This page covers the Philips 21258B from a repair perspective: the failure modes we see on this class of probe, how to check the probe yourself, and what information gets you an accurate repair quote.
| Manufacturer | Philips |
|---|---|
| Model | 21258B |
| Probe type | Linear array |
| Compatible systems | HP Sonos 2000, HP Sonos 2500, HP Sonos 4500, HP Sonos 5500 |
The 21258B typically pairs with HP Sonos 2000, HP Sonos 2500, HP Sonos 4500, HP Sonos 5500; the same fault can present differently between console revisions, which is why the host system is asked for with the quote details.
Linear arrays like the 21258B concentrate wear at the lens edges and the cable exit – shallow, high-frequency work means constant handling, and the first faults are usually mechanical rather than acoustic.
Common failure modes for the 21258B
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? |
|---|---|---|
| Strain relief pulling away from the cable or gone rigid | Cable flex fatigue at the probe or connector end | Usually repairable |
| Vertical shadowing or missing scan lines on screen | Element dropout, or a conductor break inside the cable | Case by case |
| Fuzzy or noisy image that cleaning does not fix | A worn lens surface or elements beginning to degrade | Case by case |
| Large areas of the array not firing | Widespread element or acoustic stack failure | Usually not economical |
| Pin damage or corrosion visible in the connector | Mechanical damage from forcing or dropping the connector | Usually repairable |
| Cable jacket cracked, wrinkled or discolored | Jacket wear; conductors may still be intact underneath | Usually repairable |
| Depth performance clearly below what this probe used to deliver | Ageing elements or lens delamination reducing acoustic output | Case by case |
Check these before you ship the probe
- Examine the connector for bent or corroded pins, cracks and a working locking mechanism.
- Flex the cable gently along its length while imaging – intermittent dropout points to broken conductors.
- Inspect the lens face under good light for cuts, bubbles, lifting edges or discoloration.
- Compare penetration and uniformity against a known-good probe on the same preset.
- Photograph the complete manufacturer label – the exact revision matters for parts compatibility.
Repair, exchange or replace — which applies to your 21258B
Repair suits the 21258B when damage is mechanical or confined – lens membrane, strain relief, cable jacket, connector hardware. Once element dropout spreads across large sections of the array, repair cost climbs toward replacement value and stops making sense. If uptime is critical, ask about exchange options while your probe is assessed.
What we need to quote your 21258B 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 21258B can be repaired, and on what terms, is confirmed in writing once the probe has been assessed.
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