I'm thinking how come the gold band looks good?

 

Gold has a higher melting point... I know, I'm still reaching. Is the rest of my logic sound?

 

Don't think they would use real gold... you're just pulling my leg.

 

Yea, just kidding. I'll have to go with the 110Ω too.

 

Is it safe to assume that at 34k ohms the one watt resistors are bad? open? 34k seems pretty high for a 1 watt resistor in a battery charger. If my math is right you could drop 120 VAC across it and not hit 1/2 watt. If it's bad I'm guessing it got hot. And therefore band color issues. does that follow?

Resistors tend to go open when they die, sometimes just showing a higher value. For a 1W 34k resistor to overheat, a LOT of current would need to pass through it (P=I²R), so guessing under 1k is a generally safe bet.

When dealing with quarter, eighth and sixteenth watt resistors, that gets more random as to what they should be, especially if they are the blue precision resistors, which I have issues reading when they're good.

 

Thank you guys for your input. You guys are a lot sharper than I. On the resistor pictured, this is the one that did not look like it got too hot or burnt, visibly. From my end looking at the actual resistor, it still looks like Black, Brown, Black, Gold. IF, IF, IF, the colors are as noted, wouldn't that indicate a 1 ohm resistor (0,1,0,5%)? In my ignorance I will ask, could this be a resistor from a manufacture that for whatever reason went ahead and put Black in the first ring? Does that ever happen?

 

The middle bands are badly cooked, you can't rely on the colours as they are now.

The end two bands run much cooler as they are on the metal endcaps and not on the hot resistive element. But even then you can get the end bands cooked too.

As for the gold paint, that paint has a metal particle (like brass) that will keep most of its colour even when badly cooked.

If you have two that both measure about 34k ohms, it is unlikely that both have failed and happen to end up at the same faulty resistance. The likely conclusion is that they are both 33k resistors.

If you can show the circuit, and photos of both sides of the PCB that will help a lot to determine what values they likely are/were.

 

This repair was for a Ridgid lithium battery charger (Home Depot) R840091. The circuit board part # is 860231001 02. Capacitor 201 was visibly bad (bulging) and tested bad. The two capacitors were questionable and was the source of this discussion. I wanted to replace the resistors but could never find a repair sheet indicating the resistor values, not could they be obtained by the color rings. I replaced the cap and reinserted the questionable resistors. The battery charger worked fine. Does anyone know where I could find a schematic sheet indicating the values?

 

Still...I would buy a couple of 33k, 2 watt resistors the next time I place an order for parts, then replace them just to have a nice, fat, safety factor in there.