Table of Contents
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Power Supply
Power Monitoring
User Interface Printed Circuit Board
NPB-40
The power supply provides operating voltages to the SpO
interface PCB. These voltages are supplied to the:
•
SpO
PCB power monitoring function
2
•
SpO
PCB circuits
2
•
user interface PCB power supply
•
user interface PCB CPU
•
user interface PCB audio circuits
The SpO
power monitoring function monitors and controls the outputs of the
2
SpO
power supply. The SpO
2
interface CPU and SpO
2
supply output signals.
The user interface PCB provides:
•
User setup of the NPB-40 via the keypad
•
Patient %SpO2 and pulse rate via the display
•
NPB-40 status via the display and audio function
•
Printed reports via the IrDA (Infrared Data Association) and external
printer
•
Display readability in dark environments via the display backlight
•
Operating voltages for the user interface circuits
•
Operating voltage monitoring
power monitoring function provides the user
2
patient interface with status information on the power
Technical Discussion
PCB and the user
2
79
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Troubleshooting
