Question about Symphonic ST427FF TV

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Main fuse blows

As soon as i plug the tv into the wall the main fuse blows.

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If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. Horizontal output possibly shorted, &, or voltage regulator, could also have bad caps in the regulator circuitry, & resistors. Pix tube can also blow the power supply. You'll have to do some troubleshooting to locate any bad parts, bare minimum you'll need a decent multimeter and soldering equipment.

Posted on Apr 23, 2006

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You may have a surge protector called a thyristor that is shorted right on the main a/c line. Or the main power supply has a major nasty short as the bridge rectifier the filter cap or the degusing coil.

Posted on Apr 20, 2006

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try a diffenrt outlet if it still bunrs of a different fuse! could be the fuse not big enough for the different appliance on the circuit !


i would suggest take it to a tech it could be a problem in the tv that could cost only a few $ to fix !!!!
against trying to much to plug it in and out you could burn transistors or other expensive part of the tv!

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Could it be in the HV circuit? first you isolate h/output section from power supply. make power supply output ok. check h/output section for short circuit 1 print short near eht 2 diodes or cap.near eht 3 yoke H winding just by removing connector 4 EHT transformer regards

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A 10 year old RCa most likly has a bad Horizontal output transistor as well as the main High Voltage transformer and The transformer is no lonmger available from RCA. The replacement wont last longer then a year if your lucky. My advice on a set this old ?? Buy a newer one!!

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