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Thread: Tips and hints for de soldering SMD leds

  1. #1
    Regular Member Jonsey's Avatar
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    Default Tips and hints for de soldering SMD leds

    Hello

    I am after some tips and hints for desoldering SMD leds as I just tried one of the door switch ones and it was a proper pain to get off as can only do one side at a time, I ended up tearing the track off the positive side but ended up working once I soldered the new led on. Saying that I was using my cheepo 15w iron. Will be getting a proper thermostat regulated soldering station when I do it on a bigger scale.

    Regards

    Dave


    Sent from my iPhone using Tapatalk

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    Regular Member Ben50n's Avatar
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    You need a de-soldering tool!

    http://www.ebay.co.uk/sch/items/__de...=228459_228459

    Its a vacuum sucker, warm the sodler up on one side, use the de-solderer, then do the other side.

    Simples!

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    Regular Member Ben50n's Avatar
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    Doh, double post!

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    Regular Member Jonsey's Avatar
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    Yep got one of them, didnt do much to be honest.


    Sent from my iPhone using Tapatalk

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    Regular Member Ben50n's Avatar
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    It should have sucked the solder straight off! Are you using a small tipped soldering iron? It concentrates the heat into a small point, some of the generqal purpose ones have too large a head.

    http://www.ebay.co.uk/itm/40w-Solder...item20ba431409

    Smething like this will give you pinpoint heat.

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    Regular Member rushy's Avatar
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    The door ones are glues in as well, there the only ones that are a pain, the rest are only held on with solder.

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    Regular Member Jonsey's Avatar
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    Yeah is a fine point tip will be buying one of these at weekend will get better control.

    http://mobile.maplin.co.uk/module.aspx?moduleno=219133


    Sent from my iPhone using Tapatalk

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    Regular Member BYGino's Avatar
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    You're actually better not to use a desoldering tool for SMD, desoldering tools were really designed for PTH technology. That said, they will work a bit.

    There's 3 ways to remove SMDs:

    1) Use solder braid to remove the solder - this doesn't alway get all of the solder though.
    2) Apply more solder to each side of the device and heat up both sides - don't hold too long on one side though and keep alternating until both sides are fluid enough to remove the device.
    3) Use a hot air gun (special solder ones though, not the big heavy ones because they blow too hard and end up blowing devices all over the place) this is really for QFP etc though and complete overkill for a couple of diodes.

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    Regular Member Jonsey's Avatar
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    Well after watching videos on youtube, I decided to put that knowledge to the test this evening. So I changed the leds in the 4 heater buttons, changed the red and blue on heater temp and changed the drivers door lock/unlock to red and it was alot easier to say the least. Im just waiting for the white leds to arrive so I can started on them.





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    Last edited by Jonsey; 16th February 2012 at 20:10.

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    Regular Member luke4487's Avatar
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    Patience and a decent soldering iron.... my first attempt trashed my driver door switch after 'ripping' off some of the LED's with my LIDL HUGE chisel tipped soldering iron.... haha talk about the wrong tool for the job!

    Got them all done in the end though and Kman did the tiny ones in the CD70 and the clocks

    My advice... start on the smallest switches as they are the cheapest to replace if they go wrong lol

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