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Step 8
At this point the audio connections are soldered
to the board. Use the Ohm meter to find the audio plug wire that is soldered
to the center conductor (the tip end of the audio plug). The center conductor
of the audio plug is connected to the point marked 1 in the illustration
which is hole C2 and the ground connection
of the audio plug is connected to the point marked 2, which is hole H2.
With all of the components installed, all that
is left is to connect the circuit to the DB-25 female connector.
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