32'' Panasonic TV, 4 yrs old, keeps blowing the fuse
Hi tnt_guy, I was wondering if you could help me about this fuse problem I keep having. The original fuse, I think it was a 5.6A blew when the TV was not even 4 yrs old, last fall. I could not find a 5.6 so I bought a couple of 6A fuses. All was good until about a month later it blew the new one. To keep the story short, since then I replaced it already about 6 times in less than 6 months. Panasonic is referring me to a repair shop, which wants too much to come out and look at the TV.
My question is, would the .4 A difference make much of a difference and be the reason for such frequent fuse replacement need?
My other question is what could be the reason for all this.
I had a similar problem, in that I could not find the proper fuse for my set. I bought a bit higher amp fuse from Radio Shack and it ended up blowing a couple months later. I've since pulled the TV down and replaced it with an LCD set, so I've solved my problem.
But, to address yours, I don't think the amp difference would not be the problem. Likely, there is a power issue on your set causing it to draw more amps and become out of specification. Using a higher amp fuse would buy you more 'capacity', but if its blowing those too (repeatedly), its likely a real problem in the set. I'm not a TV technician, so I can't tell you why. I'd suggest taking the thing in for service (cheaper than the house call) or if that is too expensive, looking at putting your money into a set that won't give you those problems. Or, just keep replacing the fuse until it doesn't fix the problem.
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take the back off the tv and inspect the glass fuse off the ac power cord, it will probably be black and open, this is a common problem, it blows because the degaussing circuit works too slow, the original fuse is an 6.3 amp fuse, you need to replace it with a 6.3 amp slow blow or a 7 or 8 amp fuse to keep it from blowing, if you put an original 6.3 amp fast blow fuse in it, it will work for a while, but will blow again someday.
It has a short circuit somewhere...
Not sure if this is a CRT, LCD or Plasma TV but the two common causes
of shorts for CRT's are the Horizontal Output Transistor (HOT) and/or
the Flyback Transformer (Could be both). As a general rule if the
flyback has visible cracks in the case they should be replaced. It is
also a good idea to replace the HOT if you're replacing the flyback as
it could be weakened and may not last much longer itself.
Other areas to check for all types would be any Diodes in the Power
Supply Circuit. If a diode is open it can cause the fuse to blow. Note
that a diode itself will not short, but an open diode can cause a fuse
Sounds like it could be H.O.T which stands for horizontal output transistor or a fuse is possible. Another possibility is the FLYBACK transformer. Is there a local repair facility you could take it too? Keep me posted. Have a good day...Jay
means you have a part that is dead shorted after the line fuse, usually a bridge diode, regulator IC or possibly the Horizontal output transistor. Not really something a non tech will be able to find, a volt Ohm meter is required as well as soldering equipment.
While on ebay and looking up my set i seen a pcb for a Toshiba 32" but can't remember the exact set number, i think it had HF in it, but not sure...it was from a dealer cleaning out old stock, he said $165 retail and was selling it for $105. Maybe just keep checking there, he may repost the sale again.
Hi your problem is that a component(s) inside your TV has probably short circuited to Earth, this then causes a massive current to flow and this blows the fuse.
Due to the types of Component failure from this, this TV should go to a reputable repair shop. Get a firm "Quote" and an explanation of what needs to be done.