I left my F32444 (32" RCA Entertainment Series) TV on all day by accident. When I came how it was making a high pitched squealing noise that sort of ocilates. Is there anything I can do to fix it? Or is it beyond repair?
Thanks in advance!
You would have to have the set opened up, and determine where the noise is coming from in the first place. Sometimes transformers or reactive components can become noise, due to a number of causes. Some are from failing associated components, or the reactive device is failing, or its internal windings (for example) are loosening up, or it in itself may be failing.
Your best and safest, and best solution is to call an authorized service tech, and have the set properly checked out.
In the way of repairs, the end user is very limited in what they can do, unless properly trained, properly equiped, and have the proper facilities to do TV servicing.
When working in TV sets, there are very serious safety issues to be considered.
Jerry G. ======
Flyback and HOT...!! Whats the CTC number ?/
Actually if its a ATC XXX or whatever maybe the HOT is S/C and the pin circuit also has trouble. What's the Chassis number CTC XXX?
Kip: Well, maybe... or maybe not. The OP did not say if he still had picture and sound.... AND the "high pitched squealing noise" TOO..... if so, the flylback and HOT are obviously OK, as you obviously would already know.
-- Best Regards, Daniel Sofie Electronics Supply & Repair
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Well i can only go by the little info given as always never very explicit.
QUICK! Throw a bucket of water over it!!
kip... what's the matter? Isn't your crystal ball working? You might want to check the tea leaves too !
-- Best Regards, Daniel Sofie Electronics Supply & Repair
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picture
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Kip and others,
RCA had bulletin out on switching power supply noise but that was long ago so most of chassis had the fix.
But one remain is RCA being cheap didn't secure ferrite beads on component leads. Secure them with silicone glue by dabbing them to the PCB and some to end of it to the leads. This will stop the squeal. There are four beads on two diodes on output side of power supply, usually one or two on a diode in horizontal circuit.
I had to do this frequently for this complaint and all CTC203 and ATC113 get same treatment for any reason.
Cheers, Wizard
dont forget the divining by entrails!!!
Transport unit to safe area away from children and small pets. Douse with lighter fluid. Stand back a safe distance and propel lit match at said unit. Problem solved.
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