What are these?

[deandadnaed]

Hi! I’m trying to find the tracks within a PCB. But I’ve got no idea what are these components.


Does anybody know what are they?



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[OwO]

Potentiometer.

[Brumby]

Trim pots to be more precise.

They are adjusted by a small flat blade screwdriver via the slot in the middle.

From the numbers on them, the resistance of each are:
 103 = 10K ohm
 202 = 2K ohm
 503 = 50K ohm


Edit:
They are placed in circuits that need to be adjusted when they are first built and tested.  Once adjusted, they should not need any further tweaking in normal service.  Translation: Don't fiddle with them unless you know what you are doing and why.

[Jwillis]

Like Brumby says. But in addition  The first 2 numbers times the multiplier.  0 = 1 , 1=10 ,2=100,3=1000,4=10000 ,5 =100000. So the top left is 10 times 1000 or 10000 ohms or 10K Ohms.The top right is 20 X 100 or 2KOhms and so on

[deandadnaed]

Thank you very much!


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[Brumby]

If you're tracing out the circuit, the bottom two connections are fixed to each end of the resistance track.  The third connection comes from the moving contact which is connected to the tag at the top.

[digsys]

... and those look like a ceramic type, which are much higher quality / grade than the "standard" plastic types.

[deandadnaed]

Thank you. I’m trying to trace the circuit. I won’t be messing with the trim pots but I’ve measured them as they were set, just in case.




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[Smokey]

For example (Tried to find pots that look like the ones in the pictures.  Don't buy these specific ones, they are obsolete):
https://www.digikey.com/product-detail/en/bourns-inc/3319P-1-102/3319P-102-ND/612867
https://www.digikey.com/product-detail/en/panasonic-electronic-components/EVN-65AA00B23/K4A23-ND/6092