I am working on a drive circuit for a small refrigerator. The fridge fans would come on for about a sec, then go off, and repeat continuously. I suspected an unstable circuit. I tested all the large caps but everything was in spec. I then started testing the small value caps and found a couple that are high. The board has about 8 of the same cap which is 4.7uf/50V. Most test in the 3-5 ohms range with the ESR meter. The two suspects are testing 35 ohms and 95 ohms. These have all been pulled from circuit to verify.
I then checked them with with my cap meter and they test GOOD... I would really like some experience to chime in and confirm what I am seeing here. There is also a small pf ceramic cap in that area that would not test at all with the ESR meter but testing at .1nf with the cap meter. 102k 1kv is what is on it
I then checked them with with my cap meter and they test GOOD... I would really like some experience to chime in and confirm what I am seeing here. There is also a small pf ceramic cap in that area that would not test at all with the ESR meter but testing at .1nf with the cap meter. 102k 1kv is what is on it
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