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Factory Service Manual
       Page 1 to 24
       Page 25 to 61

Diagrams
       Block Diagram
  Stage 1
       Main Schematic
       Main Schematic (11x17)
  Stage 2
       Main Schematic
       Main Schematic (11x17)
  Stage 3
       Main Schematic
       Main Schematic (11x17)
  Stage 4
       Main Schematic
       Main Schematic (11x17)

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