Ricoh A250 Руководство по эксплуатации - Страница 2

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OVERALL INFORMATION

1. OVERALL MACHINE INFORMATION ........................................ 1-1

1.1 SPECIFICATIONS .................................................................................... 1-1

1.2 MACHINE CONFIGURATION .................................................................. 1-5

1.3 PAPER PATH ........................................................................................... 1-6

1.4 MECHANICAL COMPONENT LAYOUT................................................... 1-7

1.5 ELECTRICAL COMPONENT DESCRIPTIONS........................................ 1-8

1.5.1 COPIER ENGINE ............................................................................ 1-8

1.6 DRIVE LAYOUT...................................................................................... 1-11

1.7 COPY PROCESS ................................................................................... 1-12

1.7.1 OVERVIEW.................................................................................... 1-12

1.8 BOARD STRUCTURE ............................................................................ 1-14

1.8.1 OVERVIEW.................................................................................... 1-14

1.8.2 DESCRIPTION .................................................................................... 1-15

DETAILED DESCRIPTIONS

2. DETAILED SECTION DESCRIPTIONS....................................... 2-1

2.1 SCANNING ............................................................................................... 2-1

2.1.1 OVERVIEW...................................................................................... 2-1

2.1.2 SCANNER DRIVE ........................................................................... 2-2

2.1.3 ORIGINAL SIZE DETECTION IN PLATEN MODE .......................... 2-3

2.2 IMAGE PROCESSING ............................................................................. 2-5

2.2.1 OVERVIEW...................................................................................... 2-5

2.2.2 SBU (SENSOR BOARD UNIT) ........................................................ 2-7

2.2.3 AUTO IMAGE DENSITY (ADS) ....................................................... 2-8

2.2.4 IMAGE PROCESSING UNIT (IPU).................................................. 2-9

2.2.5 MEMORY CONTROLLER AND EXTENDED MEMORY

BOARD (EMB) ............................................................................... 2-20

2.2.6 VIDEO CONTROL UNIT (VCU) ..................................................... 2-21

2.2.7 IMAGE PROCESSING SUMMARY ............................................... 2-23

2.3 LASER EXPOSURE ............................................................................... 2-33

2.3.1 OVERVIEW.................................................................................... 2-33

2.3.2 OPTICAL PATH ............................................................................. 2-34

2.3.3 AUTO POWER CONTROL (APC) ................................................. 2-35

2.3.4 LD SAFETY SWITCH .................................................................... 2-36

2.4 ALL-IN-ONE CARTRIDGE (AIO CARTRIDGE) ...................................... 2-37

2.4.1 OVERVIEW.................................................................................... 2-37

2.4.2 DRIVE ............................................................................................ 2-38

2.4.3 DRUM CHARGE ............................................................................ 2-39

2.4.4 DEVELOPMENT............................................................................ 2-40

2.4.5 DRUM CLEANING ......................................................................... 2-43

TABLE OF CONTENTS

A250