Datex-Ohmeda S-5 Service Manual Frame F-CU8

Datex-Ohmeda

S/5™ 8-Module Frame, F-CU8 (Rev. 07)

Technical Reference Manual

Datex-Ohmeda Inc.
3030 Ohmeda Drive
MADISON, WI 53718
U.S.A.
Tel. [phone] Fax [phone]

www.us.datex-ohmeda.com

All specifications are subject to change without notice.

Document No. 8001003-2

October 2001

Datex-Ohmeda Division,

Instrumentarium Corp.

P.O. Box 900, FIN-00031

DATEX-OHMEDA, FINLAND

Tel. [phone] Fax [phone]

www.datex-ohmeda.com

 Instrumentarium Corp. All rights reserved.

Table of contents

TABLE OF CONTENTS

8-module frame, F-CU8

TABLE OF CONTENTS i

TABLE OF FIGURES ii

Introduction 1

1 Specifications 2

1.1 8-Module Frame, F-CU8............................................................................................................................2

1.1.1 Electrical requirements.....................................................................................................................2

1.1.2 Environmental requirements .............................................................................................................2

2 Functional Description 3

2.1 8-Module Frame, F-CU8............................................................................................................................3

2.1.1 Power supply unit.............................................................................................................................4

2.1.2 CPU mother board ..........................................................................................................................12

2.1.3 Module mother board .....................................................................................................................12

2.2 Connectors and signals...........................................................................................................................12

2.2.1 Internal connectors.........................................................................................................................12

3 Service Procedures 15

3.1 General service information.....................................................................................................................15

3.2 Service check .........................................................................................................................................15

3.2.1 Recommended tools ......................................................................................................................15

3.2.2 Recommended parts......................................................................................................................15

3.3 Disassembly and reassembly..................................................................................................................21

3.3.1 Power supply unit...........................................................................................................................22

3.3.2 Lead acid battery............................................................................................................................22

3.3.3 Changing fuses...............................................................................................................................22

3.4 Adjustments and calibrations..................................................................................................................22

4 Troubleshooting 23

4.1 Troubleshooting flowcharts......................................................................................................................23

4.1.1 Monitor..........................................................................................................................................23

4.1.2 Central Unit....................................................................................................................................24

4.1.3 Digital section................................................................................................................................25

5Service MENU 26

5.1 Service menu structure ...........................................................................................................................26

5.2 Service...................................................................................................................................................27

5.3 Service menu .........................................................................................................................................28

5.4 Frame ....................................................................................................................................................28

5.4.1 Power Supply.................................................................................................................................29

6 Spare Parts 30

6.1 Spare parts list .......................................................................................................................................30

6.1.1 8-Module Frame, F-CU8 rev. 01......................................................................................................30

6.1.2 8-Module Frame, F-CU8 rev. 02......................................................................................................32

6.1.3 8-Module Frame, F-CU8 rev. 03......................................................................................................32

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6.1.4 8-Module Frame, F-CU8 rev. 04......................................................................................................32

6.1.5 8-Module Frame, F-CU8 rev. 05......................................................................................................32

6.1.6 8-Module Frame, F-CU8 rev. 06......................................................................................................33

6.1.7 8-Module Frame, F-CU8 rev. 07......................................................................................................33

7 Earlier Revisions 34

APPENDIX A 35

SERVICE CHECK FORM A-1

TABLE OF FIGURES

Figure 1 8-Module Frame, F-CU8 .......................................................................................................................1

Figure 2 Basic structure of S/5 Monitor, an example of possible configuration.....................................................3

Figure 3 Power supply unit block diagram...........................................................................................................4

Figure 4 Mains part and display outlet block diagram..........................................................................................5

Figure 5 Power supply board block diagram........................................................................................................7

Figure 6 Power logic board block diagram ........................................................................................................10

Figure 7 Monitor troubleshooting flowchart .......................................................................................................23

Figure 8 Central Unit troubleshooting flowchart.................................................................................................24

Figure 9 Digital section troubleshooting flowchart .............................................................................................25

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Document No. 8001003-2

INTRODUCTION

This section provides information for the maintenance and service of the following products:

• 8-Module Frame, F-CU8 (also called Central Unit)

8-Module Frame, F-CU8 (Rev. 07)

• Power supply unit

• CPU mother board

• Module mother board

Figure 1 8-Module Frame, F-CU8

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Datex-Ohmeda S/5 AM and S/5 CCM

