Ricoh B234 - Page 24

B234/B235/B236/D101/D102/D103 xii SM
6.6.1 OVERVIEW.....................................................................................6-18
6.6.2 PICK-UP ROLLER RELEASE .........................................................6-19
6.6.3 BOTTOM PLATE LIFT ....................................................................6-20
6.6.4 PICK-UP AND SEPARATION .........................................................6-21
6.6.5 ORIGINAL FEED.............................................................................6-22
6.6.6 ORIGINAL SIZE DETECTION.........................................................6-23
Original Length ...................................................................................6-23
Original Width .....................................................................................6-23
Original Width Sensor Location ..........................................................6-23
Detectable Paper Sizes ......................................................................6-23
6.6.7 ORIGINAL TRANSPORT ................................................................6-24
6.6.8 ORIGINAL SKEW CORRECTION...................................................6-25
6.6.9 ORIGINAL INVERSION AND FEED-OUT.......................................6-26
General Operation ..............................................................................6-26
Original Inversion................................................................................6-27
Original Exit (Single-Sided Original Mode)..........................................6-28
Original Exit (Double-Sided Original Mode) ........................................6-29
6.6.10 ADF JAM CONDITIONS............................................................6-30
Feed-in................................................................................................6-30
Feed-out .............................................................................................6-30
Inversion .............................................................................................6-30
6.7 SCANNING...............................................................................................6-31
6.7.1 OVERVIEW.....................................................................................6-31
6.7.2 SCANNER DRIVE...........................................................................6-34
Magnification and Reduction...............................................................6-34
6.7.3 ORIGINAL SIZE DETECTION.........................................................6-35
6.7.4 AUTO IMAGE DENSITY (ADS).......................................................6-38
6.8 BOARD STRUCTURE..............................................................................6-39
6.8.1 BLOCK DIAGRAM...........................................................................6-39
6.8.2 COMPONENT DESCRIPTIONS .....................................................6-40
PCBs...................................................................................................6-40
Board LEDs ........................................................................................6-42
HDD (Hard Disk Drive)........................................................................6-43
6.9 IMAGE PROCESSING .............................................................................6-44
6.9.1 IMAGE PROCESSING STEPS AND RELATED SP MODES .........6-44
6.9.2 IMAGE PROCESSING OVERVIEW................................................6-45
6.9.3 IMAGE PROCESSING FLOW.........................................................6-46
6.9.4 IMAGE PROCESSING MODES......................................................6-47
6.9.5 IMAGE QUALITY SP ADJUSTMENTS ...........................................6-48
Custom Settings for Each Mode: Image Quality .................................6-48
Custom Settings for Each Mode: Line Width Correction.....................6-51
Settings Adjustable for Each Original Mode........................................6-53
6.9.6 RELATION BETWEEN THE SP AND UP SETTINGS.....................6-54
6.10 LASER EXPOSURE ...........................................................................6-56
6.10.1 OVERVIEW ...............................................................................6-56
6.10.2 LASER EXPOSURE MECHANISM ...........................................6-57
6.10.3 LD SAFETY SWITCHES ...........................................................6-58
6.10.4 MULTI-BEAM LINE EXPOSURE...............................................6-59
6.10.5 POLYGON MIRROR MOTOR ...................................................6-60