulses on the AC line.

A small spark from poor grounding or static electricity can occur when connecting an input and the TV is powered on. Semiconductors (transistors, diodes and ICs) that have accumulated junction damage may fail when the effect of the arc is applied to the junction of the semiconductor.

The failures are often blamed on the Game or other external device. The TV would probably have failed in a short period of time with normal operation.

Turn off power to TVs and external devices when connecting or disconnecting video, audio or antennas. It is also important to use power sockets correctly. All electronic equipment has polarized plugs or 3 prong plugs to make sure the grounding is correct. Using multiple extension cords that are not grounded correctly or incorrect house wiring causes ground loops and unexpected problems. Best is a power bar with 3 prong plug in the wall.


Jul 20, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

The cord to the tv is broken

You can find an electrician who can repair this. He will be sure to wire a new cord in, using correct polarity, which is a must.

Jan 07, 2010 | Mitsubishi WD-52525 52" Rear Projection...

2 Answers

Hello i have a zenith z46z83d rear projection tv. the power cord clip on end is damaged and the piece that was connected to the board is broken off i can get a connection sometimes by wiggling it around...

There is a easy way to do this if you can solder--notice the power cord has two sides--one side of the wire will be smooth and the other have ridges---

This is a POLARIZED power cord--

whichever side is damaged you can remove the tab--unsolder it and solder both wires to the same place where the tabs were--

The tabs are just there for ease of production--you will have to gain access to the board to do this but DO NOT KEEP WIGGLING THE CORD OR YOU WILL GET INJURED OR DAMAGE THE SET---

Only TWO wires to deal with here---10 minute job once you get access--unplug set before you do this ---you do not need a special tool for this as almost any soldering iron can be used--OBSERVE THE CORD AS YOU DO NOT WANT TO REVERSE THE WIRES----SHOCK HAZARD WILL EXIST.

POLARIZED CORDS CAME ABOUT TO PROTECT PEOPLE FROM GETTING SHOCKED--lamps, and almost every appliance have them---this happened over 50 years ago after a lot of people got injured and some even killed.

Let me know if you need advice or help--I am here to help people--

If this helps you, rate this solution as I do this here for free.


Nov 08, 2009 | Televison & Video

1 Answer

I have a big green and blue circle on my screen

You are facing this problem due to a burnt polarizer filter just past the blue filter for the blue chip.
This TV has a three chip design with red, blue and green chips.

Get new polarizer for your tv from panasonic .

Mar 02, 2009 | Panasonic PT-50LC14 50" Rear Projection...

1 Answer

Need new power cord

Recommend against soldering the damaged ends together - it's ugly, will never be especially safe, and risks being unreliable too. Have a look at the TV end of the cable. Does it go straight into the TV, or is there a plug that goes into the TV. If there's a plug, just pull it out, take it along to shop that sells TVs and they'll sell you a new one off the shelf. If the cable goes straight into the TV, the solution is just a tiny bit more involved. First, look at the mains plug to check whether it is moulded on, or rewirable. If moulded on, you will need both a new plug, and some flex. If rewireable, you'll only need the flex. Either way, take the cut-off end to Home Depot or somewhere similar and buy something the same shape and size (thickness of the wires is the important thing here). To fit, carefully take the back off the TV and look at how the existing cord was connected and secured before removing it and putting the new one on in exactly the same way. Don't forget to push the wire through the hole in the case (if there is one) before connecting it up. Once the flex is fitted to the TV, fit the plug to the other end. Safety/reliability tip 1 - while the back is off, try not to touch any electrical or electronic components inside the TV other than the power terminals you're supposed to be working on. Saety tip 2 - when renewing a power cord, wire the new cord to the appliance before fitting the plug to the other end of the cord - amazing how many people have helpfully been plugged into the mains in the middle of a job. A.

May 01, 2007 | Mitsubishi VS-60603 60" Rear Projection...

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