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LED Page PrintersService Manual
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Service Guide OL830Plus/OL850
Chapter 0 About This Manual
OL830Plus // OL850
LED Page Printers
Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 09/17/97
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi, which is ideal for printing, but does not view on most displays well.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Table of Contents
Page
Service Guide OL830Plus/OL850
0 About This Manual Front Cover Manual Copyright 1 Product Specifications 1.1 General Description 1.2 Specifications 1.3 Paper Specifications 1.4 Physical Specifications 1.5 Power Requirements 1.6 Environmental Conditions 1.7 Agency Approvals 1.8 Options 1.9 Memory Specifications 1.10 Consumables 1.11 Printer Reliability 2 Principles of Operation 2.1 Principles of Operation - Printer Overview 2.2 Control Unit (CU) ....2.2.01 Main Controller Board Overview ....2.2.02 Main Controller Board Functions ....2.2.03 Optional Extended RAM Board (REXM) ....2.2.04 Font Card 2.3 Printer Unit (PU) ....2.3.01 Engine Board Controller (LLAT) ....2.3.02 Engine Controller Board Operations ....2.3.03 EEPROM Operation ....2.3.04 Power Supply Unit ....2.3.05 Fuser Unit ....2.3.06 Main Motor (Drum Motor) ....2.3.07 LED Array ....2.3.08 Resist Motor ....2.3.09 DC Fan ....2.3.10 Operation Panel ....2.3.11 Second Paper Tray Mechanism 2.4 Mechanical Operation Description ....2.4.02 OL830-Plus/850 Printing Process ....2.4.03 Process Descriptions 2.5 Sensors And Switches ....2.5.02 Sensor Functions 3 Maintenance & Disassembly 3.1 Maintenance - General Information ....3.1.02 Maintenance Tools 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
Table of Contents ....3.1.03 Maintenance Precautions 3.2 Disassembly/Assembly Procedures - General Information ....3.2.01 Preliminary Items ....3.2.02 Upper Cover ....3.2.03 Stacker Open Switch Assembly ....3.2.04 LED Head ....3.2.05 RS232 Interface Board (APSR) ....3.2.06 RAM Expansion Circuit Board (REXM) Option ....3.2.07 Emulation Board (APSH) ....3.2.08 Main Controller Board (APSM) ....3.2.09 Engine Controller Board (LLAT) ....3.2.10 Pulse Motor (Main) ....3.2.11 Idle Gear A, Idle Gear B, and Speed Reduction Gear ....3.2.12 DC Fan Assembly ....3.2.13 Power Supply Unit ....3.2.14 Cover Open Microswitch Assembly ....3.2.15 Paper Eject Roller Assembly ....3.2.16 Paper Eject Sensor Lever and Rollers ....3.2.17 Upper Unit ....3.2.18 Cover Open Switch Actuator ....3.2.19 Paper Eject Sensor Levers B and C ....3.2.20 Fusing Unit ....3.2.21 Metal Pressure Roller Assembly ....3.2.22 Resist Sensor Lever and Toner Sensor Lever ....3.2.23 Lock Lever Assembly ....3.2.24 LED Head Holder ....3.2.25 LED Holder Ground Plate ....3.2.26 Back-up Roller Assembly ....3.2.27 Transfer Charger Assembly ....3.2.28 Registration Roller Assembly ....3.2.29 High Voltage Connector ....3.2.30 Idle Gear and Post ....3.2.31 Paper Delivery Unit ....3.2.32 Resist Motor ....3.2.33 Engine Connector Board, LLCC ....3.2.34 Hopping Roller A ....3.2.35 Separator ....3.2.36 Base Frame ....3.2.37 Ozone Filter ....3.2.38 Second Paper Feed Unit (Option) ....3.2.39 Boards and Connectors (Second Paper Feed Unit) ....3.2.40 Paper Delivery Unit (Second Paper Feed Unit) ....3.2.41 Cassette Spring (Second Paper Delivery Unit) ....3.2.42 Resist Motor (Second Paper Delivery Unit)
Page 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
Table of Contents ....3.2.43 Control Board, LLFC (Second Paper Delivery Unit) ....3.2.44 Hopping Roller (Second Paper Delivery Unit) ....3.2.45 Separator (Second Paper Delivery Unit) 3.3 Adjustments And Service Settings ....3.3.02 Actual Page Count ....3.3.03 Modified Page Count ....3.3.04 Drum Counter Reset ....3.3.05 Fuser Counter Reset ....3.3.06 Vertical Print Start Position Adjustment ....3.3.07 Darkness Control ....3.3.08 Smoothing Select ....3.3.09 Setting the LED Head Drive Time ....3.3.10 DC Voltage Check (+5 vdc) 3.4 Cleaning ....3.4.02 Cleaning Table ....3.4.03 Static Charger ....3.4.04 Hopping Roller ....3.4.05 Printer Unit ....3.4.06 Transfer Charger ....3.4.07 LED Lens Array 3.5 Lubrication 4 Failure & Repair Analysis 4.1 Overview 4.2 Troubleshooting Updates - General Information ....4.2.02 Okilink II ....4.2.03 Faxable Facts ....4.2.04 Technical Service Bulletins 4.3 Reporting Problems - General Information ....4.3.02 Problem Lists ....4.3.03 Reporting Methods 4.4 Troubleshooting Tips - Preliminary Checks ....4.4.02 Tips for Preventing Image Problems 4.5 LCD Error Messages - Using The Error Message Charts ....4.5.02 Error Messages (Service Lamp ON) ....4.5.03 Error Messages (Service Lamp OFF) ....4.5.04 Samples of Abnormal Output 4.6 Repair Analysis Procedures Using The RAPS ....4.6.02 RAP Index ....4.6.03 Start Here Flowchart ........RAP 01: Printer Does Not Initialize ........RAP 02: Paper Feed Jam ........RAP 03: Paper Jam ........RAP 04: Paper Size Error ........RAP 05: Fusing Problem
Page 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
Table of Contents ........RAP 06: PU Error ........RAP 07: Operator Panel Communication Error ........RAP 08: Communication Error Between PU and CU ........RAP 09: Loop Test Failure (RS-232C) ........RAP 10: Resident/Optional RAM Failure ........RAP 11: Program ROM Failure ........RAP 12: Optional Font Card Failure ........RAP 13: Receive Buffer Overflow ........RAP 14: No Display on Operator Panel ........RAP 15: Images are Light or Blurred ........RAP 16: Dark Background Density ........RAP 17: Blank Paper is Output ........RAP 18: Black Vertical Stripes ........RAP 19: Evenly Spaced Marks on Output ........RAP 20: Random Missing Output ........RAP 21: White Vertical Stripes ........RAP 22: Black Page is Output 4.7 Printer Tests ....4.7.02 Continuous Print (Rolling ASCII) Test ....4.7.03 Serial Interface Diagnostic ....4.7.04 Engine Test - A ....4.7.05 Engine Test - B ....4.7.06 Menu Print ....4.7.07 Demo Page Print A Board Diagrams A.1 Board Diagrams - General Information A.2 Index To Charts ....A.2.01 Main Controller Board (APSM) ....A.2.02 Engine Control Board (LLAT) ....A.2.03 Operator Panel Board (LLJB) ....A.2.04 Engine Connection Board (LLCC) ....A.2.05 Power Connection Board (LLID) ....A.2.06 AppleTalk/Serial Interface Board (APSR) ....A.2.07 Memory Expansion Board (REXM) Option ....A.2.08 Emulation Board (APSH) ....A.2.09 Power Supply Unit ....A.2.10 Second Paper Supply Unit Board (LLIG) ....A.2.11 Second Paper Supply Unit Board (LLFC) ....A.2.12 Second Paper Supply Unit Board (LLIF) B Illustrated Parts Listing B.1 Illustrated Parts Listing - General Information ....B.1.02 Definitions of Terms ....B.1.03 Parts Ordering Information B.2 Charts
