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| New board has a huge grounding
wire connected to the oscillator. Also, the oscillator is lifted off of
the main board with a plastic spacer. These changes seem to be related to
EMI (electro magnetic interference) issues. There is a motor located
directly beneath the board that is suspect. This also explains why the
oscillator was lifted up higher from the noise source. |
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| A metal shield has been added
beneath the oscillator. It also happens to be right above the motor. The
oscillator is a very sensitive circuit that provides a clock source for
the voice processing chip. Any clock glitches created by interface from
the motor could cause the voice chip to operate improperly. |
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| Original voice recognition board
for reference. |