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4. TROUBLE SHOOTING
To U103
(AD6521)
The audio signal from the mic of the HFK to U103(AD6521)
This part is same with that of the ear-mic.
Refer to the page 1 of the complete circuit diagram for detail.
U204 selects the path of audio
signal for the ear-mic or the HFK.
Refer to the page 2 of the complete circuit diagram
for detail.
- 94 -
The direction of the audio
signal from the mic of the HFK
The signal flow when
the HFK is activated.
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