Good day all,
I have a question about some old monochrome Apple monitors.
Inside those monitors there is one bipolar capacitor. From the schematics I have it's part of the horizontal linearity circuit.
A friend replaced a bipolar 4.7uF 25V capacitor with a Nichicon bipolar 4.7uF 25V. The cap popped after about one hour. The new capacitor was much smaller than the original one but that's not a surprise as the original one was from 1980. (I am not sure whether the original was was actually 4uF and was replaced with a 4.7uF?)
The new capacitor: https://www.digikey.co.uk/en/product...4R7MDD/2539572
The general consensus is now to use FILM capacitors - mostly because those Bipolar electrolytic are not easy to find anymore.
My question is: why would a good quality BP cap pop in this scenario?
Thank you!
I have a question about some old monochrome Apple monitors.
Inside those monitors there is one bipolar capacitor. From the schematics I have it's part of the horizontal linearity circuit.
A friend replaced a bipolar 4.7uF 25V capacitor with a Nichicon bipolar 4.7uF 25V. The cap popped after about one hour. The new capacitor was much smaller than the original one but that's not a surprise as the original one was from 1980. (I am not sure whether the original was was actually 4uF and was replaced with a 4.7uF?)
The new capacitor: https://www.digikey.co.uk/en/product...4R7MDD/2539572
The general consensus is now to use FILM capacitors - mostly because those Bipolar electrolytic are not easy to find anymore.
My question is: why would a good quality BP cap pop in this scenario?
Thank you!
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