GE S5 Service Manual

							Display Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1031520-02
Figure 5 Display Controller Block Diagram
2.5 MEM section
2.5.1 Memory Card interface
The memory interface consists of a PD6722 controller and two PCMCIA compatible card sockets. 
Both sockets consist of 60 signal and 8 power connections. The controller communicates with the 
CPU. Card insertions and removal are also detected by the controller.
The MemCards are PCMCIA-ATA compatible. The MemCard files are MS-DOS compatible, and they 
can be copied for archiving with any MS-DOS compatible computer equipped with PCMCIA-ATA 
specification compatible card drive. 
The MemCard function is optional. The operation requires a software option.
The monitor software can be downloaded to the monitor Flash memory through the memory interface. 
2.5.2 Power supply
The memory section receives its power (+5V, +12V) from the CPB. PCMCIA card programming voltage 
is +12V. The card programming voltage is controlled by the interface controller. 
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display_contrllr_diagrm.vsd 
						

							Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1031520-02                                                                           
Figure 6 Memory Section Block Diagram
2.6 NET section
The Ethernet interface controller is basically the heart of the NET section. The interface controller 
communicates with the CPU section through the CPU bus. The section also contains a 4k SRAM 
memory.
The network interface controller transmits data packets to the Datex-Ohmeda Network and receives 
data packets from the network through the 10BASE-T transformer. The transformer filters and 
transforms the data and also provides the isolation.
The Ethernet status LEDs indicate the status of the network communication. The status LEDs are 
controlled by the network controller. The LEDs are located on the Central Processing Board.
The PLD interfaces the coding element. The coding element contains information on the monitor 
location. The network address and the monitor location information are transmitted to the CPU 
section directly through the CPU bus.
PCMCIA
SLOTSPCMCIA
Controller
CPU BUS
Voltage
switch
display_mem_sec_digrm.vsd 
						

							Display Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1031520-02
Figure 7 Central Processing Board, block diagram 
2.6.1 Ethernet interface
The data transformer is designed by Datex-Ohmeda and it is hospital grade approved.
Adapter’s 10BASE-T is an interface with low-pass filters on the unisolated side of the transformer. On 
the isolated side there is a common mode choke for both transmitting and receiving lines.
The three LEDs on the board, which are not seen from the outside, indicate the following things: 
activity on the network, collision detection and a good link in 10BASE-T interface.
The activity LED flashes when communication packets are detected in the Datex-Ohmeda Network. 
The collision detection LED indicates a packet collision on the network. The collision detection LED 
should flash only occasionally, otherwise there may be a physical layer problem. The good link LED 
indicates whether or not the communication link to the HUB is functional. The good link LED should 
always be lit.
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display_cntrl_proc_brd_digrm.vsd 
						

							Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1031520-02                                                                           
2.7 Wireless LAN
Datex-Ohmeda Wireless Network is an extension to, or an alternative for, a wired Datex-Ohmeda 
Network. It provides same network services than the wired Datex-Ohmeda Network.
The monitor network is a local area network based on standard Ethernet technology. The monitor 
network is formed by connecting one Central and up to 32 bedside monitors together. 
The Central and the bedside monitors are connected to a 10 Mbps hub. The hub works as a multiport 
repeater and controls the information flow between all the devices connected to the monitor network. 
The communication protocol for the monitor network is Datex-Ohmeda specific.
Wireless bedside monitors can use both the wired and wireless network. If the network cable is 
connected, the wired Datex-Ohmeda Network is used.
For using Wireless LAN connection, the monitor requires Symbol24 Wireless LAN antenna card.
For configured parameters please refer to the Datex-Ohmeda Network, Wireless LAN Installation 
Guide. 
						

							Display Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1031520-02
Figure 8 Central Processing Board parts
2.8 Front Unit
NOTE: The LCD display backlight circuit runs on a high voltage. Do not touch the inverter board or 
the backlight tube leads when powered.
Front Unit includes an LCD display component, Inverter Board, Connector board and Keyboard.
The Front Unit is connected to the Central Processing Board with two cables: video signal cable and 
Connector Board cable. The video signal cable transmits the video signal from the CPB to the LCD 
display. Video signalling between the Display Controller on the CPB and the Front Unit is analogic. 
Backlight power, keyboard and ComWheel signals are routed through the Connector Board Cable.
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display_central_proc_diagr.vsd 
						

							Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1031520-02                                                                           
2.8.1 Backlights
The backlight consists of two replaceable cold-cathode fluorescent tubes driven by a separate 
inverter board.
2.8.2 Connector board
The connector board is used for connecting the backlight power, keyboard and ComWheel signals 
between the Central Processing Board and the Front Unit. 
2.8.3 Keyboard 
There are two keyboards in the Display Unit Front Unit: front panel and side panel keyboards. The 
keyboards are foil membrane keypads. There is no separate processor for the keyboards. The 
keyboards are connected to the UPI section of the Central Processor Board through Connector Board.
2.9 Display Unit DC/DC power supply   
This DC/DC converter board transforms primary voltage of between +10 and +18 VDC to +3.3V, +5V, 
and +12 V secondary voltages. All the output voltages have common ground. 
The DC/DC power supply is powered by Vbus voltage generated by the Frame Unit AC/DC converter 
(mains). If the mains power fails, the DC/DC power supply is powered by batteries.
Turn-on and shut-down sequences of the DC/DC power supply are controlled by a logic on the DC/DC 
board and by the Central Processor Board software. If overvoltage occurs at an output line, the 
converter turns itself off automatically. 
The Display Unit DC/DC converter supplies also a Display Unit fan. 
						

							Display Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1031520-02
2.10 Connectors and signals
2.10.1 External connectors
Figure 9 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
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2
4
3
5
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14
12
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10 
						

							Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1031520-02                                                                           
Figure 10 External connectors of Compact Monitor Frame rev.00...03
(1) Dust filters
(2)  Recorder unit (optional)
(3)  Connector for factory use only
(4) Synchronization connector
(5)  Connector for external keyboard (anesthesia record keeping solution keyboard), K-CREMCO or 
Barcode Reader
(6)  Potential equalization connector
(7)  Serial port connector
(8)  Receptacle for power cord
(9)  NET ID connector
(10) NET connector
(11)   WLAN antenna cover (optional)
(12)  Connector for Device Interface Solution
(13)  WLAN antenna card LED
(14)  WLAN antenna card (optional)
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8 
						

							Display Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1031520-02
DIS connector, X5 DIS interface 
Network connector, X5
Coding element connector, X4
Direct ECG (pin 7)
Delay (max.): 15 ms
Gain ECG (in)/ECG (out): 1 mV/1V
NOTE: The direct ECG out signal is not available with modules M-ESTP rev. 01, M-EST rev. 00 and 
M-ETP rev. 00.
Nurse call (pin 8)
The nurse call signal is generated by the red and yellow alarms. When activated, the signal is set to 
the high state and remains at the high state until the alarm situation is over or the SILENCE ALARM 
key is pressed. The high state range is from 2.8 to 5 V, while the low state range is from 0 to 0.8 V.
If the output signals are used simultaneously with the coding element, a B-UPINET Y-cable (order 
number 889308) should be used.  RS422 connector Pin No. Signal
1
2
3
4
5
6
7
8DIS_out +
DIS_out -
15V_DIS
GND
8V_DIS
GND
DIS_in +
DIS_in -
RJ45 connector Pin No. Signal
1
2
3
4
5
6
7
8Tx +
Tx -
Rx +
N/C
N/C
Rx -
N/C
N/C
9 pin female D-connector Pin No. Signal
1
2
3
4
5
6
7
8
9IDCS1 (chip select)
IDCL (clock)
IDDI (data in)
IDDO (data out)
IDPE (protect enable)
+5Vdc
Direct ECG
Nurse call
GND
123
456
78
5
91
6 
						

							Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1031520-02                                                                           
Keyboard connector, X9
Synchronization connector, X8
Direct ECG (PIN 3):
Delay (max.): 15 ms
Gain ECG (in)/ECG (out): 1 mV/1V
NOTE: The direct ECG out signal is not available with modules M-ESTP rev. 01, M-EST rev. 00 and 
M-ETP rev. 00.
Pressure out (PIN 4):
P1 from hemodynamic module
Gain Signal (out) / Pressure (in): 1V/100 mmHg
Pressure area 0…300 mmHg
RS232 Serial data connector X11
5 pin connector Pin Signal
1
2
3
4
5KB_CLK
KB_DATA 
not in use
GND
+4.75 - +5.25V
4 pin female connector Pin No. Signal
1
2
3
4GND
Def_Sync
Direct ECG
Pressure Out
9 pin male D-connector Pin No. Signal
1
2
3
4
5
6
7
8
9GND
RxD
TxD
NC
GND
N/C
RTS
CTS
N/C