Dräger Evita 4 Repair Instructions

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

Contents GBR5664500T055664800IVZ.fm 5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 2 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 (CO2 measurement) 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

Contents GBR5664500T055664800IVZ.fm 5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 3 Dräger Medizintechnik D 7 Processor Board PCB (CO2 measurement) 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

Contents GBR5664500T055664800IVZ.fm 5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 4 Dräger Medizintechnik D 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

Contents GBR5664500T055664800IVZ.fm 5664.500/800 Evita 4/Evita 2 dura 02/98 Repair Instructions Page 5 Dräger Medizintechnik D 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

06/98 Repair Instructions Page 6 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Repair Instructions – Electronic Components 1 Power Supply Unit 1.1 Output Voltages The power supply unit provides the following output voltages: • +24 V • +15 V • –15 V • +12 V • +5 V. 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

06/98 Repair Instructions Page 7 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 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

06/98 Repair Instructions Page 8 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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

06/98 Repair Instructions Page 9 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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 A from 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

06/98 Repair Instructions Page 10 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • 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 E E E E

06/98 Repair Instructions Page 11 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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 C at 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

06/98 Repair Instructions Page 12 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • 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

06/98 Repair Instructions Page 13 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 10: Connections between the power supply unit and the DC module (part 2) • Connect the green 8-pin connector F to the power supply unit basic board. • Connect the red 10-pin connector G to 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 H through the opening on the front panel. The red cable of the 2-pin red connector must point upwards (+). E F G

06/98 Repair Instructions Page 14 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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.

06/98 Repair Instructions Page 15 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • 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). + – B H

06/98 Repair Instructions Page 16 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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

06/98 Repair Instructions Page 17 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • 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.

06/98 Repair Instructions Page 18 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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 3 DGND X13 Pin Assignment 1 +5 V ISO 3 GND ISO 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.

06/98 Repair Instructions Page 19 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 16: Components mounting diagram of the CPU 68332 PCB 1 4 X5 X6 X7 1 2 X4 1 2 X3 1 X9 X11 LP CPU Best. +5 V GND + 1 7 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

06/98 Repair Instructions Page 20 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 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.

06/98 Repair Instructions Page 21 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 2.3 Replacing the Battery on the CPU 68332 PCB • Switch the Evita on and allow it to warm up for 2 minutes (in order to charge the capacitor for power supply to the RAMs). • Write down the customer-specific settings (alarm limits, screen layout, etc.) for later entry in case they get lost. • Switch the Evita off. • Remove the CPU 68332 PCB. • Remove the battery. Fig. 17: Component mounting diagram CPU PCB (replacing the battery) • Place the new battery into the battery mount. • Install the CPU 68332 PCB in the Evita. • Secure the CPU 68332 PCB with the screws. • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate. IMPORTANT Data loss will occur if the RAM supply voltage is not present. Replace the battery within one minute’s time. Pay attention to correct polarity when installing the battery. 1 4 X5 X6 X7 1 2 X4 1 X9 X11 +5 V GND + 1 7 X20 X13 X10 C400 +5 V-ISO GND +

06/98 Repair Instructions Page 22 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 2.4 Replacing the Real-Time Clock on the CPU 68332 PCB • Switch the Evita off. • Remove the CPU 68332 PCB. • Remove the real-time clock (D35). Fig. 18: Component mounting diagram CPU PCB (replacing the real-time clock) • Insert the new real-time clock into the IC socket. • Install the CPU 68332 PCB in the Evita. • Secure the CPU 68332 PCB with the screws. • Switch the Evita on. • Adjust time and date. • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate. 1 4 X5 X6 X7 1 2 X4 1 X9 X11 +5 V GND + 1 7 X20 X13 X10 C400 +5 V-ISO GND D35

06/98 Repair Instructions Page 23 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 2.5 Replacing the CPU 68332 PCB • Switch the Evita off. • Remove the CPU 68332 PCB. • Remove the battery from the old CPU 68332 PCB. • Remove the D22 module (EEPROM) from the old CPU 68332 PCB. • Remove the D22 module (EEPROM) from new CPU 68332 PCB. Fig. 19: Component mounting diagram of the CPU PCB (replacing the CPU PCB) • Install the battery in the new CPU 68332 PCB. • Transfer the D22 module from the old CPU 68332 PCB to the new CPU 68332 PCB. • Check the jumper configuration (see old CPU 68332 PCB or, if necessary, the functional description and the component mounting diagram). • Install the new CPU 68332 PCB in the Evita. • Secure the CPU PCB with the screws. • Load the relevant software into the CPU 68332 PCB. • Check the Evita by following the instructions in the Evita Test Certificate. 1 2 X3 1 X12 D22

06/98 Repair Instructions Page 24 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 2.6 Test Possible in DS Mode 2.6.1 Diagnosis Mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.3.2, Diagnosis page “Microprocessor” of “Electronics”, page 70. • EPROM test • RAM test • Data loss • Service connector attached • CAN • Software options 2.6.2 External DS Mode Using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.2.2, Rea- dout of Evita software version, page 125. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.2.4, Error list, page 126. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.2.5, Rea- dout of identification and released options, page 126. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.2.6, Readout of elapsed-time meter, page 127. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.2.7, Inter- nal CAN communication, page 127. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.2, Power pack status, page 140. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.4, CO2 measurement data, page 143. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.5, SpO2 measurement data, page 145. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.6, Horn test, page 147. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.7, Loudspeaker test, page 148. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.10, CPU test, page 149.

