LG 55UH7650-UA needs a capacitor!

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

I checked the fuse. It's showing .28v with the power on. The other fuse on the board stays at 0v.

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

Fuses are checked for resistance with a multimeter; a working fuse should show a short circuit!

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

When I set it to Ohms it bounced around all over the place. DigiKey's website recommends checking voltage for a fuse that's in-circuit. A working fuse should show 0v.

Is .28v an indicator that the fuse is bad? Or is that close enough to 0 that it's good?

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

You need to unplug (de-energize) the TV from the outlet, and then measure the resistance of the fuses.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

You need to unplug (de-energize) the TV from the outlet, and then measure the resistance of the fuses.

I will recheck this later. Thanks.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

I checked it and I get 1.000 both ways. My meter only has one ohms setting so that's what I used. The other fuse read good.

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

As I thought, it was this one that burned down?

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

As I thought, it was this one that burned down?

Yep. The one with the red stripe. Question though, do 125v and 250v fuses have to be checked differently? I checked another suspected good 250v fuse and it also read 1.000, but when I checked a 125v it tested good. Meter is set to AC and Ohms (the only seeing I have).

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

Any serviceable, working fuse should show 0 Om on the multimeter; a faulty, non-working fuse will not show anything.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

Any serviceable, working fuse should show 0 Om on the multimeter; a faulty, non-working fuse will not show anything.

So the first thing I should do now is replace that fuse and see what happens? All I have on hand is the one I tested that was the correct fuse but also showed 1.000, and a couple 7.5A 250v. Would it not be a good idea to replace a 5A with a 7.5A?

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

At this point, this is not the best option, since mosfets and diodes have not been tested, it is better to use a 100W incandescent lamp instead of a fuse for testing; if the power supply works, then install a regular 5A fuse.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

At this point, this is not the best option, since mosfets and diodes have not been tested, it is better to use a 100W incandescent lamp instead of a fuse for testing; if the power supply works, then install a regular 5A fuse.

I've heard of the light bulb thing but I've never done it. How would I connect it in place of the fuse? Incandescent bulbs were banned in the US a few months ago. I may have a 100w, or possible a 3 way. Otherwise I think all i have is 60w.

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

Solder a lamp socket with two wires into the place of the fuse or solder it on top to the ends, try at 60w, if not at 100w.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

Ok. When I plug it in the bulb shouldn't light if the circuit is closed (no bad components), correct? Lights up = bad?

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

Yes, it should not burn; when turned on, it should flare up a little and go out.

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

Does it matter which wire goes where in regards to positive and negative?

[vinceroger69]

Re: LG 55UH7650-UA needs a capacitor!

Does it matter which wire goes where in regards to positive and negative?

no does not matter

[lotas]

Re: LG 55UH7650-UA needs a capacitor!

The fuse does not have a positive or negative terminal, and neither does the lamp!

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

I did not think so. I'll tackle this tonight and report back my findings. Thanks a lot for the help!

[x_orange90_x]

Re: LG 55UH7650-UA needs a capacitor!

Results are in... The bulb stays lit ��