Entertainment Center: TVs, Stereos, VCRs and DVDs - Replacement Fuse
Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.View Full Version : Replacement Fuse
HEL
05-28-02, 06:32 PM
On my old Sony TV I have a burned out fuse 125V 1.25A
I cannot locate this fuse anywhere.
It was suggested that I use a 250V 1.25A fuse instead.
Is this safe?
I cannot locate this fuse anywhere.
It was suggested that I use a 250V 1.25A fuse instead.
Is this safe?
bigmike
05-29-02, 05:28 AM
Well it will be ok. You’re more concerned with the current handling. You need to find out why it blew though. Did it blow real dark or black? Or is it still clear glass and you can see the open filament? If its blown black then there is a short somewhere, clear could be anything, a reset condition etc. tell us a little more…
Smokey
05-29-02, 07:17 AM
I'm sorry, guys, but I have to disagree about the replacement fuse. 1.25 amps at 125 volts and 1.25 amps at 250 volts says there is a difference in current carrying capabilities of the fuse and the fuse will react differently than the original. I recommend staying with the 125 volt version for safety's sake. Basic Ohm's Law says R=E/I. If "E" changes, than "R" changes. And, if "R" changes, than Wattage capabilities change (P=I [squared] R)
And wattage (in the form of heat) is what causes the fuse to blow.
As for availability, I would imagine you went to Radio Shack and didn't find it. Not uncommon. Try Union Electronics for a package of replacement fuses at
http://www.unionel.com
or perhaps Lashen Electronics at http://www.lashen.com/
But, I do concur with finding out why the original blew in the first place. Have a lightning storm recently? Could have been a voltage spike on the AC line. For that instance, it is always best to have a surge protector on the old set.
Smokey ;)
And wattage (in the form of heat) is what causes the fuse to blow.
As for availability, I would imagine you went to Radio Shack and didn't find it. Not uncommon. Try Union Electronics for a package of replacement fuses at
http://www.unionel.com
or perhaps Lashen Electronics at http://www.lashen.com/
But, I do concur with finding out why the original blew in the first place. Have a lightning storm recently? Could have been a voltage spike on the AC line. For that instance, it is always best to have a surge protector on the old set.
Smokey ;)
bigmike
05-29-02, 07:35 AM
Now don’t get me wrong, I don’t really recommend going to the higher voltage but in an urgent situation I would take the risk. I kind of him-hawed around that in original post. I tried to find that fuse on Radio S. site and called them local, no go. Called my local electronics supply house and they can have them in a few days. Seems it’s not a popularly used fuse although I have seen them in some audio equipment in the protection circuit. This is not as bad as say wrapping the fuse with tin foil!
Smokey
05-30-02, 07:18 PM
Mike, you are my hero! All I wanted to do was make sure this was an "emergency" change and not one that was really "accepted practice". And, yes, I'm guilty of making this change in the field while I got the correct replacment. But, for the record, I always went back and changed fuses when I got the correct one in stock.
Smokey ;)
Smokey ;)