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SpO
Printed Circuit Board
2
User Interface Printed Circuit Board
O
M
N-65 Service Manual
XI
AX
The SpO
PCB provides patient interface and monitor operating power.
2
Patient Interface
The patient interface receives signals from the O
converted and supplied to the user interface PCB central processing unit (CPU).
The patient interface receives control signals from the CPU. These control signals
are used to control the light emitting diodes in the O
Power Supply
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
Power Monitoring
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 monitor via the keypad
•
Patient %SpO
and pulse rate via the display
2
•
Monitor 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
XI
power monitoring function provides the user
2
patient interface with status information on the power
Technical Discussion
M
sensor. These signal are
AX
M
sensor.
XI
AX
PCB and the user
2
85
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