2030434-006 Rev. E EasyOne-CS Field Service Manual Page 6
5.3 Block Diagram
The following picture shows the functional block diagram of the EasyOne-CS Spirometer.
Microcontroller
M16C62
Real Time
Clock (RTC)
Serial Data
Flash
Graphic LC
Display
Flow Sensor
ASIC
Power
Management
Buzzer
Keypad
ON/OFF
EZ1-BlockDiagram.sdr
Screen
Connector
PC (USB)
5.4 Printed Circuit board
All electrical components of EasyOne-CS are mounted on a single PCB.
With the exception of the lithium battery no components can be serviced.
The following two pictures show a top and bottom view of the PCB.
Figure 7: Bottom view of EasyOne-CS PCB
The lithium battery located on the top right of the PCB has an approximate life time of 5 to 10 years. In
early revisions of the hardware the lithium battery is soldered on the board.
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