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Trying to repair a Hyperkin Duke Xbox controller where the left trigger doesn't respond. Found that the resistance of this potentiometer doesn't change when it's moved, so I'm looking to replace it. I'm a novice with this stuff though and I'm having trouble identifying it. Any help is appreciated.
Found that the resistance of this potentiometer doesn’t change when it’s moved
Are sure you're measuring across the correct terminals? The resistance between the two terminals of the resistive portion is constant. I would expect the resistance of a failed pot to either be zero or infinite
It might not even be a potentiometer, more likely an encoder
There's a test pad on the PCB labeled "LT" (left trigger). I used that and compared it's resistance to ground to that of the right trigger's test pad. I got about 6-10k ohms on the working one (right trigger), and 3.9-4.4 on this one.
How many pins does it have in the circuit board?
Someone said it might be an encoder but I see "103" on it which is used on potentiometers to indicate 10k ohm (10 x 10^3)
It has 3 pins, and I found that it's a linear (B), 10k ohm (130, as you said), potentiometer. I found similar ones, but the 9 and 5 at the top concern me. The others that I found have a 60 and a 6 there instead.
Linear checks out for this kind of application.
Potentiometers are pretty basic things. About the only thing I can think of that would be specified electrically is value (10k), wattage rating (but I doubt much current is sent through these in this application), linear/logarithmic taper, tolerance (often 5%, or 10%) and maybe the type of contact/track or something (probably doesn't matter).
Those numbers could be manufactured date or lot codes or similar.
How does the thumb "wheel" attach? Or is it built in? I can't tell from the single pic.
Other things to consider are the pin spacing and physical dimensions.