06/98 Repair Instructions Page 25 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 2.7 Conversions 2.7.1 Retrofitting of CPU 68332 PCB as per IDM No. 6 • Switch unit off. • Take ESD protection precautions. • Disassemble the CPU 68332 PCB. If the order number 83 06 591 on the adhesive label of the PCB is followed by version number 3.0, the R408 and R409 resistors have to be replaced with 332 ohm resistors (order no. 18 16 144). • Having done that, mark the version number 3.01 using a waterproof pen. • Install printed circuit board. Checking electrical safety is not required. COM1 Test: • Connect PC as for download and call in download, refer to section of "Repair Instructions - Software Change Report, Download and BD32 " chapter 3, Download, page 17. Here only check if connection between the PC and the Evita 4 can be made, i.e. the message “Connected with Evita” will be displayed. • Conduct an equipment check in standby mode. R409 R408

06/98 Repair Instructions Page 26 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 3 Communication PCB (Optional) 3.1 Power supply to the Communication PCB 3.2 Communication PCB Connector Pin Assignment The connectors X1 and X2 are not described in this connector pin assignment. Only a CAN socket and an RS232 socket are specified (the second sockets are comparable). X2 (Power supply only) Pin Assignment Pin Assignment 1c +12 V 8c AGND 2c +24 V 15c DGND 3c +15 V 16c +5 V 4c –15 V X3 (CAN socket) Pin Assignment 1 CON-DET1 (recognition for plugged connector) 2 CANL (external CAN bus) 3 GNDISO-2 (ground for CAN interface) 6 GNDISO-2 (ground for CAN interface) 7 CANH (external CAN bus) CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 27 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X6 (RS232 socket COM2) Pin Assignment 2 RXD-COM2 (RS232 input) 3 TXD-COM2 (RS232 output) 5 GNDISO-1 (ground for RS232 interface) X10 (Background debug mode interface) Pin Assignment 1 GND (ground) 2 BKPT (BREAK input) 3 GND (ground) 4 FREEZE (status signal from 68332) 5 RESETQ (Reset signal) 6 IFETCH (status signal from 68332) 7 +5 V (operating voltage) IPIPE (status signal from 68332) X13 (ISO2 voltage test connector) Pin Assignment 1 +5 V ISO-2 (operating voltage) 3 GND ISO-2 (ground) X14 (Operating voltage test connector) Pin Assignment 1 +5 V 2 GND (ground) 3 +15 V 4 VPP (programming voltage)

06/98 Repair Instructions Page 28 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D If a jumper is plugged onto X50, the voltage regulator of the processor can be switched to 12 V. The board can be programmed without the external signal PROM-EN. X20 (Analog output) Pin Assignment 1 GNDISO-3 (ground) 2 AOUT2 (analog output 2) 3 AOUT1 (analog output 1) X21 (ISO1 voltage test connector) Pin Assignment 1 +5 V ISO-1 (operating voltage) 3 GND ISO-1 (ground) X22 (ISO3 voltage test connector) Pin Assignment 1 +5 V ISO-3 (operating voltage) 3 GND ISO-3 (ground) X50 (PROM-EN test connector) Pin Assignment 1 +5 V (operating voltage) 3 PROM-EN-TEST (input for simulation of PROM-EN)

06/98 Repair Instructions Page 29 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 3.3 Replacing the Communication PCB • Switch the Evita off. • Remove the Communication PCB. • Install the new Communication PCB in the Evita. • Secure the Communication PCB with the screws. • Load the corresponding software into the Communication PCB. • Check the Evita by following the instructions in the Evita Test Certificate. Fig. 20: Component mounting diagram of the Communication PCB X3 X21 X1 X2 X50 X10 X11 X14 X22 X13 U1 U2 U3 X4 X7 X6 X20 D1 1 1 1 1 1 1

06/98 Repair Instructions Page 30 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 3.4 Tests possible in DS mode 3.4.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.3.2, Diagnosis page “Microprocessor” of “Electronics”, page 70. under “RAM-Comm”. 3.4.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.6, “Communication” testing (Communication PCB), page 159.

06/98 Repair Instructions Page 31 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 4 Paediatric Flow PCB Option for Evita 4 as of SW 2.20 4.1 Power Supply to the Paediatric Flow PCB 4.2 Connector Pin Assignment of the Paediatric Flow PCB The connectors X1 and X2 are not considered in this connector pin assignment. X2 (Power supply only) Pin Assignment Pin Assignment 1c +12 V 8c AGND 2c +24 V 15c DGND 3c +15 V 16c +5 V 4c –15 V X3 (Flow sensor) Pin Assignment Pin Assignment 1 Z-Flow-01 4 Z-Flow-07 2 Z-Flow-03 8 Housing 3 Z-Flow-05 15 Housing X4 (Analog voltage test) Pin Assignment Pin Assignment 1 +15 V-A 4 –15 V-A 2 +5/15 V-B 5 AGND 3 +10 V-A CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 32 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X5 (Digital voltage test) Pin Assignment Pin Assignment 1 +5 V 3 DGND X12 (Digital voltage test) Pin Assignment Pin Assignment 1 +5 V-B 3 DGND

06/98 Repair Instructions Page 33 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 4.3 Replacing the Paediatric Flow PCB • Switch the Evita off. • Remove the Paediatric Flow PCB. • Install the new Paediatric Flow PCB in the Evita. • Secure the Paediatric Flow PCB with the screws. • Check the Evita by following the instructions in the Evita Test Certificate. Fig. 21: Component mounting diagram of the Paediatric Flow PCB X3 1 X4 X1 X2 1 1 X12 X5

06/98 Repair Instructions Page 34 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5 CO2 Carrier PCB 5.1 Power Supply to the CO2 Carrier 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 4c –15 V Power supply to the temperature hybrid and to the pressure sensor Pin Assignment Pin Assignment 1 temperature hybrid +10 V-A 1 pressure sensor +10 V-A 4 temperature hybrid AGND2 3 pressure sensor AGND2 CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 35 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5.2 CO2 Carrier PCB Connector Pin Assignment Connectors X1 and X2 are not considered in the following tables. X3 Pin Assignment Pin Assignment 1 +5 V-ISO-1 8 TXD-SpO2 2 GND-ISO-1 9 RXD-SpO2 3 GND-ISO-1 10 CTS-SpO2 4 +15 V-ISO 11 Reset SpO2 5 GND-ISO-1 12 GND-ISO-1 6 –15 V-ISO 13 ECG-SYNC (ISO) 7 –15 V-ISO 14 GND-ISO-1 X4 Pin Assignment Pin Assignment 1 GND-EXT 3 – 2 ECG-SYNC X5 Pin Assignment Pin Assignment 1 GND-ISO-1 3 +15 V-ISO 2 5 V-ISO-1 4 –15 V-ISO1 X8 Pin Assignment Pin Assignment 1 Temperature sensor

