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Inleiding

Newer generations of many electronics have batteries that are soldered directly to the logic board. This makes replacing the battery a much harder feat than older models, who use connectors to attach the battery to the logic board. This guide illustrates the various levels of difficulty in soldering, and teaches the technique of soldering three types of connections commonly seen in electronic gadgets:

Step 1: Beginning — Large thru-hole components, such as cylindrical capacitors;

Step 7: Intermediate — Small thru-hole components, such as battery leads and resistors; and

Step 11: Advanced — Small surface-mount components.

  1. To start, let's solder a large component held to a circuit board with thru-hole solder pads.
    • To start, let's solder a large component held to a circuit board with thru-hole solder pads.

    • A capacitor was already removed from the two solder pads. Each pad was heated while the capacitor was pulled away from the board.

    • Notice how the solder holes are completely covered with solder. Opening these holes -- so the capacitor lead can be pushed through -- will greatly simplify installation.

    This is for "Introduction" but didn't see how to comment there.

    Says "newer generations" have soldered batteries but there's no reference as to when this was written so that's not very meaningful. Request clarification.

    Joe - Antwoord

    加熱してハンダが融けたことを確認してから、部品をゆっくり引き上げて外してください。

    n s - Antwoord

  2. To open the hole blocked by solder, heat the solder pad with the tip of a soldering iron. Push through the molten solder from the other side with a staple or sewing needle. In our case, we decided to use a right angle pick. Lead solder will not stick to steel, so pretty much any thin steel can be used.
    • To open the hole blocked by solder, heat the solder pad with the tip of a soldering iron. Push through the molten solder from the other side with a staple or sewing needle.

    • In our case, we decided to use a right angle pick. Lead solder will not stick to steel, so pretty much any thin steel can be used.

    • Pushing the tool all the way through the hole may require heating the pad several times. As a rule of thumb, heat the solder just enough for it to melt, then remove the soldering tip from the pad. Excessive heat will damage electronic components.

    Why not use a simple pump-action desoldering tool which can be obtained cheaply from ebay?

    Chris Jackson - Antwoord

    They are not as easy to use especially for beginners.

    Mike Gross - Antwoord

    Desoldering wire is much better and also much easyier to use for beginners

    Giuseppe R - Antwoord

    ¿plomo? lleva prohibido años, espero que sea estaño. 8(

    Ignacio Bilbao Zenitagoya - Antwoord

    For god’s sake buy a cheap solder sucker. They are trivial to use. This is a tutorial after all. It’s certainly easier to use a solder sucker than to make a clean solder joint.

    Pro tip here - if you are having a hard time taking out solder, USE MORE SOLDER. Yes, it sounds counter-intuitive, but I’ve found that adding a dash of new solder to the troublesome blob you’re working on really helps get out stubborn old solder. Works even better with a solder sucker!

    J. A. Gonzalez - Antwoord

    こういう説明が必要な方は、基板のパターンを壊してしまう前にソルダーサッカーやソルダーウイックを使ってください。

    コテ先の操作だけでホールを修正できるのは手慣れた人だけです。

    n s - Antwoord

  3. When the tool has completely passed through the hole, enlarge the hole by heating the top side of the solder pad while pressing through with the tool. Both solder holes should now be open enough to insert the bare leads of your component.
    • When the tool has completely passed through the hole, enlarge the hole by heating the top side of the solder pad while pressing through with the tool.

    • Both solder holes should now be open enough to insert the bare leads of your component.

    Using a solder sucker will make it a lot safer to the board/copper traces than using a needle or paper clip to clear the hole.

    J. Goodenough - Antwoord

    Yes, please use a solder sucker, or even solder wick.

    If you don’t have some flux laying around, add a tiny bit of new solder if the old solder is being stubborn and not going away. Sounds odd adding more solder to remove solder, but it works!

    J. A. Gonzalez - Antwoord

  4. Prepare your component for soldering by removing any excess solder from the contacts. The contacts should be clean enough to pass through the solder pad holes.
    • Prepare your component for soldering by removing any excess solder from the contacts. The contacts should be clean enough to pass through the solder pad holes.

    • Run the soldering iron tip down the lengths of each contact to wipe the solder away from the component. Clean the iron's tip between strokes by wiping it against a moist sponge.

    • Excessive heat will damage the components, so do not apply the soldering iron to the component for long amounts of time.

    Don’t use a moist sponge if you can avoid it. Water from a moist sponge will get into your tip’s micro-fractures and oxidize it rapidly. I’ve lost many tips to moist sponges.

