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- fixing a motherboard
- toms tools
- motherboard capacitors
- replacing capacitors on motherboard
- removing capacitors from a motherboard
- motherboard capacitor replacement
- fixing motherboards
- solder capacitor motherboard
- motherboard capacitor
- replace capacitors on motherboard
- soldering capacitors on motherboard
- removing soldered capacitors
- how do you remove capacitors from motherboards
- soldering motherboard tools
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Appropriate Tools
This is a processor-controlled soldering/de-soldering station.
Before we start, note that you must conduct all further steps at your own risk. We recommend this task only for users who have had experience using soldering tools. Tom's Hardware assumes no liability for any damage to the motherboard, the capacitors or you.
Professional de-soldering tools are essential for soldering work. Neither manual soldering irons nor de-soldering pumps are suitable, since heating and removing the soldering tin has to take place in a single process. Otherwise, the soldering tin will solidify immediately. The motherboard itself absorbs a lot of heat, which makes de-soldering difficult.
Your de-soldering tools' soldering tip should be 0.8-1.0 mm in diameter, so the soldering tin can easily be sucked away from the soldered spot. In our lab, we used a rather old processor-controlled soldering/de-soldering station called the PLE-9001. Another manufacturer of professional level soldering/de-soldering tools is ERSA.
De-soldering iron with electronic suction pump
In addition, we need solder and electronic diagonal cutting pliers. The latter is smaller than a normal side cutter and is therefore handier for delicate work. A small bench vise with plastic chucks is also helpful to hold the motherboard in a vertical position while soldering. Make sure you attach the vise at an appropriate location and do not pull it too tight.
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Recognizing of broken capacitors is not so simple in some cases.
Sometimes (very often in my case) have capacitor its nominal capacity but it has high serial current. When you connect DC voltage of capacitor nominal value and capacitor have some serial current throught it, then it is broken. Only charging current is allowed (short current peak on connect).
Sorry for my english.
Good article. I have personally made this repair sucessfully many times using only a basic hand held solding iron and hand held desolder pump.
Like you say the motherboard sinks away the heat fast. You need an iron with between 70 and 100 watts and a large flat tip. If it spans both solder points of the cap its really easy
Just heat and gently pull the cap out from the other side of the board. Then clear the holes with the heated pin method or use a desolder pump. If you heat the hole on one side and use the pump on the other side it should clear easily.
Only other thing to note is. Be QUICK, practice on some junk board first, you dont want to burn a big hole in your board or lift of the tracks.
Im sure most people don't have a professional solder/desolder station. These cost at least $160 usually more.
Another trick. Assuming the old caps are dead and of no further use. Pull them off thier leads.
If you pull a electrolytic capacitor hard the leads will pull straight out of the body of the cap.
Leaving just the leads sticking up. Its now much easier to remove becuase you can desolder the leads and remove them one at a time.