Covidien Nellcor OxiMax N-560, Service Manual

Page: 57 / 158

Troubleshooting
N-560 Service Manual 47
Display/Alarms
Table 8 lists symptoms of problems relating to non-functioning displays and
audible tones or alarms and recommended actions. If the action requires
replacement of a PCB or module, refer to
Disassembly Guide
on page 53.
Table 8: Display/Alarms Problems
Symptom Recommended Action
Display values are
missing or erratic.
Try another sensor or relocate the sensor.
Replace the Sensor Extension Cable.
Replace the sensor.
Replace the Front Panel PCB. See
Front Case
Disassembly on page 57.
Not all display segments
light during POST.
Check the connection between the Front Panel PCB
and the Main PCB.
Replace the Front Panel PCB. See
Front Case
Disassembly on page 57.
All Front Panel LED
indicators do not light
during POST
Check the connection between the Front Panel PCB
and the Main PCB.
Replace the front case. See
Front Case Disassembly
on page 57.
Alarm sounds for no
apparent reason.
Moisture or spilled liquid can cause an alarm to sound.
Allow the N-560 to dry thoroughly before use.
Replace the Front Panel PCB as described in
Front
Case Disassembly on page 57.
Display is flashing, but
there is no alarm.
Verify that alarm silence has not been activated. See
Menu Item 12 (Silence Alarms) on page 40.
Check speaker connection to Front Panel PCB. Refer
to Front Case Disassembly on page 57.
Replace the speaker. Refer to Front Case Disassembly
on page 57.
Replace the Front Panel PCB. Refer to
Front Case
Disassembly on page 57.