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LED Page Printer Service Manual
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Service Guide OL810
Chapter 0 About This Manual
OL810
LED Page Printer
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 OL810
0 About This Manual Front Cover Manual Copyright 1 Specifications 1.1 Overview - General Information 1.2 Physical Specifications 1.3 Power Requirements 1.4 Environmental Conditions 1.5 Agency Approvals 1.6 Operational Specifications - Compatibility ....1.6.02 Emulations ....1.6.03 Fonts ....1.6.04 Front Panel Switches ....1.6.05 Interface Methods ....1.6.06 Menu Mode ....1.6.07 Paper Delivery Method ....1.6.08 Paper Feed Method ....1.6.09 Paper Loading ....1.6.10 Paper Out Detection ....1.6.11 Paper Trays ....1.6.12 Print Methods ....1.6.13 Print Resolution ....1.6.14 Print Speed ....1.6.15 Symbol Sets 1.7 Paper Specifications 1.8 Memory Specifications 1.9 Consumables 1.10 Options 1.11 Reliability 2 Principles of Operation 2.1 Principles of Operation - General Information ....2.1.02 Control Unit (CU) ........Block Diagram: Control Unit ........Main Control Board (OLMA) ........Reception Control ........Command Analysis Processing ........Font Processing ........Raster Buffer Read Operation ........Engine Interface (I/F) ........Memory Boards OLRA and OLRA-2 (Options) ........Font Card (Option) ....2.1.03 Printer Unit (PU) 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 39
Table of Contents ........Block Diagram: Printer Unit ........Engine Board Controller (LLAT) ........EEPROM Operation ........Power Supply Unit ........High Voltage / Bias Voltage Circuits ........Fuser Unit ........Main Motor (Drum Motor) ........LED Array ........Registration Motor ........DC Fan ........Operation Panel ........Second Paper Tray Mechanism ....2.1.04 Sensors and Switches 2.2 Product Operation - Electrostatic Printing ....Diagram: Printing Process ....Processes 3 Maintenance 3.1 Maintenance - General Information ....3.1.02 Maintenance Items ....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 (OLSA, Option) ....3.2.06 Memory Boards (OLRA-2 or OLRA, Options) ....3.2.07 Main Controller Board (OLMA) and Second Font Card Board (OLCA) ....3.2.08 Engine Controller Board (LLAT) ....3.2.09 Main Motor ....3.2.10 Idle Gear A, Idle Gear B, and Speed Reduction Gear ....3.2.11 DC Fan Assembly ....3.2.12 Power Supply Unit ....3.2.13 Cover Open Microswitch Assembly ....3.2.14 Paper Eject Roller Assembly ....3.2.15 Paper Eject Sensor Lever and Rollers ....3.2.16 Upper Unit ....3.2.17 Cover Open Switch Actuator ....3.2.18 Paper Eject Sensor Levers B and C ....3.2.19 Fusing Unit ....3.2.20 Metal Pressure Roller Assembly ....3.2.21 Registration Sensor Lever and Toner Sensor Lever ....3.2.22 Lock Lever Assembly
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Table of Contents ....3.2.23 LED Head Holder ....3.2.24 LED Holder Ground Plate ....3.2.25 Pressure Roller Assembly ....3.2.26 Transfer Charger Assembly ....3.2.27 Registration Roller Assembly ....3.2.28 High Voltage Connector ....3.2.29 Idle Gear and Post ....3.2.30 Paper Supply Unit ....3.2.31 Registration Motor ....3.2.32 Engine Connector Board, LLCC ....3.2.33 Hopping Roller A ....3.2.34 Separator ....3.2.35 Base Frame ....3.2.36 Ozone Filter ....3.2.37 Second Paper Feed Unit (Option) ....3.2.38 Second Paper Feed Unit Boards and Connectors ....3.2.39 Second Paper Supply Unit (Option) ....3.2.40 Cassette Spring (Second Paper Supply Unit) ....3.2.41 Registration Motor (Second Paper Supply Unit) ....3.2.42 Second Paper Supply Unit Control Board, LLFC 3.3 Adjustments And Service Settings - General Information ....3.3.01 Drum Counter Reset ....3.3.02 Darkness Control ....3.3.03 Switch 1 Maintenance Mode ........Actual Page Count ........Modified Page Count ........Fuser Counter Reset ........Vertical Print Start Position Adjustment ........Chart of EEPROM Parameters and Print Start Positions ........Setting the LED Head Drive Time ....3.3.04 Smoothing Select ....3.3.05 DC Voltage Check (+5 vdc) ....3.3.06 Menu Operation - General Information ........Menu Mode ........Printing the Menu ........Sample ........Reset Menu to Factory Defaults ........Menu Settings - Primary Menu - HP LaserJet III Emulation ........Menu Settings - Primary Menu - IBM ProPrinter III XL Emulation ........Menu Settings - Secondary Menu - Both Emulations ....3.3.07 Key Combinations ....3.3.08 Resets 3.4 Cleaning
