
MAXON SM-2000  MOBILE
VOLTAGE CHARTS 
IC109
PIN  | 1  | 2  | 3  | 4  | 5  | 6  | 7  | 8  | 
BUSY  | 7  | OSC  | 6  | 7.2  | 6  | 6  | 6  | 7.2  | 
RX (MUTE)  | 7  | OSC  | 6  | 7.2  | 6  | 6  | 6  | 7.2  | 
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PIN  | 9  | 10  | 11  | 12  | 13  | 14  | 15  | 16  | 
BUSY  | AUDIO  | 0.8  | NOISE  | 2.5  | 7  | 4.5  | GND  | 2  | 
RX (MUTE)  | AUDIO  | 0.8  | NOISE  | 0  | 7  | 0  | GND  | 2  | 
IC101
PIN  | 1  | 2  | 3  | 4  | 5  | 6  | 7  | 8  | 
RX VOLTAGE  | 0  | 5  | 5  | 5  | 5  | PD  | GND  | 0  | 
TX VOLTAGE  | 
  | 2.5  | 5  | 5  | 5  | 0  | 0  | 2  | 
PIN  | 9  | 10  | 11  | 12  | 13  | 14  | 15  | 16  | 
RX VOLTAGE  | 5  | 2  | 2.7  | 5  | 3.5  | 5  | 0  | 0  | 
TX VOLTAGE  | 2.7  | 3  | 2.7  | 5  | 3.5  | 5  | 0  | 0  | 
PIN  | 17  | 18  | 19  | 20  | 
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RX VOLTAGE  | 5  | 0  | 0  | OSC  | 
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TX VOLTAGE  | 5  | 0  | 0  | 2.3  | 
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TRANSISTOR VOLTAGE CHART
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  | RX  | 
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  | TX  | 
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REF.NO  | B  | C  | E  | B  | C  | E  | 
Q108  | 7.5  | 3.5  | GND  | 0  | 3.5  | GND  | 
Q113  | 0.7  | 2.5  | 1.5  | 0.7  | 2.5  | 1.3  | 
Q114  | 3.1  | 5  | 2.3  | 3.1  | 5  | 2.3  | 
Q116  | 0  | 0  | 0  | 2  | 7  | 1.2  | 
Q117  | 0  | 0  | 0  | 0.7  | 7.2  | GND  | 
Q125  | 12  | 13.72  | 13.7  | 12  | 12.5  | 13.2  | 
Q106  | 7  | 2.5  | GND  | 1  | 1.5  | GND  | 
Q140  | 0  | 7.5  | GND  | 5  | 0  | GND  | 
Q130  | 0.7  | 5  | 0  | 0  | 2.5  | 0  | 
Q122  | 8  | 0  | 8  | 7.3  | 8  | 8  | 
Q121  | 0  | 8.1  | 0  | 5  | 0  | GND  | 
Q127  | 5  | 0  | GND  | 
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Q128  | 0  | 8  | 8  | 
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Q120  | 0  | 13.8  | GND  | 0  | 13.8  | GND  | 
Q118  | 0  | 9.5  | GND  | 0  | 6  | GND  | 
Q139  | 7.5  | 0  | 8  | 0  | 8  | 8  | 
December 98