Chapter 55-5F-5-4F-5-5Scanner motor M501 2-phase pulse motor (pulse control)Reader Cooling fan FM501 cools the reader blockADF open/closed sensor 1 PS501 detects the state (open/closed) of the ADF; at 5 degScanner HP sensor PS502 detects scanner home positionADF open/closed sensor 2 PS503 detects the state (open/closed) of the ADF (detects timing of size detection at 25 deg)Original size sensor (AB) --- detects the size in sub scanning direction (AB-configuration)Original size sensor (inch) --- detects size in sub scanning direction (inch)Mirror --- No. 1, 2, 3 mirrorsInverter PCB --- drives the scanning lampCCD unit --- collects image data, performs analog image processingReader controller PCB---controls the reader unit as a whole, performs digital image processingItem Notation DescriptionInterface PCBScanning lampInverter PCBCCD unitReader controller PCBOriginal size sensor(inch)Original size sensor(A/B)ADFopen/closed sensorScanner motorScannerHP sensorReader cooling fan 2Reader cooling fan 1Platen glassOriginalscanning lamp Lens CCDNo. 1 mirrorNo. 1 mirror baseNo. 2 mirrorNo. 2 mirror baseNo. 3 mirrorHPImage leading edgeSize detectionStream reading position(start position)
