GE S5 Service Manual

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6. Open the four screws holding the metal EMC cover in the Display Unit front cover.
7. Open the two screws covering the video flat cable and ferrite in the LCD Display element. 
8. Lift the EMC cover carefully up.
9. Open the four screws holding the LCD element in the Display Unit front cover.
10. Lift the LCD Display element carefully up.
NOTE: Do not use excessive force when fastening the display component to the metal frame. 
Fastening the screws too tightly might bend the display module too much and break it. The screws 
must also be fastened gradually: first fasten all screws slightly, then more tightly.
NOTE: When reassembling the LCD Display component, be careful that no dirt or finger prints are left 
between the LCD element and the protection glass window.
NOTE: If the LCD Display unit is broken, handle it carefully to avoid injury (the LCD Display component 
and the backlight lamp(s) are made of glass). Wash your hands if you touched liquid crystal, which 
may flow out from a broken LCD Display component.
NOTE: Do not touch, push or rub the exposed display module surface. Keep the surface clean. In case 
of accidental mishandling, see the instructions following this chapter.
3.3.11 Changing the LCD backlights, F-CM(C)(REC)1 rev.00
1. Disassemble the Display Unit.
2. Detach the backlight cables from the Inverter Board.
3. Push the lid beside the backlight to release the backlight tube. Pull the backlight out.
NOTE: Do not bend the backlight tube.
NOTE: Do not touch the backlight tube with your hands.
3.3.12 Changing the LCD backlights, F-CM(C)(REC)1 rev.01, rev.02
1. Disassemble the Display Unit.
2. Detach carefully the lower keyboard flat cable from the Connector Board.
3. Detach carefully the side panel keyboard flat cable from the Connector Board.
4. Detach the ComWheel cable.
5. Detach the backlight cables from the Inverter Board.
6. Open the four screws holding the metal EMC cover in the Display Unit front cover.
7. Open the two screws covering the video flat cable and ferrite in the LCD Display element.
8. Lift the EMC cover carefully up.
9. Release the screw holding the backlight tubes in their place. 
NOTE: The screw cannot be removed totally, only released.
10. Detach the backlight tube by sliding it to the left and then lift it up.
NOTE: Do not bend the backlight tube.
NOTE: Do not touch the backlight tube with your hands. 
						

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Document no. M1031520-02                                                                           
3.3.13 Changing the LCD backlight, F-CM(C)1 rev.03 and rev.04
Perform the steps 1-8 as in section 3.3.12. Changing the LCD backlights, F-CM(C)(REC)1 rev.01, 
rev.02.
1. Detach the screw holding the backlight tube set in place.
2. Detach the backlight tube set by pulling it to the left.
NOTE: Do not bend the backlight tube.
NOTE: Do not touch the backlight tube with your hands.
3.3.14 Handling and storage of LCD Display component
Handling of LCD Display component and protective window
If the LCD Display component surface becomes dusty, wipe it gently with absorbent cotton, chamois 
or other soft material. If necessary, breathe onto the display surface and wipe immediately. The 
display surface may also be cleaned using a small amount of normal hexane. Do not use acetone, 
toluene or alcohol because they cause chemical damage to the polarizer.
1. Wipe off saliva and water drops as soon as possible. Their prolonged contact with the polarizer 
cause deformations and color fading.
2. Do not open the component case because internal circuits are sensitive to electrostatic 
discharges.
Taking a spare part LCD Display component or a display shield into use:
Peel off the protective film slowly (in more than 10 seconds) from the display or protective window 
surface. Fast peeling may generate enough static electricity to destroy the LCD Display component.
Storaging an LCD Display component as a spare part for a long period
1. Store the display in a dark place. Do not expose it to sunlight or fluorescent light. Keep the 
temperature between 5 °C and 35 °C at normal humidity.
2. The polarizer surface should not come into contact with any other object. It is recommended 
that the display unit is stored in the container in which it was originally shipped.
3.3.15 Downloading the software on empty Central Processing Board
In case of a faulty Central Processing Board refer first to chapter “To remove the Central Processing 
Board (CPB) from the Display Unit Back Unit” and then follow the instructions for downloading service 
software below.
NOTE: All user settings will be lost after downloading of a new monitor software.
NOTE: During the downloading of the software, the serial number of the monitor is written on the 
software card. The software can then be downloaded again to the same monitor, but not to any other 
monitor.
1. Make sure that the monitor is switched to standby. Press and hold the service reset button on 
the rear panel for at least five seconds or until the service reset indicator LED turns off.
2. Open the cover for card drive slots, if installed. Insert the software card into one of the card drive 
slots and press the software card firmly in position.
3. Make sure that at least 30 seconds have passed since the service reset, then switch the monitor 
on. 
						

