Ricoh A231 Manual de serviço - Página 2

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

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

1.2 PAPER EXIT TRAY SELECTION............................................................. 1-5

1.3 MACHINE CONFIGURATION .................................................................. 1-6

1.3.1 SYSTEM COMPONENTS ............................................................... 1-6

1.3.2 INSTALLABLE OPTION TABLE ...................................................... 1-8

Copier options ...................................................................................... 1-8

Fax options .......................................................................................... 1-8

1.4 MECHANICAL COMPONENT LAYOUT................................................... 1-9

1.5 PAPER PATH ......................................................................................... 1-11

1.6 ELECTRICAL COMPONENT DESCRIPTIONS...................................... 1-12

1.7 DRIVE LAYOUT ..................................................................................... 1-15

1.8 COPY PROCESS ................................................................................... 1-16

1.8.1 OVERVIEW ................................................................................... 1-16

1.9 BOARD STRUCTURE ............................................................................ 1-18

1.9.1 BLOCK DIAGRAM ......................................................................... 1-18

1.9.2 DESCRIPTIONS ............................................................................ 1-19

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 ................................................................................................. 2-6

2.2.3 AUTO IMAGE DENSITY (ADS) ....................................................... 2-7

2.2.4 IPU (IMAGE PROCESSING UNIT).................................................. 2-8

Overview .............................................................................................. 2-8

Image processing path......................................................................... 2-9

SP modes for each image process .................................................... 2-10

Auto shading ...................................................................................... 2-12

Background erase .............................................................................. 2-12

Independent dot erase ....................................................................... 2-13

Filtering, main scan magnification/reduction ...................................... 2-14

Gamma (γ) correction......................................................................... 2-15

Gradation processing ......................................................................... 2-15

2.2.5 MEMORY BLOCK.......................................................................... 2-18

Binary picture processing mode ......................................................... 2-19

Grayscale processing mode............................................................... 2-20

2.2.6 FCI (FINE CHARACTER IMAGE).................................................. 2-21

2.3 LASER EXPOSURE ............................................................................... 2-22

A230/A231/A232

TABLE OF CONTENTS

A230/A231/A232