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Table of Contents ....3.4.02 Static Charger ....3.4.03 Transfer Charger 3.5 Lubrication 3.6 Shipping Instructions 4 Failure Analysis 4.1 Overview - Introduction ....4.1.02 Printer Serial Number Identification ....4.1.03 Firmware Revision Identification 4.2 Reporting Problems 4.3 Troubleshooting Updates 4.4 Troubleshooting Tips 4.5 Abnormal Output 4.6 Fault Alarms - Using The Error Message Charts ....4.6.02 Error Messages: Operator Lamp Flashes (Chart A) ....4.6.03 Error Messages: Operator Lamp Does Not Flash (Chart B) 4.7 Repair Analysis Procedures (RAPS) - Using The RAPS ....4.7.02 RAP Index ........RAP 01: Printer Does Not Initialize ........RAP 02: Paper Feed Jam ........RAP 03: Paper Jam ........RAP 04: Paper Size Error ........RAP 05: Fusing Problem ........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 ........RAP 23: Printing Incorrect Characters 4.8 Printer Tests - General Information ....4.8.01 Continuous Print (Rolling ASCII) Test ....4.8.02 Font Sample Test
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Table of Contents ....4.8.03 Hexadecimal Dump Mode ....4.8.04 Serial Interface Loopback Test ....4.8.05 Engine Test A ....4.8.06 Engine Test B ....4.8.07 Menu Print ....4.8.08 Demo Page Print A Board Diagrams A.1 Overview - General Informationboard Diagrams A.2 Index To Charts ....A.2.01 Main Controller Board (OLMA) ....A.2.02 Engine Controller Board (LLAT) ....A.2.03 Operator Panel Board (LLJB-2) ....A.2.04 Engine Connection Board (LLCC) ....A.2.05 Second Font Card Board (OLCA) ....A.2.06 Power Connection Board (LLID) ....A.2.07 Power Supply Unit ....A.2.08 RS232-C Interface Board (OLSA) Option ....A.2.09 Memory Boards (OLRA and OLRA-2) Options ....A.2.10 Second Paper Feed Unit Controller (LLFC) Option ....A.2.11 Second Paper Feed Unit Connection Board (LLIG) Option ....A.2.12 Second Paper Feed Unit Connection Board (LLIF) Option B Illustrated Parts Listing B.1 Overview ....B.1.02 Definition of Terms ....B.1.03 Parts Ordering Information B.2 Charts ....B.2.01 Printer ....B.2.02 Printer Unit ....B.2.03 Paper Trays ....B.2.04 Upper Unit (1 of 2) ............Wrong diagram : Jim Fitzpatrick/Project Leader/Okidata; 11/12/96 ....B.2.05 Upper Unit (2 of 2) ....B.2.06 LED Holder ....B.2.07 Lower Unit (1 of 2) ....B.2.08 Lower Unit (2 of 2) ....B.2.09 Boards ....B.2.10 Paper Eject Roller Assembly ....B.2.11 Paper Supply Unit ....B.2.12 Options ....B.2.13 Font Cards ....B.2.14 Second Paper Feed Unit
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187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205
Table of Contents ....B.2.15 Packing Materials ....B.2.16 Consumables ....B.2.17 Documentation ....B.2.18 Service Training Kit Revisions
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Service Guide OL810
Chapter 0 About This Manual
This document may not be reproduced without the written permission of the Okidata 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 its control. Copyright 1994 by Okidata All rights reserved. First Edition May, 1992 P/N 58225901 Second Edition June, 1993 P/N 58225902 Third Edition November, 1994 P/N 58225903 Written and produced by the Okidata Technical Training Group Please address any comments on this publication to: Okidata Attn: Publications 532 Fellowship Road Mount Laurel, NJ 08054-3499
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. Bitstream is a registered trademark and Dutch, Fontware, and Swiss are trademarks of Bitstream, Inc. Fontware is licensed to Bitstream, Inc., in West Germany, France, and the United Kingdom by Electronic Printing Systems, Ltd. Centronics is a registered trademark of the Centronics Corporation Hewlett-Packard, HP, LaserJet, LaserJet+, LaserJet Series II, and LaserJet Series III are registered trademarks of Hewlett-Packard Company. IBM, PC, PC-DOS, and Proprinter XL are registered trademarks of International Business Machines Corporation. ITC Zapf Dingbats is a registered trademark of International Typeface 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 OL810
Chapter 1 Specifications