    Use a cheap solder scour pad instead. They are made of copper, which is soft and will scrub solder away without damaging your tips. If you can’t afford a proper scour pad, make one yourself. Go to the dollar store and buy a copper wire scrubber for like 50 cents. I use the dollar store scrubbers to replace old worn out scour pads.

    J. A. Gonzalez - Antwoord

  5. Insert the contacts into and through the holes made in the solder pads.
    • Insert the contacts into and through the holes made in the solder pads.

    • To ease in soldering, slightly bend the contacts protruding through the holes so they hold themselves in place.

  6. To solder each connection: Place the tip of the soldering iron against the solder pad. Melt just enough solder onto the solder pad so that the capacitor's contact lead holds firmly in place.
    • To solder each connection:

    • Place the tip of the soldering iron against the solder pad.

    • Melt just enough solder onto the solder pad so that the capacitor's contact lead holds firmly in place.

    • Remove both the solder and the soldering iron tip from the connection as soon as enough solder melts onto the pad.

    Using a little electronic soldering paste on both the components leads and board traces will eliminate the need for excessive heat build up, there by making a sound electronic connection.

    J. Goodenough - Antwoord

    Not everyone has soldering paste handy unless they are going to do a lot of soldering.

    Mike Gross - Antwoord

    Solder joint on the left is not good. Solder should be shiny and be shaped like the Atari logo.

    Solder joint on the right is very good, they should all look like that.

    J. A. Gonzalez - Antwoord

  7. Next we will cover a moderately difficult soldering application.  In our case, we will be soldering very thin and delicate leads to a circuit board with small solder pads.
    • Next we will cover a moderately difficult soldering application. In our case, we will be soldering very thin and delicate leads to a circuit board with small solder pads.

    • Small electronic components, including wires, cannot dissipate heat as quickly as larger components. This makes them very susceptible to overheating. Make sure to heat the connection just long enough to melt the solder.

    • The leads were removed from the solder pads by heating the joint on the top side of the board, while pulling out the leads with a pair of tweezers.

  8. It is common for solder to cover up some of the holes through solder pads on the board.  Opening these holes greatly simplifies soldering. Open the holes through the solder pads by pressing a straightened staple against the blockage while heating the same pad from the other side of the board.
    • It is common for solder to cover up some of the holes through solder pads on the board. Opening these holes greatly simplifies soldering.

    • Open the holes through the solder pads by pressing a straightened staple against the blockage while heating the same pad from the other side of the board.

    • A "third hand" tool (or a friend) can greatly help in this procedure.

    Again, if you force any metal object through these holes you increase the chance of damaging circuit board traces on both sides of the board.

    J. Goodenough - Antwoord

  9. After clearing all of the holes, insert the bare ends of the leads with a pair of tweezers. To keep the leads in place, it may be helpful to first bend the battery leads into their final shape, then insert the stripped ends into the holes.
    • After clearing all of the holes, insert the bare ends of the leads with a pair of tweezers.

    • To keep the leads in place, it may be helpful to first bend the battery leads into their final shape, then insert the stripped ends into the holes.

  10. To solder each connection:
    • To solder each connection:

    • Place the tip of the soldering iron against the solder pad.

    • Melt just enough solder onto the solder pad so that the contact leads hold firmly in place.

    • Remove both the solder and the soldering iron tip from the connection as soon as enough solder melts onto the pad.

  11. For the last section, battery leads will be soldered to surface-mount solder pads. These type of joints are harder to solder because the lead has no solid anchor point (such as a thru-hole) to hold it in place during soldering.
    • For the last section, battery leads will be soldered to surface-mount solder pads. These type of joints are harder to solder because the lead has no solid anchor point (such as a thru-hole) to hold it in place during soldering.

    • To de-solder the joint, place a solder wick on top of the existing solder ball and press down on the solder wick with the soldering iron.

    • Once the solder melts and flows into the wick, remove the wick from the joint.

    • Repeat the same procedure on the remaining leads.

    • When a section of solder wick is saturated with solder, it should be trimmed and discarded.

    Könnte heiß werden an den Fingern

    Maik Nousch - Antwoord

  12. We recommend that you clean the surface-mount solder pads with a soft cloth or sponge and a small amount of rubbing alcohol.
    • We recommend that you clean the surface-mount solder pads with a soft cloth or sponge and a small amount of rubbing alcohol.

    • To melt a small bead of solder onto each solder pad:

    • Place the tip of the soldering iron against the solder pad.

    • Melt solder so that it forms a dome on top of the pad.

    • Remove both the solder and the soldering iron tip from the solder pad as soon as enough solder melts onto the pad.

