Transport DC Voltages Development and Distribution



-20VDC Purpose, development and distribution



1. Used for:



   a. Operating bias oscillator unit manual changeover switch.



   b. Lighting the safe light.



   c. Lighting fail light, sounding buzzer and initiating transport 

      changeover when fail condition occurs.



   d. Resetting transport after fail condition has occurred.



2. Full wave rectifier CR2/CR5 develops -20VDC, C7 filters it.



3. Routed from CR2 anode to TS1 pin 3



4. TS1 pin 3 to:



   a. TS1 pin 5 on Transport #1 to:



      1. RY-9 pin 9 to light safe light.



      2. RY-12 pins 6 and 8 for transport changeover when fail 

         condition occurs.



   b. Bias oscillator unit #2 pin 10.



      1. Pin 10 makes with Pin 12 when manual changeover switch is 

         pressed, routing 115VAC to power bias unit selected.



   c. Reset switch SW203 for transport #1