Page 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
Table of Contents ....B.2.01 Printer Unit ....B.2.02 Paper Trays ....B.2.03 Upper Unit (1 of 2) ....B.2.04 Upper Unit (2 of 2) ....B.2.05 LED Holder ....B.2.06 Lower Unit (1 of 2) ....B.2.07 Lower Unit (2 of 2) ....B.2.08 Boards ....B.2.09 Paper Eject Roller Assembly ....B.2.10 Paper Delivery Unit ....B.2.11 Second Paper Feed Unit ....B.2.12 Packing Materials ....B.2.13 Consumables ....B.2.14 Options
Page 168 169 170 171 172 173 174 175 176 177 178 179 180 181
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Service Guide OL830Plus/OL850
Chapter 0 About This Manual
Manual Copyright This document may not be reproduced without written permission of the Okidataź Technical Training Group. Every effort has been made to ensure the accuracy of the information contained in this training course. Okidata is not responsible for errors beyond our control. © 1994 by Okidata All rights reserved. Second Edition April, 1994 Written and produced by the Okidata Technical Training Group Please send any comments on this publication to the address listed below. Technical Training Group Okidata 532 Fellowship Road Mount Laurel, NJ 08054-3499 Facsimile Number: (609) 235-2600, ext. 7034. Okilink Login Name: Technical Training OKI is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. OKIDATA is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. MICROLINE is a registered trademark of Oki Electric Industry Company, Ltd.; marque depose de Oki Electric Industry Company, Ltd. Adobe and PostScript are trademarks of Adobe Systems Incorporated, which may be registered in certain jurisdictions. Hewlett-Packard, HP, and LaserJet are registered trademarks of the Hewlett-Packard Company. Bitstream is a registered trademark of Bitstream Incorporated. IBM and PC are registered trademarks of International Business Machine Corporation. MS-DOS is a registered trademark of Microsoft Corporation.
PC is a registered trademark of International Business Machine Corporation. Windows is a trademark of Microsoft Corporation Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.1 GENERAL DESCRIPTION 1.1.01 General Information The OL830-Plus and OL850 are desktop page printers, which use a stationary LED head and dry electrophotography as their exposure and development methods. The printers have a resolution of 300 x 300 dots per inch and a continuous print speed of 8 letter-sized sheets per minute. A two megabyte page memory is standard on the OL830-Plus and OL850 Printers. This can be expanded to a total of four megabytes of printer memory. The OL830-Plus and OL850 feature Oki Smoothing Technology (OST). The OST LED head provides edge smoothing to reduce the jagged stair step effects of bit mapped images for improved print quality. The OST capability is selected through the Smoothing option of the printer menu. The default setting is Smoothing On. The OL830-Plus provides PostScript capability, along with HP LJII and Diablo 630 ECS emulations. Seventeen Adobe PostScript fonts are standard on the OL830-Plus. In HP LaserJet II emulation, 26 bit-mapped fonts are available. The Diablo emulation includes 18 bit-mapped fonts. A Centronics Parallel Interface is standard on the OL830-Plus. The OL850 provides PostScript capability, along with HP LJII and Diablo 630 ECS emulations. Sixty-five Adobe PostScript fonts (35 resident and 30 down-loadable) are standard on the OL850. In HP LaserJet II emulation, 26 bit-mapped fonts are available. The Diablo emulation includes 18 bit-mapped fonts. A Centronics parallel interface and an AppleTalk/ Serial Interface are standard on the OL850. Each printer contains a font card slot. A variety of optional font cards are available. The OL830-Plus and the OL850 also accept downloadable fonts. Two consumable kits are used in the printers. The toner cartridge kit contains a toner cartridge, a fuser cleaner pad, and an LED lens cleaner. The other consumable package, the image drum cartridge kit, includes an image drum cartridge and an ozone filter. A letter-size paper tray is included with each printer. Legal, envelope, executive, and A4 trays are also available. Paper feeding can be done automatically or manually. A second paper feed unit is also available. The printers will print on a variety of paper types, labels, envelopes, and transparencies. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.2 SPECIFICATIONS 1.2.01 Print Specifications · Exposure method: Stationary LED Head · Development method: Dry electrophotography 1.2.02 Print Speed · First print: 14 seconds typical (letter size paper after warm-up) · Continuous print: 8 sheets per minute (letter size) · Warm-up time: 50 seconds 1.2.03 Paper Feed Methods · Automatic Feed · Manual Feed 1.2.04 Paper Delivery Methods · Face down · Face up 1.2.05 Print Resolution · 300 x 300 dots/inch 1.2.06 Emulations OL830-Plus · Adobe PostScript · HP LaserJet II · Diablo 630 ECS OL850 · Adobe PostScript · HP LaserJet II · Diablo 630 ECS 1.2.07 Symbol Sets · HP II Emulation - US ASCII - ROMAN-8
- ROMAN EXTENSION - LEGAL - HP German - HP Spanish - INTERNATIONAL - IBM Character · Diablo Emulation - Courier - Courier Legal - Multi-purpose 10 1.2.08 Available Fonts OL830 · PostScript: 17 fonts / 5 families · HP II Emulation: 26 bit-mapped fonts / 4 faces · Diablo 630 ECS Emulation: 18 bit-mapped fonts OL850 · PostScript: 65 fonts / 26 families 35 resident fonts 30 software fonts · HP II Emulation: 26 bit-mapped fonts / 4 faces · Diablo 630 ECS Emulation: 18 bit-mapped fonts 1.2.09 Interface Methods · Centronics Parallel Interface · AppleTalk - RS422 / RS-232C Interface (optional for OL830-Plus) Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.3 PAPER SPECIFICATIONS 1.3.01 Paper Types · Letter - Size: 8.5" x 11" (216 mm x 279 mm) - Feed: Automatic or Manual - Weight Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75g/m 2 ) · Legal - Size: 8.5" x 14" (216 mm x 356 mm) - Feed: Automatic (with optional paper tray) or Manual - Weight Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75g/m 2 ) · Executive - Size: 7.25" x 10.5" (184 mm x 267 mm) - Feed: Automatic (with optional paper tray) or Manual - Weight Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75g/m 2 )
