Epson AcuLaser C8500 Service Manual page 16

EPSON AcuLaser C8500
2.3.5 INV MOTOR ASSY (Option Duplex) ..................................... 2-17
2.3.6 Gear Layout ........................................................................... 2-18
2.3.6.1 Printer ............................................................................. 2-18
2.3.6.2 Option Duplex ................................................................. 2-19
2.4 Paper Feed ............................................................................................. 2-20
2.4.1 Paper Feed Path (When no options are installed) ................ 2-20
2.4.2 Paper Feed Path (Option Duplex) ......................................... 2-21
2.4.3 Paper Conveyance Path Layout ............................................ 2-22
2.5 Function of Main Working Parts ....................................................... 2-23
2.5.1 Paper Cassette ...................................................................... 2-23
2.5.2 Paper Feeder ........................................................................ 2-24
2.5.3 MSI/Paper Transportation I ................................................... 2-26
2.5.4 MSI/Paper Transportation II .................................................. 2-27
2.5.5 Xerographics I ....................................................................... 2-29
2.5.6 Xerographics II ...................................................................... 2-30
2.5.7 Development ......................................................................... 2-32
2.5.8 IBT I ....................................................................................... 2-34
2.5.9 IBT II ...................................................................................... 2-35
2.5.10 Fusing I ................................................................................ 2-37
2.5.11 Fusing II ............................................................................... 2-38
2.5.12 Paper Exit ............................................................................ 2-39
2.5.13 Drive .................................................................................... 2-40
2.5.14 Electrical .............................................................................. 2-42
2.5.15 Option Duplex ...................................................................... 2-44
2.6 Operation Mode .................................................................................... 2-48
2.7 Control ..................................................................................................... 2-49
2.7.1 Paper Size Control ................................................................ 2-49
2.7.2 Cassette 2/Cassette 3 paper size control .............................. 2-50
2.7.3 Paper Supply Unit Selection Control ..................................... 2-51
2.7.4 OHP Front/Back Detection Control ....................................... 2-51
2.7.5 ROS Control .......................................................................... 2-52
2.7.5.1 Scanner Motor Operation ............................................... 2-52
2.7.5.2 ROS Warm-Up ............................................................... 2-52
2.7.5.3 Quantity of Light Control ................................................. 2-52
2.7.6 Process Control ..................................................................... 2-53
2.7.6.1 Potential Control ............................................................. 2-53
2.7.6.2 Toner Concentration Control (PCDC) ............................. 2-54
2.7.6.3 Toner Concentration Control (ADC) ............................... 2-54
2.7.6.4 ADC Solenoid Operation ................................................ 2-55
2.7.7 XERO. Control ...................................................................... 2-56
2.7.7.1 Operation when DRUM CARTRIDGE is Replaced ........ 2-56
2.7.7.2 DRUM CARTRIDGE Life Detection Control ................... 2-56
2.7.7.3 WASTE TONER BOX Full Detection Control ................. 2-57
2.7.8 DEVE. Control ....................................................................... 2-59
2.7.8.1 Home Position Detection Operation ............................... 2-59
2.7.8.2 Toner Cartridge Presence Detection Position ................ 2-60
2.7.8.3 Toner Cartridge New/Old Detection Position ................. 2-60
2.7.8.4 Developing Position ........................................................ 2-60
2.7.8.5 Detection Method Accompanying DEVE. Control .......... 2-61
2.7.9 IBT Control ............................................................................ 2-63
2.7.9.1 Primary Transfer (Drum --> Belt) .................................... 2-63
2.7.9.2 Secondary Transfer (Belt-->Paper) ................................ 2-64
2.7.9.3 Belt Cleaning .................................................................. 2-66
2.7.9.4 IBT-related life detection control ..................................... 2-67
2.7.10 Transfer Layout Control ...................................................... 2-68
2.7.11 FUSER Control ................................................................... 2-70
2.7.11.1 Fuser Control Method ................................................... 2-70
2.7.11.2 Control for WARM UP Mode ........................................ 2-70
2.7.11.3 READY / LIGHT SLEEP / DEEP SLEEP Modes Control 2-70
2.7.11.4 Control in PRINTING Mode .......................................... 2-70
2.7.11.5 FUSER skidding ........................................................... 2-71
2.7.11.6 Prevention of a FUSER NIP scar ................................. 2-71
2.7.11.7 MAIN FUSER ASSY Life Detection Control ................. 2-71
2.8 Controller Operating Principles ........................................................ 2-72
Chapter 3 Disassembly/Assembly/Adjustment
3.1 Overview .................................................................................................... 3-2
3.1.1 Precautions for Disassembly, Assembly and Adjustment ....... 3-2
3.1.1.1 Precaution for Handling the Lithium Battery ..................... 3-2
3.1.2 Tools ....................................................................................... 3-3
3.1.3 Items to Check after Assembly ............................................... 3-3
3.2 Disassembly/Assembly Procedures .................................................. 3-3
3.2.1 Exterior View and Part Names ................................................ 3-5
3.2.2 Removing/Replacing the Consumables .................................. 3-6
3.2.3 Updating the Main Controller Program ROM .......................... 3-6
3.2.3.1 Updating the ROM using a standard parallel interface ..... 3-6
3.2.3.2 Updating by copying from the FLASH ROM module ........ 3-7
3.2.3.3 Formatting the FLASH ROM Module ............................... 3-8
Revision C