Strange Resistor Color Code Identification Help YL,VL,GLD,GLD,BLU

[Mikek400]

I have a dark brown 2W(I think) carbon composite resistor that has
the color code Yellow Violet Gold Gold Blue

I have no idea how to read this resistor with gold being the third digit. It measures open circuit on the ohm meter so I can't find its value that way.

It is at the input of a SMPS on a refrigerator control board before the full wave bridge diode array.
I have seen pics where the resistor appears to be a different code than mine. The other code I have seen is Yellow Violet Gold Silver Blue.
The TNY267G before the transformer is shorted out and that seems to have killed the resistor.

It is R65 on the right hand side of this picture at the bottom above the blue MOV. This isn't my board but one of the many pictures I have seen of it online with the silver stripe instead of gold.

Any help would be greatly appreciated! I've got a new TNY267GN and some opto isolators that seemed to be burnt out along with new caps on the way from digikey. Hopefully can get this thing fixed.

[Mikek400]

Here is the actual resistor.

[golden_labels]

Possibly:
digit1 | digit2 | multiplier | toleance | temperature coefficient
That would be: 47·10^-1Ω, 5% tolerance, 10ppm/K.

[admiralk]

the color code Yellow Violet Gold Gold Blue

Are you sure you are reading that the right way around?

[Mikek400]

No, Im not sure which way is correct. It could start from blue but then it would be blue gold gold violet yellow, which doesn't make any sense at all either.

I think the reply from golden_labels makes the most sense. I thought it might be a 4 band resistor code with some extra band at the end. The only other conclusion I can come to is that they ran out of paint and substituted gold for some other color, but seems unlikely.

[SilverSolder]

What an odd resistor...

I found this ancient color coding scheme, which supports @golden_labels' suggestion (but does not cover the temperature coefficient).

[drussell]

I agree with golden_labels above, probably 4.7Ω 5% tolerance, 10% temperature coefficient.

That sounds about right if it is intended to provide a little bit of "cushioning" on a power input.

How exactly is it being used in the circuit?  When you say it is being used before the bridge rectifier, you mean it is right on the mains coming into the primary side of SMPS, right?  It is difficult to know for sure just looking at the top of the board how it is connected.

The difference between the gold/silver band that you have seen elsewhere would be 5% vs 10% tolerance, which wouldn't be critical in this application.  Interesting that it does look like carbon instead of the typical flameproof fusibile-style resistor that would often be used in such a position if that's really what it is.

[David Hess]

4.7 ohms 5%

[madires]

It's a fusible resistor 4.7Ω 5%. The blue color band is the manufacturer's way to indicate the resistor type. Other manufacturers may use a different color.

[Mikek400]

drussell,
It is directly connected to mains coming in and then connected to the bridge rectifier.  That being the case, what madires says about it being a fusible resistor makes a lot of sense, because it would be working as a fuse as well.


Thank you everyone for your help and input.  I don't have any fusible resistors so I might just add a small fuse to the input for safety after replacing this and getting it working.