Scanner maintenance involves regular cleaning, calibration, and software updates to ensure optimal performance and longevity. Cleaning focuses on removing dust and debris from the scanner glass and rollers, while calibration adjusts settings to maintain accuracy. Software updates can resolve compatibility issues and improve scanner performance. 

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An Annual Maintenance Contract (AMC) for scanners provides ongoing maintenance, repair, and sometimes parts replacement to ensure optimal performance and minimize downtime. It's a common way for organizations to keep their scanning equipment in good working order.