Canon L100 Service Manual

Also see for FAXPHONE L100: Basic operation guide Starter Guide Technical information

Contents

Canon L100 Service Manual Manual pdf 31 page image

22 2-82-8Technical Overview > Original Exposure System > Major Components > Various ControlTechnical Overview > Original Exposure System > Major Components > Various ControlOriginal Exposure SystemOverviewitem function / methoddocument exposure LEDdocument scan Document stream reading by fixed CIS Unitscanning resolution 600 dpi x 600 dpi (Horizontal x Vertical)number of gradations 256 gradationsmagnification 50 % to 200 % (1 % increment)Horizontal: image processing by Main Controller PCBVertical: image processing by Main Controller PCBlens CIS / ColorCIS Unit Number of lines: 1 lineNumber of pixels: 5148 pixels as total pixels (5104 pixels as effectivepixels)Maximum document scanning width: 216 mmCIS Unit drive control Drive control by document feeder motor (M3)Document size detection NoneThe Single-side Auto Document Feeder (SADF) mounted onto this host machine is dedicatedto stream-reading.1 motor (Document Feed Motor : M3) is engaged in pickup/feeding/delivery.At the start of copy/fax/scan, the Document Feed Motor is driven by the drive command fromthe Main controller to pickup/feed the originals set face down on the original tray one by onein order from the bottom. Image is read when the original passes over the Contact Sensor(CIS). Then, the original is delivered face-down to the Delivery Assembly of the original.T-2-3Major ComponentsMain components of the original exposure system are shown below.• CIS Unit for reading the original• Original Feed Motor (M3), Pickup Roller, Feed Roller and Delivery Roller for feeding theoriginalBased on the drive signals from the Main Controller PCB, image reading control moves theoriginal by rotating the Original Feed Motor (M3) so that the original is read by the CIS Unit.J21234B0/B0A0/A0Main Controller PCBM3■ Various Control● Original DetectionThere are two types of original detection in this equipment.1,Original Presence / Absence DetectionDetected by DS (Document Sensor)Setting the original onto the original tray pushes up the actuator, activating (light shielded=>light transmitted) the DS, and resulting in detection of the presence of original.2,Detection of the End of the OriginalDetected by the DES (Document End Sensor)The leading edge of the original that is fed pushes up the actuator, activating the DES (lightshielded =>light transmitted) and resulting in detection of the reach of the leading edge oforiginal. Furthermore, when the trailing edge of the original passes the actuator position,the actuator returns to the original position, inactivating the DES (light transmitted => lightshielded). The trailing edge of the original is detected by this mechanism. The originallength that can be scanned with this equipment is less than 400 mm. Passing of the originallonger than this results in jam stop. The original length is calculated by the time it takesfrom detection of the leading edge of the original to detection of the trailing edge of theoriginal.F-2-6