Ricoh B001 Service Manual - Page 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
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