VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

[richr69]

Need help finding a replacement SMD fuse which appears to be OPEN on the VIZIO Inverter board VIT70063.50. The only marking on the fuse is 20, and the markings next to the fuse is 1A/76V. The dimensions are 3.34mm x 1.6mm and is 1.16mm thick. I did a quick search on Digi-Key but could not find a exact match with respect to the voltage. I'm not sure what would be a good replacement. Any thoughts??

Thanks.

[PlainBill]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Need help finding a replacement SMD fuse which appears to be OPEN on the VIZIO Inverter board VIT70063.50. The only marking on the fuse is 20, and the markings next to the fuse is 1A/76V. The dimensions are 3.34mm x 1.6mm and is 1.16mm thick. I did a quick search on Digi-Key but could not find a exact match with respect to the voltage. I'm not sure what would be a good replacement. Any thoughts??

Thanks.

I'd go with Digikey 507-1077-1-ND. It's rated for 125 volts, but a higher voltage is not a problem.

PlainBill

[richr69]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Hi PlainBill,

So the original voltage i.e. 76V, is assumed to be AC and not DC? The reason I ask is the Digikey part 507-1077-1-ND is rated at 125VAC/63VDC. I did not realize that.

[PlainBill]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Hi PlainBill,

So the original voltage i.e. 76V, is assumed to be AC and not DC? The reason I ask is the Digikey part 507-1077-1-ND is rated at 125VAC/63VDC. I did not realize that.

I have no idea if the voltage on the original is AC or DC, but I can make some assumptions based on my experience.

1. I have never seen a backlight inverter powered by AC.

2. I have never seen an inverter powered by any voltage greater than 24VDC (but I DID see a schematic that indicated jumper positions for a 48VDC inverter supply.)

3. An inverter presents a capacitive load to the power supply. Thus a sudden interruption in voltage will not create an inductive spike.

4. The voltage rating of a fuse is the maximum voltage the fuse can interrupt. Going with a higher voltage fuse never presents a problem (provided physical dimensions are the same).

PlainBill

[richr69]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Hi PlainBill,

Based on your assumptions, are you suggesting that the part you recommended, which is rated at 63Vdc, is adequete even though the original fuse is specified as 1A/76V?

Just want to make sure I understand.

[PlainBill]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Hi PlainBill,

Based on your assumptions, are you suggesting that the part you recommended, which is rated at 63Vdc, is adequete even though the original fuse is specified as 1A/76V?

Just want to make sure I understand.

Yes.

PlainBill

[richr69]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Replaced the fuse (finally) and the TV is working. Thanks PlainBill for the help.

[tom66]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

Almost a year later. What happened? Fuse get lost in the post?

[DavidOH]

Re: VIZIO 26" - VIT70063.50 Inverter Board F1 Fuse

I know this is an old thread. But I wanted to say Thank You for the info on here and two other threads I found with google. I fixed a RCA L26HD35D with no picture. The F1 fuse 1A 76V was bad. I replaced it with a PICO 1A 125V fuse from a x-main I have. The set is fixed and on it's way back to the owner. I really like this forum. Thank You.