Develop QC 2235 Plus Service Manual page 34

Scanner section (IR section)
Key Name
[1] Original Cover Angle Sensor (PC202) • Validates or resets the size of the original.
[2] Original Size Sensor FD1 (PC203)
[3] Scanner Motor Drive Board (PWB-IC) • Drives the Scanner Motor.
[4] Original Size Sensor FD2 (PC204)
[5] Scanner Motor (M201)
[6] Lens
[7] CCD Unit *1
[8] Size Reset Switch (SW201)
[9] Image Processing Board (PWB-C)
[10] Exposure Unit
[11] Mirror Unit
[12] Original Size Sensor CD1 (PC206)
[13] Scanner Home Sensor (PC201)
∗1: CCD Unit
R
G
B
Main Scanning
Direction
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
• Detects the original of a small size in the FD direction.
• Detects the original of a large size in the FD direction.
• Drives the Scanner Drive Cables for moving the Expo-
sure Lamp and Scanner.
• Drives the Scanner Motor Drive Board (PWB-IC).
Three-phase stepping motor
•
• F5.0, focal length 71.2 mm
• Changes optical image data to a corresponding electric
signal (600 dpi).
• Three-line (RGB) linear image sensor
• Detects the position of the Original Cover or ADF,
whether it is raised or lowered.
• Resets the size of the original when the ADF is raised.
• Magnetic sensor type
• Processes image data that has been scanned.
• Slit exposure
• Reflects the light reflected off the original.
• Detects the original of a large size in the CD direction.
• Detects the Scanner at its home position.
Scanning Direction
9.325 µm
2-4
Function/System
CCD Sensor
37.3 µm
37.3 µm
9.325 µm
4036ma2602c0