Display/Alarms; Table 7: Display/Alarms Problems - Nellcor OxiMax N-595 Service Manual

Display/Alarms

N-595
Table 7 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 63.

Table 7: Display/Alarms Problems

Symptom
Display values are
missing or erratic.
Display pixels do not
light.
Alarm sounds for no
apparent reason.
Alarm does not sound.
Recommended Action
• If the OXIMAX sensor is connected, replace the
pulse oximetry cable.
• If the condition persists, replace the OXIMAX
sensor.
• If the condition still persists, replace the User
Interface printed circuit board. See User Interface
PCB Removal/Replacement on page 76.
• Check the connection between the User Interface
PCB and the Display PCB.
• If the condition does not change, replace the
Display PCB. See Display PCB Removal/
Replacement on page 74.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB Removal/
Replacement on page 76.
• Moisture or spilled liquids can cause an alarm to
sound. Allow the monitor to dry thoroughly before
using.
• If the condition persists, replace the User Interface
PCB. See User Interface PCB Removal/
Replacement on page 76.
• Check alarm silence status.
• Check speaker connection.
• Replace the speaker as described in Alarm
Speaker Removal/Replacement on page 78.
• If the condition persists, replace the User Interface
PCB. See User Interface PCB Removal/
Replacement on page 76.
Troubleshooting
55