This page covers the Philips 21255B 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 | 21255B |
| Probe type | Linear array |
| Compatible systems | HP Sonos 2000, HP Sonos 2500, HP Sonos 4500, HP Sonos 5500 |
You will usually see the 21255B running on HP Sonos 2000, HP Sonos 2500, HP Sonos 4500, HP Sonos 5500. Mention the console model with the fault description – connector and revision differences matter.
Linear arrays like the 21255B 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 21255B
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? |
|---|---|---|
| Latch or locking hardware damaged on the connector shell | Mechanical damage to the connector shell | Usually repairable |
| Pin damage or corrosion visible in the connector | Connector damage from forced insertion or drops | Usually repairable |
| Cuts, gouges or discoloration on the lens membrane | Mechanical wear or disinfectant damage to the lens | Usually repairable |
| Air pockets or peeling visible on the acoustic lens | The lens separating from the acoustic stack underneath | Usually repairable |
| Split seams or impact marks on the probe body | A drop or knock; housings are routinely replaced or resealed | Usually repairable |
| Fuzzy or noisy image that cleaning does not fix | Lens wear or early element degradation | Case by case |
| Large areas of the array not firing | Extensive element loss across the acoustic stack | Usually not economical |
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.
- 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.
- Check the strain reliefs at both ends for splits, stiffness or separation from the cable.
Repair, exchange or replace — which applies to your 21255B
Whether a 21255B is worth repairing depends on the damage scope: localized lens, cable, strain relief and connector faults are routine repairs, while widespread element loss usually is not economical. An exchange unit can bridge the gap when downtime matters, and replacement becomes rational when repair cost approaches replacement value. A written assessment settles this per probe – condition, not model, decides it.
What we need to quote your 21255B 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 21255B can be repaired, and on what terms, is confirmed in writing once the probe has been assessed.
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