Service manual

Table of Contents
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LIST OF FIGURES
Figure 1-1: NPB-190 Front Panel.................................................................. 1-2
Figure 1-2: NPB-190 Rear Panel .................................................................. 1-2
Figure 3-1: NPB-190 Controls....................................................................... 3-2
Figure 3-2: Self-Test Display......................................................................... 3-3
Figure 3-3: Adjusting High %SpO2 Alarm Limit ............................................ 3-3
Figure 3-4: Adjusting Low %SpO2 Alarm Limit............................................. 3-4
Figure 3-5: Adjusting High Heart Rate Alarm Limit ....................................... 3-4
Figure 3-6: Adjusting Low Heart Rate Alarm Limit ........................................ 3-4
Figure 3-7: Alarm Silence Duration ............................................................... 3-6
Figure 3-8: Alarm Volume Display ................................................................ 3-7
Figure 4-1: NPB-190 Controls....................................................................... 4-1
Figure 6-1: Fuse Removal............................................................................. 6-2
Figure 6-2: NPB-190 Corner Screws ............................................................ 6-3
Figure 6-3: Separating Case Halves ............................................................. 6-4
Figure 6-4: Battery Removal ......................................................................... 6-5
Figure 6-5: Power Entry Module.................................................................... 6-6
Figure 6-6: Power Supply Leads Connections .............................................. 6-7
Figure 6-7: Power Supply.............................................................................. 6-8
Figure 6-8: Display PCB................................................................................ 6-9
Figure 6-9: UIF PCB...................................................................................... 6-10
Figure 6-10: Alarm Speaker.......................................................................... 6-12
Figure 7-1: NPB-190 Exploded View............................................................. 7-2
Figure 8-1: Repacking the NPB-190 ............................................................. 8-2
Figure A-1: Serial Port Pin Layout................................................................. A-2
Figure A-2: Real-Time Printout ..................................................................... A-2
Figure S-1: Oxyhemoglobin Dissociation Curve ........................................... S-2
Figure S-2: NPB-190 Functional Block Diagram........................................... S-3
Figure S-3 Front End Red/IR Schematic Diagram....................................... S-11
Figure S-4 Front End LED Drive Schematic Diagram.................................. S-13
Figure S-5 Front End Output Schematic Diagram ....................................... S-15
Figure S-6 Front End Power Supply Schematic Diagram ............................ S-17
Figure S-7 Isolation Barrier EIA-232 Port Schematic Diagram .................... S-19
Figure S-8 CPU Core Schematic Diagram .................................................. S-21
Figure S-9 PIC and Speaker Schematic Diagram ....................................... S-23
Figure S-10 Indicator Drive Schematic Diagram.......................................... S-25
Figure S-11 Core Power Supply Schematic Diagram .................................. S-27
Figure S-12 Parts Locator Diagram for UIF PCB......................................... S-29
Figure S-13 Display PCB Schematic Diagram............................................. S-31
Figure S-14 Parts Locator Diagram for Display PCB ................................... S-33
Figure S-15 Power Supply Schematic Diagram ........................................... S-35
Figure S-16 Parts Locator Diagram for Power Supply PCB......................... S-37