Canon Color Image Reader - L1 Service Manual

Also see for L1: Installation procedures Instructions

Canon Color Image Reader - L1 Service Manual Manual pdf 14 page image

2-32-322 TechnologyTechnologyScanner unitOriginal exposure and scanning are performed by the integrated scanner unit of LED, mirror,lens and CMOS line sensor.Light emitted from LED is reflected by the original and reaches the CMOS line sensor throughthe 3 folding mirrors and 4 free curvature mirrors.1. LED lamp unitOn LED lamp unit, the light is generated from the 2 LED lamp PCBs (LED chip: 48 pieces perPCB).Generated light is exposed to the original through the reflection plate.2. Free curvature mirrorScanner unit is equipped with the 3 folding mirrors and 4 free curvature mirrors.Free curvature mirror has symmetric facet in main scanning direction and asymmetric facet insub scanning direction against the optical axis.3. CMOS line sensorCMOS line sensor scans the image per 1image line.CMOS line sensor has 4 lines (R, G, B, BW). At B&W scanning, it uses 1 line (B/W) and uses3 lines (R, G, B) at color scanning.Error codeE301 (insuffi cient light intensity)-0001 The light intensity during front side shading is lower than the standard level-0101 The light intensity during back side shading is lower than the standard levelFree curved mirrors Turndown mirrorsCMOS line sensorFree curved mirrorsTurndown mirrorsLED (light source)CMOS PCBLED lamp unitCMOS line sensorRed (R) lineGreeen (G) lineBlue (B) lineBlack & white (B / W) line