GE S5 Service Manual

							Introduction
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                                          Document no. M1031517-02
IPX class:
IPX0
IPX1
IPX2
IPX3
IPX4
IPX7
IPX8Degree of protection against harmful ingress of water as detailed in the 
IEC 60529:
- Ordinary equipment
- Protection against vertically falling water drops.
- Protection against vertically falling water drops when enclosure tilted up to 15 °.
- Protected against spraying water.
- Protected against splashing water.
- Protected against the effects of temporary immersion in water.
- Protected against the effects of continuous immersion in water.
This symbol indicates that the waste of electrical and electronic equipment must not 
be disposed as unsorted municipal waste and must be collected separately. Please 
contact an authorized representative of the manufacturer for information concerning 
the decommissioning of your equipment.
Ethernet connector 
						

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Document no. M1031517-02                                                                           
1.2 Safety 
The following list contains general warnings and cautions you should know before installing, 
maintaining or servicing the system. Warnings and cautions specific to the use of the system can be 
found in the User’s Guide and User’s Reference Manual.
1.2.1 Safety precautions
Warnings
WARNINGA WARNING indicates a situation in which the user or the patient may be in 
danger of injury or death.
Power connection
•
Use only hospital-grade grounded power outlets and power cord. Do not remove the grounding 
pin from the power plug. 
•Use only an intact power cord. Replace the power cord if it is cracked, frayed, broken or 
otherwise damaged.
•Do not apply tension to the power cord otherwise the cord may get damaged.
•Do not use extension cords or adapters of any type.
•Before starting to use the system, ensure that the whole combination complies with the 
international standard IEC 60601-1-1 and with the requirements of the local authorities. Do 
not connect any external devices to the system other than those specified.
•If the integrity of the external protective earth conductor arrangement is in doubt, use the 
monitor with battery operation.
•To avoid the risk of electric shock, this equipment must only be connected to a supply mains 
with protective earth.
•Do not use an additional multiple socket outlet or extension cord.
Installation
•
Keep the monitor horizontal when the Compact Airway Module is used. Tilting the monitor may 
cause erroneous results in the Compact Airway Module’s readings and damage the module. 
•The monitor or its components should not be used adjacent to or stacked with other equipment. 
If adjacent or stacked use is necessary, the monitor and its components should be observed to 
verify normal operation in the configuration in which it will be used.
•Pins of connectors identified with the ESD warning symbol should not be touched. Connections 
should not be made to these connectors unless ESD precautionary procedures are used. For 
details, see section “1.2.2. ESD precautionary procedures”
•After transferring or reinstalling the monitor, always check that it is properly connected and all 
par ts are securely attached. Pay special attention to this in case of stacked mounting.
•Never install the monitor so that it is above the patient.
•A printer or computer must be supplied from an additional transformer providing at least basic 
isolation (isolating or separating transformer).
•If you accidentally drop the monitor, modules or frames, have them checked by authorized 
service personnel prior to clinical use.  
						

