CONTENTS1. CONFIGURATION ..................................................................................... 1 - 11.1 System Configuration ........................................................................ 1 - 11.2 Printer Configuration .......................................................................... 1 - 21.4 Specification ...................................................................................... 1 - 31.5 Safety Standards ............................................................................... 1 - 52. OPERATION DESCRIPTION .................................................................... 2 - 12.1 Main Control Board ............................................................................ 2 - 32.2 Power Supply Unit ............................................................................. 2 - 42.3 High-Voltage Power Supply Board .................................................... 2 - 42.4 Electro-Photographic Processor ........................................................ 2 - 62.5 Electro-Photographic Process ........................................................... 2 - 102.5.1 Explanation of Each Process Operation .................................................. 2 - 122.6 Paper Jam Detection ......................................................................... 2 - 182.7 Toner Low Detection.......................................................................... 2 - 182.8 Cover Open ....................................................................................... 2 - 212.9 Detecting I/D Unit existence .............................................................. 2 - 213. PARTS REPLACEMENT ........................................................................... 3 - 13.1 Precautions for Parts Replacement ................................................... 3 - 13.2 Parts Layout....................................................................................... 3 - 33.3 Replacing Parts ................................................................................. 3 - 63.3.1 Hopper Plate ........................................................................................... 3 - 63.3.2 LED Head and Head Spring .................................................................... 3 - 73.3.3 Transfer Roller ......................................................................................... 3 - 83.3.4 How to remove Cover Upper Assy .......................................................... 3 - 93.3.5 Upper Cover Assy ................................................................................... 3 - 103.3.6 High-Voltage Power Supply Board (P2H) ............................................... 3 - 113.3.7 Top Cover Assy and Flat Cable Assy ...................................................... 3 - 123.3.8 Paper Holder ........................................................................................... 3 - 133.3.9 Side Plate M and Idle Gear ..................................................................... 3 - 143.3.10 Heat Assy ................................................................................................ 3 - 153.3.11 Drive Shaft E (Eject) and Eject Roller ..................................................... 3 - 163.3.12 Pressure Roller B (Back Up Roller) ......................................................... 3 - 173.3.13 Separator Guide ...................................................................................... 3 - 183.3.14 Pulse Motor (Main) .................................................................................. 3 - 203.3.15 Hopping Shaft Assy ................................................................................. 3 - 213.3.16 Regist Roller ............................................................................................ 3 - 223.3.17 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assy ................. 3 - 233.3.18 Base Plate ............................................................................................... 3 - 24