Ricoh Aficio 240W Service Manual page 18

5.3 INITIAL SETTINGS ...................................................................................5-5
5.3.1 USER TOOLS ..................................................................................5-5
System Settings ....................................................................................5-5
Copier Features ....................................................................................5-8
5.4 PRINTING TEST PATTERNS .................................................................5-11
5.4.1 IMAGE PROCESSING TEST PATTERNS .....................................5-11
5.4.2 IMAGE DATA PATH TEST PATTERNS.........................................5-13
5.5 INPUT CHECK ........................................................................................5-14
5.6 OUTPUT CHECK ....................................................................................5-17
5.7 SP (SERVICE PROGRAM) MODE TABLES...........................................5-19
SP1-XXX Feed ...................................................................................5-19
SP2-XXX Drum ...................................................................................5-28
SP3-XXX Process Control ..................................................................5-38
SP4-XXX Scanner ..............................................................................5-39
SP5-XXX Mode...................................................................................5-49
SP7-XXX Data Log .............................................................................5-57
SP8xxx Data Log 2 .............................................................................5-71
DETAILED DESCRIPTIONS
6. DETAILED DESCRIPTIONS ........................................................ 6-1
6.1 OVERVIEW ...............................................................................................6-1
6.1.1 MACHINE GENERAL LAYOUT........................................................6-1
6.1.2 MECHANICAL COMPONENT LAYOUT...........................................6-2
6.1.3 DRIVE LAYOUT ...............................................................................6-4
6.1.4 ORIGINAL/COPY PAPER PATHS ...................................................6-5
6.2 SCANNER .................................................................................................6-6
6.2.1 OVERVIEW ......................................................................................6-6
6.2.2 SCANNER LAYOUT.........................................................................6-7
6.2.3 ORIGINAL WIDTH DETECTION ......................................................6-8
6.2.4 ORIGINAL DRIVE MECHANISM......................................................6-9
6.2.5 ORIGINAL FEED SPEED.................................................................6-9
6.2.6 SCANNING MECHANISM..............................................................6-10
CIS Structure ......................................................................................6-10
Printed Image .....................................................................................6-10
6.2.7 AUTO IMAGE DENSITY CORRECTION........................................6-11
6.3 IMAGE PROCESSING ............................................................................6-12
6.3.1 OVERVIEW ....................................................................................6-12
Overall System ...................................................................................6-12
IPU Board Details ...............................................................................6-13
6.3.2 GENERAL IMAGE PROCESSING FLOW CHART.........................6-14
6.3.3 ORIGINAL MODES ........................................................................6-15
Overview.............................................................................................6-15
Text Mode...........................................................................................6-16
Photo Mode ........................................................................................6-17
Text/Photo Mode ................................................................................6-18
Pale Mode...........................................................................................6-19
Generation ..........................................................................................6-20
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