> -----Oorspronkelijk bericht-----
> Van: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]namens Reginald Neale
> Verzonden: woensdag 28 juli 1999 23:19
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: Re: oops...now what do i do?
>
>
> >
> >With solder sucker:
> >    Cock the solder sucker. Heat a pin and put nozzle of sucker
> >near but not on pin. Fire. Go around to other pins. Now put
> screwdriver
> >under socket and pry gently, while rewarming pins with brief
> touches from
> >iron. Should be able to work the pins free and socket up
> away from board.
> >
> >With wick:
> >   Same as solder sucker, but you 'blot up' the solder with the wick.
> >
> >For all of them - Don't get in a hurry. Let the board cool in-between
> >melting solder points, or you'll lift the traces.
> >
>
>
>   One other tip, especially for double-sided/multilayer
>   boards: after you get the solder out of the hole but before
>   attempting to remove the socket, take a needle-nose pliers
>   and grip each pin tightly one at a time. Wiggle them
>   around strenuously in all directions to break the remaining
>   film of solder between the pin and the hole/pad. This will
>   minimize the possibility that you rip out the plating
>   as you lift the socket. If you're skillful (and lucky) when
>   you break loose the last pin, the socket will drop out.
>
>   As an earlier poster mentioned, the most idiot-proof
>   method is to destroy the socket and heat one pin at
>   a time to remove it while the solder is molten.
>
>   Reg Neale
>   Destroyer of many boards, salvagor of a few
>

When a pad is heated, the glue (epoxy) melts. When you apply any force to
the pad, it gets loose from the glue and is lost.

My receipt:

- Suck all the solder away with a vacuum pump powered solder sucker.
- Heat only the pin in the hole of the solder sucker and loosen it by moving
the pin around.
- Pins in double sided PCB's loose better with a blowing solder sucker (use
the other side of the vacuum pump).
- Let the PCB cool down, then remove the component. Force does not ruin the
cold PCB.

Leo van Loon
SBB simpeltronics
Netherlands
tel +31 (0481) 450034
fax +31 (0481) 450051
mail sbb.simpeltron@tip.nl
url http://www.sbb-simpeltronics.nl
SBB simpeltronics ontwikkelt technische projecten voor basisschool en
basisvorming.
SBB simpeltronics develops technical projects for children in primary and
secondary education.