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Step 4) Desolder the Voice board CPU (IC29) and fit the supplied 64 pin Daughter Board.
It is very important that this step is done correctly.
On the top side of the voice board underneath the IC29 CPU are some fine tracks that will be damaged and difficult to repair if all the solder is not
removed correctly (see photo).
All the solder must be removed from all the 64 holes and the pins free of the hole edges
before the CPU is lifted.
All the CPU pins should be able to move freely in the holes which shows that they are not still soldered to the hole
sides. The best way to achieve this is with a good vacuum desoldering tool. A combination of a quality Solderwick and a hand vacuum can be used
but you will need to take care as these can cause damage to the board as they can jump and damage tracks as they are triggered. Copper is very
soft at 300+ degrees and is easily lifted from the surface especially on these older boards. If tracks are damaged they will need to be repaired
before proceeding.
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Kiwi-106 Upgrade User Manual v204