The Hitachi Aloka UST-990-5 is a common candidate for repair rather than replacement. This page lists its typical failure modes, self-checks you can run, and the details a repair lab needs from you.
| Manufacturer | Hitachi Aloka |
|---|---|
| Model | UST-990-5 |
| Probe type | Convex array |
| Compatible systems | Aloka SSD-1000, Aloka SSD-1400, Aloka SSD-1700, Aloka SSD-2000, Aloka SSD-2200, Aloka SSD-900 |
In service the UST-990-5 is most often found on Aloka SSD-1000, Aloka SSD-1400, Aloka SSD-1700, Aloka SSD-2000, Aloka SSD-2200 and other listed systems. Console-side settings and module revisions still vary, so the exact system build is part of any assessment.
On convex probes such as the UST-990-5, the curved acoustic window wears unevenly under pressure-heavy scanning; lens condition is the first thing to check when image quality drops.
Common failure modes for the UST-990-5
Match what you are seeing against the table below. The right-hand column reflects how faults of this kind typically assess – the actual verdict always depends on the individual probe.
| What you see | Likely cause | Typically repairable? |
|---|---|---|
| Split seams or impact marks on the probe body | Impact damage; housing can usually be replaced or resealed | Usually repairable |
| Latch or locking hardware damaged on the connector shell | Mechanical damage to the connector shell | Usually repairable |
| Fuzzy or noisy image that cleaning does not fix | A worn lens surface or elements beginning to degrade | Case by case |
| Visible nicks, grooves or staining on the lens surface | Mechanical wear or disinfectant damage to the lens | Usually repairable |
| Noticeably weaker penetration than the paired probe | Ageing elements or lens delamination reducing acoustic output | Case by case |
| Large areas of the array not firing | Widespread element or acoustic stack failure | Usually not economical |
| Bubbles or lifting at the lens face | Lens delamination from the acoustic stack | Usually repairable |
Check these before you ship the probe
- Flex the cable gently along its length while imaging – intermittent dropout points to broken conductors.
- Photograph the complete manufacturer label – the exact revision matters for parts compatibility.
- Compare penetration and uniformity against a known-good probe on the same preset.
- Examine the connector for bent or corroded pins, cracks and a working locking mechanism.
- Run the system’s built-in probe test or element check if your console provides one.
Repair, exchange or replace — which applies to your UST-990-5
Three paths apply to a failing UST-990-5: repair (typical for lens, housing, cable and connector damage), exchange (fastest route back to scanning) or replacement (when the acoustic stack is too far gone). The deciding factors are how much of the array still fires, whether the housing is intact and what downtime costs you. Each probe is judged on its actual condition.
What we need to quote your UST-990-5 repair
- A clear photo of the complete manufacturer and model label on the probe
- A description of the fault: what you see on screen and when it started
- The ultrasound system (console) the probe is used with
- Screenshots or photos of the image problem, if the fault is visual
- Photos of any physical damage – lens, housing, cable or connector
Images shown are representative and are not photographs of an individual unit. Nothing on this page claims OEM authorization or guarantees universal fit. Whether a specific UST-990-5 can be repaired, and on what terms, is confirmed in writing once the probe has been assessed.
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