06/98 Repair Instructions Page 36 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X9 Pin Assignment Pin Assignment 1 DGND-ISO-2 5 +5 V-ISO-2 2 Reset-CO2 6 – 3 TXD-CO2 7 +5 V 4 RXD-CO2 8 DGND X10 Pin Assignment Pin Assignment 1 +5 V 3 +24 V 2 +12 V X11 Pin Assignment Pin Assignment 1 –15 V 2 +15 V X12 Pin Assignment Pin Assignment 1 DGND 2 AGND Jumper X14 RS232 test CO2 (pin 1–2 normal, 2–3 test) Pin Assignment Pin Assignment 1 X9 Pin 3 3 RXD-CO2 2 TXD-CO2 Test only possible with the CO2 module connected Jumper X15 RS232 test SpO2 (pin 1–2 normal, 2–3 test) Pin Assignment Pin Assignment 1 X3 Pin 8 3 RXD-SPO2

06/98 Repair Instructions Page 37 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 22: Component mounting diagram of the CO2 Carrier PCB 2 TXD-SPO2 Jumper X15 RS232 test SpO2 (pin 1–2 normal, 2–3 test) Pin Assignment Pin Assignment X8 LP CO2-Carrier Best. B1 + — X5 1 X10 1 U4 X12 1 X9 1 X11 1 X4 X3 C12 C13 + + X1 X2 1 X15 1 X14 1 B2 Signal generator Pressure sensor CO2 module SpO2 module (optional) Goldcaps DC/DC converter * Temperature hybrid X3* * X3 and the DC/DC converter are integral parts of the optional SpO2. ** PCB Super gold according to IDM No. 29 (Evita 4 or Evitad 2 dura) **

06/98 Repair Instructions Page 38 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5.3 Replacing the CO2 Carrier PCB • Switch the Evita off. • Remove the CO2 Carrier PCB. • Remove the CO2 module (Power Supply PCB, Processor Board PCB), the SpO2 module (if available), the connector X3, and the DC/DC converter U4 (part of the optional SpO2). • Mount the CO2 module and the SpO2 module (if available), the connector X3, and the DC/DC converter U4 (part of the optional SpO2) on the new CO2 Carrier PCB. • Install the new CO2 Carrier PCB in the Evita. • Secure the CO2 Carrier PCB with the screws. • Check the Evita by following the instructions in the Evita Test Certificate. 5.4 Tests possible in DS mode 5.4.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.3.2, Diagnosis page “Microprocessor” of “Electronics”, page 70.; all displayed voltages are measured on the CO2 Carrier PCB. 5.4.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.1, Testing voltages, page 138. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.2, Power pack status, page 140. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.3, Sen- sors, page 142. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.4, CO2 measurement data, page 143. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.5, SpO2 measurement data, page 145. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.6, Horn test, page 147. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.4.8, Gold- Cap, page 148.

06/98 Repair Instructions Page 39 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5.5 Conversions 5.5.1 Replacing CO2 Carrier PCB According to IDM No. 3 (Evita 4) • Switch unit off. • Observe electrostatic precautions. Use an ESD protection mat and a wrist strap. • Dismantle CO2 Carrier PCB (lowest PCB in the electronics unit). • Replace resistors R82 and R84 with 511 ohms by 332 ohm resistors (order no. 18 16 144). If the resistance of R82 and R84 cannot be identified by the serial number, you can determin the ohmic resistance using a multimeter. It is also possible to determine the ohmic resistance by the colour code. You have to replace the resistors R82 and R84 with the code “green – brown – brown – black – black” or “green – brown – brown – black – red”. • Mark the PCB to be replaced with “IDM 3” on the back. • Assemble the unit ready for operation. • Switch unit on and activate CO2 measurement via “alarm limits” and “monitoring”. • Carry out function check in standby mode after 3 minutes. • Switch to ventilation and call up CO2 real-time curve. • Test plausibility of CO2 real-time curve and etCO2 measured value by breathing through the cuvette. Alternatively, test CO2 measurement according to test items 9 to 9.2 of the Test Certificate. • Check electrical safety following test items 10 to 10.3.1 of the Test Certificate. R 84 R 25 V13 R 78 R 58 R 92 V14 R 27 R 24 U 8 U 9 U 11 R 77 V15 R 28 R 82 R 85

06/98 Repair Instructions Page 40 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5.5.2 Conversion due to Error Message “Ext. Battery reversed poles” IDM No. 2 (Evita 2 dura) or IDM No. 19 (Evita 4) See IDM: 02/99 Lenke No. 29 replaces IDMs Nos. 11/19/22 (Evita 4 or Evita 2 dura)

06/98 Repair Instructions Page 41 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 5.5.3 Conversion for Device Error 02.71.003 IDM No. 2 (Evita 2 dura) or IDM No. 19 (Evita 4) See IDM: 02/99 Lenke No. 29 replaces IDMs Nos. 11/19/22 (Evita 4 or Evita 2 dura)

06/98 Repair Instructions Page 42 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 6 Power Supply PCB (CO2 measurement) 6.1 Power Supply to the Power Supply PCB 6.2 Connector Pin Assignment on the Power Supply PCB J1 Pin Assignment Pin Assignment 1 +5 V 3 – 2 GND J2 (Inputs/outputs for communication between the Evita and the CO2 measurement) Pin Assignment Pin Assignment 1 DGND of the CO2 measurement 7 TTL-TXD (Evita) 2 RXD with RS232 level (PC) 8 TTL-RXD (Evita) 3 TXD with RS232 level (PC) 10 +5 V output (isolated) P2 (Inputs/outputs for communication between the PCBs of the CO2 measurement) Pin Assignment Pin Assignment 1 DGND of the CO2 measurement 7 TTL-TXD (Evita) 2 RXD with RS232 level (PC) 8 TTL-RXD (Evita) 3 TXD with RS232 level (PC) CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 43 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 6.3 Measuring the Voltages on the Power Supply PCB You can measure the output voltages of the Power Supply PCB using one of the following two methods. 6.3.1 Printed Circuit Board on Extender Board • Mount the CO2 Carrier PCB on an extender board. • Measure the voltages at the P4 connector (see connector pin assignment). Fig. 23: Power Supply PCB, soldering side 6.3.2 Printed Circuit Board in the Evita • Insert the CO2 Carrier PCB into the second slot viewed from top. • Remove the cover of the Evita (see “Removing the Power Supply Unit”). • Measure the voltages at the P4 connector (see connector pin assignment). P4 (Power supply outputs and inputs of the switching signals. The outputs are isolated from the connector J1) Pin Assignment Pin Assignment 1 +5 V 5 –15 V 2 +8 V 6 +15 V 3 DGND 7 on/off for the +8.5 V (5 V = on) 4 AGND 8 on/off for the +15 V (5 V = on) P2 1 P4 J1 J2 1 1

