Spacelabs Healthcare elance 5, Service Manual

Page: 17 / 94

Theory
Contents
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
External Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Interconnection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Boot Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
System Architecture
- Patients ECG, RESP input signal is acquired, amplified and processed by the “ECG ACQ” ATMEL ATMEGA162V
microcontroller. This part is electrically isolated from the other circuitry.
-
Patient Invasive BP, Temperature and SpO
2
input signal is acquired, amplified and processed by the “Acquire” ATMEL
ATMEGA162V microcontroller. This part is electrically isolated from the other circuitry.
-
Patient Non-Invasive BP and CO
2
input signal is acquired and processed by the AMTEL “Press” ATMEGA640
microcontroller.
- Monitor program is stored and run from the Zbitsy Board.
- Z-Bitsy processor Board processes the data from I/O connectors and internal compact flash card.
-
The nurse alert output is controlled by the ATMEGA640 microcontroller.
-
The main speaker is controlled by the Zbitsy Board. The second speaker is controlled by the ATMEGA640
microcontroller.
- Strip Chart Recorder is connected to the monitor externally. Signal send via a buffer to the processor board.
- Display signal is sent from the Z-bitsy to the LVDS driver board. The signal from the LVDS is subsequently sent to the
LCD display. LCD backlight is controlled by the ATMEGA640 microcontroller.
-
AC power cord is connected directly to the monitor via an AC input module. The internal power supply gen5v
and +14v for the boards and also responsible for charging the internal Lithium battery.
3-1
SpO
2
BP1
BP2
T1
T2
BACK
LIGHT
ISOLATOR
BUFFER
NIBP
PUMP / VALVE
ORIDION
MINIMEDI CO2
“Acquire”
ATMEL
ATMEGA162V
MICROCONTROLLER
CO2
EXH
LCD DISPLAY
NIBP
UART
SECOND
SPEAKER
BUFFER
COMPACT
FLASH CARD
MAIN
SPEAKER
“Press”
ATMEL
ATMEGA640
MICROCONTROLLER
“Z-Bitsy”
BITSY-X
PROCESSOR BOARD
TOUCH SCREEN
ETHERNET
USB
MONITOR BLOCK DIAGRAM
EXTERNAL
STRIP
CHART
RECORDER
BATTERY
POWER
SUPPLY
AC INPUT
MODULE
AC INPUT
+14V
+5V
ALARM OUT
PATIENT ISOLATED
FRONT END
“ECG ACQ”
ATMEL
ATMEGA162V
MICROCONTROLLER
ECG
RESP
PATIENT ISOLATED
FRONT END
I
S
O
L
A
T
O
R