Dräger Evita 4 Einrichtungshandbuch

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Contents

GBR5664500T055664800IVZ.fm

5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 1

Dräger Medizintechnik D

Repair Instructions – Electronic Components

1 Power Supply Unit 6

1.1 Output Voltages ...............................................................................................................6

1.1.1 Sub D Socket Configuration .......................................................................7

1.1.2 Voltage Measurement ....................................................................................8

1.2 Replacing the Power Supply Unit ................................................................................9

1.3 Retrofitting the Optional DC Module ........................................................................11

1.4 Replacing the Optional Rechargeable Battery ...................................................... 16

2 CPU 68332 PCB 18

2.1 Power Supply to the CPU 68332 PCB .................................................................. 18

2.2 Service LEDs on the CPU 68332 PCB .................................................................. 20

2.3 Replacing the Battery on the CPU 68332 PCB ....................................................21

2.4 Replacing the Real-Time Clock on the CPU 68332 PCB .................................. 22

2.5 Replacing the CPU 68332 PCB .............................................................................. 23

2.6 Test Possible in DS Mode .......................................................................................... 24

2.6.1 Diagnosis Mode ........................................................................................... 24

2.6.2 External DS Mode Using PC ..................................................................... 24

2.7 Conversions ................................................................................................................... 25

2.7.1 Retrofitting of CPU 68332 PCB as per IDM No. 6.............................. 25

3 Communication PCB (Optional) 26

3.1 Power supply to the Communication PCB ............................................................. 26

3.2 Communication PCB Connector Pin Assignment ................................................ 26

3.3 Replacing the Communication PCB ........................................................................ 29

3.4 Tests possible in DS mode ......................................................................................... 30

3.4.1 Diagnosis mode............................................................................................ 30

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3.4.2 External DS mode using PC...................................................................... 30

4 Paediatric Flow PCB Option for Evita 4 as of SW 2.20 31

4.1 Power Supply to the Paediatric Flow PCB ..............................................................31

4.2 Connector Pin Assignment of the Paediatric Flow PCB ......................................31

4.3 Replacing the Paediatric Flow PCB ......................................................................... 33

5 CO2 Carrier PCB 34

5.2 CO2 Carrier PCB Connector Pin Assignment ...................................................... 35

5.3 Replacing the CO2 Carrier PCB .............................................................................. 38

5.4 Tests possible in DS mode ......................................................................................... 38

5.4.1 Diagnosis mode............................................................................................ 38

5.4.2 External DS mode using PC...................................................................... 38

5.5 Conversions ................................................................................................................... 39

5.5.1 Replacing CO2 Carrier PCB According to IDM No. 3 (Evita 4) ....... 39

5.5.2 Conversion due to Error Message “Ext. Battery reversed poles”

IDM No. 2 (Evita 2 dura) or IDM No. 19 (Evita 4)40

5.5.3 Conversion for Device Error 02.71.003 IDM No. 2 (Evita 2 dura) or IDM

No. 19 (Evita 4)41

6 Power Supply PCB (CO2measurement) 42

6.1 Power Supply to the Power Supply PCB ................................................................ 42

6.2 Connector Pin Assignment on the Power Supply PCB ....................................... 42

6.3 Measuring the Voltages on the Power Supply PCB ............................................. 43

6.3.1 Printed Circuit Board on Extender Board............................................... 43

6.3.2 Printed Circuit Board in the Evita............................................................. 43

6.4 Test Points on the Power Supply PCB .................................................................... 44

6.5 Replacing the Power Supply PCB ........................................................................... 45

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Contents

GBR5664500T055664800IVZ.fm

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7 Processor Board PCB (CO2measurement) 46

7.1 Power Supply to the Processor Board PCB .......................................................... 46

7.2 Connector Pin Assignment of the Processor Board PCB .................................. 46

7.3 Replacing the Processor Board PCB ...................................................................... 48

8 CO2 Measurement 49

8.1 Fault Diagnosis Chart .................................................................................................. 49