· A4 - Size: 8.27" x 11.69" (210 mm x 297 mm) - Feed: Automatic (with optional paper tray) or Manual - Weight Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75g/m 2 ) · Envelope - Size Minimum: 3.5" x 7.5" (89 mm x 191 mm) Maximum: 7.2" x 10.1" (183 mm x 257 mm) - Feed: Automatic (with optional paper tray) or Manual - Weight Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75g/m 2 ) · Labels - Manual feed / Face up delivery only - Use labels designed specifically for laser printers. · Transparencies - Manual feed / Face up delivery only - Must be able to withstand the heat of the fusing process. CAUTION:
Envelopes, labels, and transparencies should only be fed from the top paper tray.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.4 PHYSICAL SPECIFICATIONS 1.4.01 Outside Dimensions · Width: 17.72" (450 mm) · Height: 6.02" (153 mm) · Depth: 23.4" (450 mm) [includes letter size paper tray] 1.4.02 Printer Weight · 24 pounds without options (approximately 11 kg) · 41 pounds with second paper feed unit and second paper tray (approximately 19 kg) 1.4.03 LED Array · Number of LED Elements: 2560 CAUTION: The OST LED Head for the OL830-Plus / OL850 is not interchangeable with non-OST LED Page Printers. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.5 POWER REQUIREMENTS 1.5.01 Input Power · 120 VAC +5.5%, -15% · 220/240 VAC +/-10% 1.5.02 Power Consumption · Approximately 800 W maximum during operation · Approximately 22 W maximum during stand-by (Fuser is OFF) Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.6 ENVIRONMENTAL CONDITIONS 1.6.01 Ambient Temperature and Relative Humidity · While operating: - 50° to 90° F - 10° to 32° C - 20 to 80% Relative Humidity · While in storage: - -4° to 110° F - -20° to 43° C 1.6.02 Printer Noise Level · In operation: 52 dB maximum · In stand-by (QUIET Mode): 43 dB maximum · In stand-by (Non-QUIET Mode): 45 dB maximum Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.7 AGENCY APPROVALS
· 120 VAC Type - FCC Class B - UL478 Version 5 (Partial Version 4) - CSA 22.2 - 220 - Radio Interference Regulations of Canadian Department of Communications · 220/240 VAC Type - FCC Class A Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.8 OPTIONS 1.8.01 RAM Expansion Board · RAM Expansion Board (REXM): Two Mbyte 1.8.02 Font Card · Refer to Printer Handbook - Appendix G or Okilink II for a listing of available cards. 1.8.03 AppleTalk / Serial Interface Board · This board is standard on the OL850 Printer · RS-232C Serial: Provides serial communication capability at speeds up to 19.2 Kbps · AppleTalk / RS-422 (accessed in PostScript Mode only) 1.8.04 Second Paper Feed Mechanism · The second paper feed mechanism allows paper feeding from two paper trays. A second paper tray must be purchased for use with the second paper feed mechanism. 1.8.05 Paper Trays · Letter size · Legal size · Envelope · Executive · A4 Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.9 MEMORY SPECIFICATIONS 1.9.01 ROM (Read Only Memory) · Main Controller Program Rom - OL830-Plus 1 Mbyte - OL850 1 Mbyte · Engine Controller ROM - Not used; masked to the CPU 1.9.02 RAM (Random Access Memory) · Resident RAM = 2 Mbytes · Expansion RAM (Option) - 2 Mbytes (RAM Expansion Board) 1.9.03 EEPROM (Electrically Erasable Programmable Read Only Memory) · Main Controller EEPROM - 1024 x 1 bit serial input/output · Engine Controller EEPROM - 1024 x 1 bit serial input/output Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.10 CONSUMABLES 1.10.01 Image Drum Cartridge Kit Includes: · Image Drum Cartridge · Ozone Filter 1.10.02 Toner Cartridge Kit Includes: · Toner Cartridge · Fuser Cleaner Pad · LED Lens Cleaning Pad 1.10.03 Toner Toxicity · No carcinogin is contained Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 1 Product Specifications
1.11 PRINTER RELIABILITY 1.11.01 Mean Pages Between Failure (MPBF) · Approximately 32,000 pages 1.11.02 Mean Time To Repair (MTTR) · Approximately 20 minutes 1.11.03 Estimated Printer Life · Five Years or approximately 300,000 pages 1.11.04 Estimated Fuser Life · Approximately 180,000 pages 1.11.05 Printer Duty Cycle · Approximately 12,000 pages per month @ 5% print density Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.1 PRINTER OVERVIEW 2.1.01 General Information This section describes the operation of the OL830-Plus/850 in the order listed below. · Control Unit (CU) · Printer Unit (PU) · Mechanical Operation of the OL830-Plus/850 · OL830-Plus/850 Sensors and Switches Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.2 CONTROL UNIT (CU) The control unit regulates the reception of data from the host system interface. After receiving data and commands from the host system, the CU generates bit image data. The CU transfers data and commands to the Printer Unit (PU). The principal hardware components of the CU are listed below. · Main controller board · Serial interface board (Option on OL830-Plus) · Emulation board · Extended RAM board (Option) · Font card (Option)
Control Unit (CU) - Block Diagram
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.2.01 Main Controller Board Overview The major components of the main controller board consist of a 25 Mhz oscillator, a Motorola 68000 Microprocessor (CPU), two 1 Mbyte Program ROMs (4 PROMs are used on the OL850), 2 Mbyte of RAM, an EEPROM, and a two Gate Arrays. The main controller board is connected to the host system through a Centronics parallel interface or the RS-232C serial / RS422 / AppleTalk interface. The RS232/RS422/AppleTalk interface is standard on the OL850. The main controller board is connected to the printer unit via CN7 on the main controller board and J7 on the printer units engine controller board. Two Gate Arrays are located on the main control board. The Gate Arrays can read/write/ process data simultaneously in accordance with the 12.5 Mhz clock pulse. The Gate Arrays control the following functions: · Gate Array #1 - Controls reading data from, and writing data to, the dynamic RAM - Provides the dynamic RAM refresh - Sends a 12.5 Mhz clock signal to the microprocessor. This clock pulse governs the processing and executing of commands by the CPU. · Gate Array #2 - Reads/Writes data from/to the EEPROM. The EEPROM, located on the main controller board, stores the default interface protocol information. - Controls the printer interface (parallel, serial and AppleTalk) - Controls the printer unit Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.2.02 Main Controller Board Functions - Reception control - Command analysis processing - Font processing - Raster buffer read operation - Engine interface (I/F) processing - Operation panel control Reception Control I-PRIME: Enable/Disable of the parallel interface port can be specified through the menu. The RS-232C serial interface baud rate, parity, and busy control protocol are selected through the menu. The RS422 / AppleTalk interface is active only in the PostScript operating mode. Command Analysis Processing The OL830-Plus/850 has the following emulation modes: · PostScript · Laser Jet Series II: Hewlett Packard · Diablo 630 ECS Font Processing Outline fonts are used with the PostScript interpreter. Bit mapped fonts are available for HPLJ-II and Diablo emulations. Raster Buffer Read Operation Bit images written in the raster buffer are converted to serial data. The contents of the registers are transferred to the engine controller board. Engine Interface (I/F) Provides a control signal which governs the operation of the engine controller board when printing is requested. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.2.03 Optional Extended RAM Board (REXM) The extended RAM Board (REXM) contains 2 Mbyte of RAM. This board, plus the resident RAM on the main controller board, extends the RAM capacity to 4 Mbytes. The CPU detects the extended RAM board by sending the MEMEXIST signal. The RAM capacity is identified during the power-on sequence, and can be verified by the operator by requesting a MENU PRINT operation. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.2.04 Font Card An optional font card (for additional bit mapped/scalable fonts) can be attached to the main control board. The printer must be OFF-LINE (the READY lamp is off) before the card can be inserted or removed. If the font card is inserted or removed while the printer is ON- LINE (the READY lamp is on), a CARD REMOVED ON-LINE error message will appear on the operator panel display. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3 PRINTER UNIT (PU) The principal hardware components of the printer unit are listed below. · Engine controller board · Power supply unit · Fuser unit · Main motor · LED array · Resist motor · DC fan · Operation panel · Second paper tray mechanism (Option) · Image drum cartridge · Sensors and Switches Toner end sensor, inlet sensor, outlet sensor, paper out sensor, paper tray identification switch, cover open switch). Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.01 Engine Board Controller (LLAT) The PUs engine controller board contains an eight bit microprocessor (which has 128 Kbyte of internal RAM, 32 I/O ports, and 5 interrupt lines). The engine controller board also contains a one Kbyte EEPROM, a 120 pin LSI (which contains 36 I/O ports), two drivers (IC5/IC8), toner end sensor, inlet sensor, outlet sensor, comparator IC7, latch IC4, four driver transistors T21-T24, and two oscillators OSC1/OSC2.
Printer Unit (PU) - Block Diagram
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.02 Engine Controller Board Operations After receiving signals and commands from the CUs main controller board, the microprocessor executes the commands. The CPU performs its operations in conjunction with OSC1, an LSI, and the program ROM. The engine controller board enables the fuser lamp and activates the preliminary print circuits. Upon the completion of the preliminary print functions, the engine controller board enables the LED array in conformance with the signals and commands received from the main controller board. The LED array illuminates, leaving a latent image on the photosensitive drum. The engine controller board also controls paper feed, paper transfer, and EP processing action. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.03 EEPROM Operation The 128 Byte Electrically Erasable PROM (EEPROM) is loaded with the following data: · Total number of sheets printed after installation · Modified page count · Total number of sheets printed with the current drum · Total number of sheets printed with the current fuser · Setting of time required from the completion of printing to Quiet Mode · Feed time needed to feed the paper to a printable position · Vertical registration · LED array drive time.
The data stored in the EEPROM can be accessed by using SW1 on the engine controller board to place the printer in the Maintenance Mode (See Section 3 of the Service Handbook). The count of the total number of sheets printed with the drum currently in use should be taken as a rough measure of the useful life of the drum. Place the printer into Emulation ode. The drum counter will be set to zero by holding down the RESET switch and turning the power switch ON. This operation cannot be performed in PostScript Mode.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.04 Power Supply Unit The power supply unit generates the following voltages from the AC input voltage: Voltage +5vdc +12vdc -12vdc +38vdc +5Kvdc -6Kvdc -700vdc -550,-400vdc High-voltage Drive The high-voltage circuit supplies the drum charge voltage (about -6 Kvdc) and the transfer charge voltage (about +5 Kvdc). These two charge voltages are generated by a high-voltage power supply unit, which is attached to the power supply unit. The grid is connected to ground via a varistor which maintains the grid at about -700 vdc during charging. The medium voltage circuit provides the grid voltage (about -700 vdc), and developer bias voltages (about -550 vdc and -400 vdc). Power Supply - Block Diagram Purpose: Logic Levels Interface Line Voltage Interface Line Voltage Motor/Fan Drive Voltage: High Voltage Source Transfer Charge Voltage Drum Charge Voltage Charge Grid Voltage Developer Bias Voltages
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Chapter 2 Principles of Operation
2.3.05 Fuser Unit The fuser unit temperature is maintained at approximately 180 degrees Celsius by a thermistor, a comparator, an LSI, and the CPU. A thermal fuse, located within the fuser unit, prevents abnormal temperature rises should the temperature control circuits fail.