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4. Wait for approximately 80 seconds. After the start-up screen appears, enter the Service View 
and make sure that the information regarding the monitor software has been updated. 
Memorize the serial number of the new software.
5. Remove the software card.
6. Replace the original device plate for monitor software by the new one supplied with the software 
card.
7. Perform Factory Reset. Make sure that the monitor functions normally after the restart.
8. Set the time and date.
9. Set the monitor’s network communication according to the used network software, if necessary. 
The communication is set in the monitor’s Network service menu.
Network software S-CNET99 -> DRI Level = 1999
Network software S-CNET01 -> DRI Level = 2001
Network software S-CNET02 -> DRI Level = 2001 or 2002 (WLAN)
Network software L-NET03 -> DRI Level = 2003
Network software L-NET05 -> DRI Level = 2005
NOTE: The DRI Level 1999 is not selectable in all monitor software versions.
NOTE: If the DRI level is changed, the monitor will restart automatically.
Fill out all necessary documentation regarding the new monitor software.
NOTE: The license agreement of monitor software needs to be in accordance with the monitor 
software serial number. Make sure you archive the license agreement in a secure location.
NOTE: The first start-up after software loading takes considerably longer.
See also the troubleshooting chart for the software card, if necessary.
3.3.16 Performing Factory Reset
NOTE: The factory reset is necessary after replacing monitor software.
NOTE: The factory reset will restore all customized defaults, including language selection, to factory 
defaults.
1. Press the 
Monitor Setup key.
2. Select Install/Service and password (16-4-34).
3. Select Service and password (26-23-8).
4. Select Set/ Test and Factory Reset.
5. The monitor will perform an automatic restart. After the restart is completed, restart the monitor 
also manually.
3.4 Adjustments and calibrations
It is not necessary to perform calibrations or adjustments on S/5 Compact Monitors. 
						

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Document no. M1031520-02                                                                           
4 Troubleshooting
4.1 General (Display Unit)
Trouble Cause Treatment
Monitor is not starting 1. On/Stby key pressed too long.
2. The batteries are empty.
3. If power cord connected, AC/DC power unit 
may be faulty.
4. If AC/DC power unit is working, the PMB 
board in the Frame Unit may be faulty.
5. On/Stby key may be faulty.1. On/Stby key may be pressed less than 10 s.
2. Connect the power cord.
3. Exchange the AC/DC power unit.
4. Exchange the PMB board.
5. Exchange the DU side panel keyboard foil.
Monitor is not starting, the Frame Unit 
back panel led is lit.1. The connection between Frame Unit and 
Display Unit may be faulty.
2. Display Unit voltages are not OK.
3. Faulty Central Processing Board.1. Check the connector and the cables 
between Display Unit and Frame Unit.
2. Replace the Display Unit DC/DC power 
board.
3. Replace the Central Processing Board.
The monitor starts (Frame Unit back panel 
led is lit and a beep is heard), but the 
display remains black.1. The LCD display cables are loose.
2. The backlights are not lit. 1. Check the LCD cables and connectors on 
the Central Processing Board and in the Front 
Unit.
2. Connector Board cable may be loose. 
Check the cable. 
Backlights may be faulty. Exchange them.
Backlight Inverter may be faulty. Exchange the 
Inverter.
Module data disappears from the screen. Parameter module current (in PMB) too high. Detach and change the parameter module.
PMB module power section may be faulty. 
Exchange the PMB.
‘Battery failure’ message on the display. 1. Problem in communication between Display 
Unit and Frame Unit (in Service View PMB serial 
number and other data faulty)
2. PMB in Frame Unit may be faulty1. Check the connectors and cables between 
Display Unit and Frame Unit.
2. Exchange the PMB. 
Recorder is not working properly. 1. Recorder communication problem.
2. Problem in voltages in Frame Unit.1. Check the connectors and cables between 
Display Unit and Frame Unit.
2. Check the Frame Unit voltages from the 
service menu. If not OK, replace the PMB 
board.
Keyboard not working, but module 
communication is OK.Keyboard cables and connectors, or Connector 
Board cable and connector) may be faulty.Check the Connector Board cable and 
connector. 
Check the keyboard cable connection to the 
connector board.
Keyboard not working, and module 
communication not working.UPI section of the Central Processing Unit not 
functioning normally.Restart the monitor.
Replace the Central Processing Board.
Keyboard partly not working. 1. Keyboard faulty.
2. Connector Board faulty1. Replace the keyboard foil.
2. Replace the Connector Board.
Display temperature high and 
Check dust filter messages.The temperature inside the display unit has 
been more than 55 °C for two minutes at the 
minimum.Check and change the dust filter if necessary. 
						

