Table Of Contents - Ricoh B089 Service Manual

OVERALL INFORMATION
1. OVERALL MACHINE INFORMATION......................................... 1-1
1.1 SPECIFICATIONS...............................................................................1-1
1.2 MACHINE CONFIGURATION ...................................................................1-4
1.2.1 SYSTEM COMPONENTS ................................................................1-4
1.2.2 INSTALLABLE OPTIONAL TABLE...................................................1-6
Copier options.......................................................................................1-6
Fax option .............................................................................................1-6
Printer/scanner options .........................................................................1-6
1.3 PAPER PATH............................................................................................1-7
1.4 MECHANICAL COMPONENT LAYOUT ...................................................1-8
1.5 ELECTRICAL COMPONENT DESCRIPTIONS ......................................1-10
1.6 DRIVE LAYOUT ......................................................................................1-13
1.7 COPY PROCESS....................................................................................1-14
1.7.1 OVERVIEW ....................................................................................1-14
1.8 BOARD STRUCTURE.............................................................................1-16
1.8.1 OVERVIEW ....................................................................................1-16
1.8.2 CONTROLLER ...............................................................................1-18
DETAILED DESCRIPTIONS
2. DETAILED SECTION DESCRIPTIONS ....................................... 2-1
2.1 SUMMARY ................................................................................................2-1
2.2 SCANNING................................................................................................2-2
2.2.1 OVERVIEW ......................................................................................2-2
2.2.2 SCANNER DRIVE ............................................................................2-3
2.2.3 ORIGINAL SIZE DETECTION IN PLATEN MODE...........................2-4
2.3 IMAGE PROCESSING ..............................................................................2-6
2.3.1 OVERVIEW ......................................................................................2-6
2.3.2 SBU (SENSOR BOARD UNIT).........................................................2-7
2.3.3 AUTO IMAGE DENSITY...................................................................2-8
2.3.4 IPU (IMAGE PROCESSING UNIT)...................................................2-9
2.3.5 VIDEO CONTROL UNIT (VCU)......................................................2-21
2.4 LASER EXPOSURE................................................................................2-22
2.4.1 OVERVIEW ....................................................................................2-22
2.4.2 AUTO POWER CONTROL (APC) ..................................................2-23
2.4.3 LD SAFETY SWITCH .....................................................................2-24
2.5 PHOTOCONDUCTOR UNIT (PCU) ........................................................2-25
2.5.1 OVERVIEW ....................................................................................2-25
2.5.2 DRIVE.............................................................................................2-26
2.5.3 NEW PCU DETECTION .................................................................2-27
SM
B089/B093

TABLE OF CONTENTS

i B089/B093