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If something is turning brown, it probably means you are holding the iron to the board too long. What wattage is your iron, and how long are you holding it to the board when you try to solder or desolder something? If it takes longer than a few seconds, then you need to lift the iron off the board ...

..other electronics. I've had some experience with a soldering iron and I'm getting used to using the de-soldering vacuum but I had a few questions:

1. After using the soldering iron on some old broken clock chips part of the chip looked brown as if it had been burned or overheated. Would that ...