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what will make a fuse blow on the power board for TV

 
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cisco.tech



Joined: 05 Dec 2010
Posts: 3

PostPosted: Sun Dec 05, 2010 5:55 am    Post subject: what will make a fuse blow on the power board for TV Reply with quote

Hi
I have a Toshiba 42rv530u, It does not power up so I took the back off it.

I have downloaded a PDF that tells me to look for specific vdc on specific pins, this I have not done yet.

I am looking at it tonight with the magnify glass and see a fuse look funny, I checked with my fluke mm and it reads faulty. (the fuse) < bad.

Can I just buy a new fuse or would I need to verify what blew the fuse first?

thank you very much for any help.
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train123_not logged on
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PostPosted: Tue Dec 07, 2010 4:03 pm    Post subject: Reply with quote

Well, it really depends on what section the fuse was attached to and how you want to tackle the repair.

There has been the rare case where just changing the fuse fixed the problem.
Typically all fuses are rated so that they will never will blow during normal operation conditions so something abnormal happened in your TV.
If the fuse blew because of a shorted part, your new fuse will blow again.
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cisco.tech



Joined: 05 Dec 2010
Posts: 3

PostPosted: Thu Dec 09, 2010 12:21 am    Post subject: Reply with quote

Thanks for replying

the board has 2 fuses: (typical glass removable).

1 is near the power Vac input jack, the other is the other side of the board.

If it is possible to buy just the schematic for the power supply and fix it I would choose that.

what do you think?

thank you
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cisco.tech



Joined: 05 Dec 2010
Posts: 3

PostPosted: Thu Dec 09, 2010 12:23 am    Post subject: Reply with quote

the far side fuse is bad the one by the Vac input is good
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