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4.2 Software License (service software)
NOTE: You can download the software only onto one monitor. During the downloading of software the 
serial number of the monitor is written on the software card, and if the loading for some reason would 
fail, the software can be downloaded again onto the same monitor, but not onto any other monitor.
4.3 Error messages
Battery temperature high and 
Check dust filter messages.The temperature of the batteries is more than 53 
°C.Check and change the dust filter if necessary.
Display Unit is too warm. Display Unit Fan is not working. Check the Fan cable is connected to the 
correct connector. 
After shut off, the trend and patient data 
does not remain 15 min in the memory.The On/Stby switch has been pressed for over 
10 s. (= service reset)When switching off, the On/Stby switch has to 
be pressed for less than 10 s. 
Trouble Cause Treatment
New software is not downloaded or 
Start-up display does not appear in 80 
seconds.1. The software card is not properly inserted.
2. The software card does not contain proper 
software. 1. Check the software card’s connection in 
drive.
2. Check that correct software card is inserted 
in drive.
The software serial number in the Service 
view is not correct after downloading.The software has not been downloaded 
correctly.Check the software card’s connection in drive.
Try downloading once again.
Try with an other software card. 
Please read the note below*
Message Explanation
SRAM Error The SRAM memory is located on the CPU board. The SRAM Error is due to memory malfunction. 
Restart the monitor. If the problem persists, replace the SRAM/Timekeeper battery. Remember 
to perform factory reset after the replacement.
EPROM Error The EPROM Error message is displayed due to problems in the communication between the CPU 
board and the software flash memory. Replace the CPU board. Remember to perform factory 
reset after the replacement.
EEPROM Error The EEPROM memory is located on the CPU board. The EEPROM Error message is displayed due 
to memory malfunction. Perform factory reset. If the problem persists, replace the CPU board. 
Remember to perform factory reset after the replacement.
RAM Error The RAM memory is located on the CPU board. The RAM Error message is displayed due to 
memory malfunction. Replace the CPU board. Remember to perform factory reset after the 
replacement.
Trouble Cause Treatment 
						

