Table Of Contents - Ricoh IS450S Service Manual

1. OVERALL MACHINE INFORMATION ........................................ 1-1
1.1 SPECIFICATIONS.....................................................................................1-1
1.1.1 MAIN BODY......................................................................................1-1
1.1.2 ENDORSER .....................................................................................1-2
1.2 COMPONENT LAYOUT ............................................................................1-3
1.2.1 FRONT VIEW ...................................................................................1-3
1.2.2 REAR VIEW......................................................................................1-4
1.2.3 ADF ..................................................................................................1-5
1.3 DRIVE LAYOUT ........................................................................................1-6
1.3.1 SCANNER ........................................................................................1-6
1.3.2 ADF ..................................................................................................1-7
1.4 ELECTRICAL COMPONENT LAYOUT .....................................................1-8
1.4.1 SCANNER ........................................................................................1-8
1.4.2 ADF ..................................................................................................1-9
2. DETAILED SECTION DESCRIPTIONS ....................................... 2-1
2.1 INITIALIZATION ........................................................................................2-1
2.2 SCANNER MECHANISMS........................................................................2-3
2.2.1 BOOK MODE....................................................................................2-3
2.2.2 ADF MODE.......................................................................................2-7
2.3 PAPER MISFEED DETECTION ..............................................................2-14
2.4 IMAGE PROCESSING ............................................................................2-16
2.4.1 OVERVIEW ....................................................................................2-16
2.4.2 SBU ................................................................................................2-17
2.4.3 IPU (IMAGE PROCESSING UNIT).................................................2-18
2.5 REVERSE SIDE SCANNING ..................................................................2-21
2.5.1 OVERVIEW ....................................................................................2-21
2.5.2 CIS (CONTACT IMAGE SENSOR) UNIT .......................................2-22
2.5.3 IMAGE SCANNING ........................................................................2-23
2.6 ENDORSER UNIT ...................................................................................2-24
2.6.1 OVERVIEW ....................................................................................2-24
2.6.2 ENDORSER UNIT ..........................................................................2-25
2.7 LOW POWER MODE ..............................................................................2-26
2.8 MAIN PCBs AND THEIR FUNCTIONS ...................................................2-27
2.8.1 BOARD STRUCTURE ....................................................................2-27
2.8.2 SCU (SCANNER CONTROL UNIT) ...............................................2-28
2.8.3 IOB (INPUT/OUTPUT BOARD) ......................................................2-29
2.8.4 ADU (ADF DRIVE UNIT) ................................................................2-30

TABLE OF CONTENTS

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