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Old 06-09-2025, 02:06 PM
luRaichu's Avatar
luRaichu luRaichu is offline
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Join Date: Mar 2024
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I pulled C322 and C427 today but the cheap LCR-T4 I bought only measures their capacitance, not ESR.
C322 rang up as 50pF on both the LCR and my multimeter!
It should be 220nF. The code on the package is 224J which means 22 x 10^4 = 220000pF with 5% tolerance. The second line says MP400 which I assume means rated 400V DC.
https://files.catbox.moe/7prbnh.jpeg
I’ll find a replacement mylar cap on DigiKey but let me know if there are any special considerations to be made.

Here is C427. Measured capacitance was close enough to 330pF.
https://files.catbox.moe/w1rpj1.jpeg
Should I replace it? I still don’t know its ESR.
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Last edited by luRaichu; 06-09-2025 at 02:13 PM.
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