06/98 Repair Instructions Page 44 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 6.4 Test Points on the Power Supply PCB All voltages are measured at test point DGND. If the board is removed and the 5 V supply is connected, you cannot measure the voltage at test point 3. If you want to measure the voltage at test point 3, you must install a 1-KΩ resistor between pin 1 and pin 8 of the P4 connector. Fig. 24: Components mounting diagram of the Power Supply PCB Test points (Andros PCB) X6 (Dräger PCB) Test point Assignment Pin Assignment 1 DGND 1 TTL-TXD (not assignd) 2 +15 V ±0,75 V 2 TTL-RXD 3 +15 V ±0,75 V (switched) 3 / 5 +8,5 V ±0,5 V 4 DGND 6 –15 V ±0,75 V 5 +5 V 7 +5 V ±0,25 V 6 8 V-ON-OFF 8 on /off +15 V 7 ON-OFF 9 TTL-RXD 8 +15 V 10 TTL-TXD 9 –15 V 10 +8 V 11 OUT-A 1 1 1 1 TP1 TP5 TP10 TP3 TP2 TP8 TP4 TP6 J1 J2 P2 P4 W1 TP9 TP7 1A 1B 1 1 X1 X3 X5 X2 1 X6 1 Andros PCB Dräger PCB

06/98 Repair Instructions Page 45 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 6.5 Replacing the Power Supply PCB • Switch the Evita off. • Remove the CO2 Carrier PCB. • Remove the screws which secure the Power Supply PCB and remove the Power Supply PCB. • Mount the new Power Supply PCB on the CO2 Carrier PCB. • Install the CO2 Carrier PCB in the Evita. • Secure the CO2 Carrier PCB with the screws. • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate.

06/98 Repair Instructions Page 46 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 7 Processor Board PCB (CO2 measurement) 7.1 Power Supply to the Processor Board PCB The Processor Board PCB is powered from the Power Supply PCB. The J4 connector of the Processor Board PCB and the P4 connector of the Power Supply PCB are directly interconnected. The power supply must be measured at the P4 connector of the Power Supply PCB (see “Power Supply PCB”). 7.2 Connector Pin Assignment of the Processor Board PCB J4 Pin Assignment Pin Assignment 1 +5 V 5 –15 V 2 +8.5 V 6 +15 V 3 DGND 7 on/off for +8.5 V 4 AGND 8 on/off for +15 V J2 (Inputs/outputs for communication between the PCBs of the CO2 measurement) Pin Assignment Pin Assignment 1 DGND of the CO2 measurement 7 TTL-TXD (Evita) 2 RXD with RS232 level (PC) 8 TTL-RXD (Evita) 3 TXD with RS232 level (PC) CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 47 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 25: Components mounting diagram of the Processor Board PCB J1 (Connection to the sensor) Pin Assignment Pin Assignment 1 AGND 6 DGND 2 MUX (measuring signal from the multiplexer in the sensor) 7 +8.5 V 3 Shield 8 Data (serial data connection between the CPU and the sensor) 4 –15V 9 Clock for synchronization 5 +15 V Dräger PCB X10 = open X11= closed X12 = open X13= open X14= open X17= 2 - 3 closed X18= open X19 = closed X20= closed X21= 2-3 closed X22= open X23= open Andros PCB W3 = open W4= open W5 = open W6= closed W7= closed W8= 2 - 3 W9= 1 - 2 (if applicable) W10 = A centre (if applicable) 1 1 J1 J4 W5 W6 W7 W8 J2 W10 W3 W4 W9 1 A 1 1 1 1 1 1 X1 X4 X18 X19 X20 X17 X6 X2 X21 X22 X23 X10 X12 X14 X13 X11 1 1 1

06/98 Repair Instructions Page 48 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 7.3 Replacing the Processor Board PCB • Switch the Evita off. • Remove the CO2 Carrier PCB. • Remove the screws which secure the Processor Board PCB and remove the Processor Board PCB. • Check the jumper configuration (see old Processor Board PCB or functional description and components layout diagram, if necessary). • Mount the new Processor Board PCB on the CO2 Carrier PCB. • Install the CO2 Carrier PCB in the Evita. • Secure the CO2 Carrier PCB with the screws. • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate.

06/98 Repair Instructions Page 49 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 8 CO2 Measurement 8.1 Fault Diagnosis Chart 1 2 3 4 5 6 7 8 Fehlersuche CO2e The voltages +15 V and +8,5 V are switched by the Processor PCB. Measure the voltages on the Power Supply PCB. CO2 measurement is faulty. Is a second sensor available? Connect the sensor. Is CO2-measurement o.k? Sensor is defective. Remove the CO2 connector from the socket. Measure the voltages at the socket. Is the lamp in the sensor illuminated? Does the sensor become warm? Sensor is defective. Are the voltages present? Are the voltages present? Break (Power Supply PCB / socket). Sensor defective. Test the Power Supply PCB (see Power Supply PCB). Yes No Measure the voltages on the Power Supply PCB (see Power Supply PCB). Yes Yes Yes Yes Yes No No No No 1 MUX 2 A GND 3 +15 V ±0,75 V 4 D GND (+8,5 V) 5 +8,5 V ±0,5 V 6 Date 7 Clock 8 –15 V ±0,75 V No

06/98 Repair Instructions Page 50 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 8.2 CO2 Sensor The CO2 sensor can only be repaired in the Lübeck workshop. The lamp in the CO2 sensor has an estimated service life of approx. 40,000 hours (about 4 1/2 years of continuous operation). The service life might be reduced if the sensor is dropped or exposed to strong vibrations. A span-check filter is located in the CO2 sensor cable. This span-check filter is specifically adapted to the relevant CO2 sensor. If you have to replace it with a new span-check filter, you must re-adapt the new span-check filter to the CO2 sensor. Follow these instructions to adapt the new filter: • Calibrate the CO2 sensor with test gas. • Insert the span-check filter into the cuvette. • Read out the CO2 value. • Attach a new clip to the span-check filter whose value is closest to the measured value. A set of clips can be ordered separately.

