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Factory Service Manual
       Page 1 to 29
       Page 31 to 59

Diagrams
       Model 2702
       Block Diagram
       2702 Schematic
       2702 Schematic

       Model 2703
       Block Diagram
       2703 Schematic
       2703 Schematic

Mic Wiring

Stock

1 - Audio In (mic)
2 - Transmit
3 - Shield  (ground)
4 - Audio Out
5 - Receive

Astatic
1 - White
2 - Red
3 - Shield & Blue
4 - NC
5 - Black
     Yellow NC