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Asset Type
Electrocardiograph (EKG) Machine
Manufacturer
Model
What This Guide Helps With
Troubleshooting ECG print failures, paper-feed problems, jams, blank output, or poor print quality caused by paper, loading, debris, or accessible printer conditions.
Step-by-Step Troubleshooting
1. Protect the Patient and Preserve the ECG Record
If a printed ECG is clinically required and the MAC 7 cannot provide a reliable record, use another verified ECG system or an approved electronic workflow.
Do not allow printer troubleshooting to delay urgent diagnostic testing.
Expected outcome: The patient ECG is obtained and documented through a reliable method while the printer is evaluated.
2. Confirm the Exact Printer Complaint
Determine whether the printer does not start, feeds incorrectly, jams, prints faintly, produces blank sections, or creates damaged output.
Check whether the displayed ECG itself is normal.
Expected outcome: The problem is isolated to printing rather than ECG acquisition.
3. Verify Correct Paper
Confirm that the installed paper is the appropriate approved type and is not wet, curled, wrinkled, contaminated, or damaged.
Replace questionable paper rather than repeatedly attempting to feed it.
Expected outcome: Suitable paper is available for testing.
4. Reload the Paper Correctly
Open only the normal paper-loading area. Remove the paper roll or stack as applicable, clear loose paper fragments, and reload it in the proper orientation.
Do not use tools inside the printer path unless specifically authorized by service documentation.
Expected outcome: Paper moves freely through the accessible loading path and the cover closes normally. If printing returns to normal, proceed to verification.
5. Clear Accessible Paper Jams
Power the unit down if required for safe access. Remove visible loose or folded paper from the normal paper path without forcing internal mechanisms.
Inspect for labels, torn paper, or foreign material.
Expected outcome: No accessible obstruction remains and paper feeds normally. If the jam immediately recurs, stop forcing paper through the mechanism.
6. Inspect Accessible Printer Surfaces
Look for accumulated paper debris, residue, contamination, or obvious damage in the accessible printer area.
Clean only those surfaces permitted by approved maintenance practices.
Expected outcome: Accessible printer surfaces are clean and undamaged.
7. Perform a Test Print
Generate an appropriate non-patient or simulator-based ECG and print it.
Evaluate paper movement, completeness of the tracing, legibility, and consistency across the page.
Expected outcome: The printer feeds continuously and produces a complete, readable tracing. If so, troubleshooting can stop after final verification.
8. Compare Paper and Printing Conditions
If output remains poor, test with fresh approved paper from a known-good supply. Confirm that the problem is not limited to one damaged or incorrectly stored paper batch.
Expected outcome: Normal print quality with replacement paper identifies the consumable as the cause.
9. Verify Printer Controls and Configuration
Confirm accessible print settings are appropriate for the clinical workflow and were not unintentionally changed.
Do not make unauthorized configuration changes or alter diagnostic settings simply to compensate for a mechanical print problem.
Expected outcome: Printing is enabled and configured appropriately.
10. Escalate Persistent Printer Failure
If the printer still jams, fails to feed, produces unreliable output, or does not operate with correct paper and no accessible obstruction, stop external troubleshooting.
Expected outcome: The device is removed from service when dependable printed output is required and routed for bench evaluation.
If the Problem Persists
Paper, loading, accessible obstruction, consumable condition, and normal controls have been checked. Remaining possibilities include the printer mechanism, drive components, thermal printing assembly, sensor system, power delivery, or another service-level fault.
The device should be:
- Removed from service if printing is required for the intended workflow.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
- Evaluated using appropriate manufacturer documentation and approved test equipment.
- Repaired only by qualified personnel.
After repair, verify complete and legible ECG printing under representative conditions before return to service. Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
A clear on-screen tracing does not compensate for an unreliable printer when the department's workflow requires a permanent printed diagnostic ECG.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported repeated paper jams and incomplete ECG printouts from the MAC 7."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found wrinkled paper and torn paper fragments obstructing the accessible feed path."
Resolution
What action was taken.
Example:
"Removed the paper fragments, installed fresh approved paper, and verified multiple complete and legible ECG test prints."
Helpful Details to Include (If Known)
- Printer symptom.
- Paper type and condition.
- Paper loading orientation.
- Jam location if visible.
- Debris or contamination found.
- Test paper substituted.
- Print settings observed.
- Test-print results.
- Whether ECG acquisition remained normal.
- Final device status.
Final Thought
Start with the consumable, loading path, and visible obstruction before assuming a printer assembly failure. Protect the clinical ECG workflow, verify a complete legible output, and escalate recurring mechanical problems appropriately.
That is successful troubleshooting.