06/98 Repair Instructions Page 51 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 9 SpO2 Module (Optional) Fig. 26: Component mounting diagram of the optional SpO2 module The optional SpO2 function includes the following parts: • SpO2 module with connecting cable for X3. • DC/DC converter U4 on the CO2 Carrier PCB. • Connector X3 on the CO2 Carrier PCB. ROM

06/98 Repair Instructions Page 52 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 10 Graphics Controller PCB Evita 4 10.1 Power Supply to the Graphics Controller PCB 10.2 Connector Pin Assignment of the Graphics Controller PCB X1 (Sub D connector – power supply only) Pin Assignment Pin Assignment 1 +24 V 2 GND X1 (Sub D connector) Pin Assignment Pin Assignment 1 +24 V 9 LS1 (loudspeaker connection +) 2 GND 10 LS2 (loudspeaker connection –) 4 PROM_EN (enable for the programming voltage) X2 (Touch) Pin Assignment Pin Assignment 1 +5 V 5 RXD 2 GND 8 GND 3 GND 9 DIMPWM (signal to dim the inverter) 4 TXD 10 +5 V (operating voltage for the optocouplers) CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 53 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X4 (Display signal) Pin Assignment Pin Assignment 1 GND 25 GND 22 HSYNCH (horizontal synchronization) 26 GND 23 GND 28 +5 V 24 VSYNCH (vertical synchronization) 32 +12 V X7 (Display power) Pin Assignment Pin Assignment 1 +12 V 5 DIMPWM (signal to dim the inverter) 2 GND 7 +5 V 3 +24 V X10 (Background debug mode interface) Pin Assignment Pin Assignment 1 GND 5 RESETQ (reset signal) 2 BKPT (break input) 6 IFETCH (status signal from 68332) 3 GND 7 +5 V 4 FREEZE (status signal from 68332) 8 IPIPE (status signal from 68332) X14 (Membrane keyboard) Pin Assignment Pin Assignment 23 GND 27 BUTTON (button of the control knob) 24 +5 V 28 ALARMLED (anode of the alarm LEDs) 25 KN1 (signal 1 from the control knob) 31 LS1 (speaker connection +)

06/98 Repair Instructions Page 54 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 26 KN2 (signal 2 from the control knob) 32 LS2 (speaker connection –) X5, X15 (Jumper) Pin Assignment No function assigned X20 (Jumper) Pin Assignment 1 +5 V 2 PROM-ENX (signal for burning of the flash EPROMs) X14 (Membrane keyboard) (Forts.) Pin Assignment Pin Assignment

06/98 Repair Instructions Page 55 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 27: Components mounting diagram of the Graphics Controller PCB D1 D19 D29 X1 X14 X2 X4 1 1 1 X5 X15 1 1 X10 1 2 V40 V46 V38 V39 L50 X7 1 1 8 D40 1 X20

06/98 Repair Instructions Page 56 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 28: Soldering side of the Graphics Controller PCB X1 1 8 X14 X2 X4 1 1 1 X7 1

06/98 Repair Instructions Page 57 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 10.3 Replacing the Graphics Controller PCB • Switch the Evita 4 off. • Open the control unit. • Remove the plug-in connection to the electronics. • Remove the two hexagon head cap screws at the rear of the control unit. Fig. 29: Rear view of the control unit – dismounting the Graphics Controller PCB • Remove the six Phillips screws on the Graphics Controller PCB. Fig. 30: Soldering side of the Graphics Controller PCB – dismounting the board X1 1 8 X14 X2 X4 1 1 1 X7 1

06/98 Repair Instructions Page 58 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • Remove the plug-in connectors from the Graphics Controller PCB. • Remove the Graphics Controller PCB. • Remove D29 and D40 from the old Graphics Controller PCB. • Mount D29 and D40 onto the new Graphics Controller PCB. • Mount the new Graphics Controller PCB by following the reverse method for dismounting. • Load the corresponding software into the Graphics Controller PCB. • Check the Evita 4 by following the instructions in the Evita 4 Test Certificate. 10.4 Tests possible in DS mode 10.4.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.2.1, Diagnosis page “Microprocessor” of “Front”, page 64. 10.4.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.5, Testing “Front panel”, page 150.

06/98 Repair Instructions Page 59 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 11 Display with DC/AC converter for backlighting Evita 4 Three different displays are used in teh Evita 4. The backlighting differs from version to version Version 1 from Toshiba (as of 1995): • Identifier: External DC/AC converter for 2 lamps. Version 2 from NEC (as of 1996): • Identifier: Internal DC/AC converter for 1 lamp. Version 3 from Sharp (as of 1996): • Identifier: External DC/AC converter for 2 lamps. Version 0 from Toshiba (as of 1997): • Identifier: External DC/AC converter for 2 lamps. • Pre-requesite: Software 2.20, or Software 1.07 (Japan only), or Software 1.08 (U.S.A. only). CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules. ATTENTION The screen goes blank if the backlighting fails

06/98 Repair Instructions Page 60 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 11.1 Power Supply to the Display 11.2 Connector Pin Assignment of the Display X7 (Graphics Controller PCB) Pin Assignment Pin Assignment 1 +12 V 5 DIMPWM (signal to dim the inverter) 2 GND 7 +5 V 3 +24 V X4 (Graphics Controller PCB) Pin Assignment Pin Assignment 1 GND 25 GND 20 BLANK (blanking signal) 26 GND 22 HSYNCH (horizontal synchronization, not in every display type) 28 +5 V 23 GND 32 +12 V 24 VSYNCH (vertical synchronization, not in every display type)

06/98 Repair Instructions Page 61 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 11.3 Replacing the Display Example: Toshiba display; replacement is similar for other versions. • Switch the Evita 4 off. • Open the control unit. • Remove the four distance pins A (or nuts, in newer versions). Fig. 31: Dismounting the display (step 1) A A A A

06/98 Repair Instructions Page 62 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • Remove the four angles B (not available in newer versions). • Unsolder the connection C (replaced by plug-in connectors in newer versions) from the backlighting. Fig. 32: Dismounting the display (step 2) • Remove the display. • Mount the display by following the reverse method used for dismounting. • Replace D29 and D40 on the Graphics Controller PCB (see “Replacing the Graphics Controller PCB”). D29 and D40 are included in the Display conversion kit. • Check the Evita 4 by following the instructions in the Evita 4 Test Certificate. B B B B C C C CAUTION Dust particles obstruct the display view. Wipe the display and the window with a dust-free cloth before mounting the display. Do not use cleaning agents containing alcohol as these could destroy both display and window. CAUTION Alcoholic cleaning agents may damage the display and the window. DO NOT use alcoholic cleaning agents to clean the display or the window.

