GE Cardiocap 5 Service Manual

Measurement Parameters 
 
Figure 6-25. Signal processing 
 
Figure 6-26. Control logic 
 
Figure 6-27. Calibration data stored in EEPROM 
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Cardiocap/5 Technical Reference Manual 
6.7 NMT components 
6.7.1 NMT board 
The NMT circuit board consists of the following functional sections: 
• Constant current stimulator. 
• Measuring electronics for the EMG signals. 
• Microprocessor for stimulation and measurement control, and for counting measurement results. 
• Serial communication. 
The serial bus speed is 500 kbps and the bus itself is half duplex (data can be transferred in both 
directions but only one way at a time). 
Serial...

Measurement Parameters 
6.7.2 Front panel connector (NMT) 
   
NMT connector Pin No. Signal 
 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
EMG signal + 
EMG signal – 
Not used 
Stimulus + 
Stimulus – 
Ground 
Not connected 
Sensor identification 
+5 V 
Mechanical signal 
6.7.3 Module bus connector 
 
   
Pin No. I/O Signal 
1 I RESET_RS485 
2 I –15 VDC 
3 I +15 VDIRTY 
4 I +15 VDC 
5 I/O –DATA_RS485 
6 I/O DATA_RS485 
7 – Ground & Shield 
8 I –RESET_RS485 
9 I CTSB 
10 O RTSB 
11 I RXDB 
12 O TXDB 
13 – Ground &...

Cardiocap/5 Technical Reference Manual 
 
 
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Contents 
Chapter 7. Service Procedures  
7.1 General service information..................................................7-1 
7.2 Monitor software installation................................................7-1 
“Cold start” instructions........................................................................\
.....7-1 
“Warm start” instructions........................................................................\
...7-1 
7.3 Replacement...

Cardiocap/5 Technical Reference Manual 
Oxygen measuring (OM) unit ..................................................................... 7-14 
TPX measurin g unit ........................................................................\
.......... 7-14 
PVX measurin g unit........................................................................\
.......... 7-14 
Gas unit CPU  board........................................................................\
.......... 7-14 
7.4.7 Gas sampling system  leak...

Service Procedures 
7. SERVICE PROCEDURES 
7.1 General service information 
Field service of the Cardiocap/5 monitor is limited to replacing faulty circuit boards, mechanical parts, 
or a real-time clock battery. Some boards may be returned to GE Healthcare for exchange. 
For service advice from GE Healthcare, please provide the unit serial number, full type designation, 
and a detailed fault description.  
CAUTION: Only trained personnel with the appropriate tools and equipment shall perform the tests...

Cardiocap/5 Technical Reference Manual 
7.3 Replacement procedures 
NOTE:  Reassembly is essentially the reverse of disassembly. When reassembling the unit, make sure 
that the cables and tubes, if any, are not pinched between the boards. 
Tools 
• Screwdriver (pozidrive) 
• Hexagon driver (3.0 mm) 
• Pliers 
• Cable tie 
7.3.1 Disassembling the frame assembly 
1. Remove the 4 hexagon and 13 pozidrive screws that hold the back cover. 
2. To pull the front-cover unit apart from the inner-parts unit,...

Service Procedures 
7.3.3 ECG, NIBP, and STP board replacement 
The NESTPR unit must be removed before you can replace the ECG, NIBP, or STP boards. 
NESTPR unit removal 
You may separate the display from the frame to gain better access to the NESTPR unit, but it is not 
necessary. To remove the unit without separating the display: 
1. Disconnect the 5 patient-connector cables from the front panel. 
Important: For reassembly, note the connection of temperature cable T1 (black wires) and, for 
monitors...

Cardiocap/5 Technical Reference Manual 
7.3.5 Gas unit CPU board, pump, and fan replacement 
The airway gas unit must be removed before you can replace the gas unit CPU board, the pump, or the 
fan. 
Airway-gas unit removal 
1. Move the backplate unit out of the way to access the airway gas unit (see Backplate unit removal). 
2. Unfasten the 3 screws and washers that hold the locking chock and remove the chock. 
3. If installed, disconnect the hook-and-loop strap. 
4. Disconnect the 2 tubes from the...