Philips Respironics Wallaby II
Philips Healthcare · Model Respironics Wallaby II
Fiberoptic Phototherapy Blanket Wallaby devices use a flexible long, flat fluorescent panel attached to the main unit by a short connector. The earlier Wallaby (model MD-1000) was replaced by the Wallaby II (model MD-2000), which has two levels of illumination controlled by a rocker switch on the front panel, and a second bulb which the clinician can swing into place using a panel-mounted pushbutton when the first bulb burns out (the Wallaby also has a spare bulb, but the housing must be removed to install it).
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Low or uneven phototherapy irradiance
HighSymptoms: Measured spectral irradiance below target at the pad, uneven output, slow bilirubin response.
Root cause: Light source (halogen / fibre) aging, a damaged fibre-optic pad / cable, or a dirty output surface.
Lamp / light-source failure
MediumSymptoms: No or dim light at the pad, lamp warning.
Root cause: Lamp at end of life or a driver fault.
Fibre-optic pad / cable fault
MediumSymptoms: Dark spots on the pad, reduced output, visible fibre damage.
Root cause: Broken fibres from flexing or crushing.
Cooling fan / thermal fault
MediumSymptoms: Unit shuts down after a period, over-temperature warning.
Root cause: Failed or blocked cooling fan.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Light-source lamp
Class Frequent wear itemRel. cost $$R&R Fairly easy
Fibre-optic pad
Class Frequent wear itemRel. cost $$$R&R Easy
Fibre-optic cable
Class Periodic replacementRel. cost $$R&R Fairly easy
Lamp driver / power supply
Class Major service partRel. cost $$R&R Moderate
Cooling fan
Class Periodic replacementRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Light-source lamp | Frequent wear item | $$ | Fairly easy |
| Fibre-optic pad | Frequent wear item | $$$ | Easy |
| Fibre-optic cable | Periodic replacement | $$ | Fairly easy |
| Lamp driver / power supply | Major service part | $$ | Moderate |
| Cooling fan | Periodic replacement | $ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Low or uneven irradiance
- Measure spectral irradiance with a calibrated blue-light radiometer at the pad.
- Inspect the fibre-optic pad and cable for dark spots / damage.
- Clean the light-source output surface.
- Replace the lamp if the output is low.
- Replace a damaged pad or cable and re-measure.
Symptom: Thermal shutdown
- Confirm the cooling fan runs and the vents are clear.
- Clean the vents.
- Replace the fan if noisy or stopped.
- Let the unit cool and restart.
- Monitor for recurrence.
Documents & Manuals
No documents available for this device yet.
Troubleshoot this device with Bio
Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
Ask Bio