Is there capacitor layout for NF7-II?

[bshi02]

I desoldered bad capacitors on ABIT NF7-2 mainboard,but All these desoldered caps go away by mistake,and I can't know what uf or voltage value is for respective capacitor holes.
I presumed large holes is a seat for 1000uf caps but wondered whether small holes is for 10uf or 100uf or other else value.
After all,I managed to soldered 1000uf caps to all large holes and 100uf to all small holes. but My PC frequently fail to recognize original CPU clockspeed[wrong CPU clock indication on POST SCREEN] and Front USB port turn on and off repeatedly.
I think these symptom is caused by wrong value capacitors which I soldered by false supposition, and I want to replace it with correct value capacitors, in order to this fixing work I need NF7-2 capacitor layout.
Is there any site where provide Capacitor Layout or Motherboard Schematic for ABIT NF7-II ?

I'm very sorry for my weird English which may disturb to understand meaning of my posting.

[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

You won't find a schematic.

Short of someone in a forum having one to look at, the best thing to do is hunt on review sites and ebay for good photos.
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[bshi02]

Re: Is there capacitor layout for NF7-II?

Of course,Using google search engine I checked many screenshot from review and public auction site like ebay,but None of these NF7 mainboard screenshot has clearness photo enough to distinguish uf value written on caps.Moreover I need to know almost Every small size capacitor's uf value.

[bshi02]

Re: Is there capacitor layout for NF7-II?

Yesterday,I visited local Abit service center and finally,I drawed each location of almost entire capacitors on NF7-s v2.0 MB in their warehouse.
Then I found that NF7 capacitors is consist of rubycon's ZL,YXG,MBZ capacitors and I need to replace those YXG caps. but Out of All Rubycon YX series, The only capacitor I am only able to purchase is YXA capacitor in my local area.

Is it Okay and Would there be no side effect,If I replace those YXG caps with YXA instead of originally used caps for soldering task?

[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

You don't have to have ZL, YXG, and MBZ,,, you just need caps with the same or better specifications.

For the YXG - What is the: uF, Volts, diameter?
From that I [or you] can look in the data sheet and find the Ripple and ESR ratings.
Once you know all 5 of those numbers you can look for equivalent replacements.
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[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

I looked at a few sizes in the data sheets.
YXA is NOT good enough to replace YXG.
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Nichicon HE and Chemicon KY are equivalent to Rubycon YXG.
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ZL are better rated than YXG so if you can't find anything else you can use ZL to replace the YXG.
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[bshi02]

Re: Is there capacitor layout for NF7-II?

thanks very much for repid reply.
I have needed to replace a quite number of rubycon YXG caps of 6.3v 1000uf and 25v 100uf,and it seems I might need to refund YXA capacitors which I already bought and should look for HE or KY capacitor series from other online store, otherwise I should search for a certain suitable capacitors from samwha online store(www.samwhatech.co.kr)

It might be out of this thread, I have a spare P3 comp and I desoldered a few bulged "[G-LUXON] 6.3v 2200uf LZ105˚C 1037(M)",and "[TEAPO] 6.3v 1000uf SC105˚C 03/01 A3" capacitor a few month ago.(teapo capacitor has gold color character, in contrast G-LUXON has grey color)then I replaced these bad caps with rubycon YK caps which has same uf value.
This P3 comp seems to work correctly for the present,but I think I have chosen wrong Characteristics caps at that time.
Is rubycon YK caps not substitute for above mentioned G-LUXON and TEAPO caps?

[bshi02]

Re: Is there capacitor layout for NF7-II?

I just found TEAPO SC series datasheet,and Rubycon YK will not be substitution at all for any MainBoard specific capacitors and Teapo 6.3V 1000uf Rated cap has similar impedance and ripple current value with rubycon YXG,But can't found LUXON's datasheet.G-LUXON seems to shut down their own site.
Those luxon's cap is locate on CPU socket.I have seen mainboard usually has low-esr caps near CPU socket and Most of low-esr caps seems to surpass any features of normal or mainboard specific caps.Can I use rubycon or any manufacturer's low-esr caps for a substitution for Luxon?