NOTE: The CPU checks for an open circuit in the thermistor at POWER-ON, setting a fuser alarm if this error is detected. The CPU also sets a fuser alarm if the proper temperature is not attained within a specified period of time after power-on. Upon detecting a fuser alarm, the CPU will halt (after printing the current page).
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.06 Main Motor (Drum Motor) The main motor is driven by the motor drivers IC5 and IC8 (M54646). The main motor is a two-phase dc motor, driven by the DM-PH0,1 signals supplied by the LSI. T1 and T2 provide the internal switching frequency needed for proper phasing. Main Motor - Diagram
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.07 LED Array Data on the 2,560 LEDs is loaded into the shift register by the head clock signal (HD CLK). The data is loaded into the latch circuit by the load head signal (HD LD). The on/off states of the LEDs are controlled by the signals (STB1-STB4). The logic gates in the latch circuits determine the on\off time of the LEDs. The on/off time is a function of the HD CLK, HD LD, HD DATA signals. LED Array - Diagram
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.08 Resist Motor The resist motor is a four-phase dc motor. It is driven clockwise (hopping), then counterclockwise (paper feed) by transistors TR-21,22,23,24. Resist Motor - Diagram
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Service Guide OL830Plus/OL850
Chapter 2 Principles of Operation
2.3.09 DC Fan The +38vdc fan is controlled by the FAN ON-P signal from the LSI.
NOTE: The fuser and the fan are not enabled when the cover is open. If the fan fails to run, the fuser will turn off and FAN ALARM is displayed on the operator panel. Printing will be disabled. In accordance with the TIME TO QUIET setting of the Level 2 Menu, the fuser will maintain the proper fusing temperature for 1 or 8 minutes after the last page has been printed. If printing is not requested within the selected time frame, the fuser will turn OFF and the fan speed will be reduced 50%. Selecting DISABLE allows the fuser to maintain the proper fusing temperature continuously.
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Chapter 2 Principles of Operation
2.3.10 Operation Panel The following components make up the operation panel: · 4-bit MPU · LCD control driver · LCD display (16 characters x two lines) · Operation panel sheet · LEDs · Operation buttons The operation panel is connected to the main controller board via the engine connection board and engine controller board. The operation panel is controlled by the main controller board by the operation panel interface (I/F) signal. The LCD control driver converts 4-bit character codes received from the main controller boards CPU into 8-bit character codes. Then the control driver retrieves the character pattern data (font) associated with the 8-bit character codes from the internal character generator (located on the operation panel board) for display on the LCD. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 2 Principles of Operation
2.3.11 Second Paper Tray Mechanism The optional second paper tray mechanism is controlled by the second tray driver board (LLFC). This board is attached to the left side of the second paper tray mechanism. The resist motor and paper tray detection sensors are mounted on this board. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 2 Principles of Operation
2.4 MECHANICAL OPERATION DESCRIPTION 2.4.01 Basic Principles - Electrostatic Printing A - 700 vdc charge is placed on the photoconductive drum by supplying -6Kvdc from the power supply to the charge wire. The printer turns on the LED array in conformance with the data received from the CUs main controller board. Once the charged drum is exposed to this light, an electrostatic image is formed on the drum surface. This latent image is developed with toner. The toner image is then transferred and fused to the paper. The electrostatic technology used in this printer is similar to that used in copying machines. The technology comprises the following processes.
Charging The surface of the photoconductive drum is uniformly charged. Exposure The charged photoconductive drum is exposed to light, forming an electrostatic image associated with the print image on the drum. Developing Negatively charged toner is attracted to the latent image, making the image visible. Transfer The toner is attracted to positive charged paper. Fusing The toner image is fused to the paper using heat and pressure. Cleaning Residual toner is removed from the image drum surface. Toner Recycling Unused toner collected during cleaning is returned to the developer unit
Electrostatic Process - Diagram
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Chapter 2 Principles of Operation
2.4.02 OL830-Plus/850 Printing Process Here is an illustration of the OL830-Plus/850s printing process. The white arrow marks designate the direction of rotation of the image drum; the black arrow marks designate the path of paper feeding. Printing Process - Diagram
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Chapter 2 Principles of Operation
2.4.03 Process Descriptions Hopping and Feeding Hopping and feeding are accomplished by the resist motor, hopping roller, and resist rollers. Turning the resist motor in the clockwise direction drives the hopping roller. Turning the resist motor in the counter-clockwise direction drives the resist rollers. · Hopping - loading paper from the tray The resist motor turns the hopping roller to advance the paper until the inlet sensor is enabled. After the paper has enabled the inlet sensor, the hopping roller continues to advance the paper a predetermined distance. The paper contacts the resist roller, which, along with the free-spinning upper metal pressure roller, removes paper skew. · Feeding - transporting paper through the printer At the end of the hopping process, the resist motor reverses direction and the resist rollers transport the paper through the printer. Hopping and Feed - Diagram
Charging -6 Kvdc is applied to the charge wire. This causes negative ions to be generated in the vicinity of the charge wire (corona discharge). The negative ions are discharged to the grid plate and the image drum surface. Since the drum surface is not conductive (in the dark), the negative charge (approximately -700 vdc) remains on the drum. To ensure that the drum surface is not charged with more than -700 vdc, a varistor is connected between the grid and ground. If the grid voltage exceeds -700 vdc, the varistor shunts this excess voltage to ground. Exposure Light emitted from the LED array strikes the image drum surface which is charged with negative ions. The areas of the drum struck by light become conductive. This causes the surface potential in these areas to drop (from -700 vdc to approximately -100 vdc). This forms a latent image on the image drum. Developing