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                                          Document no. M1031517-02
Laser radiation
•
When using the ARK Barcode Reader, N-SCAN, do not stare into the beam. The N-SCAN is a 
Class 2 laser product.
External connection
•
Do not connect any external devices to the monitor other than those specified.
Fuse replacement
•
Replace a fuse only with one of the same type and rating.
Explosion hazard
•
Do not use the monitor in the presence of flammable anesthetics.
Patient safety
•
Do not perform any testing or maintenance on the monitor while it is being used on a patient.
•PACEMAKER PATIENTS: The impedance respiration measurement may cause rate changes in 
Minute Ventilation Rate Responsive Pacemakers. In this case, set the pacemaker rate 
responsive mode off or turn the monitor impedance respiration measurement off.
•Never install the monitor so that it is above the patient.
•The monitor must not be used without manufacturer approved mounting attached.
•Operation of the monitor outside the specified values may cause inaccurate results. 
Cleaning and service
•
Only trained personnel with proper tools and test equipment should perform the tests and 
repairs described in this manual. Unauthorized service may void the monitor warranty.
•Turn the power off and unplug the power cord before cleaning or service. Completely remove 
any moisture before reconnecting the power cord to the mains outlet.
•Do not touch any exposed wire or conductive surface while any cover is removed and the 
monitor is energized. The voltages present can cause injury or death.
•Pins of connectors identified with the ESD warning symbol should not be touched. Connections 
should not be made to these connectors unless ESD precautionary procedures are used. For 
details, see section “1.2.2. ESD precautionary procedures”.
•Always perform an electrical safety check and a leakage current test on the monitor after 
service.
Accessories
•
Use only accessories, including mounts and batteries, and defibrillator-proof cables and 
invasive pressure transducers approved by GE Healthcare. For a list of approved supplies and 
accessories, see the “Supplies and Accessories” catalog delivered with the monitor. Other 
cables, batteries, transducers and accessories may cause a safety hazard, damage the 
equipment or the system, result in increased emissions or decreased immunity of the 
equipment or system or interfere with the measurement. Protection against cardiac defibrillator 
discharge is due in part to the accessories for pulse oximetry (SpO2), temperature (T) and 
invasive pressure (P) measurement.  
						

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Document no. M1031517-02                                                                           
•Single use accessories are not designed to be reused. Reuse may cause a risk of contamination 
and/or affect the measurement accuracy.
Cautions
CAUTION A CAUTION indicates a condition that may lead to equipment damage or malfunction.
Installation
•
Leave space for air circulation to prevent the monitor from overheating.
•Before connecting the power cord to the power supply, check that the local voltage and 
frequency correspond with the rating stated on the device plate.
Before use
•
Allow two minutes for warm-up and note any error messages or deviations from normal 
operation.
•Do not connect a sampling line to the female Patient Spirometry connector while the other end 
of the sampling line is connected to the D-fend water trap. The pressure in the gas sampling 
system may cause damage to the PVX unit pressure transducers.
Autoclaving and sterilizing
•
Do not autoclave any part of the monitor. 
•Do not gas sterilize the modules.
Cleaning and service
•
Do not use hypoclorite, ammonia-, phenol-, or acetone based cleaners. These cleaners may 
damage the monitor surface.
•Do not immerse any part of the device in any liquid, or allow liquid to enter the monitor or 
modules.
•Do not apply pressurized air to any outlet or tubing connected to the monitor.
•Electrostatic discharge through the PC boards may damage the components. Before handling 
PC boards, wear a static control wrist strap. Handle all PC boards by their non-conductive edges 
and use anti-static containers when transporting them.
•Do not break or bypass the patient isolation barrier when testing PC boards.
•Do not clean the spirometry tubes with high pressure air or O2 flushing while the spirometry 
tubes are connected to Patient Spirometry connector. High differential pressure may damage 
PVX unit pressure transducers.
Special components
•
Special components are used in these monitors that are vital to assure reliability and safety. GE 
Healthcare assumes no responsibility for damage, if replacement components not approved by 
GE Healthcare are used.
Batteries
To replace the batteries safely, please refer to the service instructions in this manual.
•A lithium battery on the CPU Board. Dispose of the faulty IC containing the battery according to 
local regulations. 
						

