On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Addresses abnormal movement or brake behavior caused by obstructions, controls, positioning, power conditions, mechanical interference, or external damage.
Step-by-Step Troubleshooting
1. Protect the Patient From Unintended Movement
Do not troubleshoot abnormal C-arm movement or unreliable braking while a patient is positioned within or near the equipment. Secure the procedure area and move the patient to a safe alternative imaging setup if necessary.
If the C-arm cannot be safely controlled, do not attempt further clinical positioning.
Expected outcome: No patient or staff member is at risk from uncontrolled or unexpected equipment movement.
2. Define the Exact Mechanical Complaint
Determine which motion or brake is affected and whether the issue is failure to release, failure to hold, excessive resistance, drifting, unexpected motion, or intermittent operation. Ask whether the problem began after transport, impact, cable snagging, or positioning.
Expected outcome: The affected movement or brake function is clearly identified.
3. Inspect for Physical Obstruction
Check the C-arm, wheels, mechanical travel paths, cables, accessories, covers, and surrounding equipment for anything blocking movement. Look for cables trapped under wheels, equipment contacting the C-arm, or accessories positioned within the motion path.
Do not force movement through resistance.
Expected outcome: All external movement paths are clear.
If removing an obstruction restores normal movement, continue to final verification.
4. Inspect for External Mechanical Damage
Look for bent covers, damaged handles, loose external parts, collision damage, wheel damage, or evidence the unit was struck or dropped.
Expected outcome: No visible mechanical damage compromises safe movement.
If structural damage is present, remove the unit from service and stop troubleshooting.
5. Verify System Power and Normal Operating State
Confirm that the Zenition Series has fully booted and has stable power. Some powered control functions may not behave normally if the system is partially started, shutting down, or experiencing power instability.
Expected outcome: The system is fully operational and movement/brake testing is performed under normal powered conditions.
6. Check User Controls for the Affected Motion or Brake
Operate the normal external brake-release or movement controls without a patient present. Verify that the control is not physically stuck, contaminated, damaged, or obstructed.
Do not bypass brake controls or manually defeat an electromagnetic brake.
Expected outcome: The external control moves freely and produces the expected mechanical response.
If cleaning an approved external control surface or removing a simple obstruction restores reliable operation, proceed to verification.
7. Compare Brake Release and Holding Behavior
With the system on a suitable level surface and no patient involved, verify that the affected brake releases when commanded and securely holds when engaged. Observe for drift or delayed engagement.
Expected outcome: The brake transitions consistently between released and engaged states and prevents unintended movement.
If the brake does not reliably hold, immediately remove the system from service.
8. Check Cable Routing During Motion
Carefully move the C-arm through the affected permitted range and observe external cable routing. Stop if cables become stretched, pinched, or caught, or if brake function changes with position.
Expected outcome: Normal motion does not place abnormal strain on cables or cause intermittent brake behavior.
9. Compare With a Known-Good System if Available
Compare the feel, brake engagement, permitted movement, and user-accessible controls with an equivalent Zenition system when appropriate.
Do not use excessive force simply because another unit moves more easily.
Expected outcome: The questioned movement is confirmed as normal or abnormal through controlled comparison.
10. Perform Final Functional Verification
Verify all affected movements are smooth, controllable, and free of obstruction. Confirm brakes hold securely and release normally in representative positions. Verify transport wheels and associated locks as applicable.
Expected outcome: The C-arm remains stable when locked and moves predictably only when intentionally released.
If all checks pass, troubleshooting can stop and the unit may be returned to service.
11. Escalate Persistent Mechanical or Brake Failure
If an electromagnetic brake does not release, does not hold, behaves intermittently, or movement remains abnormal after external causes are ruled out, stop troubleshooting.
Expected outcome: Unsafe mechanical operation is prevented from reaching clinical use.
If the Problem Persists
Common external obstruction, positioning, control, power, and visible mechanical causes have been ruled out. The remaining issue may involve a brake assembly, powered brake control, mechanical adjustment, sensor, internal wiring, or another service-level mechanical or electrical condition.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for qualified repair or mechanical evaluation.
- Evaluated using approved Philips service documentation and test equipment.
- Adjusted or repaired only by qualified personnel.
Do not defeat electromagnetic brakes, open internal brake assemblies, or perform unapproved mechanical adjustments. Complete comprehensive movement, brake-holding, collision-safety, and applicable functional testing before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Any C-arm that can drift or move after a brake is engaged should be removed from service immediately.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"OR staff reported that the Philips Zenition Series was difficult to reposition and one C-arm motion would not release normally."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found an external cable trapped in the movement path and placing tension on the C-arm."
Resolution
What action was taken.
Example:
"The cable was rerouted correctly, full permitted movement and brake holding were verified, and the system was returned to service."
Helpful Details to Include (If Known)
- Specific motion or brake affected.
- Whether the brake fails to release or hold.
- Whether drifting occurs.
- Equipment position when the issue occurs.
- External obstruction findings.
- Cable routing.
- Evidence of collision or impact.
- Control condition.
- Power state during testing.
- Known-good comparison result.
- Final movement and brake verification.
Final Thought
Movement and brake faults can create immediate patient and staff hazards. Rule out obstruction, cable routing, power, controls, and visible damage without forcing the mechanism, and escalate any unreliable brake or motion condition.
That is successful troubleshooting.