The toner supply roller is constructed of a porous material which absorbs toner. The toner supply roller contains a -550 vdc bias charge and the development roller contains a -400 vdc bias charge. Since the development roller charge is more positive than the toner supply roller charge, toner is transferred from the toner supply roller to the development roller. The toner on the development roller is leveled by the doctor blade. This forms a thin coat of toner on the development roller surface. Since the areas of the drum exposed to light are charged more positively (-100 vdc) than the toner (-400 vdc), toner is attracted to the exposed areas, making the latent image visible. Transfer As paper passes under the image drum surface, a positive charge (+5 Kvdc), is applied to the transfer charge wire. This causes the paper to acquire a positive charge through corona discharge. Since the papers charge (+5 Kvdc) is more positive than the toner charge (-100 vdc), the toner is transferred to the paper. Cleaning Upon completion of transfer, residual toner on the image drum is scraped off by the cleaning blade and collected in the toner recovery unit. Fusing The toner image is fused on the paper by placing it between the heat roller and the back-up (pressure) roller. The heat roller is teflon coated and contains a 400 watt quartz lamp. A thermistor regulates the temperature of the heat roller within a predetermined range (about 150 degree C). A thermostat removes the supply voltage to the heat roller in the event of an abnormal temperature rise. The back-up (pressure) roller springs produce a pressure of 6.5 pounds on the paper. Paper Ejection Paper is transported from the fuser unit by the back-up roller. If the face-up stacker is closed, paper is routed to the top of the printer for face-down delivery. Toner Recycling Toner in the toner recovery tank is moved to the toner cartridge for reuse. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 2 Principles of Operation
2.5 SENSORS AND SWITCHES 2.5.01 Sensors and Switches · Inlet Sensor (Photosensor) · Outlet Sensor (Photosensor) · Paper Tray Identification Switches · Paper End Sensor (Photosensor) · Cover Open Switch Sensors and Switches - Diagram
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Chapter 2 Principles of Operation
2.5.02 Sensor Functions Power-On The inlet and outlet sensors are checked for their on and off states at power on time. · Inlet sensor on: PAPER FEED JAM ERROR (Paper supply jam) · Outlet sensor on: PAPER JAM ERROR (Paper exit jam) The thermistor sensor circuit detects if the temperature of the fusing unit reaches the normal temperature within the specified time. If it does not reach the normal temperature within the specified time, the thermistor sensor turns OFF the heater and generates an alarm. Hopping Whenever the inlet sensor fails to detect paper within a predetermined period of time after a feed command has been issued to the paper supply system (tray), the failure is counted. A hopping operation is then attempted up to three times, and if the paper still fails to feed properly, a paper feed jam error is established. Feeding If the leading part of the paper does not reach the outlet sensor within a predetermined period of time after the start of feeding by the resist motor, a paper jam error occurs. Form Length Error Detection Form length detection is not enabled for manually inserted paper or envelopes. Any form length other than those specified in Section One of the Service Handbook, will generate a form length error, which is displayed on the operator panel. To detect the form length, the processor measures the time interval between when the inlet sensor turns on until it turns off (after the start of the resist motor in the forward direction). Outlet Jam Detection Since paper is fed through the printer at a fixed speed, the outlet sensor must remain on for a predetermined amount of time. If the outlet sensor remains on in excess of this time, the controller assumes that an exit jam has occurred and an alarm is generated. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 3 Maintenance & Disassembly
3.1 MAINTENANCE 3.1.01 General Information This section lists the parts replacement, adjustment, cleaning, and lubrication procedures. Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly on a malfunctioning unit until you have followed the failure analysis procedures in Section Four of this Service Handbook. Follow the procedures listed in Adjustments and Service Settings. Adjustments may be required when either consumables or parts are replaced. Failure to perform these procedures could result in unnecessary service calls. Cleaning procedures must be performed correctly if high print quality is to be achieved. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 3 Maintenance & Disassembly
3.1.02 Maintenance Tools The following tools are required to service the unit. · #2 Phillips Screwdriver (with magnetic tip) · Straight-slot Screwdriver · Needle Nose Pliers (4 Inch) · Digital Multimeter · Shop Vacuum (with toner filter) · Cloth (soft and lint-free) · Cotton Swabs · All-purpose Cleaner · Silicon Oil Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 3 Maintenance & Disassembly
3.1.03 Maintenance Precautions · Do NOT disassemble the unit if it is operating normally. · Before starting disassembly and assembly, always power OFF the unit and detach the power cord. · Detach the interface cable, if installed. · Do not remove parts unnecessarily. Try to keep disassembly to a minimum. · Use the recommended maintenance tools. · When disassembling, follow the listed sequence. Failure to follow the correct sequence may result in damaged parts. · Screws, collars and other small parts are easily lost. Temporarily attach these parts to their original positions. · When handling circuit boards use extreme care. Integrated circuits (microprocessors, ROM, and RAM) can be destroyed by static electricity. · Do not place printed circuit boards directly on conductive surfaces. · Follow the recommended procedures when replacing assemblies and units. · After replacing the drum cartridge, clear the drum counter by following the Drum Counter Reset Procedure in Section 3.3 of this Service Handbook. · After replacing the fusing unit, clear the fusing unit counter by following the Fuser Counter Reset Procedure in Section 3.3 of this Service Handbook. · After replacing the LED head, check to see if the LED Head Drive Time rating needs to be set. Use the Setting the LED Head Drive Time Procedure in Section 3.3 of this Service Handbook. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 3 Maintenance & Disassembly
3.2 DISASSEMBLY/ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures. Only the removal procedures are explained. Reverse the procedure for the installation. At the bottom of each procedure is a listing of the parts covered in that procedure. The Okidata part number, item description, applicable product, comment (RSPL, Option, Consumable), and the cross-reference(s) to Appendix B are provided for each part. Items included in the Recommended Spare Parts List are indicated by the acronym RSPL. N/A appears where a part number is not available. This Service Handbook lists the disassembly procedures for major components of the unit. Okidata does NOT recommend disassembling a unit which is operating normally. If you decide to perform disassembly during this training, Okidata recommends that you perform only the disassembly procedures for RSPL items. All other procedures are provided to assist you in identifying parts. It is not likely that you will perform these procedures while servicing the product. Read all notes, cautions, and warnings. They contain important information regarding assembly/disassembly. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Chapter 3 Maintenance & Disassembly
3.2.01 Preliminary Items · Turn the power switch (1) OFF. · Detach the AC power cord (2) from printer. · Detach the interface cable (3). · Remove the font card (4), if installed. · Remove the paper tray (5). · Press the OPEN switch (6) and raise the stacker cover (7). · Push the lock levers (8) toward the rear of the printer and open the LED holder (9). · Lift and remove the image drum cartridge (10). To protect the image drum cartridge, place it back in the styrofoam shipping package.
