Processor Assembly - Dräger Narkomed 2B Service Manual

NM2B
4.26

Processor Assembly

The processor assembly is located within the monitor box. Access to the
processor requires removal of the monitor box top shelf. Figure 4-26 shows the
processor assembly mounting arrangement and its connections.
4.26.1
CAUTION:
4.26.2
4.26.3
4.26.4
4.26.5
4.26.6
4.26.7
4.26.8
4.26.9
4.26.10 Connect the cables that were previously removed from J1 thru J10 on
Rev. A
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REPLACEMENT PROCEDURES (continued)
Set the System Power switch to STANDBY and remove AC power
from the machine.
Use ESD protection when servicing any of the assemblies inside
the monitor box. It is also recommended that the AC line cord be
plugged into a test fixture which maintains the electrical service
ground connection to the machine while isolating the line and
neutral conductors.
Disable the three circuit breakers at the back of the monitor box by
pulling out each button with a knife or sharp object.
Remove the screws holding the monitor box top shelf. Lift the back
of the shelf and disconnect its ground wire from the chassis ground
tab, then lift out the shelf.
On the power supply assembly, disconnect the AC power cable at J1,
and disconnect the battery power cable at J7.
Disconnect the following cables from the processor assembly:
J5 Power
J6 Data
J7 Alarm
J8 Alarm
J3 CRT
Carefully disconnect the tubing at the right-angle fitting on the
baromed sensor line. Be careful not to bend or crimp the hose barb.
Loosen the four captive mounting screws on the baseplate of the
processor assembly.
Lift the front of the processor assembly first, and then lift the
assembly out of the monitor box.
Position the replacement assembly in the monitor box and tighten the
captive mounting screws.
the processor assembly.
4-89
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J4 CRT
J1 Keypad
J2 Keypad
J9 Spiromed Sensor
J10 O Sensor
2