40718401TH Rev.5 2 /CONTENTS1. CONFIGURATION .................................................................................................. 51.1 System Configuration ..................................................................................... 51.2 Printer Configuration ....................................................................................... 71.3 Optional Configuration .................................................................................... 81.4 Specification ................................................................................................... 101.5 Safety Standards ............................................................................................ 121.5.1 Certification Label ................................................................................................... 121.5.2 Warning Label ........................................................................................................ 121.5.3 Warning/Caution Marking ....................................................................................... 132. OPERATION DESCRIPTION ................................................................................. 142.1 Main Control Board ......................................................................................... 162.2 Power Supply/Sensor Board ........................................................................... 172.3 Electrophotographic Process .......................................................................... 192.3.1 Electrophotographic Process Mechanism .............................................................. 192.3.2 Electrophotographic Process ................................................................................. 222.3.3 Process Operation Descriptions ............................................................................. 252.3.4 Revision of LED Head Illumination ......................................................................... 352.4 Paper Jam Detection ...................................................................................... 392.5 Cover Open .................................................................................................... 412.6 Toner Low Detection ....................................................................................... 423. PARTS REPLACEMENT........................................................................................ 443.1 Precautions for Parts Replacement ................................................................ 443.2 Parts Layout.................................................................................................... 463.3 How to Change Parts ...................................................................................... 493.3.1 Upper Cover Assy .................................................................................................. 503.3.2 IC Card Cover ........................................................................................................ 513.3.3 LED Head ............................................................................................................... 523.3.4 Operator Panel Assy .............................................................................................. 533.3.5 Lower Base Unit ..................................................................................................... 543.3.6 Pulse Motor (Main/Drum) ....................................................................................... 553.3.7 Pulse Motor (Registration) ...................................................................................... 563.3.8 Face Up Stacker Assy ............................................................................................ 573.3.9 Eject Roller Assy .................................................................................................... 583.3.10 Motor Assy ............................................................................................................. 593.3.11 Hopping Roller Shaft Assy ..................................................................................... 603.3.12 Stacker Cover Assy ................................................................................................ 613.3.13 Registration Roller .................................................................................................. 623.3.14 Roller Transfer Assy ............................................................................................... 633.3.15 Fusing Unit ............................................................................................................. 643.3.16 Back-up Roller ........................................................................................................ 653.3.17 Sensor Plate (Inlet) ................................................................................................. 663.3.18 Sensor Plate (Outlet) .............................................................................................. 673.3.19 Manual Feed Guide Assy ....................................................................................... 683.3.20 Sensor Plate (Paper Supply) .................................................................................. 693.3.21 M5B-PCB ............................................................................................................... 703.3.22 Transformer ............................................................................................................ 713.3.23 Power Supply/Sensor Board and Contact Assy ..................................................... 723.3.24 Cassette Guide L Assy ........................................................................................... 733.3.25 Cassette Guide R Assy .......................................................................................... 743.3.26 Spacer Bearing (L/R) .............................................................................................. 75