I have an SMT board with a jumper in the form of a 0 ohm resistor.  I 
need to remove it, but I've never done anything with SMT.  Is there 
anything special that I need to know?  I'm planning on de-soldering it.

Thanks,
Bob

"Bob Engelhardt" <b...@comcast.net> wrote in message 
news:h...@news3.newsguy.com...
>I have an SMT board with a jumper in the form of a 0 ohm resistor.  I need 
>to remove it, but I've never done anything with SMT.  Is there anything 
>special that I need to know?  I'm planning on de-soldering it.
>
> Thanks,
> Bob

Get a fine tipped soldering iron, heat up one side until it melts, then 
quickly heat up the other side. Swap your soldering iron between one side 
and the other and eventually the part will come off

-- 
Bill Naylor
www.electronworks.co.uk
Electronic Kits for Education and Fun 

"Electronworks.co.uk" <n...@electronworks.co.uk> wrote in message 
news:w...@bt.com...
>
> "Bob Engelhardt" <b...@comcast.net> wrote in message 
> news:h...@news3.newsguy.com...
>>I have an SMT board with a jumper in the form of a 0 ohm resistor.  I need 
>>to remove it, but I've never done anything with SMT.  Is there anything 
>>special that I need to know?  I'm planning on de-soldering it.
>>
>> Thanks,
>> Bob
>
> Get a fine tipped soldering iron, heat up one side until it melts, then 
> quickly heat up the other side. Swap your soldering iron between one side 
> and the other and eventually the part will come off
>

Or just use two soldering irons - one in each hand. 

"Electronworks.co.uk" wrote:
> 
> "Bob Engelhardt" <b...@comcast.net> wrote in message
> news:h...@news3.newsguy.com...
> >I have an SMT board with a jumper in the form of a 0 ohm resistor.  I need
> >to remove it, but I've never done anything with SMT.  Is there anything
> >special that I need to know?  I'm planning on de-soldering it.
> >
> > Thanks,
> > Bob
> 
> Get a fine tipped soldering iron, heat up one side until it melts, then
> quickly heat up the other side. Swap your soldering iron between one side
> and the other and eventually the part will come off


   That is a great way to lift pads & traces off a PC board. Use a pair
of irons, and lift the resistor as soon as the solder liquefies on both
sides.  If you have to put it back, a small drop of liquid RMA (Rosin,
Mildly Activated) liquid flux, and the pair of irons will reflow the
solder.  Surface tension will center the ends, so there is no need to
worry about trying to position it exactly. Remove one iron.  As soon as
that end solidifies, remove the other. The rosin will remove any oxides
from the existing solder. it takes longer to write about it, than to do
it.

   I did a lot of this for four years at Microdyne (Now part of L3
Communications) as a production test tech, and engineering tech.


-- 
You can't have a sense of humor, if you have no sense!

Bob Engelhardt wrote:
> I have an SMT board with a jumper in the form of a 0 ohm resistor.  I 
> need to remove it, but I've never done anything with SMT.  Is there 
> anything special that I need to know?  I'm planning on de-soldering it.
> 
> Thanks,
> Bob
  If you're removing this as a permanent function, why not simply
snip the body of it with mini cutters?

Jamie wrote:
> 
> Bob Engelhardt wrote:
> > I have an SMT board with a jumper in the form of a 0 ohm resistor.  I
> > need to remove it, but I've never done anything with SMT.  Is there
> > anything special that I need to know?  I'm planning on de-soldering it.
> >
> > Thanks,
> > Bob
>   If you're removing this as a permanent function, why not simply
> snip the body of it with mini cutters?


   NO!!! That is another great way to damage a PC board.


-- 
You can't have a sense of humor, if you have no sense!

Michael A. Terrell wrote:
> "Electronworks.co.uk" wrote:
>> Get a fine tipped soldering iron, heat up one side until it melts, then
>> quickly heat up the other side. Swap your soldering iron between one side
>> and the other and eventually the part will come off
> 
> 
>    That is a great way to lift pads & traces off a PC board. Use a pair
> of irons, and lift the resistor as soon as the solder liquefies on both
> sides.  

Thank you!  I'm really glad that I asked, 'cause one-iron-back-&-forth 
is what I would have tried.  I'd have been really unhappy with lifted 
pads and/or traces.

> If you have to put it back, a small drop of liquid RMA (Rosin,
> Mildly Activated) liquid flux, and the pair of irons will reflow the
> solder.  Surface tension will center the ends, so there is no need to
> worry about trying to position it exactly. Remove one iron.  As soon as
> that end solidifies, remove the other. The rosin will remove any oxides
> from the existing solder. it takes longer to write about it, than to do
> it.

There's very little chance that I'll be putting it back, but I'll file 
your advice.

>    I did a lot of this for four years at Microdyne (Now part of L3
> Communications) as a production test tech, and engineering tech.

The voice of experience is the best kind.

Thanks again,
Bob

Michael A. Terrell wrote:
> Jamie wrote:
>>   If you're removing this as a permanent function, why not simply
>> snip the body of it with mini cutters?
> 
> 
>    NO!!! That is another great way to damage a PC board.


I had a bad feeling about snipping it, but it was an appealing idea. 
Thanks for confirming my feeling.

Bob

Michael A. Terrell wrote:

> Jamie wrote:
> 
>>Bob Engelhardt wrote:
>>
>>>I have an SMT board with a jumper in the form of a 0 ohm resistor.  I
>>>need to remove it, but I've never done anything with SMT.  Is there
>>>anything special that I need to know?  I'm planning on de-soldering it.
>>>
>>>Thanks,
>>>Bob
>>
>>  If you're removing this as a permanent function, why not simply
>>snip the body of it with mini cutters?
> 
> 
> 
>    NO!!! That is another great way to damage a PC board.
> 
> 
You're such a putz, I've done countless of snips like that removing
jumpers and have never yet damaged anything other than the component
being removed, permanently.

    If you were as experienced as you present your self, you would know
that, how ever, the truth is out there, obviously.

Bob Engelhardt wrote:

> Michael A. Terrell wrote:
> 
>> Jamie wrote:
>>
>>>   If you're removing this as a permanent function, why not simply
>>> snip the body of it with mini cutters?
>>
>>
>>
>>    NO!!! That is another great way to damage a PC board.
> 
> 
> 
> I had a bad feeling about snipping it, but it was an appealing idea. 
> Thanks for confirming my feeling.
> 
> Bob
  Don't get miss lead by those that like to just sit their lard behind
the keyboard and foam at the mouth.

   You do as you wish, but i've done it countless times and have never
had any issues. In fact, for removing components when you don't have the
proper tools using a mini snipper to remove the body first and then 
using a conventional iron and tweezers to remove the leads is a norm.

   But like I said, you have those that just like to sit there and find 
nothing but fault with everything that is posted!. They usually have 
nothing to offer because, that is just the way it is.