E52
Canon Printer
Severity: CriticalWhat Does This Error Mean?
Error E52 means your Canon printer's scanner failed to initialize correctly at startup. The scanner mechanism could not complete its power-on self-test. This is a serious hardware error that usually requires professional service.
Affected Models
- Canon PIXMA MX490 Series
- Canon PIXMA MX920 Series
- Canon PIXMA TR8500 Series
- Canon MAXIFY MB2700 Series
- Canon PIXMA TS9500 Series
Common Causes
- The scanner carriage motor has failed and cannot move the carriage during the initialization sweep
- The scanner's home position sensor is dirty, damaged, or blocked, preventing the carriage from locating its start position
- A cable connecting the scanner unit to the main board is loose or has failed
- The printer experienced a power surge that damaged the scanner control circuit
- The scanner glass unit was improperly reassembled after a previous repair, causing a mechanical bind
How to Fix It
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Turn off the printer and unplug it completely. Wait at least 60 seconds before plugging it back in.
A full cold restart clears temporary faults in the scanner's motor controller and can resolve a transient E52.
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While the printer is unplugged, open the scanner lid and check for any objects on the glass or inside the scanner track.
Anything blocking the carriage's travel path will prevent initialization. Remove any objects and check that the glass is clean.
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Gently slide the scanner carriage (the bar under the glass) to confirm it moves smoothly without grinding or catching.
A carriage that moves freely suggests the motor or sensor is the issue. A carriage that sticks suggests a mechanical blockage.
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Plug the printer back in and turn it on. Listen during the startup sequence for any unusual sounds from the scanner.
A normal scanner initialization sounds like a smooth glide. Grinding, clicking, or silence from the scanner area points to a hardware fault.
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If E52 persists, do not attempt further repairs at home. Contact a Canon service center for professional diagnosis.
Attempting to force the scanner through initialization when a component is faulty can cause additional damage.
When to Call a Professional
Error E52 is a critical hardware failure requiring professional service in most cases. The scanner initialization mechanism involves precision optics and electronics that are not easily repaired at home. A Canon service center can diagnose and repair the scanner for $60 to $150 depending on the model. Contact Canon support at 1-800-OK-CANON (1-800-652-2666) to locate an authorized service center.
Frequently Asked Questions
What is the difference between E50 and E52?
Both errors involve the scanner. E50 means the scanner failed an alignment check — the carriage could not align itself precisely. E52 means the scanner failed its basic initialization at startup — it could not even complete the first movement. E52 is generally the more severe of the two.
Can a power surge cause error E52?
Yes. A power surge can damage the scanner's motor driver circuit or its position sensor. If E52 appeared after a power outage or storm, the scanner electronics may have been damaged. Using a surge protector is recommended for all printers.
Can I still print if my Canon shows E52?
On most Canon models, E52 halts all printer functions, including printing. The scanner and printer share initialization routines, and a scanner failure blocks the entire startup. You will need to have the scanner repaired before the printer will function again.