Oki MB770 User manual

MB770 / MB770+
MPS5502 / MPS5502+
MC770 / MB770+
MC780 / MC780+
MPS3537 / MPS3537+
MPS4242 / MPS4242+
Finisher Maintenance Manual
MJ-1038
Rev 2

45372301TH Rev.2 iii /
Oki Data CONFIDENTIAL
TRADEMARKS
• Molykote is a registered trademark of Dow Corning Corporation.
• Other company names and product names in this manual are the trademarks of their respective
companies.
© 2013 OKI DATA CORPORATION All rights reserved
Under the copyright laws, this manual cannot be reproduced in any form without prior written
permission of OKI DATA CORPORATION.

45372301TH Rev.2 vi /
Oki Data CONFIDENTIAL
CONTENTS
MJ-1038
1. SPECIFICATIONS, ACCESSORY AND CONSUMABLES.......................................... 1-1
1.1 Specifications....................................................................................................................... 1-1
1.2 Accessory ............................................................................................................................ 1-3
1.3 Consumables....................................................................................................................... 1-4
2. GENERAL DESCRIPTION............................................................................................ 2-1
2.1 Main Components................................................................................................................ 2-1
2.2 Sectional View ..................................................................................................................... 2-2
2.3 Electric Parts Layout............................................................................................................ 2-4
2.4 Symbols and Functions of Various Components................................................................. 2-6
2.5 Diagram of Signal Blocks..................................................................................................... 2-8
3. DESCRIPTION OF OPERATIONS ............................................................................... 3-1
3.1 Basic Operations ................................................................................................................. 3-1
3.1.1 Specifications ......................................................................................................... 3-1
3.1.2 Transport drive system - General description ........................................................ 3-2
3.1.3 Jam detection ......................................................................................................... 3-9
4. DISASSEMBLY AND INSTALLATION......................................................................... 4-1
4.1 Disassembly and Replacement of Covers........................................................................... 4-1
4.1.1 Upper cover............................................................................................................ 4-1
4.1.2 Right cover ............................................................................................................. 4-1
4.1.3 Left cover................................................................................................................ 4-2
4.2 Disassembly and Replacement of Sensors and Switches................................................... 4-3
4.2.1 Guide upper ASSY ................................................................................................. 4-3
4.2.2 Guide rear ASSY.................................................................................................... 4-3
4.2.3 Entrance transport sensor (S1) .............................................................................. 4-6
4.2.4 Exit transport sensor (S2)....................................................................................... 4-6
4.2.5 Alignment plate home position sensor (R) (S4)...................................................... 4-7
4.2.6 Alignment plate home position sensor (L) (S5) ...................................................... 4-7
4.2.7 Ejector home position sensor (S7) ......................................................................... 4-8
4.2.8 Ejector encoder sensor (S8)................................................................................. 4-10
4.2.9 Stapler paper sensor (S14) .................................................................................. 4-13
4.2.10 Stack home position sensor (S9) ......................................................................... 4-15
4.2.11 Paper support home position sensor (S6) ............................................................ 4-17
4.2.12 Door switch (SW2) ............................................................................................... 4-20
4.2.13 Stacker tray lower limit switch (SW1) ................................................................... 4-20
4.2.14 Lever path home position sensor (S15) ............................................................... 4-21
4.3 Disassembly and Replacement of motors ......................................................................... 4-22
4.3.1 Entrance transport motor (M1) ............................................................................. 4-22
4.3.2 Exit transport motor (M2)...................................................................................... 4-22
4.3.3 Alignment motor (R) (M4)..................................................................................... 4-23
4.3.4 Alignment motor (L) (M5) ..................................................................................... 4-25
4.3.5 Paddle motor (M3)................................................................................................ 4-27
4.3.6 Paper support motor (M6) .................................................................................... 4-28
4.3.7 Ejector motor (M7)................................................................................................ 4-31
4.3.8 Stacker motor (M8)............................................................................................... 4-34
4.3.9 Lever path motor (M10)........................................................................................ 4-35
4.4 Disassembly and Replacement of transport system.......................................................... 4-37
4.4.1 Entrance transport roller....................................................................................... 4-37
4.4.2 Exit Transport roller .............................................................................................. 4-38
4.4.3 Exit roller (PM)...................................................................................................... 4-39
4.4.4 Sub paddle ........................................................................................................... 4-41

45372301TH Rev.2 vii /
Oki Data CONFIDENTIAL
4.4.5 Main paddle (PM) ................................................................................................. 4-42
4.4.6 SCU paddle .......................................................................................................... 4-43
4.5 Disassembly and Replacement of Others ......................................................................... 4-45
4.5.1 Finisher control PC board ASSY .......................................................................... 4-45
4.5.2 Finisher control PC board..................................................................................... 4-45
4.5.3 Stapler .................................................................................................................. 4-46
5. ADJUSTMENT .............................................................................................................. 5-1
5.1 Stapling Position Misalignment............................................................................................ 5-1
6. TROUBLESHOOTING .................................................................................................. 6-1
6.1 Troubleshooting................................................................................................................... 6-1
6.2 Alarm ................................................................................................................................. 6-14
6.3 Other.................................................................................................................................. 6-14
7. PREVENTIVE MAINTENANCE (PM) / FIRMWARE UPDATE ..................................... 7-1
7.1 PM Parts.............................................................................................................................. 7-1
7.2 Consumables and Duration ................................................................................................. 7-1
7.2.1 Finisher section ...................................................................................................... 7-1
7.3 Maintenance by Customers ................................................................................................. 7-1
7.4 Maintenance and Inspection Points..................................................................................... 7-1
7.5 Grease................................................................................................................................. 7-2
7.6 Firmware Update ................................................................................................................. 7-2
8. ELECTRIC CIRCUIT ..................................................................................................... 8-1
8.1 Harness Diagram................................................................................................................. 8-1
8.2 Circuit Diagram .................................................................................................................... 8-4
8.3 PC Boards ........................................................................................................................... 8-9
8.4 Electric Signals .................................................................................................................. 8-10
8.4.1 Finisher section .................................................................................................... 8-10

45372301TH Rev.2 1-1 /
Oki Data CONFIDENTIAL
1. SPECIFICATIONS, ACCESSORY AND CONSUMABLES
1.1 Specifications
• Product Type Inner Finisher (1 trays)
• Paper Stacking Device Stationary Tray
• Paper Size A4, A5, B5, Executive, Folio, LG13", LG13.5", LG14", LT, Statement, 16K
(195 × 270)
• Paper Basis Weight 64 - 220 g/m2(17 lb. Bond to 58 lb. Bond)
• Stacking Mode Simple, Offset, Staple and composite
• Dimensions W386.7 × D579* × H212 (mm)
* with stacker tray.
• Gross Weight 8.3 kg (18.29 lb)
• Power Supply DC24V10% and DC5V5% supplied from the main equipment.
• Power Consumption DC24V 40W or less
5V 2.6W or less
• Stacking Type Facedown
• Stacking Height with
- Considered full when STACK TRAY reaches lower limit in excess of specifications noted here.
- Exceeding maximum number of continuous batches of staples is not covered by the warranty.
- The Tray movement is a 71 mm motion vertically from the Home position.
Fig. 1-1
Operation Mode Sheets loaded Remarks
Non-Sort, Offset Minimum 500 sheets, or 71 mm STACK TRAY movement When using 80 g/m2
Staple STACK TRAY movement 71 mm, up to 20 continuous batches When using 80 g/m2
71mm