1 SPECIFICATIONS

1.1 8-Module Frame, F-CU8

Dimensions, D ×××× W ×××× H 382 ×××× 315 ×××× 128 mm (15.0 ×××× 12.4 ×××× 5.0 in)
Weight 9.5 kg (21 lbs)

1.1.1 Electrical requirements

Power supply 100, 110-120, 220-240 VAC 50/60 Hz, 1.2 A (for whole system)
Stability ±10 % of nominal voltage
Power consumption 280 VA
Grounding Hospital grade
Interruptibility Data memory and alarm settings are saved during power failures up

1.1.2 Environmental requirements

to 15 minutes

Operating temperature 10...35 °C / 50...95 °F
Storage temperature -10...+50 °C / 14...122 °F
Atmospheric pressure 660...1060 hPa (660...1060 mbar)
Humidity 10...90 % non-condensing (in airway 0...100 % condensing)

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2 FUNCTIONAL DESCRIPTION

2.1 8-Module Frame, F-CU8

To operate S/5 Anesthesia Monitor or S/5 Critical Care Monitor, the following products should be
installed into the frame

• CPU board, B-CPU4 w/ main software

• UPI4 or UPI4NET board, B-UPI4 or B-UPI4NET

• Display controller board, B-DISP

The frame has two sections. The front part is for the modules. On the between the front and rear
parts, there are module mother board and CPU mother board. The module mother board connects
modules to the system, and the CPU mother board connects boards together.

Display

8-Module Frame, F-CU8 (Rev. 07)

Airway Module

CPU Mother Board

Module Mother Board

Gas
Interface
Board

Command
Board

Display
Controller
Board

CPU Bus

Module Bus

COP Module

UPI
Board

P Module

Software Card
w/ B-CPU4

Software Cartridge
w/ B-CPU2/3

CPU
Board

ESTP Module

NIBP Module

Power
Supply
Unit

Recorder Module

Figure 2 Basic structure of S/5 Monitor, an example of possible configuration

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Datex-Ohmeda S/5 AM and S/5 CCM

2.1.1 Power supply unit

Power supply unit contains three PC boards (power supply board, power logic board, and triac
board) and four external components (mains transformer, fan, loudspeaker, and lead acid battery).

All the operational controls in the power supply unit are located in the three PC boards.

DISPLAY
OUTLET

DISPLAY
OUTLET

ON/STBY
SW ITCH
ON
COM MAND
BOAR D

MAINS
TRANSFOR MER

TRIAC
BOARD

c

FAN

SILENCE ALARM
DIP SW ITCH
ON POW ER
SUPPLY BO ARD

LO U D ­SPEAKER

T 10 A

TRIA C

c

c

c

RECTIFIERS,
POW ER
FAC TO R
CORRECTION

*P O W E R
ON/STBY
CONTROL,
BATCHRG,
etc.

+32 V d

15 V d

*AUDIO
AM P.

c

c

+5 Vcpu

+5 V int

ON/STBY

32 V

+32 Vd
SW ITCH

-1 5 V
CONVERTER

c

+ 1 5 V
CONVERTER

c

+32 V d

-1 5 V

f(-15V )

st(-15V )

+5 V cpu

GND

c

+15 V d

+15 V a

f(+15 V )

st(+15 V)

AUDIOin

+5 V

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6 V
BATTERY

2AF

BATCHRG

STOP

c

SERVICE
RESET
BUTTON

*C P U
IN T E R F A C E

c

c

*P O W ER O N /S TB Y C O N TR O L, AU D IO A M P ., and C P U IN TER FA C E are in P ow er
Logic B oard. A ll other functions are in Pow er S upply B oard.

Figure 3 Power supply unit block diagram

+ 5 V
CO NVERTER

c

f(+ 5 V )

st(+5 V )

RESET C PU

RESET

POW ERFAIL

WD

Figure 4 Mains part and display outlet block diagram

8-Module Frame, F-CU8 (Rev. 07)

Power supply board

Rectifiers

Rectifiers processes 21 VAC from the mains transformer.

Power factor correction

Power factor correction is performed in a preregulator. The regulator modifies output current from
sinusoidal power lines into sinusoidal form. Its purpose is to boost efficiency of the mains
transformer.

Battery charging

Batchrg charges the 6 V battery which maintains the supply voltage of CPU for 15 minutes after the
power is cut off. The battery is charged as long as the power cord is connected to the mains outlet.

Supply voltage for pulse width modulators

Supply voltage for pulse width modulators of chopper power supplies is generated by 12 V
regulator at power-up and if +15 V is short-circuited. Otherwise the supply voltage comes
from +15 V.

