GE Corometrics 250cx Series Service Manual

Revision C 250cx Series Maternal/Fetal Monitor 2-21
2036947-001
Equipment Overview: Theory of Operation
US1
US2
UA
FECG
MECG
MS
p
o2
FSpo2
FRONT-END MOTHERBOARD 13542
Front-end 13544
Isolated Power
Supply Bd
DSP/FRONT PANEL INTERFACE BD
Mux
+
A/D
DSP Processing
System
Dual Port Ram
To Main CPU
Dual US
FECG MECG
UA +
Isolated
Mode
Control/Status
Data Bus
Video dual Port Ram
Video Timin
g
Generator
Output
Latch
LCD Panel
Dis
p
la
y
320 X 240
Video/Control
MAIN BD/NBP
68302
Processing
System
4 Channel Audio
Volume Controls +
Mux
Amp
RS232
Interface
(Quad UART)
Options Interface to:
1) DSP Bd 2) Comm Bd
Recorder
Interface
RECORDER BD.
Motor Driver
Paper Out/Low
Detection Circuitry
Recorder Head
Power supply
Recorder head
strobes and data
buffers
Recorder
Head
Motor
UA
To main Bd through DSP Bd
Real Time
Clock
A
C INPUT
14085
11867
Comm BD
J102 HR, UA +
mode DACs
Status Line
Outputs, US
Audio
Keypad receive
data port
Keypad control + Status port
Telemetry receive
Mode line status port
UA, MECG, FECG
US Audio + Timer audio
US AUDIO from US Bd
to DSP BD
Dual Ultrasound Bd
13692
Comm
Line
Opto
Isolators
MSpO2 Module Bd
Universal
Fspo2 Module Bd
FM401 - 330036
FECG/UA Bd
MECG
Daughter Bd
(
O
p
tional
)
MODE + STATUS INPUTS
Opto Sensors
+20v
Converter &
color encoder
Bd
Panel
Brightness
Control
Inverter
MSpo2 ID
R/W
Buffer
Telemetry receive
HR & UA
to Main BD
SYSTEM POWER
SUPPLY
+
5,
+12
,
+1
5,
-1
5,
+2
0
Micro Controller
MSP430F133
Backlight
LEDs
Trim
Knob
Photo
Sensor
Backlight
LEDs
UI Board
RS-232
Serial Link
NBP
Subs
y
stem
Serial Link
FPGA
Fspo2
Conn Bd
Mspo2
Conn Bd
Serial Link to Ox
Serial Link
Main Bd Data Bus
Buffers
ID Tag R/w lines
R/W
Buffer
Main Bd Option Data Bus
Main Bd Option Data Bus
Front Panel Main
Buttons
DSP Data Bus
Volume
Buttons
Chart Li
g
ht LEDs
3 RS232 Channels
+20v, +5v
Pump, Valves & Filter
Oximeter Carrier

GE Corometrics 250cx Series Specifications

General

Type	Fetal Monitor
Model	250cx Series
Manufacturer	GE Healthcare
Fetal Heart Rate Monitoring	Yes
Ultrasound Frequency	1 MHz
Recorder Speed	1, 2, 3 cm/min
Maternal Parameters	ECG, NIBP, SpO2
FHR Range	30-240 bpm
TOCO Range	0-100
Connectivity	RS-232
Power Source	AC Power
Display	Color LCD