							Introduction
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                                          Document no. M1031517-02
•Do not short-circuit the battery terminals, this may produce a very high current, which will 
damage the battery.
•Do not dispose of the battery into open flame, nor put the battery near fire, as it may explode.
•Do not dismantle the battery.
See also section “Symbols”.
Storage and transport
Do not store or transport the monitor outside the specified temperature, pressure and humidity 
ranges:
Temperature -10...+50 °C/14...122 °F
Atmospheric pressure 660...1060 hPa/500...800 mmHg/660...1060 mbar
Relative humidity 10...90% noncondensing
For display specific environmental requirements see specifications in the “Display” slot.
1.2.2 ESD precautionary procedures
•
To avoid electrostatic charges building up, it is recommended to store, maintain and use the 
equipment at a relative humidity of 30% or greater. Floors should be covered by ESD dissipative 
carpets or similar. Non-synthetic clothing should be used when working with the component. 
•To prevent applying a possible electrostatic discharge to the ESD sensitive parts of the 
equipment, one should touch the metallic frame of the component or a large metal object 
located close to the equipment. When working with the equipment and specifically when the 
ESD sensitive parts of the equipment may be touched, a grounded wrist strap intended for use 
with ESD sensitive equipment should be worn. Refer to the documentation provided with the 
wrist straps for details of proper use.
ESD precautionary procedure training
It is recommended that all potential users receive an explanation of the ESD warning symbol and 
training in ESD precautionary procedures. 
The minimum contents of an ESD precautionary procedure training should include an introduction to 
the physics of electrostatic charge, the voltage levels that can occur in normal practice and the 
damage that can be done to electronic components if they are touched by an operator who is 
electrostatically charged. Further, an explanation should be giv e n  o f  m e t h o d s  t o  p r e v e n t  b u i l d - u p  o f              
electrostatic charge and how and why to discharge one’s body to earth or to the frame of the 
equipment or bond oneself by means of a wrist strap to the equipment or the earth prior to making a 
connection.
1.2.3 Disposal
Dispose of the whole device, parts of it and its packing material in accordance with local 
environmental and waste disposal regulations.  
						

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Document no. M1031517-02                                                                           
2 System description
2.1 Introduction
Datex-Ohmeda monitors build up a freely configurable modular system. The architecture is designed 
to enable different module combinations so that the user is able to get the desirable parameter and 
feature set. This modular approach makes it possible to add new features when they are needed.
2.2 Bus structure
Figure 2 General bus structure of S/5 system
The CPU bus is a communication channel used only for internal data transfer. It is based on the ISA 
bus used in IBM PC computers. Data is transferred on this 16 bit wide bus using the CPU clock 
frequency.
The module bus is for the parameter modules. The bus is based on the industry standard RS-485, 
which uses a differential serial method to transfer data. This type of bus is robust and it allows 
parameter modules to be inserted or removed while the power is on. The module bus uses a 500 kbps 
data transfer rate.
The RS-485 type of serial communication supports so-called multidrop or party line connections. This 
means that all parameter modules connected to the module bus use exactly the same lines for 
communication. The advantage of this is that all bus connectors are identical and the modules can be 
connected in any order and position.
486
Processor
PCMCIASerialEthernetSoundUPI
Chipset
Display
Controller486 LOCAL BUS
ISA-BUS
DRAM
Reset
Logic
Non-
Volatile
MemoryBoot
MemoryCode
Memory
Patient
ModulePatient
ModulePatient
Modules
MODULE-BUS
cam_p1_gnrl_bus_strctr_cm.vsd 
						

							System description
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2.3 Distributed processing
A system assembled from S/5 products is a multiprocessor system. All parameter modules have their 
own microprocessor, which performs functions such as module key control, waveform filtering, 
parameter related computing and pneumatic control, etc. At the same time the main CPU performs 
higher level tasks such as trending and alarm control. While the parameter modules and CPU are 
performing their tasks, the UPI (Universal Peripheral Interface) microprocessor handles all functions 
needed to transfer data between the parameter modules and the CPU. 
This kind of parallel processing gives one major advantage to centralized processing. When new 
parameter modules are added to the system, the processing power is increased. As a result, the 
system does not slow down when new features are added.
2.4 Module communication
The communication master controlling data transfers between the CPU and parameter modules is 
called UPI processor. It sends data to each connected module 100 times a second. Modules respond 
to each data request immediately by sending a data package, whose length depends on the type of 
the module. This communication protocol ensures that each module receives and sends data every 
10 ms. If a module does not respond to data requests, the UPI processor presumes that the module is 
disconnected.
Parameter modules may hold a static (fixed) or dynamic address, which the UPI processor uses when 
sending out data. Two parameter modules of the same type must not be fitted onto the same monitor 
since they might reply to a data request simultaneously, thus causing communication errors.
Figure 3 Principle of UPI section operation
The UPI processor collects and stores all data that is received from the parameter modules into a 
shared SRAM, which is mapped directly to the address space of the main CPU. The main CPU reads 
data from the memory while the UPI processor guarantees that the data is up to date. This operation 
also works in the other direction. In this the main CPU fills the shared SRAM with data and the UPI 
processor distributes it to the parameter modules.
UPI
Processor
Shared
SRAM
Control
Logic
ISA-BUS
Voltage
MeasTemp
Meas
Keypad Interface
ComW heel Interf ace
Module Bus
Analog & Digital outputs
cam_p1_prncpl_UPI_operation.vsd 
						

