Main fuse blown on CT-32G11 32" Panasonic TV, Replacement fuses continue to blow.
While the TV was on and operating perfectly, the main fuse blew, shutting down audio and video. Replacement fuses have also blown when depressing the power switch. Three years ago, the same Panasonic CT-32G11U had a problem with turning off then on intermittently. A serviceman re-soldered several points on the circuit board which successfully fixed the original problem. Any suggestions has caused the main fuse to blow? Thanks!
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If too much current passes through the microwave circuitry, the line fuse will blow. If the line fuse blows, the microwave won’t start. To determine if the line fuse is at fault, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. In addition, you should investigate and resolve the problem that caused the fuse to blow. If you don’t resolve the underlying issue, the new fuse will blow too
Main Control Board
The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—check all of the more commonly defective parts. If you have determined that all of the other components are working properly,replace the main control board.
The thermal fuse cuts off power to the microwave if the microwave overheats. To determine if the thermal fuse has blown, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. The thermal fuse cannot be reset—if the fuse is blown, it must be replaced.
Since its a electrical isue cal a liscenced professiona to resolve the issue . Your microwave oven isnt at fault . I belive the supplay to it has issue and would have blown anyway.
The main a/c fuse is likely blown -6.3A 250VAC- Replace with a 7A 250VAC.
To replace - remove back cover - once removed follow a/c cord to TV and fuse is on the board close by. google "GMA fuse" images to see what fuse looks like -the one without leads -clip in type.
The power supply board itself maybe the main problem inside the TV. Or, it maybe something simple like a blown fuse. Replacement fuses can be found at Radio Shack or some other electronic supply store.
If it turns out the TV keeps blowing fuses, the main power supply may need to be replaced. You can find replacements at a good price at Shopjimmy.com
This is a problem with the main poiwer supply. It could be simply a shorted rectifier diode or more complex. Without taking measurements inside the set or at least seeing what the condition is of the board, there is little we can do to help. This unit shoul dbe brought to a service shop with a request for a detailed estimate. Armed with that info, we should be able to guide you through the actual repair. Expect to pay $50 or more for the estimate.
I have one of those that is the same age and the 6.3 amp fuse was blown out. I replaced it with a 6 amp fuse (i could not find 6.3 nearby) and got a few more weeks use until the fuse blew out again. someone suggested i get a slow blow fuse next time.
You will need to remove the back of the TV. Don't worry, it's not that bad.
There are 4 screws across the top, one on each side, one right next to
where the power cord goes into the back of the case, and the two more
by all of the video connections **These are the most important to
remove because they attach the main board to the back of the case.
Once you have remove the screws then the entire back of the set will
slide off. If you look where the power cord attaches to the board you
will see a small fuse. This is a 6.3 Amp 125 volt fuse. You can replace
it with a 6.3 Amp 250 volt fuse from your local Radio Shack. A four
pack costs between $3 and $5.
Make sure that you check that it works before putting it all back
together. Check for any loose connection cables while you're back
there. I found a few when I did this.
all sets must have rated fuse for protection. some units now use what is called a PICO-FUSE.this type of fuse is soldered into the pc board. usually marked with location i.d. F301,F901,F400. etc. these fuses look like resistors or in-line coils. check continuity w/ohm meter. if new fuse blows as soon as you plug in tv, suspect bridge diode ciruit or main filter cap(large ripple filter by main fuse. if new fuse blows when you try to turn on, suspect 130v regulator or high voltage short(horizontal-output, flyback transformer) good luck!