CHAPTER 55 - 5COPYRIGHT © 2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)Possible Cause Releated Parts Check Method Corrective ActionDrive belt broken or wornGears broken or wornStart button failureDrive motor failureDrive beltGear plate 2Button PCBMotor assemblyTrial replacementTrial replacementTrial replacementTrial replacementReplace the drive beltReplace the gear plate 2Replace the button PCBReplace the motor assemblyPossible Cause Releated Parts Check Method Corrective ActionScanning lamp is darkDirt on document glassMain PCB failureCCD PCB failureScanning unitDocument glassMain PCBScanning unitVisual checkVisual checkTrial replacementTrial replacementReplace the scanning unitClean the document glassReplace the main PCBReplace the scanning unitPossible Cause Related Parts Check Method Corrective ActionMotor assembly failureMain PCB failureScanning unit failureDirt on sliding rodReference sheet isimproperly positionedMotor assemblyMain PCBScanning unitNoneDocument glassTrial replacementTrial replacementTrial replacementVisual checkTrial replacementReplace the motor assemblyReplace the main PCBReplace the scanning unitClean the sliding rodReplace the document glassC. Carriage Movement FailureTable 5-3D. Poor Image QualityTable 5-4E. Noise GeneratedTable 5-5