    Using a solder wick requires using too much heat and will damage your surface mount component

    J. Goodenough - Antwoord

    But what do you use instead?

    arno -

    A solder sucker.

    Paul Hudson - Antwoord

  13. The solder bead should look like a small dome or hemisphere. If it is flat or jagged, simply place the soldering iron back on the solder to re-melt it and then pull the soldering iron away. It may require a little more solder if this does not work.
    • The solder bead should look like a small dome or hemisphere. If it is flat or jagged, simply place the soldering iron back on the solder to re-melt it and then pull the soldering iron away. It may require a little more solder if this does not work.

    Better still, apply some flux and touch it with the soldering iron and it will then flow properly.

    Chris Jackson - Antwoord

  14. To solder the new leads to the board, place the bare end of one lead onto the bead of solder on its corresponding solder pad.
    • To solder the new leads to the board, place the bare end of one lead onto the bead of solder on its corresponding solder pad.

    • Press the tip of the soldering iron onto the solder bead until it melts.

    • Slide the exposed end of the lead into the liquid solder until it is in the center of the bead, then remove the soldering iron.

    • Continue with the other connections the same way, taking special care not to solder two of the pads together.

Conclusie

To reassemble your device, follow these instructions in reverse order.

312 andere personen hebben deze handleiding voltooid.

This is a great guide with awesome clarifying pictures.

Thanks!

Martin - Antwoord

TIP: Another method which works well for clearing solder from holes (especially on repairs like AC Jacks on laptops) is to use compressed air to clear melted solder from holes. A quick blast with a duster can works well (I have even used a drink straw in a pinch and blown out with a blast of air from mouth). Heat the solder until it liquefies, put the duster straw right above the solder and quickly hit the melted solder with an air blast to instantly clear the hole of solder. This works well on very small holes as melted solder does not always push out cleanly with metal tools. You have to be quick with the air blast because the solder re-hardens rapidly.

GURUmicro - Antwoord

This is not IPC standards but for the ghetto approach, it will get the job done. I solder in manufacture settings, run my own shop. This is wrong to a degree but will do. If ifixit would like tips from ILLFIXIT then your more then welcome!

Tony Stark - Antwoord

A very good guide to soldering.

I have never soldered anything (I'm a girl you see), but your clear and detailed guidance inspired me to give it a go.

I was well prepared in advance-it could be difficult-and that helped a lot.

I have now got a new battery soldered into my Palm TX and I'm as happy as Larry (or Lorraine in this case)..

geeklynews - Antwoord

Go Gurl! I'm a gurl, too. I worked in my dad's machine shop for 13+ years. I hit the ground running. Programmed, set up, and fixtured, retro-fitted CNC Mills, using SurfCam and G Code programming. We used Master Cam for the wire EDM. My fave was running a standard lathe. I guess I enjoy cylindrical objects. We held tolerances of .005+/- .001, all the way down to .0003+/-.0002. That…is very microscopic. lol

…add to that, Public Relations, Inventory, Inspector, Fixing Crashed tools, Shipping, Document Control, and so on. All I know is, if it needs to be done, it can be done, if your sharp. And, sometimes we gurls, have a different “feel” for delicate or fine work, as compared to some of the guys. There is nothing we cannot do, as well as anyone else, if we want to, and are willing to learn, and practice. I'm ready to try a little delicate connecting, myself.

Happy Trails and Tablets,

PoniGurll, or

DIY Gurll, otherwise, it won't get done!!

cherihashorses -

Using a solder wick braid is a good thing to do every time you are trying to remove solder from the thru-hole and pad. This is because after you use the solder wick you have a clean hole and a clean pad with just a slight film of solder on it and you have a nice open workspace without any old solder in there. Old solder doesn't have solder flux anymore -it's burned off-and won't "flow" around the component or wire leads and leaves an icy-looking "cold" solder joint, a dull grey glob of solder that is weak and doesn't conduct electricity very well. By wicking it off, the new solder, which does have solder flux, will be shiny, smooth, quite strong and conductive. I've been soldering since the early 70's and solder wick is a good friend if you use it right. No need for staples or picks, either.

Clarkness - Antwoord

Also, to help the solder wick pickup the solder faster and to help clean the solder pad at the same time, put just a little flux on the wick before applying the iron to the wick, then wipe the area clean with some alcohol, works great.

C.Vos -

One more thing about having your solder iron on the pads for too long. If you get them too hot the pad will actually separate and lift up off the PC board, tearing the delicate copper trace, and the PC board will be useless.