06/98 Repair Instructions Page 63 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 11.4 Testing DC/AC converter for backlighting The DC/AC converter is to be checked if the entire backlighting fails (=screen blank) and the display responds to servic ecommands refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.5.6, Testing of display, page 157. This converter supplies the lamp (NEC display) or the two lamps (Toshiba or Sharp display) with an AC voltage of approx. 400 V and 50 kHz. When measuring the voltage with a voltmeter, the voltmeter represents a short circuit for the converter and the voltage collapses. The following test is easy to implement: Use a screwdriver to create a spark gap at the lamp connections. 11.5 Tests possible in DS mode 11.5.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.2.1, Diagnosis page “Microprocessor” of “Front”, page 64. This is only possible if display and backlighting are functioning; if not, refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.5.6, Testing of display, page 157. 11.5.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.5.6, Testing of display, page 157. CAUTION Touching the output contacts of the DC/AC converter results in minor burns (HF surgery) and can prove extremely unpleasant.

06/98 Repair Instructions Page 64 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 12 Backlighting Evita 4 Different displays are used in the Evita. 12.1 Toshiba Display (1995 or later), Version 1 12.1.1 Power Supply to the Backlighting Fig. 33: DC/AC converter with power supply CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules. IMPORTANT The screen goes blank if the backlighting fails.. To the Graphics Controller PCB, connector X7 To the backlighting black red

06/98 Repair Instructions Page 65 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 34: DC/AC converter board (in newer versions) 12.1.2 Replacing the Backlighting The order number of the backlighting assembly is related to the specific type of display. Please check which type of display you have before ordering a new backlighting assembly. • Switch the Evita 4 off. • Open the control unit. • Remove the display from the control unit. • Remove the four screws (see Fig. below). Fig. 35: Display (dismounted) • Remove the backlighting, along with the light fixture. To the backlighting green black red Display (glass pane)

06/98 Repair Instructions Page 66 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • Mount the new light fixture by following the reverse method used for dismounting. • Check the Evita 4 by following the instructions in the Evita 4 Test Certificate. 12.2 NEC Display (1996 or later), Version 2 NEC display characteristics: • Display with integrated DC/DC transformer with one lamp for backlighting. The lamp can be replaced after dismounting the display. 12.3 Sharp Display (1996 or later), Version 3 • Display with external DC/DC transformer with two lamps for backlighting. The lamps can be replaced after dismounting the display. 12.4 Toshiba Display (1997 or later), Version 0 Toshiba display characteristics: • Display with external DC/DC transformer with two lamps for backlighting. The lamps can be replaced after dismounting the display. IMPORTANT Dust particles may affect the view on the display. Before mounting the display, clean the display and the window with a lint-free cloth. CAUTION Alcoholic cleaning agents may damage the display and the window. DO NOT use alcoholic cleaning agents to clean the display or the window.

06/98 Repair Instructions Page 67 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 13 Touchscreen/Window Evita 4 13.1 Power Supply to the Touchscreens X2 (Graphics Controller PCB) Pin Assignment Pin Assignment 1 +5 V 5 RXD 2 GND 8 GND 3 GND 9 DIMPWM (signal to dim the inverter) 4 TXD 10 +5 V (operating voltage for the optocouplers) CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules.

06/98 Repair Instructions Page 68 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 13.2 Replacing the Touchframe • Switch the Evita 4 off. • Open the control unit. • Remove the display. • Remove the four distance pins. Fig. 36: Touchscreen • Remove the touchscreen. • Mount the touchscreen by following the reverse method used for dismounting. • Check the Evita 4 by following the instructions in the Evita 4 Test Certificate. IMPORTANT Dust particles may affect the view on the display. Before mounting the display, clean the display and the window with a lint-free cloth. CAUTION Alcoholic cleaning agents may damage the display and the window. DO NOT use alcoholic cleaning agents to clean the display or the window.

06/98 Repair Instructions Page 69 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 13.3 Tests possible in DS mode 13.3.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.2, “Front” diagnosis, page 64. under IR-touch 13.3.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.5.5, Testing of touchscreen, page 155. 13.4 Replacing the Window • Switch the Evita 4 off. • Open the control unit. • Remove the display. • Remove the touchframe. • Remove the window. Fig. 37: Window

06/98 Repair Instructions Page 70 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • Mount the window by following the reverse method used for dismounting. • Check the Evita 4 by following the instructions in the Evita 4 Test Certificate. IMPORTANT Dust particles may affect the view on the display. Before mounting the display, clean the display and the window with a lint-free cloth. CAUTION Alcoholic cleaning agents may damage the display and the window. DO NOT use alcoholic cleaning agents to clean the display or the window.

