Shimadzu ED-125
Shimadzu · Model ED-125
High output Simple operation One pulse exposure Electric mAs meter Fluoroscopic timer.
Key tips
- ·Never bypass a radiation interlock to "just get the image" - this is one of the few true zero-tolerance rules in BMET work.
- ·Trend image-quality phantom results over time - drift shows up before an outright failure does.
- ·Portable/mobile units take real physical abuse from transport - check wheel locks and cable strain reliefs more often than fixed units.
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.
No or inconsistent exposure / generator error
HighSymptoms: Exposure inhibited, generator error / fault code, images consistently under- or over-exposed.
Root cause: HV generator / inverter fault, an exposure-switch / contactor fault, an HT-cable fault, or a tube-load / thermal interlock.
kV / mA / mAs inaccuracy
HighSymptoms: Output does not match the console, techniques drift, generator calibration fails.
Root cause: Inverter / HV-tank fault, a filament-supply fault, or a calibration issue.
AEC (phototimer) fault
MediumSymptoms: Auto-exposure images consistently over- or under-exposed, chambers not tracking.
Root cause: AEC ion chamber(s) or the AEC calibration.
Tube-stand / table / bucky / collimator fault
MediumSymptoms: Column, wall stand, table or bucky will not track / detent; collimator light out; grid errors.
Root cause: Drive / brake / detent hardware, the collimator lamp / drive, or a bucky-motor fault.
Tube overload / cooling lockout
LowSymptoms: Exposures inhibited after a series, tube-heat alarm.
Root cause: Tube housing heat limit reached or a cooling-fan fault.
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.
HV generator / inverter components
Class Major service partRel. cost $$$$R&R Expert-level
HT cables
Class Major service partRel. cost $$$R&R Difficult
X-ray tube assembly
Class Major service partRel. cost $$$$R&R Expert-level
AEC ion chamber
Class Major service partRel. cost $$$R&R Difficult
Collimator lamp / drive assembly
Class Periodic replacementRel. cost $$R&R Moderate
Bucky / grid motor
Class Major service partRel. cost $$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| HV generator / inverter components | Major service part | $$$$ | Expert-level |
| HT cables | Major service part | $$$ | Difficult |
| X-ray tube assembly | Major service part | $$$$ | Expert-level |
| AEC ion chamber | Major service part | $$$ | Difficult |
| Collimator lamp / drive assembly | Periodic replacement | $$ | Moderate |
| Bucky / grid motor | Major service part | $$ | 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.
- ·Daily QC per modality: image-quality phantom test
- ·Tube and detector inspection
- ·Annual state-required radiation safety survey
- ·Vendor-scheduled preventive maintenance
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: No exposure or kV / mA error
- Note the exact generator error code.
- Confirm the mains supply is within the generator's spec (line-voltage compensation).
- Check the HT cables and the exposure contactor.
- Confirm the tube is not in a thermal lockout.
- Escalate a confirmed inverter / HV-tank / filament fault; verify output with an X-ray analyser after repair.
Symptom: AEC images over/under-exposed
- Verify the AEC response with a phantom at two thicknesses.
- Check the AEC chamber connections and the selected chambers / density.
- Recalibrate the AEC per the service procedure.
- Compare to a manual technique.
- Replace the AEC chamber if it will not calibrate.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Radiology / Imaging department
- Emergency Department (portable units)
- Operating Room (C-arms)
- Cath lab
- Bedside ICU (portable X-ray)
Documents & Manuals
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
Shimadzu is recalling Diagnostic X-ray Beam-Limiting Device, Mobile x-ray system and Diagnostic x-ray tube assembly because they do not comply with the Product Performance Standards, 21CFR 1020.30 (m) Beam quality --(1) Half-value layer (HVL), which was revised in 2006. Certain devices might not comply with the requirements for them in some x-ray generating condition after the revision in 2006.
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