1.1 OVERVIEW 1.1.01 General Information The OL810 is a desktop page printer, using a stationary LED head and dry electrophotography as its exposure and development methods. The printer has a resolution of 300 x 300 dots per inch and a continuous print speed of 8 letter-sized sheets per minute. A one megabyte page memory is standard. It can be expanded (with two optional RAM printed circuit boards) for a total of five megabytes of printer memory. The OLRA memory board increases available RAM by 2 megabytes. The OLRA-2 memory board increases available RAM by 1 megabyte. Two optional memory boards can be installed at the same time. The printer features Oki Smoothing Technology (OST). The OST LED head provides edge smoothing to reduce the jagged stairstep effects of bitmapped images for improved print quality. The OST capability is selected through the SMOOTHING option of the printer menu. The default setting is SMOOTHING ON. Two emulations are available. The HP LaserJet III emulation has 42 fonts. The IBM Proprinter III XL emulation includes 26 fonts. Two optional font cards slots are available. Downloadable fonts are also accepted. A Centronics parallel interface is standard. An RS-232C serial interface is available as an option. Two consumables are used in the printer. The toner cartridge kit contains a toner cartridge, a fuser cleaner pad, and an LED lens cleaner. The other consumable, the image drum cartridge kit, includes an image drum cartridge and an ozone filter. A letter-size paper tray is included with the printer. Legal, envelope, executive, and A4 trays are also available. Paper feeding can be done automatically or manually. The printer 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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1.2 PHYSICAL SPECIFICATIONS 1.2.01 Dimensions Width: 17.72 inches (450 millimeters) Height: 6.02 inches (153 millimeters) Depth: 17.72 inches (450 millimeters) [Does not include paper tray] 1.2.02 Weight 24 pounds (approximately 11 kilograms) [Without options] 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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1.3 POWER REQUIREMENTS 1.3.01 Input Power 120 VAC +5.5%, -15% 220/240 VAC +/-10% 1.3.02 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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1.4 ENVIRONMENTAL CONDITIONS 1.4.01 Acoustic Rating Operation: 50 dB maximum QUIET Mode: 43 dB maximum 1.4.02 Altitude 10,000 feet (3,050 meters) 1.4.03 Ambient Temperature and Relative Humidity While operating: 50 to 90 degrees Fahrenheit (10 to 32 degrees Celsius) 20 to 80% Relative Humidity While in storage: - 4 to 110 degrees Fahrenheit ( - 20 to 43 degrees Celsius) 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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1.5 AGENCY APPROVALS 1.5.01 Listings FCC Class B UL478 Version 5 CSA 22.2 220 Radio Frequency Interference (RFI) Canadian Department of Communications Radio Interference Regulations 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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1.6 OPERATIONAL SPECIFICATIONS 1.6.01 Compatibility Standard HP LaserJet II HP LaserJet III / IIIP IBM ProPrinter IIIXL Option Diablo 630 Adobe PostScript with ATM 2.0 Auto Emulation Switching Software Adobe Type Manager Software
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 1 Specifications
1.6.02 Emulations Standard HP LaserJet II HP LaserJet III / IIIP IBM ProPrinter IIIXL Option Diablo 630 Adobe PostScript with Adobe Type Manager 2.0 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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1.6.03 Fonts - Resident HP III Emulation: 42 resident fonts IBM Proprinter III XL Emulation: 26 resident font styles 13 Scalable Resident Fonts CG Times, Univers, Univers Condensed, ITC Zapf Dingbats Available in various styles and weights. 42 Bitmap Resident Fonts All styles portrait and landscape Courier 10 point, Courier 12 Point, Dutch 8 point, Dutch 10 point, Dutch 10 point compressed, LN Printer, Swiss
Optional Bitmap Font Cards Roman Prestige Elite Letter Gothic OkiPro 65 MicroDocs TAX BarCodes Plus Scalable Font Cards WP Scalable Dazzling Presentations Special Documents
