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is it possible to fix a video card with missing resistor? - Page 3

post #21 of 38
Quote:
Originally Posted by philhalo66;12846894 
so it would be much easier to find the correct type then?

The answer is NO. It's harder. Resistors are easier to identify since they have a number written on top of them.

You're gonna need the actual schematic diagram for that PCB to get the actual value of that ceramic capacitor.
Edited by _s3v3n_ - 3/23/11 at 8:55pm
post #22 of 38
Resistors only require a measurement from even the cheapest meters.

Quote:
How can I measure/determine the value of a SMD capacitor?

"If it's a good capacitor, you could measure it with a capacitance meter.

Or you could build a little oscilator with it and an inductor of known value and measure the frequency. Or you could use a function generator and a resistor and an oscilloscope to measure it. All depends on what tools you have available."
Quoted from google.
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post #23 of 38
Thread Starter 
Quote:
Originally Posted by Tw34k View Post
Resistors only require a measurement from even the cheapest meters.


Quoted from google.
i think ill just hold off lol way too complicated. ill just wait till tax returns and buy a 5850
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post #24 of 38
1.) I'm pretty sure you don't have to remove a resistor to measure it. (I could be wrong, I've had a bit of whiskey so the electronic engineer part of my brain might not be working right).

2.) Good point! Surface mount resistor and surface mount capacitors are IDENTICAL in size/shape/color. The only difference is the markings.

3.) OMG YOU DO NOT NEED A FUNCTION GENERATOR OR A OSCILLOSCOPE! Second of all, i'm pretty sure the guy who started this posted does not have the skill set to measure the discharge time of a capacitor..... when capacitor is charged with a pulse by a function generator and measured via oscilloscope. Only a electronic engineer would be able to follow what you are talking about. Tw34K, I take it you are a electronic engineer as well? I am. X-D
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post #25 of 38
Quote:
Originally Posted by crimsontears809739 View Post
1.) I'm pretty sure you don't have to remove a resistor to measure it. (I could be wrong, I've had a bit of whiskey so the electronic engineer part of my brain might not be working right).

To get an accurate measurement yes you do.

2.) Good point! Surface mount resistor and surface mount capacitors are IDENTICAL in size/shape/color. The only difference is the markings.

3.) OMG YOU DO NOT NEED A FUNCTION GENERATOR OR A OSCILLOSCOPE! Second of all, i'm pretty sure the guy who started this posted does not have the skill set to measure the discharge time of a capacitor..... when capacitor is charged with a pulse by a function generator and measured via oscilloscope. Only a electronic engineer would be able to follow what you are talking about. Tw34K, I take it you are a electronic engineer as well? I am. X-D
EE currently? sadly no, not yet at least. But electronics has been my main hobby since before I hit double digits in age. I grant you that most people will not own an oscilloscope or even know what one is for that matter but it doesn't mean they should be withheld information on the proper methods of measurement.

These credit worthy at all?








Edited by Tw34k - 3/23/11 at 9:42pm
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post #26 of 38
Why aren't you a EE? You practically have a EE lab at your disposal. The $20-$30 dollars an hour you get paid as a EE is not bad either. What do you work as?


sorry for getting so off topic. lol

EDIT: That a probally $5,000+ DSO in the background? Is that your personal oscilloscope?
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post #27 of 38
Quote:
Originally Posted by crimsontears809739 View Post
Why aren't you a EE? You practically have a EE lab at your disposal. The $20-$30 dollars an hour you get paid as a EE is not bad either. What do you work as?


sorry for getting so off topic. lol

EDIT: That a probally $5,000+ DSO in the background? Is that your personal oscilloscope?
Yes that is my lil garage lab but I must admit the scope is a sub $1000 hobbyist model, its a 50MHz Rigol that is popular for being able to easily be hacked into a 100MHz unit with a simple firmware hack through a serial cable.

Im just a unemployed, anti-social, 23 year old with some college who cant figure out what he wants to do with his life but thats a whole other story.
Edited by Tw34k - 3/24/11 at 2:23pm
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post #28 of 38
Back on topic for a bit though, I'm curious as to where exactly this missing cap is on the pcb, some macro shots as well as a normal clear overall shot would be greatly beneficial to helping figure out first of all the purpose of this cap (filtering, decoupling, ect) and secondly the value.

Hopefully someone with GPU modding expertise might chime in and help shed some light on the subject but I have a hunch that if we can determine the capacitors pcb part number (for example C134) we might be able to track down a schematic and find the value that way.

Op: Do you see on the pcb where the missing cap is a letter C followed by a number?
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post #29 of 38
1 - Find the resistance in ohms
2 - find another of the same type
3 - Buy it.
4 - solder it on
5 - ???
6 - PROFIT
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post #30 of 38
Quote:
Originally Posted by Tw34k View Post
Yes that is my lil garage lab but I must admit the scope is a sub $1000 hobbyist model, its a 50MHz Rigol that is popular for being able to easily be hacked into a 100MHz unit with a simple firmware hack through a serial cable.

Im just a unemployed, anti-social, 23 year old with some college who cant figure out what he wants to do with his life but thats a whole other story.
Rigol DS1052E? Looking into getting one of those myself.
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