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Gigabyte GA-P35-DQ6 - capacitors' problem!

post #1 of 7
Thread Starter 
Hi guys,
yesterday, when I was trying to remove the video card from my old PC, I broke two capacitors.
Can anyone tell me what kind of capacitors are these, and maybe if there is some site where I can buy some, to try and repair my MB.
I'm living in Italy and I fond some site, but there are a lot of different types, with different parameters.

this is a pic from the motherboard, there is a group of three capacitors on the left of the PCI-E slot, two of them are not there any more.
400
400

The capacitors are like 6mm diameter and 7mm height, I can't measure it precisely. There is a label on top of them (in case you can't see it in the pics) - E73C / 100 / 16v
400

Thanks.
post #2 of 7
I'm a electronics engineer, i think i can help!

The number one place electronics companies buy their parts from is Digi-key.com. I am pretty sure they ship to Italy. (If they can'tt, tell me and i will help you work something out.)


The "16V" is for 16VDC. The "100" is for "100uF" The "73C" is the maximum temperature. The "E" means "E-series". The mounting technique is "surface mount". The type of capacitor is "aluminum dielectric".

As part of my job i find parts for electronics companies all the time, but this one has me stumped. I can't find any "E" series capacitors. Well, I'm working from my lunch break, and lunch is over. I will dig some more after work. Maybe with the info i gave you, you can dig up something?

I promise you i'll eventually find your part.
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post #3 of 7
Both capacitors had the same writing i assume?

I'm fairly certain it's a NP-CAP PXE Series. It's a low ESR solid wound cap. That would mean it's rated to 105C (which makes sense). The 73C has nothing to do with temperature, not sure about the exact meaning of the 73C.

I feel fairly confident that this is a correct match, or close enough in ripple current capacity/ESR/tolerance where is should work fine. The description the data sheet reads "Suitable for DC-DC converters, voltage regulators and decoupling applications used on computer motherboards etc". I assume both those caps are for a voltage regulator?

http://search.digikey.com/us/en/products/APXE160ARA101MF80G/565-3210-1-ND/1826750

Get out a micrometer and make sure it fits the pad!!! Look at the size code box in the data sheet. Let me know if it doesn't.

Sorry, wish i could be more help. I have done a lot of parts replacements, just this one has proved tricky to find.
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post #4 of 7
Thread Starter 
I've found some components, much similar to the original (based on your info about it's parameters), but the one you've found seems better.
So, I'll try to buy some of these capacitors and we'll see what will happen.

At first I was thinking to buy some broken P35-DQ6 motherboard and take the capacitors, but that proved to be difficult.

Thanks for your help, mate, much appreciated.
I'll post to inform you about the results of all these efforts smile.gif
post #5 of 7
Not sure what your background is on electronics, so I'll give you a few pointers!


1.) Those motherboards use lead-free solder. Lead free solder is difficult to use, you often risk over-heating. My advise: Solder you new capacitors on with leaded solder. It's easier to use, and melts at the lower temp. It won't hurt anything. Before you apply leaded solder, remove the old lead free solder. Use a "solder wick" or "solder braid" to remove the old solder. Use rubbing alcohol to remove any flux. Apply a little bit of leaded solder to the motherboard before you add your part.

2.) Start with your soldering iron on the lower setting and/or the fine tip, and slowly work your way up. The plastic on the base of those capacitors melts really easily. If you use too much heat, your ruin your capacitors or accidentally un-solder other parts of the motherboard..

3.) You know capacitors explode if you put them in backwards right? At least the wet electrolytic capacitors did. Either way, double check your polarity. The polarity has to be correct.

Good luck!
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post #6 of 7
Quote:
Originally Posted by crimsontears809739 View Post

3.) You know capacitors explode if you put them in backwards right? At least the wet electrolytic capacitors did. Either way, double check your polarity. The polarity has to be correct.
Good luck!

Be careful with exploding solid caps. The top of the capacitor can fly away like a bullet if it explodes.
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post #7 of 7
Thread Starter 
Just wanted to say that I've repaired the mb a few days ago. I found capacitors similar to the ones suggested by crimsontears809739, and following the advices you gave me, had no problem to solder them. So far everything works well. I'm gifting the old PC to my cousin, I hope his house didn't catch on fire, because of my two left hands tongue.gif
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