Oki 4M, 4W PLUS

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3.3.17 Base Plate

(1) Dismount the upper cover assy. (See Section 3.3.4.)

(2) Dismount the base frame. (See Section 3.3.12.)

(3) Remove two screws 1, disconnect connector 2, and dismount power supply unit 3.

(4) Dismount insulation sheet 4.

(5) Remove two screws 5 and dismount main control board 6 from base plate 7.

Contents

Main Page Page CONTENTS Page Page 1. CONFIGURATION 1.1 System Configuration 1.2 Printer Configuration Page 1.4 Specification Page 1.5 Safety Standards Page 2. OPERATION DESCRIPTION 2 - 2 <Power Supply Unit> Figure 2-1 Block Diagram (OKIPAGE 4w Plus) <Main Control Board> M 2 - 3 Figure 2-1 Block Diagram (OKIPAGE 4m) <Main Control Board> <Power Supply Unit> M 2.1 Main Control Board 2.2 Power Supply Unit 2.3 High-Voltage Power Supply Board Page 2.4 Electro-Photographic Processor 2 - 8 Figure 2-3 Layout Drawing of Electro-Photographic Processor Page 2 - 10 Figure 2-4 Schematic Drawing of OKIPAGE4w Plus/4m Paper Feeding 2.5 Electro-Photographic Process 2 - 12 Figure 2-5 Flow for Electro-Photographic Process Page Page Page Page Page Page 2 - 19 2.6 Paper Jam Detection 2 - 20 Timing Chart for Paper Feed (Tray Feed) 2.7 Toner Low Detection 2.8 Cover Open Page 3. PARTS REPLACEMENT 3.1 Precautions for Parts Replacement 3 - 2 [Maintenance Utility] Table 3-2 Maintenance Utility Page 3 - 4 [Base Frame Unit] Figure 3-2 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 4. ADJUSTMENT 4.1 Adjustment Types and Functions Page 4.2 Adjustment When Replacing a Part Page Page Page 5. PERIODICAL MAINTENANCE 5.1 Periodical Replacement Parts 5.2 Cleaning Page Page 6. TROUBLESHOOTING PROCEDURES 6.1 Troubleshooting Tips 6.2 Check Points Before Correcting Image Problems 6.3 Notes When Correcting Image Problems 6.4 Preparation Before Troubleshooting 6.5 Troubleshooting 6 - 3 Table 6-1 Note: 6 - 4 Table 6-1 (Cont'd) 6 - 5 Table 6-1 (Cont'd) Page 1The OKIPAGE 4w Plus/4m malfunctions after the power supply has been turned on. [JAM error] 2-1 Paper input jam Page [JAM error] 2-2 Paper feed jam 2-3 Paper exit jam 3Paper size error 4Heat assy error Page 1An image is light or blurred entirely. 2Dark background density 3A blank paper is output. 4Vertical black belt/stripe 5Cyclic defect 6A blank paper is output. 7Poor fusing 8Vertical white belt/spripe Page Page Page 7 - 1 7. WIRING DIAGRAM 7.1 (a)Interconnect Signal Diagram (OKIPAGE 4w Plus) Switch Charge Roller OPC Drum Main Control Board CN9 (Not Used) (HBMC-2 PCB) Power Supply Unit High-Voltage Power Supply Board Main Control Board CN9 (Not Used) (HBMC-2 PCB) Power Supply Unit High-Voltage Power Supply Board 7.2 PCB Layout 7 - 4 7.2 PCB Layout 7.2.2 Main Control Board (HBMC-3 PCB) (OKIPAGE 4m) Page Page Page Page Page 8 - 4 Table 8-2 Base Frame Unit 8 - 5 Page Page Page 8 - 9 Table 8-4 Base Plate Unit Page Page Appendix B PARALLEL INTERFACE Page Page Page AppendixC Macintosh INTERFACE (OKIPAGE 4m) Page Appendix D MAINTENANCE UTILITY 1. OUTLINE OF MAINTENANCE UTILITY 2. ROLE OF MAINTENANCE UTILITY 3. OUTLINE OF MAINTENANCE UTILITY FUNCTIONS 4. DETAIL OF EACH FUNCTION 4.1 Engine Menu Setting 4.2 Engine Counter 4.3 Printer Status 4.4 Test Print 4.5 Option