Oki MB461 MB471 MB491+ MB491 MPS4200MB MPS4700MB Service Manual and Parts Catalog

Accurate, clear and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Present service manual and parts catalog Oki MB461 MB471 MB491+ MB491 MPS4200MB MPS4700MB contain clear instructions and procedures on how to fix the problems occurring in your equipment.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
Table of contents:

1.1 System configuration
1.2 Structure of MFP
1.3 Offer of Options
1.4 Specifications
1.5 Interface specifications
1.5.1 USB Interface Specification Outline of USB Interface USB Interface Connector and Cable USB Interface Signal
1.5.2 Network Interface Specification Outline of Network Interface Network Interface Connector and Cable Network Interface Signal
1.5.3 Telephone Line Interface Specification (MB471/MB471w/MB491) Outline of telephone Line Interface Telephone Line Interface Connector and Cable Telephone Line Interface signal
1.5.4 USB Host Interface Outline of USB Host Interface USB Host Interface Connector USB Host Interface Signal
1.5.5 Wireless LAN Interface(MB451w/MB471w) Outline of Wireless LAN

2.1 Electrophotographic process mechanism
2.2 Printing process
2.3 Toner entrance detection
2.3.1 Toner sensor detection principle
2.3.2 Toner count principle
2.4 Image Scanning process
2.4.1 Structure and process of RADF Cross-section view Electrical configuration Fundamental operations Document detection Jam detection
2.4.2 Document table structure Overview Exposure block Carraige-Assy drive mechanism

3.1 Precautions and Prohibition
3.2 MFP Unpacking Procedure
3.3 MFP Installation Instructions
3.4 Packed Units and Attachments
3.5 Assembly Procedure
3.5.1 MFP Main Body
3.5.2 Power Cable Connection
3.5.3 Installation of Optional Components Second Tray Unit FDI Interface Kit (for MB491 only)
3.6 Configuration Page Print
3.7 Network Information Print
3.8 Connection Procedures
3.9 Checking of User Paper

4.1 Notes on replacement of parts
4.2 Part replacement procedure
4.2.1 Cover Side (L)
4.2.2 Cover Side(R) / SD Card
4.2.3 Board 98M
4.2.4 PWR unit
4.2.5 Cover Stay(R) / Cover Stay(L)
4.2.6 Cover Front (Top)
4.2.7 SW Assy
4.2.8 Scanner unit Tray-assy-document / Cover-ADF-R-assy ADF-unit Sheet-document / Paper-weight-assy / Spring-PW-ADF Hinge-assy-L / Hinge-assy-R Cover-ADF-F / Guide-assy-exit-sub / ADF-assy / ADF board (MHD) Cover-assy-top-ADF / Guide-assy / Roller / Motor / Clutch / Solenoid Guide-A-sub / Frame-assy-separator / Spring-separator / Rubber-friction Cable (ADF-Rev SNS) Cable (ADF-Reg SNS) Frame-assy-OP Frame-OP-panel / OPE board (Except MB461/ES4161) Frame-OP-panel / OPE board (MB461/ES4161) LCD-assy Frame-assy-FB How to remove Battery (SU Board MHE) Frame-assy-hopping-ADF
4.2.9 Plate Stay L / Plate Assy Stay R
4.2.10 LED Head
4.2.11 Frame-Assy-TR
4.2.12 Duplex Belt Assy
4.2.13 DC Motor
4.2.14 Hopping Clutch / MPT Clutch / Regist Clutch
4.2.15 HV-Board / Motor-FAN
4.2.16 Cover Assy Stacker
4.2.17 Stacker Cover
4.2.18 Fuser Assy
4.2.19 MPT Assy, Manual Assy
4.2.20 Cover Assy Rear
4.2.21 Guide Eject Lower Assy
4.2.22 Eject Motor
4.2.23 Plate Side R Assy / Plate Side L Assy / Front Assy
4.2.24 Plate Side L Assy
4.2.25 Plate Side R Assy
4.2.26 Front Assy
4.2.27 Roller Feed Assy
4.2.28 Lever In Sensor / Lever WR Sensor / Photo Interrupter
4.2.29 Paper feeding roller (Roller-Pick-Up, Roller-Feed-NOW, Roller-Assy-MPT)
4.2.30 Frame-Assy-Retard, Spring-Retard
4.2.31 W-LAN Board ( for MB471w only)

5.1 Lubrication point
5.1.1 Printer
5.1.2 Scanner

6.1 Maintenance Menu
6.2 Service Bit Menu
6.3 Maintenance Utility
6.3.1 Maintenance Utility
6.4 Self-diagnostic mode
6.4.1 Operator Panel
6.4.2 Ordinary self-diagnostic mode (level 1) Entering self-diagnostic mode (level 1) Exiting self-diagnostic mode Switch scan test Motor clutch test Test print Consumable item counter display Number of print copies counter display Switching between the Factory mode and the Shipping mode Self-diagnostic function setting LED head serial number display NVRAM parameter setting
6.4.3 Adjustment at part replacement EEPROM data upload / download method
6.5 Switch pressing function when power supply is turned on
6.6 Settings after Parts Replacement
6.6.1 Notes on CU/PU board (98M) replacement
6.6.2 Notes on SU board (MHE)/Scanner Unit replacement

7.1 Periodic Maintenance
7.1.1 Periodic Replacement Parts
7.1.2 Cleaning
7.1.3 Cleaning of LED lens array
7.1.4 Cleaning the Feed rollers and the Retard roller
7.2 Cleaning Rollers in the ADF
7.3 Cleaning the Document Glass

8.1 Precautions prior to repair
8.2 Items to be checked prior to taking action on abnormal images
8.3 Precautions when taking action on abnormal images
8.4 Preparations for troubleshooting
8.5 Troubleshooting method
8.5.1 LCD messages list
8.5.2 Service Call List
8.5.3 Fax Error List
8.5.4 Email/Internet FAX/FAX Server Error List
8.5.5 Preparing for troubleshooting
8.5.6 Print Troubleshooting
8.5.7 Response after Flash compulsive initialization
8.5.8 Copy Image Abnormality Error Troubleshooting
8.5.9 Network Troubleshooting
8.5.10 Wireless Troubleshooting
8.6 Fuse Checking

9.1 Check of resistance values
9.2 Layout of parts
9.3 Firmware Information
9.3.1 ROM control numbers
9.3.2 Instruction of FW update
9.3.3 Checking and indication of the revision number
9.3.4 Stamp of maintenance board indication

10.1 List of Initialized range
10.2 Maintenance Manual for Second Tray unit
10.2.1 Overview Function Exterior and Parts Name
10.2.2 Description for Operation of Second Tray unit
10.2.3 Part Replacement Precautions on replacing parts Arrangement of Parts How to Replace Parts
10.2.4 Cleaning of Paper Feed Roller and Separation Roller
10.2.5 Procedure for Troubleshooting Precautions for Troubleshooting Preparation before Troubleshooting
10.2.6 Connection Diagram Connection diagram Board Arrangement

Parts Catalog

OkiMB461 OkiMB471 OkiMB491+ OkiMB491 OkiMPS4200MB OkiMPS4700MB