06/98 Repair Instructions Page 71 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 14 7-Segment PCB Evita 2 dura 14.1 Voltage Supply to the 7-Segment PCB 14.1.1 X1 Connector on the 7-Segment PCB 14.2 7-Segment PCB Repair Information – No entries – Pin Assignment 32/34 +5 V 27/29/31/33 GND 26/28/30 ULED +3 V to +5 V (LEDs dark or bright, selectable with the “bright/dark” key)

06/98 Repair Instructions Page 72 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 14.3 7-Segment PCB Component Layout Diagram Fig. 38: 7-Segment PCB assembly D43 D53 D54 D63 D45 D62 D44 D52 D61 D68 D51 D50 D58 D59 D48 D47 D56 D55 D60 D67 D66 D65 D64 D57 D42 D41 D40 D39 D38 D37 D36 D35 D34 X1 D1 D2 D3 D10D11D12 D19D20 D21 D28D29D30 D31D32D33 D22D23D24 D13D14D15 D4 D5 D6 D7 D8 D9 D16D17D18 D25D26D27 1

06/98 Repair Instructions Page 73 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 15 Frontpanel PCB Evita 2 dura 15.1 Voltage Supply to the Frontpanel PCB 15.1.1 X1 Connector on the Frontpanel PCB to the Electronics 15.2 Voltage Supply to Peripheral Equipment 15.2.1 X2 Connector on the Frontpanel PCB to the 7-Segment PCB 15.2.2 X3 Connector on the Frontpanel PCB to the Membrane Keyboard Pin Assignment 1 +24 V 2 AGND 3/11 +5 V 7/14 GND Pin Assignment 26/28/30 ULED +3 V to +5 V (LEDs dark or bright, selectable with the “bright/dark” key) 27/29/31/33 GND 32/34 +5 V Pin Assignment 1/2/3/4 +5 V 33/37 +24 V (via 2 resistors of 1 KΩ each)

06/98 Repair Instructions Page 74 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 15.2.3 X5 Connector on the Frontpanel PCB to the Control Knob 15.2.4 X7 Connector on the Frontpanel PCB to the display 15.2.5 X9 Connector on the Frontpanel PCB to the DC/AC Transformer 15.3 Front Panel PCB Repair Information • Decoder D48 (only present in colour display option) should be taken from the old Frontpanel PCB and mounted on the new Frontpanel PCB. • After replacing a printed circuit board, download the respective software into the Frontpanel PCB. Pin Assignment 1/2 GND 6 +5 V Pin Assignment 8/10/12/14/16/1 8/20/22 GND 24/26 UBKL +13 V (display operating voltage, delayed when switching on the Evita 2 dura) 28/30 +5 V 32 –UK –32 V to –35 V, depending on contrast setting of the display 34 +UK +32 V to +35 V, depending on contrast setting of the display Pin Assignment 1 +24 V 4 +5 V 5 UBKL 7 GND

06/98 Repair Instructions Page 75 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 15.4 Frontpanel PCB Component Layout Diagram Fig. 39: Frontpanel PCB assembly X2 X1 X7 X9 D100 D20 D17 X14 X13 X6 1 1 1 1 1 1 1 1 1 1 1 1 X5 X3 X4 X11 X10 D1 X20 1 GND UBKL –UK +UK +5V +12V +24V D48 *Decoder D48 only available in the optional colour display. 83 09 124 for NEC display 83 09 176 for Sharp display

06/98 Repair Instructions Page 76 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 16 Pneumatics Controller PCB 16.1 Power Supply to the Pneumatics Controller PCB 16.2 Connector Pin Assignment of the Pneumatics Controller PCB X1 Pin Assignment Pin Assignment 6c +15 V 11c AGND 7c –15 V 12c DGND 8c +24 V 14c +5 V X2 (Background debug mode interface) Pin Assignment Pin Assignment 1 DGND 5 RESQ 2 BKPT 6 IFETCH 3 DGND 7 +5 V 4 FREEZE 8 IPIPE CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules. CAUTION Risk of burns when operating the system with the rear panel (heat sink) disassembled. Do not operate the system for longer periods of time with the rear panel disassembled.

06/98 Repair Instructions Page 77 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X3 (Test points) Pin Assignment Pin Assignment 1 +5 V-A 5 +15 V-A 2 –5 V-A 6 +10 V-A 3 –15 V-A 7 AGND 4 +15 V-C X4 (Flow sensor) Pin Assignment Pin Assignment 1 FGND 5 H-DR-OUT2 2 R-121-OUT 6 U-SENSOR 3 K-DR-OUT 7 H-DR-OUT1 4 R-15-OUT X5 (PEEP/PIP valve) Pin Assignment Pin Assignment 1 5 V-B 2 PEEP-OUT X6 (O2 sensor) Pin Assignment Pin Assignment 1 +15 V-B 3 O2-IN 2 AGND 4 –15 V-A X7 (Inspiration/expiration pressure sensor) Pin Assignment Pin Assignment 1 AGND 3 PEXP 2 PINSP 4 +15 V-F

06/98 Repair Instructions Page 78 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X8 (Inspiration/expiration pressure sensor) Pin Assignment Pin Assignment 1 AGND 3 PEXP 2 PINSP 4 +15 V-E X9 (Oesophagus/pressure aux pressure sensor) Pin Assignment Pin Assignment 1 AGND 3 PAUX 2 POESO 4 +15 V-D X10 (Pressure aux/oesophagus pressure sensor) Pin Assignment Pin Assignment 1 AGND 3 PEXSP 2 PINSP 4 +15 V-G X11 (Test points) Pin Assignment Pin Assignment 1 DGND 3 +5 V 2 – X12 (Flow sensor switch) Pin Assignment Pin Assignment 1 FLOWS-POS 2 DGND X13 (Fan and heating) Pin Assignment Pin Assignment 1 +24 V-A 2 AGND

06/98 Repair Instructions Page 79 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X15 (PEEP valve current test points) Pin Assignment Pin Assignment 1 AGND 2 IPEEP X17 (Airway pressure signals test points) Pin Assignment Pin Assignment 1 POESO 4 PAUX 2 PEXP 5 AGND 3 PINSP X18 (ADC test point) Pin Assignment Pin Assignment 1 ADCSIG 2 AGND X19 (Test points) Pin Assignment Pin Assignment 1 O2-IN 6 P-O2 2 –15 V-B 7 AGND 3 +15 V-B 8 F-SIG 4 AGND 9 F-O 5 P-AIR 10 F-INOP X20 (Flash EPROM programming voltage test points) Pin Assignment Pin Assignment 1 DGND 2 VPP