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Document no. M1031517-02                                                                           
2.5 Software loading
The program memory on the CPU board is loaded with monitor software at the factory. The software is 
used for running all the functions that are integrated into the PC board. For service and upgrade 
procedures, the CPU board is fitted with a PCMCIA card drive through which new software can be 
loaded.
2.6 Parameter modules
Figure 4 General structure of parameter modules with patient isolation
The detailed structure of a parameter module depends on the specific needs for each individual 
parameter. However, some common parts are used in the parameter modules. The electronics inside 
the module is usually divided into isolated (floating) and non-isolated sections. Typically, the 
non-isolated section consists of buffers to interface the parameter module to the module bus while 
the rest of the electronics is located in the isolated section. The isolated section includes the 
microcontroller together with memory components, the front-end analog electronics (amplifiers, etc.) 
and sensor drivers.
Module Bus
Isolation
transformer
RS485
drivers
Peripheral
drivers
A/D
converterCPUAnalog
electronics
Opto
isolationRAM
EEPROM
Patient isolation
PATIENT
Module
keys
Data
+13...16 V
VMOD+5 V
+12 V
general_struct_of_parm_mod.vsd 
						

							System installation
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                                          Document no. M1031517-02
3 System installation
3.1 Unpacking instructions
1. Confirm that the packing box is undamaged. If the box is damaged, contact the shipper.
2. Open the top of the box and carefully unpack all components.
3. Confirm that all components are undamaged. If any of the components are damaged, contact 
the shipper.
4. Confirm that all components are included. If any of the components are missing, contact your 
GE Healthcare distributor.
3.2 Choosing location
Consider the following aspects:
•lighting
•space
•connections
•electromagnetic and radio frequency interference, see Appendix B. ElectroMagnetic 
Compatibility
•environment
WARNINGThe monitor or its components should not be used adjacent to or stacked with 
other equipment. If adjacent or stacked use is necessary, the monitor and its 
components should be observed to verify normal operation in the configuration in 
which it will be used. 
WARNINGNever install the monitor so that it is above the patient.
CAUTION The monitor display is fragile. Ensure that it is not placed near a heat source or 
exposed to mechanical shocks, pressure, moisture or direct sunlight.
3.3 S/5 Frame for Compact Monitor
Mounting of S/5 Compact Monitor to the Bed Mount, Wall Mount or Roll Stand is described in a 
separate instruction sheet delivered with each mount.
WARNINGAfter transferring or reinstalling the monitor, always check that it is properly 
connected and all parts are securely attached. Pay special attention to this in 
case of stacked mounting. 
						

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Document no. M1031517-02                                                                           
3.3.1 Compact Monitor connections
Figure 5 External connections of Compact Monitor frame F-CM(C)1 rev.04 
(1) Air filter
(2) NET connector
(3)  NET ID connector (not used with N-CMW)
(4) Recorder (optional)
(5) SYNC connector
(6)  Connector for external keyboard (anesthesia record keeping solution keyboard), K-CREMCO or 
Barcode Reader
(7) Potential equalization
(8) Serial port
(9)  Receptacle for power cord
(10)  WLAN PC card LED
(11)  WLAN PC card
(12)  Slot for Memory Cards (PCMCIA) and WLAN PC card
(13)  Connector for Device Interfacing Solution
(14) Modules
NOTE: Insert the WLAN PC card in the first PC card slot from the front.
1
7
8
9
2
4
3
5
6
14
12
13
11
10