Dräger Evita 4 Setup guide

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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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Contents
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Dräger Medizintechnik D
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
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5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 3
Dräger Medizintechnik D
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
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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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Contents
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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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Dräger Medizintechnik D
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.
1
8
9
15
V
+–
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)
A
A
A
A
B
C

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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
EE
EE

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1.3 Retrofitting the Optional DC Module
• Disconnect the power plug from the socket-outlet.
• Remove the power supply unit.
• Remove the nuts A.
• Remove the cover plate B.
Fig. 7: Removing the cover plate
• Remove the screws Cat the top and the bottom of the power supply unit.
Fig. 8: Disassembling the empty housing of the power supply unit
B
A
A
top bottom
C
C
C
C
C
C

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• Remove the empty housing.
• Disconnect the connectors D(on 2 single black cables coming from the mains filter)
from the power supply unit basic board and connect them to the battery module.
Fig. 9: Connections between the power supply unit and the DC module (part 1)
• Connect the 2-core cable E(with 3-pin plug housing) to the battery module. The
connector of the cable must be plugged onto the pins of the battery module such that
the retaining clamp engages firmly (the retaining clamp is located above the cut pin).
The 2-core cable E is located on older power supply units at the mains filter and is
secured with a cable tie. With newer power supply units the calbe is “parked” on the
PCB in the power suppy unit on a connector.
D
Mains
filter

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Fig. 10: Connections between the power supply unit and the DC module (part 2)
• Connect the green 8-pin connector Fto the power supply unit basic board.
• Connect the red 10-pin connector Gto the power supply unit basic board.
Attention: Observe encoding pin.
Fig. 11: Connections between the power supply unit and the DC module (part 3)
• Thread the red 2-pin connector Hthrough the opening on the front panel. The red cable
of the 2-pin red connector must point upwards (+).
E
F
G

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Fig. 12: Connections between the power supply unit and the DC module (part 4)
• Open the battery compartment.
• Plug the battery terminal into the battery compartment.
• Mount the DC module by following the reverse method used for dismounting of the
empty housing.
H
DANGER
Hazardous voltages present. DO NOT plug the battery terminal into the
battery.
CAUTION
Kinked or squeezed cables may cause short-circuits. DO NOT kink or
squeeze cables during reassembly.

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• Slide the cover plate B, noses first, over the red 2-pin connector H.
• Secure the cover plate.
Fig. 13: Mounting the cover plate
• Connect the battery terminal to the battery.
• Mount the cover of the battery compartment.
• Mount the power supply unit.
• Switch the Evita on.
• Enable the “DC module” option by entering “4811”.
• Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate.
IMPORTANT:
If the Evita should not start, the batteries might be exhausted. Connect the Evita to the power
supply and allow the batteries to recharge (several hours).
+
–
BH

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1.4 Replacing the Optional Rechargeable Battery
To replace the optional rechargeable battery, proceed as described below:
• Disconnect the power cord from the socket-outlet.
• Remove the power supply unit.
• Remove the Phillips screws A.
• Remove the cover B.
Fig. 14: Power supply unit (viewed from top)
A
A
B

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• Remove the connector C.
• Remove the batteries D.
Fig. 15: Replacing the battery in the power supply unit
• Install the new batteries in the power supply unit.
• Reassemble the power supply unit by following the reverse method used for
disassembly.
• Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate.
C
D
D
CAUTION
Incorrect polarity may damage the power supply unit and the batteries. When
installing new batteries, make sure the polarity is correct.
IMPORTANT
Exhausted batteries must be charged for several hours during mains
operation. Otherwise, malfunctions (relay noise) are possible during DC
operation.

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2 CPU 68332 PCB
2.1 Power Supply to the CPU 68332 PCB
X2 (Power supply only)
Pin Assignment Pin Assignment
1c +12 V 8c AGND
2c +24 V 15c DGND
3c +15 V 16c +5 V (also at X11)
4c –15 V
X11
Pin Assignment
1 +5 V supply voltage
3DGND
X13
Pin Assignment
1+5VISO
3GNDISO
VCC RAM
Pin Assignment
32 +5 V (minimum voltage for retention of data: 2 V)
16 DGND
CAUTION
Electrostatic discharge can damage electronic components. Use an ESD
protection mat and a wrist strap when handling electronic modules.

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Fig. 16: Components mounting diagram of the CPU 68332 PCB
1
4
X5 X6 X7
1
2
X4
1
2
X3
1X9
X11
LP CPU Best.
+5 V
GND
+
17
X20 X13 X10
1
X12
C400
X1 X2
+5 V-ISO
GND
U1
D35
D1
G2
D22
Service LEDs
G2=Battery
U1 = DC/DC converter
D35 = Real-time clock
D1 = Microprocessor
D22 = EEPROM
RAMs
D10
D11
D12
D13

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2.2 Service LEDs on the CPU 68332 PCB
The service LEDs indicate the active reset.
Service LED Reset Meaning
1 Overvoltage The +5 V voltage is too high.
2 Undervoltage The +5 V voltage is too low.
3 CPU reset The CPU resets its own interface system which
is located on the CPU 68332 PCB, or the CPU
is reset.
4 Reset up The pneumatics resets the CPU 68332 PCB.
5 Reset down The CPU resets the pneumatics and the boards
on the motherboard.
6 Display reset The CPU resets the control unit.
7 Pneumatics disabled This signal is initialized if the pneumatics is not
functioning properly. It will remain active until
the pneumatics functions properly again.