[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

Samwha are unreliable. I wouldn't use them.

YK are only temp rated for 85C. - Best to use 105C rated caps on motherboards.

~~~
I have G-Luxon LZ data sheet and checked.
G-Luxon LZ specs are an exact match to Teapo SC when both list the same size cap. Most sizes are in both series.
So, you can get by looking at the Teapo SC data sheet for G-Luxon LZ.

~~~
Here is the deal on choosing replacements.

These caps 'job' is to pass Ripple Voltages to ground.
The intention is to make the power nice clean DC with little or no Ripple voltage mixed in it.

The Ripple Current rating tells you how much Ripple current the cap can pass to ground without overheating.
- Higher numbers are better.

The ESR/Impedance number tells you how much 'resistance' the cap has to passing Ripple through it.
- Lower numbers are better.

GP [General Purpose] caps are not low ESR and will not have ESR listed in the data sheet.

~~~
"Low-ESR" - "Ultra-Low-ESR" - "Very-Low-ESR"
These terms have no standardized [official] definitions and so are pretty much meaningless because different manufacturers use different definitions.
One brand's "Low-ESR" might be the same as another brand's "Ultra-Low-ESR" and yet another brand's "Very-Low-ESR".
- All you can do is look the specs up in data sheets and compare.

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Within a given series [make/model] of cap the ESR and Ripple ratings change with THE CAN SIZE, not with uF and volts.

To compare 'grades' of caps pick a can size [for example 8x20mm or 10x20mm] and look at the ESR/Ripple only for that can size to compare.

- Notes:
- Data sheets for some cheap brands are erratic / inconsistent. They also often exaggerate their specs.
- When comparing two series sometimes one diameter will be an exact match while another diameter is not. An example is comparing Panasonic FJ to Rubycon MBZ. The 10mm sizes are exactly equivalent but in 8mm sizes FJ are better.

~~~

Example of what to look at and how to compare:
- All shown are 8x20mm [Same can size is important or it won't work]
Format: Make / Series / Ripple / ESR

Ruby / YXA / No 8x20mm but ESR not listed anyway -> these are GP caps.

Teapo / SC / 800-1080 / 0.051-0.069 [cheap brand, inconsistent data sheet]
G-Luxon / LZ / 800-1080 / 0.051-0.069 [cheap brand, inconsistent data sheet]

Ruby / YXG / 1050 / 0.069 [Good brand, equivalent to or better than LZ and SC.]

Ruby / ZL / 1250 / 0.041
Nichicon / HE / 1250 / 0.041
Chemicon / KY / 1250 / 0.041

