I've found out that the all the Nichicon HM(M) caps on this board are faulty and need replacement. However, I didn't plan in advance and I don't have good replacement caps.
The original values are 2200uF, 6.3V, 5mm pitch. According to the datasheet, the rated impedance should be around 13-18 uOhms.
There are 8 of them, 3 to the left of the CPU socket and 5 on the bottom, very close to the northbridge. They are all connected, according to my multimeter.
I think I recall hearing that I don't have to use the same capacitance for in series caps as long as the total capacitance remains the same. For instance, I'd replace 3x2200uF by 2x3300uF. Is that right?
So here's my dilemma:
· Replace all these caps with Jackcon caps that I sourced locally (2200uF, 6.3v, 44mOhms ESR according to my MESR-100V2 meter).
· Mix capacitors. I could replace 6 of the 2200uF with Panasonic FRs 3300uF and the remaining 2 with 2 old but unused Nichicon HM 2200uF (3.5mm pitch but I guess that's not a big deal).
I should be receiving soon more FRs, including just 5 2200uF 16V, 10 1800uF 6.3V, 1000uF 6.3V. And 10 polymers, SEPC 6.3V 1500uF.
What should I do?
Thanks!
The original values are 2200uF, 6.3V, 5mm pitch. According to the datasheet, the rated impedance should be around 13-18 uOhms.
There are 8 of them, 3 to the left of the CPU socket and 5 on the bottom, very close to the northbridge. They are all connected, according to my multimeter.
I think I recall hearing that I don't have to use the same capacitance for in series caps as long as the total capacitance remains the same. For instance, I'd replace 3x2200uF by 2x3300uF. Is that right?
So here's my dilemma:
· Replace all these caps with Jackcon caps that I sourced locally (2200uF, 6.3v, 44mOhms ESR according to my MESR-100V2 meter).
· Mix capacitors. I could replace 6 of the 2200uF with Panasonic FRs 3300uF and the remaining 2 with 2 old but unused Nichicon HM 2200uF (3.5mm pitch but I guess that's not a big deal).
I should be receiving soon more FRs, including just 5 2200uF 16V, 10 1800uF 6.3V, 1000uF 6.3V. And 10 polymers, SEPC 6.3V 1500uF.
What should I do?
Thanks!
Attached Files