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Function Description Savina Version 2.0
The Front Panel PCB contains the 7-segment displays for the pre-set ventilation parameters, the
drivers for the key LEDs, the drivers for interpretation of the keys and the shaft encoder
voltage generator for backlighting of the display. The voltage generation for the backlighting can
switched on and off from the Control PCB.
Block diagram of the Front Panel PCB
+5 V
+5 V
AC
DC
Control
PCB
7-segment displays
operating
status
LEDs
key
LEDs
control
knob
backlighting
display
keys
Front Panel PCB
power
pack
drivers
drivers
drivers
drivers
loudspeaker