Removing through hole chip

coinopjunkie

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Has anyone tried using hot air to remove a normal through hole chip? I know they are made for surface mount chips. I just bought a hakko 852 and was wondering how it would work or should I still buy 472D or something like that? I want to be able to professionally remove through hole chips.
 
Not good. Difficult to melt the solder on the middle layers of multilayer boards. Easy to cook the chips if you're trying to salvage them.

You're better off getting a desoldering iron and leaving the hot air to removing SMT chips.
 
Can I ask

Can I ask what you use? Any that you would buy instead? I'm willing to spend decent money (400-600)if it works good. I know a lot of people use some cheap stuff and are happy but I do believe to a certain point you get what you pay for.
 
It's pretty hard to remove a chip you want to save without burning the board. I use my rework on thru-hole but cut the chip out first. I alternate heating the legs on the top and bottom of the board and pull the legs out with pliers once they start to lean. Very fast and pretty much no chance of pulling a trace.
 
I can't though

It's pretty hard to remove a chip you want to save without burning the board. I use my rework on thru-hole but cut the chip out first. I alternate heating the legs on the top and bottom of the board and pull the legs out with pliers once they start to lean. Very fast and pretty much no chance of pulling a trace.

I'm trying to remove the battery backed ram from silent scope can't cut the chip. I would get acid everywhere plus you can't even see the legs to cut.

That is how I usually remove chips but this forced me to buy new equipment.
 
I'm trying to remove the battery backed ram from silent scope can't cut the chip. I would get acid everywhere plus you can't even see the legs to cut.

That is how I usually remove chips but this forced me to buy new equipment.

My friend uses chip quick with his rework on these type of jobs and has had success. I burned my board pretty bad the first time I practiced using my rework to remove an uncut IC so use caution. I've also had chips easily fall out on their own with my rework.
 
I've standardized on Pace equipment. Get you a nice MBT250 and I'll show you the irons and tips you want to get to go with it to do surface mount stuff.

If you keep a good eye on eBay you can pick 'em up affordably.
 
200 to 600 depending on the # of irons and accessories.
 
Has anyone tried using hot air to remove a normal through hole chip? I know they are made for surface mount chips. I just bought a hakko 852 and was wondering how it would work or should I still buy 472D or something like that? I want to be able to professionally remove through hole chips.
I own a 473 and truly hate it. I've given it several attempts, most recently in December when I serviced it with brand-new filters for higher airflow. It just doesn't remove the solder as well as a hand-pump and I peeled 2 traces out of 6 eprom sockets that I removed. Ultimately the damage was my fault for using too much force too early, but I get better results with other tools.

I don't use hot air for this kind of stuff. Most of the time you're dealing with several pins and the board sinks away enough heat that the solder re-hardens before you can do anything. Worth a try but for this stuff direct heating with the tip of an iron is my preference.
 
really

Wow I was convinced hakko was the way to go an hour ago especially talking to others with the cheap 808 that love it.
I own a 473 and truly hate it. I've given it several attempts, most recently in December when I serviced it with brand-new filters for higher airflow. It just doesn't remove the solder as well as a hand-pump and I peeled 2 traces out of 6 eprom sockets that I removed. Ultimately the damage was my fault for using too much force too early, but I get better results with other tools.

I don't use hot air for this kind of stuff. Most of the time you're dealing with several pins and the board sinks away enough heat that the solder re-hardens before you can do anything. Worth a try but for this stuff direct heating with the tip of an iron is my preference.
 
This handpiece is used to remove quad flat packs:

http://www.ebay.com/itm/PACE-6680-D...445?pt=LH_DefaultDomain_0&hash=item2a13df43e5

It requires different tips for the different sizes of packages to remove. It uses the suction from the desoldering pump to lift the chip up after the iron portion melts the solder.

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This one is for removing SOICs, SOJs, and PLCCs:

http://www.ebay.com/itm/PACE-TT-65-...253?pt=LH_DefaultDomain_0&hash=item5ae48ae805

Similar to the other iron it requires different tips for the different size packages you wish to remove.

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I use the SX-70 desoldering irons. These are the filters to use for those:

http://www.ebay.com/itm/Pace-desold...Home_Garden_PowerTools_SM&hash=item20c1fb09ea

But you can buy 'em cheaper in bigger quantites elsewhere. You go through more of the small ones than the big ones. The small ones go into the glass tube... the bigger ones are removable filters that go inline in the suction tube right before it plugs into the station.
 
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For irons, make sure they are the sensa-tip type. They have 5 pins in the plug vs 3 and the extra 2 are for a temperature sensor inside the heating element so it provides constant heat even when soldering something to a large copper surface.

There are two types of heaters for soldering and desoldering irons. Get the ones with the larger holes which use tips that are longer lasting. You can get adapters to use the smaller tips in the desoldering irons so you can use the cheap Plato tips but they sure don't last long.

You also want a set of tip cleaners. I think you can still get them at Home Depot. They are wire pieces in a holder that are commonly used to clear out wire welders when they jam.

Don't use sponge cleaners on the tips. It shocks them thermally and causes microfractures that leads to early failure. Use the cleaners that look like brillo pads.
 
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