GE S5 Service Manual

Frame Unit for F-CM(C)1 (rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1044470-01
2.3 PMB (Power Management Board)
Figure 2 Location of the Power Management Board (side frame panel removed) and the 
PMB block diagram
The Power Management Board (PMB) is responsible for distributing DC current for the rest of the 
frame. The power source can be the AC/DC unit or one of the internal batteries, and the chosen power 
line is referred to as ‘VBUS’. The voltage of...

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1044470-01                                                                           
PMB CPU unit
The CPU unit controls all other functions of the board. The functions include:
•Battery current monitoring
•Battery capacity calculations
•Battery temperature monitoring
•Battery charger control
•Frame fan voltage control
•Level-change of recorder serial line signals
•Module power supply measurements (voltages & input...

Frame Unit for F-CM(C)1 (rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1044470-01
2.5 AC/DC Power Supply Unit
The universal AC/DC power supply provides an isolated 15.5 V supply for the S/5 Compact Monitor. 
The power unit is attached to the Frame Unit by four screws and a power-D25 connector. 
The cooling air for the AC/DC unit is from the Frame Unit fan through cooling holes in the Frame Unit 
back plate. The power unit generates a load signal, which is read...

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1044470-01                                                                           
2.9 Connectors and signals
Module motherboard
Table 1 Module connector pinout (X1-X4):
25 pin male D-connector Pin No. Signal
1 Reset_485
2-15V
315Vdirty
4+15V
5 Data_485_
6 Data_485
7GND
8 Reset_485_
9CTSB
10 RTSB
11 RXDB
12 TXDB
13 GND
14 NC
15 GND
16 CTSC
17 RTSC
18 RXDC
19 TXDC
20 NC
21 PWM_ECG
22 RXD_RS232
23 TXD_RS232
24 +5V
25...

Frame Unit for F-CM(C)1 (rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1044470-01
2.9.1 External Connectors
Table 2 Network Connector, X5
Table 3 Coding element connector, X4
Table 4 RS232 Serial data connector X11
For information about  S/5 Compact Monitor external connectors see this manual, Part II  Slot I 
“Display Unit”.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...

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1044470-01                                                                           
2.9.2 Serial Data Interface
The Serial Data Interface connector is a 9-pin male D-connector (X3) on the side of the AC/DC power 
unit.
The serial interface is an asyncronous RS-232 connection which uses hardware flow control. The 
communication speed is 115.2 kbps. The communication uses the following parameters: Parity 
None, Data...

Frame Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1044470-01
3 Service procedures
3.1 General service information
The field service of the S/5 Compact Anesthesia Monitor and S/5 Compact Critical Care Monitor is 
limited to replacing faulty PC boards and mechanical parts. Return the faulty PC boards to GE 
Healthcare for repair.
GE Healthcare is always available for service advice. Please provide the unit serial number, full type...

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1044470-01                                                                           
3.2.3 Before beginning
•
Make sure that the monitor is switched to standby.
•Disconnect the power cord and press the service reset switch until the LED next to it turns off.
•If the monitor is connected to the Datex-Ohmeda Network, disconnect the Mon-Net cable. Take 
out any memory cards, if installed.
•Remove the AC/DC Power Unit....

Frame Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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                                          Document no. M1044470-01
•there are no loose objects inside the battery slot
Reattach the bottom cover.

5. External parts
Check external parts:
•the four rubber pads under the monitor are all in place
•all stickers are intact
•the Display Unit is attached properly
•all mechanical parts are functioning properly
•the service reset switch is intact
•the handle is attached properly
•the monitor frame is...

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
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Document no. M1044470-01                                                                           
Reconnect the fuse holder and check that it locks up properly.

3.2.5 Functional inspection
10. Stand-by LEDs
Connect the power cord.
Check that the standby LED starts blinking.
Check that the fan starts running.

11. Start-up
Switch the monitor on.
Check that the monitor starts up properly, i.e. the alarm LEDs turn blank, the...