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

Troubleshooting

Display/Alarms

46
Table 7 on page 46 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 51.

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 sensor is connected, replace the pulse
oximetry cable.
• If the condition persists, replace the sensor.
• If the condition still persists, replace the User
Interface printed circuit board. See User Interface
PCB Removal/Replacement on page 64.
• 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 62.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB Removal/
Replacement on page 64.
• 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 64.
• Check alarm silence status.
• Check speaker connection.
• Replace the speaker as described in Alarm
Speaker Removal/Replacement on page 66.
• If the condition persists, replace the User
Interface PCB. See User Interface PCB Removal/
Replacement on page 64.