Mallinckrodt NELLCOR NPB-4000 Service Manual page 5

14.11 Knob Interface Control ........................................................... 14-17
14.12 Push Button Control ............................................................... 14-17
14.13 Miscellaneous Control - CS5#................................................ 14-17
14.14 Speaker .................................................................................. 14-20
14.15 NIBP (Non Invasive Blood Pressure) Control......................... 14-20
14.16 Front End Interface................................................................. 14-24
14.17 Digital Schematic.................................................................... 14-26
14.18 Block Diagram........................................................................ 14-37
14.19 Current Drain of Digital Electronics ........................................ 14-39
Section 15: Power Supply - Theory of Operation..................................... 15-1
15.1 Overview .................................................................................. 15-1
15.2 AC Mains Flyback Power Supply ............................................. 15-3
15.3 Battery Charger ........................................................................ 15-5
15.4 Buck Converter Operation........................................................ 15-5
15.5 Power Devices ......................................................................... 15-6
15.6 Miscellaneous Control .............................................................. 15-7
15.7 System Power Supply .............................................................. 15-7
15.8 Mains (AC) Led Operation........................................................ 15-8
15.9 Power Supply Control Logic ..................................................... 15-9
15.10 Alarm Section ......................................................................... 15-10
15.11 NIBP Pump Control ................................................................ 15-10
15.12 Safety Devices ....................................................................... 15-10
Section 16: MP-205 Service Manual (Npb P/N: 044540A-0296).............. 16-1
16.1 Overview .................................................................................. 16-1
16.2 Module Descripton ................................................................... 16-1
16.3 Circuit Description .................................................................... 16-2
16.4 Interconnections ....................................................................... 16-2
16.5 Sensor Interconnect ................................................................. 16-2
16.6 Oxichip Circuit .......................................................................... 16-2
16.7 Preamp..................................................................................... 16-3
16.8 Programmable Gain Amplifier (PGA), Demodulator and
Demultiplexer ........................................................................... 16-3
16.9 Filters and Level Shifter............................................................ 16-3
16.10 LED Driver.............................................................................. 16-4
16.11 Reset Schmitt Trigger ............................................................ 16-4
16.12 High Resolution A/D Converter .............................................. 16-4
16.13 Input Filter .............................................................................. 16-4
16.14 Power Decoupling .................................................................. 16-5
16.15 Status and Timing .................................................................. 16-5
16.16 Analog Power Regulation ....................................................... 16-5
16.17 Microcontroller........................................................................ 16-5
16.18 Troubleshooting The MP-205................................................. 16-7
16.19 Packing for Shipment ............................................................. 16-13
16.20 MP205 Specifications............................................................. 16-14
Section 17: Drawings ................................................................................. 17-1
17.1 Overview .................................................................................. 17-1
17.2 List of Figures........................................................................... 17-1
Contents
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