vi
5.8.2 RETRIEVING THE DEBUG LOG FROM THE HDD ....................5-146
5.8.3 RECORDING ERRORS MANUALLY ...........................................5-146
5.8.4 NEW DEBUG LOG CODES .........................................................5-147
SP5857-015 Copy SD Card-to-SD Card: Any Desired Key ..............5-147
SP5857-016 Create a File on HDD to Store a Log ...........................5-147
SP5857-017 Create a File on SD Card to Store a Log .....................5-147
6. DETAILED SECTION DESCRIPTIONS ....................................... 6-1
6.1 OVERVIEW ...............................................................................................6-1
6.1.1 COMPONENT LAYOUT ...................................................................6-1
6.1.2 PAPER PATH...................................................................................6-3
6.1.3 DRIVE LAYOUT ...............................................................................6-4
6.2 BOARD STRUCTURE...............................................................................6-5
6.2.1 BLOCK DIAGRAM............................................................................6-5
6.2.2 CONTROLLER .................................................................................6-7
6.3 COPY PROCESS OVERVIEW................................................................6-11
Exposure.............................................................................................6-11
Drum charge .......................................................................................6-11
Laser exposure ...................................................................................6-11
Development.......................................................................................6-11
Image transfer.....................................................................................6-12
Separation ..........................................................................................6-12
ID sensor ............................................................................................6-12
Cleaning..............................................................................................6-12
Quenching ..........................................................................................6-12
Cleaning..............................................................................................6-12
6.4 SCANNING..............................................................................................6-13
6.4.1 OVERVIEW ....................................................................................6-13
6.4.2 SCANNER DRIVE ..........................................................................6-14
Book Mode..........................................................................................6-14
ADF mode...........................................................................................6-14
6.4.3 ORIGINAL SIZE DETECTION IN PLATEN MODE.........................6-15
6.5 IMAGE PROCESSING ............................................................................6-17
6.5.1 OVERVIEW ....................................................................................6-17
6.5.2 SBU (SENSOR BOARD UNIT).......................................................6-18
6.5.3 AUTO IMAGE DENSITY (ADS) ......................................................6-19
6.5.4 IPU (IMAGE PROCESSING UNIT).................................................6-20
Overview.............................................................................................6-20
6.5.5 IMAGE PROCESSING MODES .....................................................6-21
6.5.6 SUMMARY OF IMAGE PROCESSING FUNCTIONS ....................6-23
6.5.7 IMAGE PROCESSING STEPS AND RELATED SP MODES.........6-24
Text Mode...........................................................................................6-24
Text/Photo Mode ................................................................................6-25
Photo Mode ........................................................................................6-26
Pale (Low-Density Mode)....................................................................6-27
Generation Copy Mode.......................................................................6-28
6.5.8 PRE-FILTERING ............................................................................6-29
6.5.9 BACKGROUND ERASE.................................................................6-30
6.5.10 INDEPENDENT DOT ERASE ......................................................6-31
