Greetings. While working on an RC-85, the cw (and courtesy tones) suddenly 
quit. Repeat audio and speech still work. Input lines to the DAC chip appear to 
wiggle in a fashion that suggests they are working - the correct cw is 
recognizable on the O'scope but nothing appears at the DAC output. 

Anyone been here and fixed it? New DAC?

Thanks for the bandwidth. 
Mike/W5JR

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