NOTES: The image drum counter should be reset when a new image drum is installed. Refer to Section 3.3 of this Service Handbook for details See Appendix B for paper tray and font card part numbers. The image drum and the toner cartridge are available in the consumables kits listed below. P/N 56106601 Image Drum Kit Consumable Both B.2.13 Includes an Image Drum and Ozone Filter
P/N 52104201 Toner Cartridge Kit Consumable Both B.2.13 Includes a Toner Cartridge, a Fuser Cleaner Pad, and an LED Lens Cleaner Pad Refer to B.2.14 Paper Trays Option Both B.2.14 P/N 56609701 Cord: AC (120V) RSPL Both B.2.01 Refer to B.2.14 Font Cards Option Both B.2.14
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Chapter 3 Maintenance & Disassembly
3.2.02 Upper Cover · Perform this procedure: 3.2.01 · Grasp the operator panel assembly (1) at its bottom and detach it. · Pull on the locking collar and then detach the connecting cable (2) from connector J1 (3) of the operator panel board (4).
NOTE: When assembling the operator panel PCB, you must install the connecting cable with the blue strip to the left.
· Press the OPEN switch (5) and raise the stacker cover (6). · Remove the access cover (7). · Remove the two screws (8) and lift the front side of the upper cover (9). · Pivot the upper cover towards the rear and remove the upper cover. · Remove the stacker cover and two reset springs (10). · Remove the face-up stacker assembly (11). · The lower unit (12) contains the boards, shields, paper feed mechanism, transfer charger assembly and rollers. Installation · Open the stacker cover. · Align the square slots of the upper cover with the claws of the lower cover. The claws are located on the back of the lower cover, at the left and right sides. · Lower the upper cover into position. CAUTION: If the cover is not installed properly, paper jams will result. P/N 50066601 Stacker: Face-up Assembly RSPL Both B.2.01 P/N 50213509 Panel: Operator Assembly RSPL Both B.2.01 P/N 50213602 Unit: Lower RSPL Both B.2.01 P/N 53338206 Cover: Upper Assembly RSPL 830+ B.2.01 (w/830+ Logo)
P/N 53338208 Cover: Upper Assembly RSPL 850 B.2.01
(w/850 Logo)
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Chapter 3 Maintenance & Disassembly
3.2.03 Stacker Open Switch Assembly · Perform these procedures: 3.2.01 , 3.2.02
· Turn the upper cover over and detach the spring (1). · Work the pins of the shaft (2) from the arms of the upper cover and remove the shaft. · Release the two claws and remove the metal plate and cover open switch (3).
NOTE: The claws and metal plate are not shown.
P/N 50917901 Spring Both B.2.01 P/N 51111301 Shaft Both B.2.01 P/N 53527401 Button Both B.2.01
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Chapter 3 Maintenance & Disassembly
3.2.04 LED Head · Perform this procedure: 3.2.01 · Push the two blue lock levers (1) toward the rear of the printer and open the LED holder (2). · Squeeze the LED head (3) and the LED holder together. This eases the tension on the springs (4). · Use a screwdriver to remove the two clamps (5) on either side of the LED head. · Remove the LED head. · Remove the springs.
NOTES: Avoid touching the LED array when squeezing the LED head. Always clean the LED array with the LED lens cleaner provided in the toner cartridge kit. LED Head Replacement When you replace one LED head with another, the LED head drive time may need to be reset. Refer to Section 3.3 of this Service Handbook for further information
P/N 50914101 Spring: Bias (LED Head) RSPL Both B.2.05 P/N 50914301 Spring: Clamp (LED) RSPL Both B.2.05 P/N 55622301 Unit: LED Head (300 DPI OST) RSPL Both B.2.05 P/N 52104201 Toner Cartridge Kit Consumable Both B.2.13 Includes a Toner Cartridge, a Fuser Cleaner Pad, and an LED Lens Cleaner Pad
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Chapter 3 Maintenance & Disassembly
3.2.05 RS232 Interface Board (APSR)
NOTE: The RS232 Interface Board (APSR) is standard in the OL850. It is an option for the OL830-Plus.
· Perform these procedures: 3.2.01 · Remove the two mounting screws (1). · Unlock the interface board (2) from shield plate B (3). · Disconnect the connector (4). · Lift and remove the interface board. P/N 55058001 PCB: APSR Serial I/F Option- 830+ Both B.2.08 RS-232C / AppleTalk RSPL - 850 B.2.14 P/N 70018701 Expansion Kit Option 830+ B.2.14 Serial Interface/AppleTalk , 3.2.02
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Chapter 3 Maintenance & Disassembly
3.2.06 RAM Expansion Circuit Board (REXM) Option
NOTE: Refer to Section Four of this Service Handbook and the Users Documentation for changing menu settings when the memory expansion board is installed.
· Perform this procedure: 3.2.01 · Press the OPEN switch and raise the stacker cover. · Remove the access cover. · Disengage the connectors (1). · Remove the memory board (2). P/N 55051601 PCB: REXM 2 MB RSPL Option Both B.2.08 B.2.14 P/N 70016501 Memory Expansion Kit Option Both B.2.14 RAM 2MB Memory Board (REXM)
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Chapter 3 Maintenance & Disassembly
3.2.07 Emulation Board (APSH) · Perform this procedure: 3.2.01 · Press the OPEN switch and raise the stacker cover. · Remove the access cover. · Unlock the two circuit board supports (1). · Disengage the connector (2). · Remove the emulation board (3). P/N 55058101 PCB: APSH Emulation RSPL Both B.2.08 w/o ROM
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Chapter 3 Maintenance & Disassembly
3.2.08 Main Controller Board (APSM) · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07 · Raise the upper unit. · Remove the seven screws (1). · Remove shield B (2). · Remove the four screws (3). · Disconnect the connector (4). · Remove the main controller circuit board (5). P/N 51008201 Plate: Shield B (OST) RSPL Both B.2.08 P/N 55057902 PCB: APSM-4 Spare RSPL Both B.2.08 P/N 55934001 IC: CU EEPROM RSPL Both B.2.08 w/o ROM Main Controller
X24CO4P-NW
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Chapter 3 Maintenance & Disassembly
3.2.09 Engine Controller Board (LLAT) · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08 (sections of this chapter) · Disconnect the cables from the connectors J1 - DC fan (1), J2 - fuser thermistor (2), and J5 - paper supply unit (3). · Open the LED holder to allow access to the engine board mounting screw (4) and remove the mounting screw. · Close the LED holder and raise the upper unit. · Remove the three remaining mounting screws (5). · Lift the engine controller board (6) to disconnect it from the interconnect board (7). CAUTION:
Be careful not to lose the nylon spacer (8) located between the shield frame and the engine controller board. When installing the engine controller board, be sure that the spacer is in place or the engine controller board will short against the shield frame.
