Question about RCA F36676ET 36" TV

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Mother board Hi Jerry; is it possible for me to get a new mother-board that is complete with all its parts so I can just connect the wires and it is ready? please let me know and if so at what cost. Thanks J.

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I answered many of these questions over the last number of days. Which TV or device was this for? What was the fault that it had?

If you are talking about replaceing the complete mother board for a TV set, if the set is more than a few years old, I don't think it would be available. Most likely the cost would be about the same as buying a new TV set. Another thing to consider, if you were to replace a complete TV mother board, you would have to perform the complete factory set-up to match the display device (CRT for example), and match the other boards driving it.

Jerry G.

Posted on Apr 26, 2008

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Losing my blue color

In the CRT sets, not only Sony, there are many types of failures that can cause a loss of a colour channel.

  • damaged or warn parts on the CRT circuit board that are associated to the related colour channel(s).
  • The CRT itself may be failing.
  • Defective interface socket on the CRT circuit board, or a cold solder connection under the connector or on the the CRT board, or along the path of the related video colour channel.
  • Intermittant loss or complete loss of the bias voltage supply for the CRT that drives the colour channel in question due to any failing parts, or some cold solder connections.
  • The CRT itself is going defective and thus failinig.
  • Cold solder connection(s) on the circuit board.
To find this type of fault it would take an experienced technician using the appropiate test instruments to make the necessary tests.

Considering the cost for the time and the necessary parts (if obtainable for an old set), you may find the set too exensive to have serviced.

Jerry G.

Sep 15, 2009 | Sony Televison & Video

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Power switch turns on and off

that would work if you want a costly bill. Try this before dishing out cash, the problem is the switch that tells the board to turn on and of is bad and a cheep quick fix is to open the back of your TV(#15) (unplugged of course)and remove the hex(#10) screws to the mother board look under TV tube and you will see the switch board,remove both hex screws(#10) and pull the switch board out,follow black cord to mother board and pull cord out of its port. know find the word KEY also #2 on the switch board, should be the red wire. cut this wire and be sure there isn't any bare wire showing at your cut, a piece of black tape will help this. reinstall the switch board and mother board and back of TV . you should be all good to go

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1 Answer

TV comes on when it wants to

If the TV "goes out" meaning that you lose tuning (picture gets very snowy, disappears totally, etc.) but the power stays on and is otherwise normal, the trouble is often because of bad connections inside the tuner.

It is possible to remove the tuner from the circuit board, open it up and resolder the connections that typically go bad. (Usually they are solder joints connecting the ground traces along the edges of the tuner circuit board to the metal box it mounts in, and some other ground points on the board. Often they are visibly cracked.)

To this requires electronic soldering skills and the tools to make the repair. It is possible to do additional damage to parts because of small connections, fragile parts and so on), so this may not be something you want to try as a first project. But if you can do the soldering and are patient, it is possible.

On the other hand, if "going out" means the set suts off completely, there are too many things that might cause this to offer any suggestions for things you might try on your own.

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1 Answer

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In this set, the complete horiz circuit is not replaceable, unless you were to replace the complete mother board.

The flyback and various failed parts may be replaced as required. There are troubleshooting procedures to determine the defective parts. This is performed by following tests and diagnostics using the service manual as a reference, and using the various test instruments to follow up for readings. This takes proper training, instrumentation, and experience to perform.

The average cost can be in the area of $160 to $250 US to service the horiz output stage, depending on the types of failures.

Jerry G.

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2 Answers

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I have had cold solder connections on the circuit board of the control panel cause this. I have also had defective switches on the control panel, or a situation where the customer sprayed water on the face of the CRT for cleaning and some of the water leaked down inside on to the control panel. In this case, there were many times where I had to replace the complete control panel.

It is also possible to have a defect in the main uPC. This type of repair can end up being expensive.

Jerry G.

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1 Answer

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In the user book, there should normaly be a list of local service reps. I am sure you can Google for RCA service parts. They can supply the parts for their TV sets if the set is not obsolete. You will find it much cheaper to buy a new set rather than buy complete populated main circuit board.

Jerry G.

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1 Answer

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I suspect that the convergence board may be defective. If the convergence was okay before and then went out, this is a fault and not an adjustment! Adjusting only compounds the fault.
Look up the Sanyo home page on the net, and get their tech support. You can order a new convergence board, and the service manual to start.

It may be more practical for you to let their authorized service rep service the set for you. It is possible that you start buying the parts, and end up needing to troubleshoot for more faults. You will need the proper tools and training to get involved in troubleshooting your set.

Jerry G.

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Panasonic changes the complete power supply for the fix.

If you want to change descrete parts, find out the cause of the failure and fix the cause before applying back the power. This is also valid when changing a complete board. A short or defect somewhere else will cause the failure to occure again!

Jerry G.

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2 Answers

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