Honeywell Titmus V4
Honeywell · Model Titmus V4
Test Distances: Far (20 feet/6m) Near (14 inches/35cm)
Key tips
- ·When no category-specific guidance fits, default to the manufacturer's own service manual and the general troubleshooting method in the Engineer's Guide.
- ·Run an incoming and annual electrical safety test regardless of how niche the device is.
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.
Instrument will not power on
MediumSymptoms: No illumination of the test slides, dead unit.
Root cause: Blown fuse(s) - a safety feature in the fuse holder disconnects power if the instrument is left plugged in during a fault; or a power-module fault.
Test field dim or uneven
MediumSymptoms: Slides hard to read, uneven brightness far vs near.
Root cause: Illumination lamp / LED at end of life or a dirty condenser.
Slide drum / test selection fault
MediumSymptoms: Wrong test appears, drum will not index cleanly.
Root cause: Worn slide-drum detent or its drive.
Occluder / response controls unresponsive
LowSymptoms: Left/right occluders or the response buttons do not register.
Root cause: Worn switch or wiring.
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.
Mains fuses (pair)
Unplug first; replace both.
Class Major service partRel. cost $R&R Fairly easy
Illumination lamp / LED
Class Periodic replacementRel. cost $$R&R Moderate
Slide drum / index mechanism
Class Major service partRel. cost $$R&R Moderate
Occluder / response switch set
Class Major service partRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Mains fuses (pair) Unplug first; replace both. | Major service part | $ | Fairly easy |
| Illumination lamp / LED | Periodic replacement | $$ | Moderate |
| Slide drum / index mechanism | Major service part | $$ | Moderate |
| Occluder / response switch set | Major service part | $ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Follow the manufacturer's PM schedule
- ·Perform incoming and annual electrical safety testing per facility biomedical program
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: Will not power on
- Unplug the instrument.
- Use a flat screwdriver to snap open the tab on the power module and pull out the fuse assembly.
- Replace both fuses.
- Reassemble and power on.
- If it still will not start, refer for service.
Symptom: Test field dim or uneven
- Replace the illumination lamp / LED.
- Clean the condenser and slide surfaces.
- Compare far and near field brightness.
- Check the drum seats each test fully in the light path.
- Verify a clear, even field on both distances.
Technical Specs
- Height
- 7.75 in
- Length
- 17 in
- Weight
- 13 lbs
- Width
- 11 in
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Varies by device - check the unit's own manual for facility placement guidance
Documents & Manuals
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