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Document no. M1031520-02                                                                           
4.4 Memory Option
4.5 Troubleshooting for the NET section
Trouble Cause Treatment
‘Two Data Cards in mem. module’ message Two Data cards detected. Remove MemCard from the left hand side slot 
of the module.
‘Two Menu Cards in mem. module’ message Two Menu cards detected. Remove MemCard from the right hand side slot 
of the module.
‘No menus in Menu Card’ message There are no menus in the Menu card. Insert a Menu card with valid menu 
configuration files in the module.
‘Faulty Data Card - change card’ message An error has occurred during Data card 
read/write operationChange Data card.
‘Faulty Menu Card - change card’ message An error has occurred during Menu card 
read/write operationChange Menu card.
Trouble Cause Treatment
Monitor does not connect to the network.
Monitor connects to the network, but 
disconnects unexpectedly (‘Network 
connection down’ message on the 
monitor screen).Patch panel  Patch cable not connected to HUB or to panel.
Patch cable  Patch cable or connector defective.
HUB not connected to the power supply.
HUB port closed due to physical layer problems.
HUB port temporarily closed and reopened due to physical 
layer problems.
Hubs not properly connected to each other.
Monitor-Network cable Cable not properly connected to the wallplate or to the 
monitor.
Monitor-Network cable Cable or connector defective.
Net section of the CPB The NET section is defective. Replace the CPB.
NET section memory on the CPB The SRAM of the NET section is defective or uninitialized. The 
NET cannot be used. See network service page for details.
Identification plug There is no identification plug attached to the monitor.
The identification plug is defective or uninitialized. The plug 
cannot be used.
Monitor does not connect to the Network No Network Option in the monitor Download the Network option from the appropriate software 
card.
‘Check network connectors’ message 
shows on the monitor screenMonitor-Network cable Cable not properly connected to the wallplate or to the 
monitor.
Cable or connector defective.
Identification plug There is no identification plug properly attached to the 
monitor.
The identification plug is defective or uninitialized. The plug 
cannot be used. See network service page for details. 
						

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‘Network board error’ message shows on 
the monitor screenNET section on the CPB The NET section is defective. The board cannot be used. See 
network service page for details.
NET section memory on the CPB The SRAM memory of the NET section is defective or 
uninitialized. The board cannot be used. See network service 
page for details.
Other Site View shows no waveforms  No waveforms are set up for 
Monitor-to-Monitor communicationRun Datex-Ohmeda Network Setup to verify current 
Monitor-to-Monitor communication setup.
Network printing fails Print server is busy Network managers print server is busy at the moment and 
cannot take more print jobs. Try again after 15 seconds.
Print queue is full There are too many unprinted documents waiting in the print 
queue. Check the printer, as it is not operating properly.
Printer is off-line Printer cable is loose, printer is out of paper, there is a paper 
jam or the printer is simply switched to off-line state.
Record keeper menus are blank There are no menus for the record 
keeperRun Datex-Ohmeda Network Setup to verify the current set up. 
						

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Document no. M1031520-02                                                                           
5 Earlier revisions
This manual fully supports the earlier revisions of the S/5 Compact Anesthesia and Compact Critical 
Care Monitors. 
						

							Appendix A, Service check form, S/5 Compact Anesthesia Monitor, S/5 Compact Critical Care Monitor
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Document no. M1031520-02
APPENDIX A Service check form, S/5 Compact Anesthesia Monitor, 
S/5 Compact Critical Care Monitor
OK = Test OK            N.A. = Test not applicable           Fail = Test failed Customer
 
Service Module type S/N
Service engineer
 Date
Monitor Installation
 
F- E- E-
S- E- M-
L- M- N-
      OK          N.A.         Fail     OK          N.A.         Fail
1. DC/DC power supply 
board                           2. Central Processing Board
                           
3. DC/DC power board
                           4. Net Unit and 
Synchronization Unit                           
5. Front Unit
                           6. External parts
                           
7. Inserting module
                           8. Fan filter
                           
9. Stand-by LED
                           10. Start-up
                           
11. Monitor screen 
configuration                           12. Mark Event or Take 
Snapshot                           
13. Time and date
                           14. Loudspeaker
                           
15. Display brightness
                                                       
16. Monitor software   LPower Management board 
software    
17. Content of service log
                            
						

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18. Power supply output voltages
+12 V  11.50...12.50 V
+3.3 V   3.00....3.60 V
Vbus 10.00...17.00
      OK          N.A.         Fail
19. Watchdog circuitry
                           20. Alarm LEDs
                           
21. Membrane keys check
                           22. ComWheel check
                           
23. K-ARK connector
                           24. Module communication
                           
25. Battery
                           
26. Battery voltage        .  10...17 V
27. Monitor temperature 20...40 C
28. Battery operation
                           29. Reconnecting the power 
cord                           
Notes
 
 
Recorder unit
     OK          N.A.         Fail
30. Cover open recognition
                           31. Recording
                           
32. Paper speed
                           33. Quality of recording
                           
Notes