Troubleshoot Subassembly Errors / Reset the use Count if you replace a Subassembly

Clear the Error Codes after Repair

Newer L-Series Lenses Record: Actuation Counts and Errors

These lenses track usage and errors from key internal components:

• Diaphragm Unit
• AF (Autofocus) Unit
• IS (Image Stabilization) Unit

Error Window

• This window identifies errors in malfunctioning units, helping you pinpoint the source of the issue.
• Example:  IS Unit – Gyro Sensor: Anomalous

This data provides a clear picture of the lens’s overall condition and can help identify malfunctioning sub-assemblies.

Reset

• Use Reset to zero the actuation count after replacing a sub-assembly.

Clear

• Use Clear to erase error codes after performing repairs.