-15 V converter

-15 V converter is a Flyback-type chopper power supply that generates -15 V analog voltage from
+32 V. The load capacity is 500 mA (7.5 W). +5 Vcpu is also generated in this converter.

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+15 V converter

+15 V converter is a Buck-type chopper power supply that generates +15 V from +32 V.

The output of the power supply is divided into two; +15 Va for analog voltage and +15 Vd for less
sensitive components.

+5 V converter

+5 V converter is a Buck-type chopper power supply that generates +5.1 V from +32 V. The load
capacity is 8 A (40 W).

+5 V, +15 V, +32 V, and +5 Vcpu checking

Those voltages are checked and if one of them increases more than is allowed, thyristor pulls the
rectified +32 V down.

Service reset button

Service reset button is for service purpose. Press this button with an appropriate tool for at least
five seconds before you remove any PC board or the Power supply unit from the rear of the Central
Unit.

Before connecting the power cord back and start monitoring, be sure that at least one minute has
passed after the service reset button has pressed. Too short time may lead to memory flaw.

Audible alarm for power fail

Under the cover plate of the Power supply unit there are two dip switches. By turning the switches
to the left the audio alarm is activated. When mains power fails the audio alarm is generated by the
lead-acid battery.

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8-Module Frame, F-CU8 (Rev. 07)

Figure 5 Power supply board block diagram

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Datex-Ohmeda S/5 AM and S/5 CCM

Power supply board interface to CPU mother board

Pin c2,c4: +32 Vd

Rectified and filtered +32 V dirty voltage. This voltage is switched on by pulses of +15 V chopper
power supply which turns the switching transistor on with the help of charging pump. The switching
transistor is a short-circuit protected MOSFET. The ripple voltage when fully loaded is about 3 Vpp
at the frequency of two times mains frequency.

Pin c32: -15 V

Accuracy of -15 V is ±2 %. The load capacity is 500 mA and the ripple voltage about 30 mVpp at
the chopper frequency (200 kHz ±10 %).

Pin c22: f (-15 V)

The chopper frequency measured at the rear panel connector whose pulse ratio corresponds to the
pulse width modulator's pulse ratio. For test use only.

Pin c20: st (-15 V)

Pin a2,a4: +15 Vd

Pin 32: +15 Va

Pin b22: f (+15 V)

Pin b20: st (+15 V)

The chopper can be turned off by connecting this line at the rear panel connector to ground. For
test use only.

Accuracy of +15 V is ±2 %. The load capacity is 6.5 A if +15 Va is not loaded. The ripple voltage
about 50 mVpp at the chopper frequency (200 kHz ±10 %).

+15 V for analog voltage. The load capacity is 1.2 A and is passive filtered from +15 Vd. The ripple
voltage about 10 mVpp at the chopper frequency (200 kHz ±10 %).

The total load capacity of +15 Va and +15 Vd is about 6.5 A (97.5 W).

The chopper frequency measured at the rear panel connector whose pulse ratio corresponds to the
pulse width modulator’s pulse ratio. For test use only.

Pin a6,a8,b8: +5 V

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Document No. 8001003-2

The chopper can be turned off by connecting this line at the rear panel connector to ground. For
test use only.

Nominal voltage is 5.1 V and its accuracy is ±2 %. The load capacity is 8 A. The ripple voltage
about 50 mVpp at the chopper frequency (200 kHz ±10 %).

Pin a22: f (+5 V)

Pin a20: st (+5 V)

Pin b10: +5 Vcpu

Pin b14: -RESET

8-Module Frame, F-CU8 (Rev. 07)

The chopper frequency measured at the rear panel connector whose pulse ratio corresponds to the
pulse width modulator's pulse ratio. For test use only.

The chopper can be turned off by connecting this line at the rear panel connector to ground. For
test use only.

Supply voltage for the CPU. Nominal voltage is 5.1 V. The accuracy is ±2 % and the load
capacity 1 A. The ripple voltage is 50 mVpp. The +5 Vcpu is connected to linearly regulated battery
voltage when the choppers are switched off.

Signal for the digital boards.

Pin a10: -RESET CPU

Signal for the CPU.

Pin a12: -POWERFAIL

The signal informs about supply voltage failure to the CPU.

Pin b12: WD

Watchdog input signal. The CPU must toggle WD within every 1.6 seconds. Otherwise the power
supply will generate -RESET and -RESET CPU signals.

Pin c12: AUDIOin

Audio signal which is amplified in Audio-amp. circuit.

Ground

All the signals and lines within the Power supply unit share the common ground which is connected
to monitor chassis.

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