Check Transistors and FETS in circuit for shorts or opens using a DVM ohm meter

[CocaCola]

Are you deliberately ignoring us?

It's hardly the first time he has done this, he has the tendency to flip roles on a dime, from the totally ignorant and clueless student to the 'thinks' he knows it all teacher that in reality still doesn't have a clue...

 

[danny davis]

I can't find any videos on youtube how to desolder a SMT transistor or FET

Do you guys know any videos?

 

[CocaCola]

Same way you unsolder any IC...What package?

 

[danny davis]

They are just normal SMT SMD transistor and FETS sizes
The Transistors and FETS all look the same
They are square with 2 pins on one side
And a middle pin on the other side
In the size of an 805 resistor

The problem I'm having is how do you desolder a transistor

Do you use wick?

Because I tried using Desoldering Tweezers and It didn't work because the middle pin doesn't line up with the other 2 pins and and Tweezers soldering tip is not wide enough to heat the pads of the 2 pins either

So it there a special soldering TIP ? that will desolder SMT transistors?

 

[CocaCola]

They are just normal SMT SMD transistor and FETS sizes
The Transistors and FETS all look the same
They are square with 2 pins on one side
And a middle pin on the other side
In the size of an 805 resistor

Wow, you don't even have a grasp of the most basic component packages yet?

The problem I'm having is how do you desolder a transistor

That is the least of your problems...

Do you use wick?

We went over the use of wick weeks ago and you clearly didn't even grasp the most basics of it, go back and re-read said thread until you understand what wick is used for...

Because I tried using Desoldering Tweezers and It didn't work because the middle pin doesn't line up with the other 2 pins and and Tweezers soldering tip is not wide enough to heat the pads of the 2 pins either

Did a light bulb go off in your head that suggested that maybe that isn't the tool for the job?

So it there a special soldering TIP ? that will desolder SMT transistors?

You don't need a special tip, SOT-23 chips are easy cheesy to remove with just an iron and your everyday tip...

 

[danny davis]

But how do u desolder a SOT-23 chips?

If i'm using my soldering iron on the middle pin if i lift it up the pin with the soldering iron?

 

[CocaCola]

But how do u desolder a SOT-23 chips?

Is that the chip package you have?

There is no single one way to remove it, but here is a video I just made, just for you of how to remove it with a soldering iron... Ignore the production quality as it was taken with my phone balanced on cardboard box, on the fly...

I generally prefer using hot air, but for quick and dirty the iron works just fine...

http://www.innermatrix.net/f_uploads/sot_23.mp4

 

[danny davis]

Ya i know mostly i use a hot air gun, but this job im' at they want u to use the soldering iron and I don't know how to do it

I tried looking on youtube and i can't find anything on desoldering SMT transistors and FETS

 

[danny davis]

Yes that is the transistor size SOT-23 for FETS and transistors

Yes I don't know about that toggling back and forth with the soldering iron

I have done that before with resistors and caps also , but now i use desoldering tweezers

but at all last jobs we have hot air guns to do everything

 

[CocaCola]

Ya i know mostly i use a hot air gun, but this job im' at they want u to use the soldering iron and I don't know how to do it

I tried looking on youtube and i can't find anything on desoldering SMT transistors and FETS

FOR THE LOVE OF ALL THINGS SILLY, look at the post above yours!!!

 

[CocaCola]

Yes I don't know about that toggling back and forth with the soldering iron

 

[(*steve*)]

Gee, my answer is "with hot air"

Point the rework tool at it and wait the couple of seconds until you see the solder go all shiny.

Then reach in with the tweezers and lift it off.

Then take the rework tool away.

Sure, you can use a soldering iron too. I find hot air easier (some people say I'm full of it )

 

[davenn]

I find hot air easier (some people say I'm full of it )

----- awwww steve now who would say something like that

and Dang cocacola, I thought that younger pic of me had been deleted from the net!!

haha

D

 

[(*steve*)]

http://www.innermatrix.net/f_uploads/sot_23.mp4

Nice.

(I'm a bit behind in my replies this morning)

 

[danny davis]

No, They have a Soldering Tip that is special for SOC-23 size components

They looks like a 2 finger folk

 

[(*steve*)]

No, They have a Soldering Tip that is special for SOC-23 size components

They looks like a 2 finger folk

Fork perhaps? Anyway, it sounds like your problem is solved. Congratulations.

 

[CocaCola]

No, They have a Soldering Tip that is special for SOC-23 size components

They looks like a 2 finger folk

So do you have one on your iron? Do you own such a tip at all? If so why are you asking how to remove the part? There are 1001 gadgets and gimmick tools out there that serve a single purpose or try to fill a void, doesn't mean it's the ideal or efficient way all the time...

If you had a job removing SOT-23 packages all day and night a special iron might be perfect... But, if you have to let your existing iron cool down, swap the tip, heat up, take part off, let cool down, swap tip, let heat up you are wasting time as I would have had the part off with the iron in hand before your iron even cooled down...

Gee, my answer is "with hot air"

It's a toss up for me, if the iron is on and in my hand there is no need to pull a switch up as it can be done in not time with the tool in hand... If I was doing a bunch of SMD rework the hot air would certainly be fired up and being used, but for one offs I find the iron just as convenient...

 

[CocaCola]

Nice.

(I'm a bit behind in my replies this morning)

Thanks, production value was basement level, but it gets the point across...