Mains stage has main switch for main supply, relay controller that activates standby outputs when main source switched on, relay switch connecting second rectifier-smoother to power source

摘要

The circuit has a first rectifier-smoother device (111,112) that produces a d.c. voltage from the input power, a standby voltage source (52) supplied with the d.c. voltage and supplying numerous outputs, a second rectifier-smoother (48), a main voltage supply (50) that converts the output of the second rectifier-smoother into the desired output d.c. voltage, a main switch (54) for switching on the main supply, a relay controller that activates the standby outputs when the main source is switched on and a relay switch (46) activated by the relay controller to connect the second rectifier smoother to the a.c. power source.