Hints on desoldering Crystal Oscillator on A3640?

[jbenam]

Hello mateys,

does any of you have advice on how to desolder these stubborn DIL-14 oscillators?

I want to desolder the one on my A3640, to no avail.

I've already tried hot air, but the only thing that I obtained was that the board became soft, but the oscillator didn't move an inch

My soldering iron can obviously heat only one pin at a time, so I'm out of ideas

Thanks!

EDIT: I also tried with desoldering braid, but it doesn't suck any solder

 

[supaduper]

you say you have tried braid have you tried a vacuum solder sucker ? works for me

 

[jbenam]

you say you have tried braid have you tried a vacuum solder sucker ? works for me

You mean this?

I tried it, the solder just cools down before I can suck it

 

[supaduper]

yes that will work,,some are better than others, or try chip quik its a special solder that stays in a molten state giving you time to remove the component.
Also make sure you solder iron tip is not worn and able to reach the melting temp of the solder ,simple rules but sometimes the tools are the problem

 

[AppleIIGuy]

One of these work great

 

[jvdbossc]

I first put some solder on the iron, then some extra solder on the melted joint, then it should work with classic pump.. I've got one of those that appleIIguy mentions, but mileage varies, depending on board, and it really smells.. Like parts out of my technics cd player are very good removable with the pump cobo, but it doesn't work for my C64...

 

[jbenam]

yes that will work,,some are better than others, or try chip quik its a special solder that stays in a molten state giving you time to remove the component.
Also make sure you solder iron tip is not worn and able to reach the melting temp of the solder ,simple rules but sometimes the tools are the problem

I've got this station:

Paid it a nice amount and it works like a charm Changed the tip just two months ago.

Sadly I can't find any ChipQuik around here. I guess I must order it only online, and with the shipping costs it doesn't sound a good option :nuts:

*image*
One of these work great

Don't take me for a n00b

I first put some solder on the iron, then some extra solder on the melted joint, then it should work with classic pump.. I've got one of those that appleIIguy mentions, but mileage varies, depending on board, and it really smells.. Like parts out of my technics cd player are very good removable with the pump cobo, but it doesn't work for my C64...

Well, I guess I'll try again with the pump...

 

[57Chevy]

I hold the pump in my left hand and the iron in my right with the pump tip a mm from the connection, as soon as it liquifies I release the pump.

I found that the sharp end of a safety pin when heated by the iron can help push the leg thru the hole.

You can try to clip off the oscillator amd work from the other side.

Finally you could by a nice desoldering station by CSI for some $ similar to your soldering device.

[I saw were the Euro price was listed above, is it OK? Or is it Price Driving?]

 

[jbenam]

[I saw were the Euro price was listed above, is it OK? Or is it Price Driving?]

Well, we're not selling soldering stations here, so I guess it's fine? I guess mods will clear stuff up if it's not right


Sadly I can't work from the other side as the oscillator doesn't have any space beneath it, so no space to cut the pins at all.

I actually had a desoldering gun (the one with a pump in it), but it worked like crap so I resold it.

I'll try your advice, thanks!

 

[jvdbossc]

I hold the pump in my left hand and the iron in my right with the pump tip a mm from the connection, as soon as it liquifies I release the pump.

I found that the sharp end of a safety pin when heated by the iron can help push the leg thru the hole.

You can try to clip off the oscillator amd work from the other side.

Finally you could by a nice desoldering station by CSI for some $ similar to your soldering device.

[I saw were the Euro price was listed above, is it OK? Or is it Price Driving?]

You can link to buy it now items on ebay, but I would not comment on prices, since the rules say price discussions are not allowed, so it's best to avoid them.

Therefore I alway's put some links, without mentioning prices. (always buy it now on)

But I understand you are trying to help

 

[jbenam]

You can link to buy it now items on ebay, but I would not comment on prices, since the rules say price discussions are not allowed, so it's best to avoid them.

Therefore I alway's put some links, without mentioning prices. (always buy it now on)

But I understand you are trying to help

You're right, so I removed the price

Listing the price was just to show that it wasn't one of those el-cheapo chinese soldering iron which won't melt solder for crap! :ROTFLOL2:

EDIT: Well, the problem was that the solder was old as heck. A bit of solder flux and everything was alright! Oh right, I also got some copperwire, tinned it, and used it to heat two points at time, to avoid damaging the oscillator.

I hope this will come in handy to someone!

 

[bebek]

Always add a new solder to old joint before soldering and melt it together. You will see a huge difference . Do not be scared that there is more solder to suck .

 

[jbenam]

Always add a new solder to old joint before soldering and melt it together. You will see a huge difference . Do not be scared that there is more solder to suck .

I had already tried that, I always do that everytime I desolder something

Didn't help in this case Old solder can be quite stubborn, it seems :huh:

 

[roy_bates]

are you using flux paste as well? it makes life alot easier

 

[bebek]

Always add a new solder to old joint before soldering and melt it together. You will see a huge difference . Do not be scared that there is more solder to suck .

I had already tried that, I always do that everytime I desolder something

Didn't help in this case Old solder can be quite stubborn, it seems :huh:

Itis only solder, you have to be more stubborn . Sometimes it is difficult to melt when caps leaked on it. Good you have it out. Never use heat gun in case like this as first you will de-laminate PCB and at best it will look awful

 

[jbenam]

Itis only solder, you have to be more stubborn . Sometimes it is difficult to melt when caps leaked on it. Good you have it out. Never use heat gun in case like this as first you will de-laminate PCB and at best it will look awful

Yes, it also smells quite a lot when the caps have leaked on the solder

Luckily I used it only for a small bit!

are you using flux paste as well? it makes life alot easier:smile:

That was what saved my life I could finally remove it using flux paste.

 

[ShambleS1980]

use thicker braid and add some flux.

Edit: Note to self check for a page 2 before posting.

 

[darkage]

+1 for flux.. It's pretty much a must and the missing element that alot of ppl forget..

When you add flux then the joint can reflow again quite easily.. Easy enough for the solder stucker to suck it up..

I use a flux pen.

Dab some on the joint, then melt with solder quickly sucking it up with the sucker tool. Do this until there is minimal amount of solder left on joints. Once its all sucked up it should break free with minimal effort.

Bigger solder suckers are good as well for more sucking power

Desoldering wick is the best, but it does take alot of practise and not as easy as the sucker method for newbies.

Hope this helps

http://www.youtube.com/watch?v=j-_pnc-Qqm8

 

[roy_bates]

i dont use flux pens much,i would rather use the paste as it stays where its put.

i just paint it on with a brush.

besides flux paste transfers heat to the joint really well,pens have a tendancy to run down the pcb there ok for reflows and such i suppose.

 

[jbenam]

Desoldering wick is the best, but it does take alot of practise and not as easy as the sucker method for newbies.

Not a newbie luckily I don't find that desoldering wick works as good as it should on small soldering points.
I use it a lot when working on bigger stuff and for cleaning excess solder, though.

I refuse using flux because I can ONLY find corrosive flux around here. Cleaning it is a pain, so I tend to avoid it lately, to the point that I even forgot having it!

@darkage
Yep, I'm going to buy a bigger pump today