Working on an:
MSI K7D Master (MS6501)
This board blew all these caps within a few months of being put in service when it was new back in 2002. I ordered an exact replacement, swapped it out along /w the Enlight PSU for kicks and its replacement has been running fine ever since. This board (the original) has been in my shop closet the whole time. The currently in-service (replacement) board in the server is swelling some VRM caps & starting to develop stability problems. So I'm going to be fixing up this board and using it as a direct on-site hot swap.
Caps are as follows.
*See photos for really high res images, lots of good-res zoom capability.
16v 470uF (LX) - G.LUXON
Dimensions DxL: 8x11mm
Impedance*: 0.093 ohms
Ripple*: 730 mA
*nearest physical size @ rated uF
Only shows these sizes at that value in spec sheet.
8x15mm (1,000hrs 'down-size') & 10x12.5mm (2,000hrs)
This one should be able to go up to 15mm in height, just like the Chemi-Cons.
The board manufacturer chose Lelon (RXA) caps to use in place of the following Chemi-Cons in some areas. These (Lelon) caps have vented and are the ones being replaced. They have the "same specs" as the Chemi-Cons.
6.3v 1000uF (KZE) - Nippon Chemi-Con
Dimensions DxL: 8x15mm
Impedance*: 0.053 ohms
Ripple*: 1030 mA
*nearest physical size @ rated uF
Spec sheet shows larger size of: 10x12.5mm
Stepping down to 820uF yields: 8x15mm
Any larger diameter and it won't fit between the PCI slots.
Any taller and the cap would be above the height of the slot and could interfere with on-card components.
I wanted to just get all Nippon Chemi-Con's, as there are 11 of these on the board in perfect shape that correspond to the el'cheapo Lelon (RXA) caps they used that are all swollen and and/or vented+leaking.
Looking at the specs for Nichicon - HZ/HN/HM, they show the 8x15mm size. Each series shows a respective impedance of: 0.014/0.020/0.028 Ohms. *Converted from milli-ohms.
Ripple, respectively: 2210/1700/1490 mA
That's quite a bit lower than the caps that I'm replacing. Considering the undamaged Chemi-Cons that'll remain behind in the same circuit(s).
Is this a problem for either the ESR or the Ripple current?
Why are these sizes at the rated capacitance not on the respective spec sheets, custom made perhaps?
Lastly...
Knowing that Rubycon's are a high quality cap.
I'm assuming the Rubycon 6.3v 2200uF & 16v 1800uF (HMZ) capacitors aren't of a bad series/year and are safe to leave?
Date Code: T0141/T0143/T0144
That should be: Early Oct. 2001, Mid to late Oct. 2001, Late Oct. to early Nov. 2001.
Also, do I need to worry about the remaining sole X-brand cap placed between the 20-pin ATX conn. & the CPU fan header + choke?
It reads as: TAYEH 16v 100uF (RB).
*See attached photos for this cap's location & shot of cap brand marking.
Spec sheet links.
https://cdn.badcaps-static.com/pdfs/...d40d80e629.pdf
http://www.paullinebarger.net/DS/Nic...Z%20series.txt
http://www.paullinebarger.net/DS/Nic...N%20series.txt
http://www.paullinebarger.net/DS/Nic...M%20series.txt
https://cdn.badcaps-static.com/pdfs/...ab0783dab7.pdf
MSI K7D Master (MS6501)
This board blew all these caps within a few months of being put in service when it was new back in 2002. I ordered an exact replacement, swapped it out along /w the Enlight PSU for kicks and its replacement has been running fine ever since. This board (the original) has been in my shop closet the whole time. The currently in-service (replacement) board in the server is swelling some VRM caps & starting to develop stability problems. So I'm going to be fixing up this board and using it as a direct on-site hot swap.
Caps are as follows.
*See photos for really high res images, lots of good-res zoom capability.
16v 470uF (LX) - G.LUXON
Dimensions DxL: 8x11mm
Impedance*: 0.093 ohms
Ripple*: 730 mA
*nearest physical size @ rated uF
Only shows these sizes at that value in spec sheet.
8x15mm (1,000hrs 'down-size') & 10x12.5mm (2,000hrs)
This one should be able to go up to 15mm in height, just like the Chemi-Cons.
The board manufacturer chose Lelon (RXA) caps to use in place of the following Chemi-Cons in some areas. These (Lelon) caps have vented and are the ones being replaced. They have the "same specs" as the Chemi-Cons.
6.3v 1000uF (KZE) - Nippon Chemi-Con
Dimensions DxL: 8x15mm
Impedance*: 0.053 ohms
Ripple*: 1030 mA
*nearest physical size @ rated uF
Spec sheet shows larger size of: 10x12.5mm
Stepping down to 820uF yields: 8x15mm
Any larger diameter and it won't fit between the PCI slots.
Any taller and the cap would be above the height of the slot and could interfere with on-card components.
I wanted to just get all Nippon Chemi-Con's, as there are 11 of these on the board in perfect shape that correspond to the el'cheapo Lelon (RXA) caps they used that are all swollen and and/or vented+leaking.
Looking at the specs for Nichicon - HZ/HN/HM, they show the 8x15mm size. Each series shows a respective impedance of: 0.014/0.020/0.028 Ohms. *Converted from milli-ohms.
Ripple, respectively: 2210/1700/1490 mA
That's quite a bit lower than the caps that I'm replacing. Considering the undamaged Chemi-Cons that'll remain behind in the same circuit(s).
Is this a problem for either the ESR or the Ripple current?
Why are these sizes at the rated capacitance not on the respective spec sheets, custom made perhaps?
Lastly...
Knowing that Rubycon's are a high quality cap.
I'm assuming the Rubycon 6.3v 2200uF & 16v 1800uF (HMZ) capacitors aren't of a bad series/year and are safe to leave?
Date Code: T0141/T0143/T0144
That should be: Early Oct. 2001, Mid to late Oct. 2001, Late Oct. to early Nov. 2001.
Also, do I need to worry about the remaining sole X-brand cap placed between the 20-pin ATX conn. & the CPU fan header + choke?
It reads as: TAYEH 16v 100uF (RB).
*See attached photos for this cap's location & shot of cap brand marking.
Spec sheet links.
https://cdn.badcaps-static.com/pdfs/...d40d80e629.pdf
http://www.paullinebarger.net/DS/Nic...Z%20series.txt
http://www.paullinebarger.net/DS/Nic...N%20series.txt
http://www.paullinebarger.net/DS/Nic...M%20series.txt
https://cdn.badcaps-static.com/pdfs/...ab0783dab7.pdf
Comment