Clarkness - Antwoord

Perfect Illustrations, Thank you.

semi bariche - Antwoord

I found this to be a clear and easy tutorial on how to solder to remove and install small electrical components. Excellent for beginners and useful for experts in teaching situations.

Allan Ryle - Antwoord

Very good guidance

allwin2abbas - Antwoord

another tip is if you do not have a soldering station and your iron gets too hot just unplug it and continue and never ever dunk your soldering iron in flux if it is excessively hot because it will take the conductive coating off the tip of your soldering iron. also dont dip touch the tip of your iron (while its off) because the oils from your hand can burn through the tip like the flux.

ps: this is from my personal experience and its just some things to look out for

Blair McLeod - Antwoord

Nice job!

Well done,,,,

midatlantic.midatlanticmarine - Antwoord

This is a good job thanks.

Ivette Carlier - Antwoord

Nice post describing PCB Repair soldering with images. It is quite easy to understand also.

Solder Training - Antwoord

What is the best diameter of solder to use on iPod Shuffle batteries? Lead-free? Please be very specific. Thanks much!

plantae13 - Antwoord

Sooo just bought a soldering iron, never used one before in my life, re attaching wires to a little motherboard for a light switch and dimmer, this page literally just taught me exactly what i needed to know and success the first try! Thank so much! finally someone knows they’re stuff instead of me having to go through 30 different pages of nothing on google lol respect dude! keep it up!

mistynoel85 - Antwoord

Great guide! It also helps to use a bit of flux on the points to aid with adhesion of new solder to the contact points, and to help with heat transfer from the solder tip onto the solder pad.

arfan_nazar - Antwoord

I need to solder my wifi it came loose on my insignia tablet. All i need to know is where its located on mother board. Please guide me

Valerie Callahan - Antwoord

Don’t forget to use plenty of flux!

pohlman357 - Antwoord

Really great photographs with excellent descriptions.

I believe any soldering procedure should start with selecting the right wattage soldering iron and tip for the task. Common small wattage soldering irons commonly used to solder small electronics are 15 to 45 Watts.

Second is tinning a new soldering iron tip. Tinning means the first time the tip is heated you melt solder onto the tip until solder sticks to the tip. Even if a tip is factory tinned you’ll want to tin it yourself. Solder needs to stick to a tip to correctly aid in the transfer of heat from the iron to the component.

Another (cheap) way to clean solder off connections is to use a squeeze bulb with a silicone tip. The squeeze bulb creates a vacuum when it is squeezed and the vacuum sucks the melted solder up into the bulb.

Jim Fogle - Antwoord

“Appreciated” Marvellous photos /snaps also nicely & thoroughly explained. Bravo.

BBN - Antwoord

Plug in the soldering iron. Wait for it to heat up… test by tapping solder on to the soldering iron tip. Having ‘tinned’ the soldering tip, apply the tip to the component leg and PCB. If the component leg is comparatively ‘thick’, apply more heat to the leg than the PCB. Tap the solder jointly on the component leg and the iron tip. If the component leg is at the right temperature, the solder will flow and make a sound electrical connection. If the component leg is not at the right temperature, the solder will melt on the iron tip and ‘drip’ onto the component not making a good connection.

I’d never do any soldering without a solder sucker e.g. https://www.amazon.co.uk/Draper-23553-De... but be careful when using it on delicate PCBs as the suck can lift circuit tracks where too much heat has been applied.

Davo - Antwoord

I’m a little late with my comments but just had to brag about my younger days with Heathkits and other companies! I learned how to solder the hard way (without any instructions) and put together a B/W TV, a color TV, an AM/FM receiver and various other little projects. I understand Heathkit is coming back and encourage you younger people to enjoy the hobby of putting together their kits after doing these soldering lessons.

Mike Gross - Antwoord

The girl is so proud of soldering her first new battery into herPalm TX and is probably not interested in retro-fitted CNC Mills and tolerances of .005+/- .001, all the way down to .0003+/-.0002 and so am i….

Thumbs up for geeklynews

arno - Antwoord

Absolutely. I’ve worked alongside women in the US Navy. Most of them are very competent, excellent technicians. Like guys, though, you have your whiners and slackers. We are all the same.

Paul Hudson - Antwoord

Some information in the top title area was misleading, as the iPod isn’t sold anymore (except for the touch with a soldered battery) and the iPhone has had a socketed battery since 2008. I fixed it in the latest unverified version.

DistroHopper39F - Antwoord

Hello, thanks for this tutorial what kind of soldering wire, especially regarding the diameter, would you advise to use?

Bonjour, thanks for this tutoriel. Quel diamètre de fil à soudure préconiseriez-vous ?

Da Moun - Antwoord

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