#: 13699 S1/General Interest
    26-Dec-91  21:53:43
Sb: #13673-#Dead CoCo3
Fm: Paul Rinear 73757,1413
To: Erich Schulman 75140,3175 (X)

    In my experience; forget about saving the 6809 that is in the COCO3 if
you're going to replace. I believe RS still sells a desoldering iron with a
sucker bulb built onto it. This is a BEST BUY desoldering iron. It has a little
hollow tip that heats up and sucks up solder.
    With this, it is possible to desolder the 6809; but don't try it. Chances
are the board will be damaged and the chip will have suffered from heat too.
    Cut the pins off the old 6809 with a very small pair of diagonal cutting
pliers or tiny scissors. Then with a pair of needlenose pliers grab each pin
and pull it from the board while heating its solder pad from the other side.
You might need a small clamp vise to hold the board, I use my feet.
    Some of the holes will still have solder in them, but you can BLOW this out
with that DE-soldering iron. Just heat the solder pod and squeeze the bulb
quickly.
    After you have clear holes, carefully solder in a socket with RS's smallest
iron (the blue one with the pin tip).
    It's really not that hard.
    How many 4164's do you need? This place is crawling with them.

                                    Paul

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