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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1.6.04 Front Panel Switches MENU 1 / Menu 2 ENTER / Quiet LAST - / Smoothing NEXT + / Demo RECOVER / Reset PRINT FONTS / Print Menu FORM FEED / Tray Select ON-LINE / Italicized Items To access, press switch for two seconds. 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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1.6.05 Interface Methods - Standard Centronics Parallel Interface Optional RS-232C Serial Interface Auto Interface Switching (with RS-232 Option) AppleTalk (with PostScript option) 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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1.6.06 Menu Mode Menu 1 Press ON-LINE to take the printer OFF-LINE. (READY will not be lit) Press MENU 1 Menu 2 Press ON-LINE to take the printer OFF-LINE. (READY will not be lit) Press MENU 1 / Menu 2 for more than two seconds Printing the Menu Press ON-LINE to take the printer OFF-LINE. (READY will not be lit) Press and hold PRINT FONTS / PRINT MENU until the message PRINT MENU is displayed in the message window. Each menu has several categories. To move between categories, press MENU 1. Each menu category has several possible settings. The current setting is indicated by an asterisk. To view the settings, press NEXT + to move to the next setting. Press LAST - to move to the previous setting. When the desired setting is displayed, press ENTER to select and store the setting. Press MENU 1 to bring up the next menu category. To save the menu changes / settings and exit menu mode, press RESET. For more information regarding the menu, refer to Section Three of this Service Handbook or the Printer 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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1.6.07 Paper Delivery Method Face down 200 sheets capacity Face up 100 sheet capacity 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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1.6.08 Paper Feed Method Automatic Feed Standard Tray (Top) Optional Second Tray (Bottom) Manual Feed
NOTE: Use Manual or Standard Tray (Top) for single sheet, envelopes, labels, 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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1.6.09 Paper Loading Automatic 200 sheet capacity, standard 200 sheet capacity, optional Manual One sheet at a time 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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1.6.10 Paper Out Detection Standard Tray (Top) The paper end lever in the paper supply unit contacts the paper. When paper is installed, the lever clears sensor S1 on the engine connection board. When paper is not installed, the lever blocks sensor S1 on the engine connection board. Optional Second Tray (Bottom) The paper end lever in the optional second paper feed unit contacts the paper. When the optional second paper feed unit is installed, the lever clears sensor S1 on the second paper feed unit controller. When the optional second paper feed unit is installed, the lever blocks sensor S1 on the second paper feed unit controller. 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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1.6.11 Paper Trays Letter Legal Executive A4 Envelope Universal 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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1.6.12 Print Methods Development Method Dry electrophotography Exposure Method Stationary LED Head (LED Array) Number of LED Elements: 2560 CAUTION: The OST LED Head for the OL810 is NOT interchangeable with non-OST 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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1.6.13 Print Resolution 300 x 300 dots/inch Oki Smoothing Technology Creates a series of "sub-scans" which allow the printer to automatically modulate the size and placement of the dots used to form characters and images. Through this combination of larger and smaller dots, the boundaries of letters and curves are filled in and smoothed out. This results in straighter edges, curves that really curve, sharper corners and crisper type. 1-6-08.pcx
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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1.6.14 Print Speed First print: 28 seconds maximum (letter size) Continuous print: 8 sheets per minute (letter size) Warm-up time: 45 seconds maximum temperature 77 degrees Fahrenheit (25 degrees Celsius) and rated voltage (120 VAC) 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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1.6.15 Symbol Sets Thirty-nine symbol sets are available through the OL810. 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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1.7 PAPER SPECIFICATIONS 1.7.01 Types CAUTION:
