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- Re: TV fuse
Re: TV fuse
The fuse should be checked with a meter, I have seen fuses fail inside
the end cap, and still look "ok" through the glass tube.
If it is blackened - then you will probably find the replacement will
do the same too, as shorted out swichmode chopper transistors or
Horizontal output transistors are a common fault and will usually
provide a dead short across the mains.
** AC supply fuses in TVs and PC monitors are normally required to pass the
huge current surge associated with the *de-gaussing coil * - this can
easily be 30 - 40 amps peak all on its own !!
Combined with the initial charging surge of the filter caps in the PSU makes
life pretty damn hard for a puny 20x5mm maybe 2.5 to 4 amp "T" fuse.
Also, if the degaussing thermistor becomes damaged by repeated switch on
cycles - the same AC fuse will blow.
The more service jobs I see, the less simple issues relating to AC fuse