Hi, here is a PSU from a HP Pavilion Slimline S3522SC
It's a really small nice HTPC doodad with a Intel Pentium Dual-Core E2180 2,0GHz S775, so therefore heat output in the system is a problem...
It has OST capacitors in the PSU and they have been baked well by it...
5VSB was at ca 3.3v when I got it. (Thankfully it went low instead of high).
Just for testing I replaced the bulging 3300uF 10v cap in the 5VSB circuit with a Sanyo WX 3300uF 10v.
(Similar ESR and Ripple, size is 12.5mm wide vs 10mm of the original OST but it is not a problem because this capacitor spot was made to fit a 12.5mm capacitor).
After this the 5VSB was happy at 5.1v, and the system was able to POST.
Now there are more bloated caps, and I will replace them of course.
But I am curious about one thing, the small caps, I can't find any suitable replacements for those.
The originals have quite low ESR, but the variants from Sanyo, Rubycon and Samxon seem to not even list ESR? (General purpose I guess?)
So did OST just lie when they made their spec, or I really need to find these caps?
Only thing I managed to find was Sanyo OS-CON 30v, they have better ESR and Ripple, but of course they would need to be rated 50v aswell!
Or would it be ok to go up in capacitance, to say 22uF 50v where we find Sanyo WX & Rubycon ZL with exact same ripple and ESR as this OST cap? (crap?)
It's a really small nice HTPC doodad with a Intel Pentium Dual-Core E2180 2,0GHz S775, so therefore heat output in the system is a problem...
It has OST capacitors in the PSU and they have been baked well by it...
5VSB was at ca 3.3v when I got it. (Thankfully it went low instead of high).
Just for testing I replaced the bulging 3300uF 10v cap in the 5VSB circuit with a Sanyo WX 3300uF 10v.
(Similar ESR and Ripple, size is 12.5mm wide vs 10mm of the original OST but it is not a problem because this capacitor spot was made to fit a 12.5mm capacitor).
After this the 5VSB was happy at 5.1v, and the system was able to POST.
Now there are more bloated caps, and I will replace them of course.
But I am curious about one thing, the small caps, I can't find any suitable replacements for those.
The originals have quite low ESR, but the variants from Sanyo, Rubycon and Samxon seem to not even list ESR? (General purpose I guess?)
So did OST just lie when they made their spec, or I really need to find these caps?
Only thing I managed to find was Sanyo OS-CON 30v, they have better ESR and Ripple, but of course they would need to be rated 50v aswell!
Or would it be ok to go up in capacitance, to say 22uF 50v where we find Sanyo WX & Rubycon ZL with exact same ripple and ESR as this OST cap? (crap?)
Code:
[COLOR="Red"]Original Caps;[/COLOR] [COLOR="Green"]ESR; Ripple;[/COLOR] [COLOR="Red"]Replacement Caps;[/COLOR] [COLOR="Green"]ESR; Ripple;[/COLOR] Life; [COLOR="Red"]OST;[/COLOR] 1x RLG 100uF 420v 488 1x RLG 47uF 25v 100 Sanyo WX 50v 0.14 385 1x RLS 220uF 10v 0.13 405 Rubycon ZLH 35v 0.056 945 2x RLS 100uF 35v 0.072 760 Suncon WX 50v 0.074 724 3000h 1x RLS 22uF 50v 0.34 238 Sanyo WX 0.34 238 2000h 1x RLS 3.3uF 50v 0.34 238 2x RLS 2.2uF 50v 0.34 238 1x RLS 3300uF 10v 0.022 2150 Sanyo WX 10v 12.5x25mm 0.018 2770 4000h 2x RLS 1000uF 16v 0.023 1820 Suncon WX 16v 10x20mm 0.023 1820 4000h 1x RLS 1200uF 6.3v 0.038 1430 Samxon GT 16v 10x25mm 0.042 1650 10000h 3x RLS 2200uF 6.3v 0.023 1820 Samxon GT 16v 10x25mm 0.031 1910 10000h [COLOR="Red"]LTEC;[/COLOR] 2x TH 10uF 50v 45 1x LZG 2200uF 10v 0.030 1920 Samxon GT 16v 10x25mm 0.031 1910 10000h
Attached Files
(I also left the 10uF caps alone)
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