Service manual

Radical Signal Extraction Pulse Oximeter Service Manual
UM10029–0406
5-7
5.3.3. The troubleshooting steps below are presented in order of the
most probable cause first. Proceed to the next step only if the
unit continues to fail.
Symptom Cause and Corrective Action
Steps
• Speaker Alarming (very
loud) and unit is not
functioning or displaying.
• Probable Watchdog error.
1. Replace System board.
2. Replace User Interface board.
• Alarm LED does not
Illuminate
1. Unit must be in alarm state.
2. Audible alarm can be heard.
1. Replace User Interface board.
2. Replace Display board.
• Alarm Condition But No
Audible Indication.
1. Unit is in alarm condition.
1. Replace Speaker.
2. Replace System board.
• Display Missing Segments
1. Replace User Interface board.
2. Replace Display board.
• Button Function Error
1. Any front panel button
Affected.
2. Buttons do not activate
feature.
1. Replace Keypad.
2. Replace User Interface board.
• "No Sen", or “Sen Off”
Displayed.
1. Cable is connected with
sensor attached.
1. Replace sensor.
2. Replace patient cable.
3. Replace flex cable.
4. Replace oximeter board.
• Unit Will Not Turn Off
1. Replace Keypad.
2. Replace System board.
If unable to repair unit, then please call [phone] option #2 to arrange for
return to Masimo Corporation.