Comments on: Will Freeze Spray Temporarily Lower The ESR Value?

By: John Preher

John Preher — Fri, 08 Jan 2010 20:00:04 +0000

just to clear any confusion I meant to say the values listed on the front of the meter are averages values.

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By: John Preher

John Preher — Fri, 08 Jan 2010 09:53:49 +0000

Jorge, remember the ESR values on the meter are only average values. Sometimes an ESR may be High for the circuit the capacitor is in even though it seems pretty low. You need to also compare with good capacitors not just your chart. I had a projection TV the other day with bad DM module symptoms(continually flashing timer light, green light of death), I removed the DM module and checked the ESR of the 7 1000uF 16V capacitors in the DM module power supply(these often cause DM failure), all had an ESR of around 0.5-0.7 ohms, which seems pretty low but it is too high for this circuit, it should be around 0.04-0.07 ohms for each of the capacitors. Relacing the 1000uF 16V capacitors caused the TV to start working perfectly again.

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By: admin

admin — Fri, 08 Jan 2010 01:22:28 +0000

Hi Jorge,

Thanks for sharing!

Jestine

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By: jgmanza

jgmanza — Thu, 07 Jan 2010 04:45:05 +0000

Hello Jestine,
Happy New Year.

I got my esr meter in November, and I have yet to find a electrolitic with high esr. What I found was 200v 220uf electrolytic with low esr of 0.4. When i double checked with my analog meter it was shorted. Taking the cap out of circuit showed the same results. A replacement restored the tv to work properly.

Best Regards
Jorge

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