Question about RCA F32669 32" TV

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Dead tv It started out with no picture, then it worked great for about three weeks. All of a sudden the picture went out & made a high pitch squeal. I had to unplug it. the next day I plugged it in and somthing made a sizzling noise and smoked. The tv is completely dead and r14108 & Q14103 were fryed. Anyone know what these components are/ values, where to buy? There are no tv repair shops whithin 150 miles but I am pretty good at soldering circuit boards if I can get parts.

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That is typical with these units, The Horizontal output transistor and flyback go out in the RCA's 9 10ths of the time and causes this situation.

Posted on Sep 15, 2007

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Need to check the ground path on the squealing relay. A poor ground will cause this condition.

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Check the horizontal output section circuit. It sounds that the LOT {Line Output Transformer} has damaged.

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the high pitch squeal indicates shorted component/s. the transformer goes hot co'z its being overloaded by the shorted component, it too could be the one creating the squeal!!

if you have experience with electronic troubleshooting, try to test some of the components particularly on the secondary part of the transformer.
Be careful and make sure the TV set is unplugged.
test for shorted diodes and transistors, if you're in doubt of your readings try to desoldering one leg of the diode then proceed with the testing/measuring. replace any of the bad components you find exactly with same part number or replacements with the same rating.

spend more time on it resoldering some other cold soldered components.

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What has happened is that the horizontal output transistor has shorted. The squeal you hear is the power supply running under a heavy load. The picture narrowing or being distorted indicate that the horizontal output was not operating clean. Something in the output section was not as it should be. Possible short in the output transformer/tripler unit or something loading down the secondary voltages generated by the horizontal output. You will need a tech to figure this out....If you are not a tech, then this ones a goner as far as fix it at home goes.....If you are a tech I might be able to talk you through the repair. Have someone remove the horizontal output transistor and I bet the squeal goes away.

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1 Answer

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Your set is shorted circuit condition. The power supply is making the noise. Unfortunately almost any of the hi current circuits will do this. If picture went out 1st look for video or hi voltage problems.

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The high-pitched squeal usually indicates that the horizontal drive circuit has failed as a result of a dead line-output transistor. This symptom indicates that the control circuit of the main power supply is trying to over-compensate for a greater than usual secondary current. Certainly, an inspection of the line-output transistor will show that it's most likely dead. Sometimes instead of the squeal you will hear hiccups instead. Focus your attention on the horizontal circuit.

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1 Answer

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check for high voltage s3ection of your TV. A Flyback transformer is defective especially in the high voltage cale of your flyback....

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