Troubleshooting - Ricoh B064 Service Manual

Controller Board....................................................................................6-7
MB (Mother Board) ...............................................................................6-7
IPU (Image Processing Unit) ................................................................6-7
SBU (Sensor Board Unit)......................................................................6-8
PFC (Paper Feed Control) ....................................................................6-8
SDRB (Scanner Driver Board) ..............................................................6-8
VIB (Video Interface Board) ..................................................................6-8
DRB (Drive Board) ................................................................................6-8
CNB (Connection Board) ......................................................................6-8
HDD (Hard Disk Drive)..........................................................................6-9
6.3 COPY PROCESS OVERVIEW ...............................................................6-10
6.4 ADF .........................................................................................................6-12
6.4.1 OVERVIEW ....................................................................................6-12
6.4.2 ADF DRIVE LAYOUT .....................................................................6-13
6.4.3 PICK-UP ROLLER LIFT .................................................................6-14
6.4.4 BOTTOM PLATE LIFT....................................................................6-15
6.4.5 ORIGINAL SEPARATION ..............................................................6-16
6.4.6 ORIGINAL TRANSPORT ...............................................................6-17
6.4.7 ORIGINAL SKEW CORRECTION ..................................................6-18
6.4.8 ORIGINAL SIZE DETECTION........................................................6-20
6.4.9 ADF SCANNING.............................................................................6-23
6.4.10 JAM DETECTION.........................................................................6-24
6.5 SCANNING..............................................................................................6-25
6.5.1 OVERVIEW ....................................................................................6-25
6.5.2 SCANNER DRIVE ..........................................................................6-26
6.5.3 ORIGINAL SIZE DETECTION........................................................6-27
Sensors...............................................................................................6-27
Detection Timing.................................................................................6-28
6.5.4 SCANNING MAGNIFICATION .......................................................6-29
Book Mode..........................................................................................6-29
6.5.5 AUTO IMAGE DENSITY (ADS) ......................................................6-30
Xenon Lamp ! CCD ADS..................................................................6-30
CIS ADS .............................................................................................6-30
6.6 IMAGE PROCESSING ............................................................................6-31
6.6.1 OVERVIEW ....................................................................................6-31
6.6.2 IMAGE PROCESSING FLOW ........................................................6-32
6.6.3 IMAGE PROCESSING MODES .....................................................6-33
6.6.4 IMAGE QUALITY SP ADJUSTMENTS...........................................6-34
6.6.5 RELATION BETWEEN THE SP AND UP SETTINGS....................6-40
6.6.6 IMAGE PROCESSING TROUBLESHOOTING ..............................6-42
6.7 LASER EXPOSURE................................................................................6-45
6.7.1 OVERVIEW ....................................................................................6-45
OPTICAL PATH..................................................................................6-46
6.7.3 FOUR-BEAM EXPOSURE .............................................................6-47
6.7.4 COOLING FAN...............................................................................6-48
6.7.5 LD SAFETY SWITCHES ................................................................6-49
6.8 DRUM UNIT ............................................................................................6-50
6.8.1 OVERVIEW ....................................................................................6-50
6.8.2 OPC DRUM ....................................................................................6-51
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