06/98 Repair Instructions Page 80 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X21 (Test points) Pin Assignment Pin Assignment 1 +24 V-A 2 AGND X24 (CAN terminating resistor jumper) Pin Assignment Pin Assignment 1 CAN-H 2–3 CAN-L-121R X30 (O2/AIR solenoid valve) Pin Assignment Pin Assignment 1 V0 2 +24 V-A X31 (Nebulizer solenoid valve) Pin Assignment Pin Assignment 1 V1 2 +24 V-A X32 (Venting solenoid valve) Pin Assignment Pin Assignment 1 V2 2 +24 V-A X33 (Pressure sensor calibration inspiration solenoid valve) Pin Assignment Pin Assignment 1 V3 2 +24 V-A X34 (Pressure sensor calibration expiration solenoid valve) Pin Assignment Pin Assignment 1 V4 2 +24 V-A

06/98 Repair Instructions Page 81 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D X35 (O2 calibration solenoid valve) Pin Assignment Pin Assignment 1 V5 2 +24 V-A X36 (Spare for extension) Pin Assignment Pin Assignment 1 V6 2 +24 V-A X37 (Spare for extension) Pin Assignment Pin Assignment 1 V7 2 +24 V-A X38 (Spare for extension) Pin Assignment Pin Assignment 1 V8 2 +24 V-A X39 (Spare for extension) Pin Assignment Pin Assignment 1 V9 2 +24 V-A

06/98 Repair Instructions Page 82 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 40: Component mounting diagram of the Pneumatics Controller PCB X1 V12 V17 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 X11 X24 X13 X21 X12 1 D17 D18 G2 D6 X22 X2 X6 X19 X20 X18 N2 D20 X7 X8 X9 X15 X5 X17 X3 X4 X30 X31 X32 X33 X34 X35 X36 X37 X38 X39 X10 X30 X31 X32 X33 X37 X36 X35 X34 X38 X39

06/98 Repair Instructions Page 83 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 41: Pneumatics Controller PCB connector configuration X8 X7 X9 X10 X6 X4 X5 X12 X30 X31 X32 X33 X34 X35 X36 X37 X38 X39 X13 PEEP valve Flow sensor Inspiration/Expiration pressure sensor Inspiration/Expiration pressure sensor O2 sensor Patient system heating HPSV cable harness Pneumatics cable harness O2/AIR selector Nebulizer Venting Flow sensor switch O2 sensor calibration Pressure sensor Pressure sensor Flow sensor (Option) HPSV HPSV Solenoid valve (gas connection) Inspiration pressure sensor calibration Barrier with cable gland Expiration pressure sensor Solenoid valves (pressure measurement block), flow sensor switch, PEEP valve Connectors X8 and X7 are identical. Coding takes place via the sensors.

06/98 Repair Instructions Page 84 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 16.3 Replacing the Pneumatics Controller PCB • Switch the Evita off. • Fold up the electronics assembly (see “Opening the Evita 4”). • Remove the three Phillips screws C. • Loosen the six Phillips screws B. Fig. 42: Rear view (rear panel fitted) • Remove the rear panel A. • Note down the location of the plug-in connectors of the Pneumatics Controller PCB. • Remove the plug-in connectors from the Pneumatics Controller PCB. • Remove the Pneumatics Controller PCB. Fig. 43: Rear view (rear panel removed) LP HPSV-Ansteuerung LP Pneumatikansteuerung LP HPSV-Ansteuerung A B B B B B B C HPSV-Controller AIR PCB HPSV-Controller O2 PCB Pneumatics-Controller PCB AIR O2

06/98 Repair Instructions Page 85 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D • Mount the new Pneumatics Controller PCB by following the reverse method used for dismounting. • Load the relevant software into the Pneumatics Controller PCB. • Mount the rear panel. • Calibrate the PEEP valve (see “Calibrating the PEEP Valve”). • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate. 16.4 Tests possible in DS mode 16.4.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.4, “Pneumatic” diagnosis, page 74. 16.4.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.1, Valve switching, page 128. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.2, Mixer, page 129. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.3, Setpoint input for PEEP valve, page 129. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.4, Sen- sors, page 130. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.5, Voltages, page 134. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.6, Cali- bration, page 136. refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.7, CPU, page 137.

06/98 Repair Instructions Page 86 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 17 HPSV Controller PCB 17.1 Power Supply to the HPSV Controller PCB X1 Pin Assignment Pin Assignment 5c +12 V 11c AGND 6c +15 V 12c DGND 7c –15 V 14c +5 V CAUTION Electrostatic discharge can damage electronic components. Use an ESD protection mat and a wrist strap when handling electronic modules. CAUTION Risk of burns when operating the system with the rear panel (heat sink) disassembled. Do not operate the system for longer periods of time with the rear panel disassembled.

06/98 Repair Instructions Page 87 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D Fig. 44: Component mounting diagram of the HPSV Controller PCB X1 V14 V13 X3 X20 R8 X9 X7 U1 R95 R96 M1 D5 D1 G1 X14 X6 X8 X13 X10 X11 X12 1 1 1 1 1 1 1 1 1 C49 C52

06/98 Repair Instructions Page 88 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 17.2 Replacing the HPSV Controller O2/AIR PCB • Switch the Evita off. • Remove the Phillips screws A. • Loosen the Phillips screws B. Fig. 45: Rear view (rear panel fitted) • Remove the rear panel. • Remove the HPSV Controller PCB. Fig. 46: Rear view (rear panel removed) • Mount the new HPSV Controller PCB by following the reverse method used for dismounting. • Check the Evita by following the instructions in the Evita 4/Evita 2 dura Test Certificate. LP HPSV-Ansteuerung LP Pneumatikansteuerung LP HPSV-Ansteuerung B B B B B B A HPSV-Controller AIR PCB HPSV-Controller O2 PCB Pneumatics-Controller PCB AIR O2

06/98 Repair Instructions Page 89 For internal use only. Copyright reserved. GBR5664500T055664800.fm 18.03.99 Dräger Medizintechnik D 17.3 Notes Relating to Trouble Shooting refer to "Repair Instructions - Pneumatic Components chapter 4.4, Troubleshooting in Mixer, page 17. 17.4 Tests possible in DS mode 17.4.1 Diagnosis mode refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 3.4.1, Diagnosis page “Valves” of “Pneumatics”, page 74. 17.4.2 External DS mode using PC refer to section of "Repair Instructions - Service No./ Modi, Error list" chapter 9.3.2, Mixer, page 129.