GE S5 Service Manual
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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 VBUS is 10-17V. PMB also controls the fan voltage and
battery charging.
The blocks in “Figure 2” represent different functions on the board.
Module power supply
This block generates the voltages needed for the parameter modules from the selected power source
(VBUS), and delivers those to the module motherboard through connector X3. These voltages are
+5V, +15V, -15V and +15Vdirty.
Module power supply
CPU unit
Battery
charger
supply
PMB +5V supply
Power path switching
electronics
Fan
power
supplyDU
conn.
X9AC/DC
conn.
X10
Sideplate connector (D-
15, X6)
Battery #1
connectorBattery #2
connector
Signals to
DU,X4
Module motherboard
conn. X3
Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors 6 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 current) •Module power supply start-up and shutdown •Power path management (choosing the correct supply source) •Monitor start-up and shutdown control PMB +5V supply This unit provides the PMB CPU and other PMB electronics +5V power supply. Input either internal battery or AC/DC output, output +5V. Battery charger supply The charger generates the desired charge current for the batteries from the AC/DC output voltage. At fast charge rate the current is 1A, at timed charge the current is 500mA for 1/3 rd of the time and at trickle charge rate the current is 500mA for 7/500 th of the time. The charge rate is controlled by the CPU block. Power path switching electronics The power source to be used (batteries or AC/DC output) is chosen initially by a ‘power path controller’ inside this block. The CPU unit has full control over the power path management after the initial choice is made at start-up. In addition to the power path, the charge current path is also chosen by the CPU and driven by the power path controller. WARNINGFor as long as the AC/DC unit or either one of the two internal batteries is connected, the open metal surfaces in this area contain approximately 15V voltages. An accidential touch of a screwdriver or anything else conductive may short-circuit the power lines and destroy PMB electronics. Frame fan power supply This unit drives the fan (mounted in the side frame unit). It is controlled by the CPU unit, and driven according to AC/DC current information and frame temperature. 2.4 Module motherboard The module motherboard routes signals from the PMB to the module slots. Signals include power supplies and module data buses.
Frame Unit for F-CM(C)1 (rev. 04), F-CM(C)REC1 (Rev. 01)
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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 by the PMB board in the Frame Unit.
The AC/DC power supply is protected by an overvoltage protection. If the output voltage increases
over 17V, the protection is activated and the AC/DC power supply unit does not return to normal
operation until the power cord is briefly disconnected.
2.6 Batteries
There are two NiMH batteries attached to the bottom of the Frame Unit. The PMB board connects one
of the batteries to be the power source, if no power is received from the AC/DC power supply.
The battery charging is controlled by PMB. The normal charge current for the batteries is 170mA RMS.
When the batteries are full, the charging is continued by a 10mA current (trickle charge) to avoid
self-discharge of the batteries.
2.7 Frame Unit Fan
The Frame Unit Fan is used for cooling the Frame Unit electronics, the modules and the AC/DC power
unit. The fan is controlled by the PMB. The rotation speed of the fan is adjusted according to the frame
temperature and AC/DC power unit load. At monitor start-up, the fan is briefly run at full speed to
ensure its operation.
2.8 In-built Recorder Unit
The recorder unit is located in the Side Frame Unit, and it is connected to the Connector Board
PMB-REC with a small connector board and 12-pin flex-strip cable.
External Communication
Communication with the monitor Central Processing Board takes place via the Connector Board
PMB-REC, PMB, the Connector Board to Display Unit and the Display Unit DC/DC power unit.
The communication uses +5 V CMOS level RS232 serial interface with an RS485 reset.
ResetThe differential RS485 reset from the module bus generates a Recorder Unit reset signal on the
Recorder Board. The Recorder Board also generates a power-up-reset, whose time constant is
approximately 0.1 second. The Recorder Unit reset signal is therefore active when either the Module
Bus RS485-reset or the power-up-reset is active.
+5 V priorityThe recorder unit supply voltage, +15 VREC is switched on after +5 V is present.
Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors 8 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 +5V
Frame Unit for F-CM(C)1 (rev. 04), F-CM(C)REC1 (Rev. 01)
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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
9IDCS1 (chip select)
IDCL (clock)
IDDI (data in)
IDDO (data out)
IDPE (protect enable)
+5Vdc
Direct ECG
Nurse call
GND
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
123
456
78
5
91
6
Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors 10 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 bits 8 and Stop bits 1. For more information about the S/5 Compact Monitor serial data interface see also this manual, Part II Slot I “Display Unit”.
Frame Unit for F-CM(C)1 (Rev. 04), F-CM(C)REC1 (Rev. 01)
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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
designation and a detailed fault description.
CAUTION Only trained personnel with appropriate tools and equipment shall perform the tests
and repairs outlined in this section. Unauthorized service may void the warranty of the
unit.
3.2 Service check
S/5 Compact Anesthesia Monitor, F-CM(REC)1
S/5 Compact Critical Care Monitor, F-CMC(REC)1
These instructions include complete procedures for a service check. The service should be performed
after any service repair. Additionally, the service check procedures can also be used for determining
possible failures.
The procedures should be performed in ascending order.
The instructions include a check form (“APPENDIX A”) which should be filled in when performing the
procedures.
The symbol
in the instructions means that the check list should be signed after performing
the procedure.
3.2.1 Recommended tools
3.2.2 Recommended parts
Tool Order No. Notes
Power cord
Screwdrivers
Multiparameter hemodynamic module
Part Order No. Notes
Frame Unit Fan filter 896085
Recorder paper 74205 for recorder unit
Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors 12 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. •Disassemble the Side Frame Unit. •Detach the battery cables from the Power Management Board. 3.2.4 Visual inspection 1. Side Frame Unit Check the Side Frame Unit: •screws are tightened properly •cables are connected properly •connectors are clean and intact 2. PMB and the Connector Boards Check the Frame Unit from inside. Check the PMB and the Connector Boards: •there are no loose objects inside the Frame Unit •all screws are tightened properly •all connectors are clean and intact •cables are connected properly 3. Frame Unit reattached Reconnect the battery cable. Reattach the Side Frame Unit. Reattach the Frame Unit back plate. Reattach the AC/DC power unit. NOTE: Make sure that all insulation plates are placed correctly before reattaching the rear cover. 4. Battery slot Internal parts under bottom cover Detach the bottom cover and check internal parts: •the battery cable is connected properly •the batteries are properly in place
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 intact
6. Module connections
Check that the module in use goes in smoothly and locks up properly in both module slots.
Leave the module connected.
7. Fan filter
Clean or replace the Frame Unit Fan filter.
8. Recorder
Clean the recorder unit, if installed:
Open the paper compartment cover and take out the paper roll.
Clean the paper compartment off of possible paper chaff.
Clean the thermal printhead and the small glass window before the static brush with a cotton
swab dipped in isopropyl alcohol. Avoid contact with the rubber paper roller.
NOTE: Be careful to limit the application of alcohol to the thermal printhead and the window.
Attach a new paper roll into the recorder and close the cover.
9. Primary fuses
Disconnect the primary fuse holder. Check that:
•the fuse compartment, the fuse holder and the fuses are clean and intact
•the fuses are of the correct rating
Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors 14 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 start-up sound is heard from the loudspeaker and the normal monitoring screen appears. No error messages should appear on the screen. 12. Module recognition Configure the monitor screen so that all the needed parameter information is shown: Monitor Setup Screen 1 Setup Waveform Fields Digit Fields Check that the selected parameter information is shown on the screen. NOTE: InvBP waveforms are not shown until without a patient simulator. Do no connect the simulator to the monitor at this stage. 13. Main software Enter the service menu: Monitor Setup Install/Service (Password 16-4-34) Service (Password 26-23-8) Take down the information regarding Power Management Board software and Battery.