Oki B431L6

44983601TH Rev.1
v /
Oki Data CONFIDENTIAL
Contents
1. CONFIGURATION ........................................................................................................1-1
1.1 System Configuration .......................................................................................................................1-1
1.2 Printer Configuration .........................................................................................................................1-2
1.3 Optional Configuration .......................................................................................................................1-4
1.4 Specification ......................................................................................................................................1-5
1.5 Printing display ..................................................................................................................................1-8
1.5.1 VCCI label, Serial No. label .......................................................................................................1-8
1.5.2 Warning label ............................................................................................................................1-8
1.5.3 Warning / Caution display .........................................................................................................1-9
2. Operational explanation ................................................................................................2-1
2.1 Electrophotographic process mechanism ........................................................................................2-1
2.2 Printing process ................................................................................................................................2-7
2.3 Toner entrance detection .................................................................................................................2-11
3. Parts replacement .........................................................................................................3-1
3.1 Preparation for parts replacement ..................................................................................................... 3-1
3.2 Parts layout .......................................................................................................................................3-3
3.3 Parts replacement method ................................................................................................................3-5
3.3.1 LED Head ..................................................................................................................................3-6
3.3.2 Roller-Transfer ...........................................................................................................................3-7
3.3.3 Duplex Belt ................................................................................................................................3-8
3.3.4 Cover-Side-R.............................................................................................................................3-9
3.3.5 Cover-Side-L ...........................................................................................................................3-10
3.3.6 CU-Board ................................................................................................................................3-11
3.3.7 PWB unit - ACDC Switch ........................................................................................................3-12
3.3.8 DC Motor ................................................................................................................................3-13
3.3.9 Hopping / MPT / Regist Clutch ...............................................................................................3-14
3.3.10 HV-Board / Motor-FAN ..........................................................................................................3-15
3.3.11 Cover Assy OPE ....................................................................................................................3-16
3.3.12 Ope PCB Assy ( B431 ) ..........................................................................................................3-17
3.3.13 Cover Assy Stacker .................................................................................................................3-18
3.3.14 Stacker Cover .......................................................................................................................... 3-20
3.3.15 Fuser Assy ..............................................................................................................................3-21
3.3.16 MPT Assy , Manual Assy) .......................................................................................................3-22
3.3.17 Cover Assy Rear .....................................................................................................................3-23
3.3.18 Guide Eject Lower Assy ..........................................................................................................3-25
3.3.19 Eject Motor ..............................................................................................................................3-26
3.3.20 Plate Side R Assy / Plate Side L Assy / Front Assy ................................................................3-27
3.3.21 Plate Side L Assy ....................................................................................................................3-28
3.3.22 Plate Side R Assy ...................................................................................................................3-29
3.3.23 Roller Regist ............................................................................................................................3-30
3.3.24 Roller Feed Assy .....................................................................................................................3-31
Contents