Question about Panasonic CT-36D32 36" TV

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Circuit board repair

Does a qualified tv technician have a way of checking an individual circuit board for a problem without checking every single circuit on the panel, much like an engine diagnostic machine?

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Yes

Posted on Nov 16, 2007

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My sony bravia KDL22BXOD has sound but no picture. What is the fault and how do I fix it?


If you are a qualified TV-repair technician, disassemble the TV, and check the circuit-board. You may need to replace some capacitors, or replace the entire circuit-board. If you aren't qualified, take it to the nearest Sony authorized repair centre, for them to trouble-shoot and repair it.

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There is no power to tv after being transported but i dont no where the internal fuse would be in tv. to check it please help


Actually this is not a user reparable work. If you are aware in electronics, and know how a Plasma TV works, you can repair this set. Otherwise, it will be better to get it repaired by any experienced service technician.
Normally fuse will come at different stages in the plasma TV circuits. If you want to now more about its circuit boards, and other functions, check this. There are details about the lay outs. Never attempt to repair it, if you're not qualified to do the work.

Jan 03, 2013 | Hitachi 32PD5200 32 in. HD-Ready Plasma...

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No picture or sound on emrson lc320em2f tv


This may need attention by a qualified service technician.

Jul 27, 2012 | Emerson Televison & Video

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The circuit board on my 9 year old neptune washer went up in smoke. Do I replace the circuit board or by a new washer? Thank you!


Check the price of a new circuit board against the price of a new machine. Take into consideration that installing a new circuit board yourself might see the new one go the way of its predecessor due to some other fault. Have a qualified technician give you a quote on the repair and again compare prices.

Jan 25, 2011 | Maytag Neptune Washer

1 Answer

Tv keeps turning off


Scenario 1: The TV turns on then shuts right off
  • In this case, the power supply unit is being loaded down by any of the boards it supplies. A short circuit is being detected in any of these boards. These boards are connected to the indicated connectors on the power supply unit shown below.96540c1.jpg
  • The resistance, both in reverse polarity, of the cables from the boards specially the ones with indicated voltages need to be checked. Short circuit is present when resistance on both instances is zero.
  • The board with the indication of a short circuit must be replaced.
Scenario 2: The TV turns on then shuts off after some time
  • A heat sink overheats. Make sure the TV is placed at least 4 inches away from the walls. This will allow proper air circulation. You can also provide a fan. Have it checked by a qualified technician to prevent further damage.
  • The power supply is faulty. It is usually caused by leaky or bad capacitors like the ones shown below.

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  • Replace the capacitors with the same specifications.
Warning: Service of a qualified technician is necessary to carry out the troubleshooting and repair to avoid personal injury and further damage to the unit.

Nov 29, 2009 | LG 42LC2D 42 in. LCD HDTV

1 Answer

My SD-532 HD5 Pioneer TV wont turn on so I took it apart and noticed a fuse was blown so i replaced it and then it blew again. Any suggestions why?


Hello hnelbach, From what I can tell by your description, one of the subsystems in your TV as developed a short circuit (hence the fuse blowing). I would suggest that you get a qualified TV Technician to repair this TV since there are no user serviceable components in this TV. This TV has very dangerous voltages which can kill under certain circumstances. I would have the technician look at the deflection board. This board contains the Convergence AMP, and Horizontal Circuitry. These circuits are the usual culprits in this type of problem. I hope this helps, Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Jun 14, 2009 | Pioneer SD-533HD5 53" Rear Projection HDTV

2 Answers

Picture dies after 30 min


That is the power supply defective or the main board is overheating.

The technician will start the Set with cover open and point a fan as big as possible toward the main board, if the TV stays on longer or does not turn off at all then it was an overheating problem on main board. Replace cooling system, or even better add an additional cooling fan to the heath sink.

If this was not overheating test inverter and power board.

Note this model suffers from overheating related problems, but as you pointed out, a faulty power board, or a faulty inverter board can cause the same kind of shutdown.


Apr 16, 2009 | Samsung TXR3079 TV

1 Answer

Samsung TV Problems


Mike:

What problem did you have with your Samsung TV? If it has anything to do with your set turning off after 30 minutes or so, then read on.
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I had the same problem with my Samsung TV Model: TXR3079WHX. I troubleshot my problem with a can of component cooler from Radio Shack and found my problem to be a defective voltage regulator, identified as "QR015" on the main circuit board (the same board that contains the high voltage section).

Caution:

Before I proceed any further I need to strongly warn you. Do not attempt to remove the back cover, troubleshoot, repair or perform the actions that I have done, if you are not a "qualified service technician". Removing the back cover exposes you (and anyone else) to harmful and deadly electric shock, even though the TV may be unplugged from the wall outlet and turned off. You (or anyone else) can be seriously injured or even killed. If you are not qualified, play it safe by allowing others who are qualified repair this for you.

The defective part (overheats and shuts your TV off) is voltage regulator manufactured by Fairchild. The part number is KA75450ZTA. This part is available from Mouser Electronics for less than 20 cents plus shipping. In order to replace this part a qualified technician will need to remove certain cables and unscrew the main board to allow access to desolder and solder the new component.

Hope this helps.

Oct 27, 2008 | Samsung TXR3079 TV

1 Answer

Need help


A power supply is a very complex circuit that changes the voltage that comes from an outlet to voltages the tv can use and is a circuit that need to be repaired because in Tv's is only a section of a circuit board and the rest of the board has other functions. Computers use a single module that you can replace as a whole but not tv's.Be safe an call a qualified technician because there is danger involved.Get an estimate.

Sep 17, 2006 | Pioneer SD-P5795W 57" Rear Projection...

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