Question about RCA P52812BL 52" Rear Projection Television

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RCA HomeTheater blew fuse. Replacing fuse just results in another blown fuse.

What is my next step?

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Re: RCA HomeTheater blew fuse. Replacing fuse just...

Check for a shorted horizontal output transistor.

Posted on Jan 31, 2008

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You may have overloaded your audio output with the external speakers(impedance or short wire problem?)as a result the audio out i.c maybe damaged which in turn may have blown one of several fuses in the power supply.maybe regular GMA type fuse or picofuses,you can try replacing blown fuse but if they blow right back you`ll need the help of a repairman

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Rca 52wh73 i replaced the fuse for the convergence and it worked for 2 days. then blew again i replaced the fuse again , now there is no power it wont turn on

your initial problem was the fuse blowing. this is usually caused by bad solder connections on fly back transformer. resolder to solve blown fuse for convergence problem. now for no power check horizontal-output transistor for short. if unit tries to cycle off&on fly back is defective. if no start-up, check capacior in 6v-line center of deflection module in-between heat sink, the top will be raised up . 2200uf/25v replace mch

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you need to replace 3 items FL231, DL231, CL230 then resolder the vertical IC and flyback conections. You can get the three components under the RCA parts category at this link.

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DId you solder the flyback transformer connections..... This is the main reason these fuses fail. THe flyback is the big black component next to the fuse. poor solder connection cause oscillations.. this fuse is only .4 amps whish dosent stand up to that well.. resolder these pins on the flyback.... the first time i replaced this fuse i failed to solder played well for 2 days then came back blown again

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Some of those models are a different version of the PTK195 chassis some dont have the fuse. in that case you will need the convergence power supply board thats what likely blew the 5 Amp fuse. let me know if you need help locating one of those power supply boards.

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Apparently, blown fuses indicate problems elsewhere in the circuit. The block is a voltage dropping resistor, has nothing to do with problem. If you think it's worth it, take to pro/tech

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ok since you have checked the main glass fuse on the little board toward the front. You have no flashing led on front of set. this is an indication that you are missing the voltage to your processor. also known as standby. fl231 and the two other little brown rectangular fuses can be blown and the set will still come up and shut down. Are You a technician? The next step i would check is to see if your getting 320 volts out of your main doubler... CAREFULL VERY CAREFULL this will hurt you. so if your not tech.. dont do it.

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