Ruby / MBZ / 1870 / 0.019

Panasonic / FJ / 1870 / 0.016

~~~
If you are having trouble finding replacements for YXG, LZ, and SC I would upgrade.
HE, KY, and FK [Panasonic] are one step up.
ZL, Chemicon KZE, and Nichicon HD are two steps up but should be fine.

.

[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

.
Whoops,,, I screwed part of that up..
.

Ruby / YXG / 1050 / 0.069 [Good brand, equivalent to or better than LZ and SC.]

Ruby / ZL / 1250 / 0.041
Nichicon / HE / 1250 / 0.041
Chemicon / KY / 1250 / 0.041
.

.
It should have been:
.
Ruby / YXG / 1050 / 0.069
Nichicon / HE / 1050 / 0.069
Chemicon / KY / 1050 / 0.069

Ruby / ZL / 1250 / 0.041

.
- And correcting the summary:

HE, KY, and FK [Panasonic] are equivalent or slightly better than YXG, LZ, and SC.

Ruby ZL, Sanyo WX, Chemicon KZE, and Nichicon HD are ONE step up and would be fine too.
.

Sorry about that...........
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[bshi02]

Re: Is there capacitor layout for NF7-II?

Your explanation is really awesome and fantastic!
Even though I'm not good at English and especially has terribly difficult in writting in English,I comprehend what you really mean in almost all your reply, and I found your Yesterday reply has all of necessary answers for my wonder.
I have posted a ton of question on extremely specialized comp forum in korea,but they always use a lot of technical terms for anwsering and their anwser itself is very ambiguous so in most case I can't figure out WTF they really meanning even those are written in native language :p.

A lot of Korean electronics Junkies believe Samwha and Samyoung is high-grade capacitor manufacturers even if A few doubts about that belief.
I heard Chemicon have invested Samyoung and Nichicon invested Smawha and they did technology transfer deals each Chemicon and Nichicon, because of that They seems to claim their capacitor quality is equivalent to high-grade.

Anyway,I really appreciate your great helpful reply.
and I'll look forward to meet more helpful information in This great badcaps forums.

[PCBONEZ]

Re: Is there capacitor layout for NF7-II?

A lot of Korean electronics Junkies believe Samwha and Samyoung is high-grade capacitor manufacturers even if A few doubts about that belief.
I heard Chemicon have invested Samyoung and Nichicon invested Smawha and they did technology transfer deals each Chemicon and Nichicon, because of that They seems to claim their capacitor quality is equivalent to high-grade.

Nichicon also has a "technology transfer deal" with Taicon.

Unfortunately the "technology transfer deals" are not enough to result in a reliable end product. [Capacitors in this case.]

Here is an analogy:
Company A and Company B both have the same plans [blue prints] and same equipment [tools] to build bridges.
- In other words their 'technology' is exactly the same.
Company A uses high quality materials to build the bridges and the bridges they build last over 100 years.
Company B uses low quality materials to build the bridges and the bridges they build only last 5 to 10 years.

~~~~
~~~~
The following information is based on a study of cap failures done by CALCE at the University of Maryland.
CALCE is a laboratory that does failure analysis.
http://www.calce.umd.edu/

Japanese cap brands use Japanese made Aluminum for their capacitor foil and cans which is very high purity.

Non-Japanese [TW, CH, Kr, etc...] brands usually use Chinese made Aluminum which is less pure than Japanese Aluminum.
It not only has a higher % of impurities, it has different impurities due to different natural trace elements where it is mined.

---- I am NOT saying Chinese made/sourced capacitor Aluminum is low purity. I am saying it as not as a high a purity as Japanese made capacitor Aluminum.

The impurities in the metal slowly leach [chemically leak] into the liquid electrolyte which causes the electrolyte breakdown and fail.

More impurities. = Less reliable.

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There is another related issue.
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Japanese companies are hard core about Quality Assurance.
They test the materials they buy themselves [or even manufacture the materials themselves] to insure it is up to their own standards before they use it.
This results in a consistent end product.
-
Many non-Japanese [TW, CH, Kr, etc...] brands don't test the materials they buy and assume what the vendor they bought from told them is accurate.
They also don't use the same vendors every time.
Tuesdays product run might even have Japanese sourced Aluminum but Wednesdays product run has Chinese sourced Aluminum and Thursdays product run has Chinese sourced from a different Chinese vendor.
- This results in an inconsistent end product.

Inconsistent = Unreliable.

~~~
~~~
No doubt the exact same material quality and consistency issues exist with the chemicals used to manufacture the electrolyte itself.
- But that would be nearly impossible to study...
- WAY too many chemical vendors and the cap companies keep their formulas secret.

~~~
Samwha, Samyoung and Taicon capacitors have high enough failure rates to say they are not up to Japanese standards.
-
They might have the same 'blueprint' and the same 'tools' as their "technology transfer" partner, but they don't always use the same materials.
.

I hope that makes sense through the translation.
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