Steve,
If the problem is that you just don't want to change out the MAX1406,
there are 2 unused TX/RX sections in the implementation in the KIO2.
You just need to cut the traces to the in and out pins used and wire to
another pair of pins.
OTOH, just replacing the MAX1406 may be just as easy.
73,
Don W3FPR
On 6/9/2019 12:11 PM, inventor61 . wrote:
My K2 #771 has a KIO2 that has no serial data output.
This appears to be due to a problem ... in the other direction.
I can see my inbound ASCII commands (e.g., FA;) at pin 6 of U1 on the KIO2
board.
However, the MAX1406 shows only rail at the corresponding TTL side.
I presume the MAX1406 has popped ...
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