tv blows fuse
in [Repair]
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From: b on 29 Mar 2007 07:30 Steve45 wrote: > hi folks i'm new to this forum and have a question . i have a sylvania > srt2127s that blows the fuse as soon as i plug it in. I just started > messing with busted tv's as a hobby because i recently had surgery for > a work related accident and needed something to keep my mind and my > hands busy. I just fixed an old sanyo that just needed a couple of > capacitors and now i'm trying my luck with the sylvania.please talk in > layman's terms as i am not tech educated. pictures or diagrams of parts > to check or replace would be very helpful. thanks,wish me luck! I agree with the other posts in this thread. May I add that a quick initial test might be to disconnect the degauss coils from where they plug into the circuit board (they're the loop of plasticky wire going round the back of the tube near its perimiter). power up and see. you may need to replace the 3 legged (or sometimes 2) posistor. incidentally, it is advisable to wire a 100w bulb in series with the mains input - over the internal fuse maybe. if it shines you still have a dead short; if not then you're probably OK, that way you save fuses. -B.
From: James Sweet on 29 Mar 2007 16:05
powerampfreak wrote: > On 29 Mar, 10:11, James Sweet <jamessw...(a)hotmail.com> wrote: > >>powerampfreak wrote: >> >>>On 29 Mar, 02:47, Steve45 <Steve45.2o6...(a)diybanter.com> wrote: >> >>>>hi folks i'm new to this forum and have a question . i have a sylvania >>>>srt2127s that blows the fuse as soon as i plug it in. I just started >>>>messing with busted tv's as a hobby because i recently had surgery for >>>>a work related accident and needed something to keep my mind and my >>>>hands busy. I just fixed an old sanyo that just needed a couple of >>>>capacitors and now i'm trying my luck with the sylvania.please talk in >>>>layman's terms as i am not tech educated. pictures or diagrams of parts >>>>to check or replace would be very helpful. thanks,wish me luck! >> >>>>-- >>>>Steve45 >> >>>Hi, >>>Your description indicates a "primary-side" failure, in other words, >>>the side which is not >>>galvanically isolated from the mains and need great focus to not kill >>>yourself during repair. >>>A wild guess, would be a shorted input rectifier or a shorted >>>switching transistor in the TV's switchmode powersupply. >>>I've even seen damaged mainscords with internal shorts! Maybe a dog >>>chewed on it. This would of course lead to a fuse blow before pressing >>>mains switch on the set. >>>I'm not familiar with this specific set, but that's general TV tips. >> >>>Good luck! >> >>>--- Steve >> >>Well assuming he's in North America, the mains plug is not fused. The >>only circuit protection we have here aside from the fuse in an >>individual piece of electronics is the 20A breaker on the branch circuit.- D�lj citerad text - >> >>- Visa citerad text - > > > I believe he means the internal fuse in the set, don't you think? > > Yes, I'm pretty sure he does. I was replying to another response to his post. |