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Posted to sci.electronics.repair
Chris Jones
 
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Default ESR reading?Good/ BAD ESR value? surface mount capacitor cause ripple wavy LCD?

wrote:

I measured a new one, Panasonic FK serires 16V 10uf(Low esr), the ESR
reading is 1.4, and the old one are about 10-17(the cap's brand is
unknown)

The good value on the chart is 1.6.

Should i replace them if they are at least 6 times larger than the
value on the chart?

To consider a cap is bad ,How many times the ESR value has to be
larger than the good one ?



When the ESR is too high, the circuit doesn't work :-) That is the
criterion that really matters in the end.

Some circuits are more sensitive to the ESR of the capacitors than other
circuits. An increase of 10 times means that it is worth replacing the
cap, even though this is no absolute guarantee that it will fix your
monitor. The ESR is sufficiently high that it *might* be the problem, and
at least when you have replaced it, you will have ruled out that component
and you can move on. Also if you don't replace it, then it might stop
working soon anyway.

Chris