HP 21378A
HP · Model 21378A
The 21378A transducer is used on the HP 7500, EnVisor, HD11 and HD11 XE ultrasound systems. The 21378A is used in Adult and Pediatric applications. This transducer is also called an OmniPlane III TEE Sector Transducer.
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.
Image dropout / dead element lines
HighSymptoms: Persistent dark bands or a missing sector that do not move with the anatomy.
Root cause: Failed piezoelectric elements or (fetal) a degraded crystal.
Intermittent signal with cable flex
HighSymptoms: Image / signal drops or is noisy when the cable or strain relief is moved.
Root cause: Broken conductors in the transducer cable or at the connector.
Acoustic lens / membrane / housing damage
MediumSymptoms: Haze, artefacts, reduced penetration, a visible cut or bubble, cracked housing.
Root cause: Lens delamination or a puncture; drop damage.
Connector pin damage / not recognised
MediumSymptoms: System does not detect the probe or shows the wrong probe; bent or corroded pins.
Root cause: Damaged connector pins or a wet / dirty connector.
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.
Transducer cable
Manufacturer / authorised repair only.
Class Periodic replacementRel. cost $$$R&R Difficult
System connector assembly
Class Major service partRel. cost $$$R&R Difficult
Acoustic lens / membrane
Class Periodic replacementRel. cost $$$R&R Expert-level
Strain-relief boot
Class Periodic replacementRel. cost $R&R Moderate
Needle-guide bracket
Class Periodic replacementRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Transducer cable Manufacturer / authorised repair only. | Periodic replacement | $$$ | Difficult |
| System connector assembly | Major service part | $$$ | Difficult |
| Acoustic lens / membrane | Periodic replacement | $$$ | Expert-level |
| Strain-relief boot | Periodic replacement | $ | Moderate |
| Needle-guide bracket | Periodic replacement | $ | Easy |
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: Dropout / dead lines / weak signal
- Confirm the artefact stays fixed on screen and is not gel-bubble shadowing.
- Wipe off all gel, clean the face and re-gel.
- Try the probe on a second compatible system, and a known-good probe on this system.
- Inspect the face / lens for cuts or delamination.
- If the probe is confirmed faulty, return it for repair - do not open the housing.
Symptom: Signal drops when the cable is moved
- Flex the cable along its length and at both ends.
- Inspect the connector pins and the cable jacket.
- Confirm the connector is dry and fully latched.
- Return the probe for repair if the fault tracks the cable.
- Electrical-safety-test after any repair.
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