5664.500/800 Evita 4/Evita 2 dura 06/98 Repair Instructions Page 49
For internal use only. Copyright reserved.
GBR5664500T055664800.fm 18.03.99
Dräger Medizintechnik
D
8CO
2
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.
CO
2
measurement is faulty.
Is a second
sensor
available?
Connect the
sensor.
Is CO
2
-measurement
o.k?
Sensor is defective.
Remove the CO
2
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
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