· On the engine controller board, press the pawls (9) to unlock and remove the print board cover (10). Board Replacement · Remove EEPROM (IC2) (11). The program ROM is masked to the CPU. · Install the EEPROM on the new board. Board Installation · Route the thermistor cable to J2 so it does not obstruct the outlet sensor. · Connect the paper supply unit cable to the engine controller circuit board via the groove in the shield plate. P/N 50516201 Spacer: Board RSPL Both B.2.08 P/N 53528401 Board Cover Both B.2.08 P/N 55067502 PCB: LLAT-8 Eng Cont RSPL Both B.2.08 P/N 55938201 IC: ENG EEPROM RSPL Both B.2.08 (OST) OL830+ /850
BR93LC46A
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3.2.10 Pulse Motor (Main) · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09 · Remove the three mounting screws (1). · Remove shield plate A (2), which has shield plate C (3) attached. · Remove the screw (4). · Remove the shield plate C. · Remove the interconnect board (5). (Only the location of the board is shown) · Remove the two high voltage wires from the motor cover. (Not shown) · Working from the bottom of the printer, remove the motor cover (6) by releasing the two black claws (7). · Remove the motor cover. · Shift the main motor assembly (8) to the left and detach it from the posts of the lower unit . · Remove the main motor assembly. · Remove the two screws (9). · Remove the main motor from the motor bracket (10). P/N 51008101 Plate: Shield A Assembly (OST) RSPL Both B.2.08 P/N 51008301 Plate: Shield C (OST) RSPL Both B.2.08 P/N 53329301 Motor Cover Both B.2.07 P/N 53329301 Motor Bracket Both B.2.07 P/N 55046002 PCB: LLID RSPL Both B.2.08 (PR - POW Connection)
P/N 56507701 Motor: Pulse (Main) RSPL Both B.2.07
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3.2.11 Idle Gear A, Idle Gear B, and Speed Reduction Gear · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09, 3.2.10 (sections in this chapter) · Remove the idle gear B (1). This is the white gear with large teeth. · Remove the deceleration gear (2). This is the black double gear. · Remove idle gear A (3). This is the white gear with small teeth. P/N 51218501 Gear: Idle "B" RSPL Both B.2.07 P/N 51218701 Gear: Speed Reduction RSPL Both B.2.07 P/N 51225701 Gear: Idle "A" RSPL Both B.2.07
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3.2.12 DC Fan Assembly · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09 (sections in this chapter) · Disconnect the cable (1). · Remove the DC fan assembly (2). P/N 56508501 Fan: DC (Assembly) RSPL Both B.2.06
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Service Guide OL830Plus/OL850
Chapter 3 Maintenance & Disassembly
3.2.13 Power Supply Unit · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09, 3.2.10, 3.2.12 (sections in this chapter). · Disconnect the two high-voltage cables (1).
NOTE: When installing, the cables are keyed for correct placement. The larger connector is to the front of the printer.
· Remove the screw (2) and detach the ground cable (3). [Only for 220/240 volt] · Remove the three screws (4). · Raise the upper unit . · Use needle nose pliers to remove the left torsion spring (5). · Lift the power supply unit (6) until it comes off the front guide (7) of the lower unit (8). · Slide the power supply unit towards the front to detach it from the rear claws (9) for removal. · Remove the AC cover (10) and AC contact plate (11). These items are located in the base frame. You must remove the power supply unit to access these items. However, you do not have to remove these items to remove the power supply unit. CAUTION
Installation If the power supply is not seated under the rear claws, the unit will not initialize.
P/N 50918101 Torsion Spring (Left) Both B.2.03 P/N 53057901 AC Contact Plate Both B.2.08 P/N 53502301 AC Cover Both B.2.08 P/N 56408708 Power Supply (220/240V) RSPL Option Both B.2.08 B.2.14 P/N 56408710 Power Supply (120V) RSPL Both B.2.08
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 3 Maintenance & Disassembly
3.2.14 Cover Open Microswitch Assembly · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09 (sections in this chapter). · Remove the screw (1). · Detach the connector (2). · Remove the microswitch assembly (3). P/N 55050721 Microswitch Assembly Both B.2.08 (AC 120 V)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 55
Service Guide OL830Plus/OL850
Chapter 3 Maintenance & Disassembly
3.2.15 Paper Eject Roller Assembly · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09, 3.2.10, 3.2.12 (sections in this chapter). · Place the face-up stacker assembly, located at the rear of the printer, down. · Press the lock lever and raise the upper unit. · Remove the mounting screw (1). · Remove the ground cable at the power supply (Not shown - 220/240 volt only). · Slightly lift the paper eject roller assembly (2) at its left end and slide the left end backward using the right end as a pivot. · Remove the paper eject roller assembly. · Separate the left (3) and right (4) springs and remove the bias rollers (5). P/N N/A Paper Eject Roller Assembly Both B.2.09 P/N 50918401 Bias Spring (Left) Both B.2.06 P/N 50918501 Bias Spring (Right) Both B.2.06 P/N 53334601 Bias Roller Both B.2.06
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Service Guide OL830Plus/OL850
Chapter 3 Maintenance & Disassembly
3.2.16 Paper Eject Sensor Lever and Rollers · Perform these procedures: 3.2.01, 3.2.02, 3.2.05, 3.2.06, 3.2.07, 3.2.08, 3.2.09, 3.2.10, 3.2.12, 3.2.15 (sections in this chapter). · Turn the paper eject roller assembly over and remove the paper eject sensor lever (1). · Remove the E-ring (2) and remove the paper eject idle gear (3) from the sheet guide (4). · Remove the face-up paper eject roller shaft (5) with paper eject rollers (6). · Remove the paper eject roller shaft (7) with face-up paper eject rollers (8). · Detach the sheet separator (9).
NOTE: The face-up paper eject roller shaft and the paper eject roller shaft are the same roller and have the same part number.
P/N N/A Sheet Separator Both B.2.09 P/N 50705301 E-Ring Both B.2.09 P/N 51005201 Sheet Guide Both B.2.09 P/N 51111401 Paper Eject Roller Shaft Both B.2.09 P/N 51222801 Idle Gear (Paper Eject) Both B.2.09 P/N 53334401 Paper Eject Roller Both B.2.09 P/N 53334501 Paper Eject Roller (Face-up) Both B.2.09 P/N 53528101 Sensor Lever (Paper Eject) Both B.2.09
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