8.2 CO2 Sensor ..................................................................................................................50

9 SpO2 Module (Optional) 51

10 Graphics Controller PCB Evita 4 52

10.1 Power Supply to the Graphics Controller PCB ..................................................... 52

10.2 Connector Pin Assignment of the Graphics Controller PCB ............................. 52

10.3 Replacing the Graphics Controller PCB ................................................................ 57

10.4 Tests possible in DS mode ......................................................................................... 58

10.4.1 Diagnosis mode............................................................................................ 58

10.4.2 External DS mode using PC...................................................................... 58

11 Display with DC/AC converter for backlighting Evita 4 59

11.1 Power Supply to the Display ...................................................................................... 60

11.2 Connector Pin Assignment of the Display .............................................................. 60

11.3 Replacing the Display ...................................................................................................61

11.4 Testing DC/AC converter for backlighting ............................................................. 63

11.5 Tests possible in DS mode ......................................................................................... 63

11.5.1 Diagnosis mode............................................................................................ 63

11.5.2 External DS mode using PC...................................................................... 63

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Contents

GBR5664500T055664800IVZ.fm

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12 Backlighting Evita 4 64

12.1 Toshiba Display (1995 or later), Version 1 .............................................................. 64

12.1.1 Power Supply to the Backlighting ............................................................ 64

12.1.2 Replacing the Backlighting........................................................................ 65

12.2 NEC Display (1996 or later), Version 2 ................................................................... 66

12.3 Sharp Display (1996 or later), Version 3 ................................................................. 66

12.4 Toshiba Display (1997 or later), Version 0 .............................................................. 66

13 Touchscreen/Window Evita 4 67

13.1 Power Supply to the Touchscreens .......................................................................... 67

13.2 Replacing the Touchframe ......................................................................................... 68

13.3 Tests possible in DS mode ......................................................................................... 69

13.3.1 Diagnosis mode............................................................................................ 69

13.3.2 External DS mode using PC...................................................................... 69

13.4 Replacing the Window ................................................................................................ 69

14 7-Segment PCB Evita 2 dura 71

14.1 Voltage Supply to the 7-Segment PCB ....................................................................71

14.1.1 X1 Connector on the 7-Segment PCB.....................................................71

14.2 7-Segment PCB Repair Information .........................................................................71

14.3 7-Segment PCB Component Layout Diagram ....................................................... 72

15 Frontpanel PCB Evita 2 dura 73

15.1 Voltage Supply to the Frontpanel PCB .................................................................... 73

15.1.1 X1 Connector on the Frontpanel PCB to the Electronics................... 73

15.2 Voltage Supply to Peripheral Equipment ................................................................ 73

15.2.1 X2 Connector on the Frontpanel PCB to the 7-Segment PCB ......... 73

15.2.2 X3 Connector on the Frontpanel PCB to the Membrane Keyboard. 73

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15.2.3 X5 Connector on the Frontpanel PCB to the Control Knob ...............74

15.2.4 X7 Connector on the Frontpanel PCB to the display............................74

15.2.5 X9 Connector on the Frontpanel PCB to the DC/AC Transformer...74

15.3 Front Panel PCB Repair Information ........................................................................74

15.4 Frontpanel PCB Component Layout Diagram ....................................................... 75

16 Pneumatics Controller PCB 76

16.1 Power Supply to the Pneumatics Controller PCB ................................................ 76

16.2 Connector Pin Assignment of the Pneumatics Controller PCB ........................ 76

16.3 Replacing the Pneumatics Controller PCB ............................................................ 84

16.4 Tests possible in DS mode ......................................................................................... 85

16.4.1 Diagnosis mode............................................................................................ 85

16.4.2 External DS mode using PC...................................................................... 85

17 HPSV Controller PCB 86

17.1 Power Supply to the HPSV Controller PCB .......................................................... 86

17.2 Replacing the HPSV Controller O2/AIR PCB ....................................................... 88

17.3 Notes Relating to Trouble Shooting ......................................................................... 89

17.4 Tests possible in DS mode ......................................................................................... 89

17.4.1 Diagnosis mode............................................................................................ 89

17.4.2 External DS mode using PC...................................................................... 89

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Repair Instructions – Electronic Components

1 Power Supply Unit

1.1 Output Voltages

The power supply unit provides the following output voltages:

•+24V

•+15V

•–15V

•+12V

•+5V.

