Ac Mains Flyback Power Supply - Mallinckrodt NELLCOR NPB-4000 Service Manual

Section 15: Drawings

15.2 AC MAINS FLYBACK POWER SUPPLY

15-2
Figure 15-1: Power Supply Block Diagram
Control logic on the power supply assembly is responsible for several
system functions:
• AC and DC charging LED drivers
• System ON/OFF control from the front panel membrane
switch
• Early Warning OFF notification to the processor board
• OFF on command from the processor board
• Alarm driver based on processor fault (watch dog time-out)
• Alarm Silence from front panel
• NIBP Pump control from logic levels
• Battery Voltage transmittal to the processor board
Figure 15-2: Power Supply Detail Diagram