The output voltages and other signals are available at a Sub D socket (Extensionbox). This

Sub D socket is located on the rear panel.

Important: With devices manufactured end of 96 or later, the extension box connector is no

longer available. The voltages must therefore be measured on the Pneumatics Controller

PCB at pins X3, X11, and X21.

Fig. 1: Rear view (Sub D socket)

Extensionbox

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1.1.1 Sub D Socket Configuration

Important: The voltages can be read out in diagnosis mode refer to section of "Repair

Instructions - Service No./ Modi, Error list" chapter 3.3.2, Diagnosis page “Microprocessor”

of “Electronics”, page 70. or with external DS mode using PC refer to section of "Repair

Instructions - Service No./ Modi, Error list" chapter 9.4.1, Testing voltages, page 138. and

refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.2, Power

pack status, page 140.

Pin Assignment Pin Assignment

1 +24 V –1680 mV +720 mV 5 +5 V, 15 V ±77.3 mV

2 +15 V ±450 mV 7 Shield

3 AGND 9 +12 V ±240 mV

4 DGND 10 –15 V ±450 mV

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1.1.2 Voltage Measurement

Important: With devices manufactured end of 96 or later, the extension box connector is no

longer available. The voltages must therefore be measured on the Pneumatics Controller

PCB at pins X3, X11, and X21.

The voltages +5 V and +24 V are connected to digital ground (pin 4). The voltages +15 V,

–15 V, and +12 V are connected to analog ground (Pin 3).

Example of a voltage measurement:

Fig. 2: Sub D socket

• If no voltages are present, check the mains fuses on the rear panel (if the +24 V voltage

is not present, check the control unit for short circuit).

Fig. 3: Rear view (mains fuses)

IMPORTANT

The +5 V voltage is only stable under load. At no-load, the voltage is affected

by interfering pulses. These interfering pulses may cause voltage peaks in the

measured value display. Measure the +5 V voltage only under load.

+–

Extensionbox

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1.2 Replacing the Power Supply Unit

Replace the complete power supply unit as follows:

• Disconnect the power plug from the socket-outlet.

• Remove the plastic screws Afrom the left and right side panels of the Evita.

• Remove the cover.

Fig. 4: Side views (removing the power supply unit, step 1)

• Remove the cord grip B.

• Remove the power cord C.

Fig. 5: Rear view (removing the power supply unit, step 2)

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• Remove the Phillips screws E.

Fig. 6: Rear view (removing the power supply unit, step 3)

• Slide the power supply unit out of the Evita (from the rear).

• Mount the new power supply unit by following the reverse method used for dismounting.

• Switch the Evita on and allow it to warm up for 10 minutes.

• Check the electrical safety of the Evita (perform VDE test).

IMPORTANT

If a DC module is available in the Evita, you cannot measure the equivalent leakage current as

with a normal Evita. Before measuring the equivalent leakage current, perform the following

steps:

• Disconnect the power plug from the socket-outlet.

• Remove the external battery, if available.

• Switch the Evita on.

• Wait until the internal battery is discharged (the Evita goes off after approx. 10 to

15 minutes).

• Connect the Evita to the VDE portable measuring set.

IMPORTANT

If the Evita is supplied with voltage from the mains supply, you cannot measure the equivalent

leakage current. DO NOT supply the Evita with mains voltage. DO NOT press the “run” button

on the VDE portable measuring set.

• Measure the equivalent leakage current using the VDE portable measuring set.

Extensionbox

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