All items must be designed for xerographic (laser) printing. All items must be designed to withstand the heat of the fusing process (190 degrees Celsius and above). Envelopes, labels, and transparencies should only be fed from the top paper tray or manually. DO NOT use the optional second paper feed mechanism for envelopes, labels, or transparencies. Envelopes should not have flaps or seams that cross the print area. Use a wove or bond texture paper. Avoid cockle, linen, or laid paper. Okidata DOES NOT recommend using embossed paper. Okidata DOES NOT recommend using coated papers (unless they are specifically designed for laser printers). Avoid papers with high cotton or rag content. 100% wood pulp papers work the best. Pre-printed forms MUST BE printed with a heat resistant ink that can withstand the heat of the fusing process (190 degrees Celsius and above). Cutouts are pages with some portion removed. The printer will print on pages with cutouts less than 0.375" in diameter. The print must be more than 0.1" from the edge of the cutout. The printer will print to within 0.1" from the edge of a ring hole or perforation. Make sure that the holes and perforations are clean and free of burrs. Burred perforations may cause paper jams.
Letter Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 8.5 inches (216 millimeters) Length: 11 inches (279 millimeters) Paper Feed Path: Automatic Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Legal Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 )
Width: 8.5 inches (216 millimeters) Length: 14 inches (356 millimeters) Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Executive Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 7.25 inches (184 millimeters) Length: 10.5 inches (267 millimeters) Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) A4 Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 8.27 inches (210 millimeters) Length: 11.69 inches (297 millimeters) Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) A5 Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 5.83 inches (148 millimeters) Length: 8.27 inches (210 millimeters) Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) A6 Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 4.13 inches (105 millimeters) Length: 5.83 inches (148 millimeters)
Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) B6 Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 7.17 inches (182 millimeters) Length: 10.12 inches (257 millimeters) Paper Feed Path: Automatic (with optional paper tray) Manual Paper Delivery: Face up Face Down Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Envelope Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Size: Minimum: 3.5 x 7.5 inches (89 x 191 millimeters) Maximum: 7.2 x 10.1 inches (183 x 275 millimeters) Business 4.12 x 9.5 inches (105 x 241 millimeters) C5 6.4 x 9.12 inches (163 x 232 millimeters) DL 4.36 x 8.77 inches (111 x 223 millimeters) Monarch 3.87 x 7.5 inches ( 98 x 191 millimeters) Paper Feed Path: Automatic (with optional paper tray) top paper tray ONLY Manual Paper Delivery: Face up ONLY Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Face up deliver ONLY ONLY feed from the top paper tray OR manually
Labels Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 )
Recommended: 20 lbs. (75 g/m 2 ) Width: 8.5 inches (216 millimeters) Length: 14 inches (356 millimeters) Paper Feed Path: Automatic top paper tray ONLY Manual Paper Delivery: Face up ONLY Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Face up deliver ONLY ONLY feed from the top paper tray OR manually Transparencies Weight: Minimum: 16 lbs. (60 g/m 2 ) Maximum: 24 lbs. (90 g/m 2 ) Recommended: 20 lbs. (75 g/m 2 ) Width: 8.5 inches (216 millimeters) Length: 14 inches (356 millimeters) Paper Feed Path: Automatic (top paper tray ONLY) Manual Paper Delivery: Face up ONLY Notes: Must be designed for xerographic (laser) printing Must be designed to withstand the heat of the fusing process (190 degrees Celsius and above) Face up deliver ONLY ONLY feed from the top paper tray OR manually
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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1.8 MEMORY SPECIFICATIONS 1.8.01 EEPROM EEPROM stands for Electronically 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 1.8.02 ROM Main Controller Program ROM (2) 1 Mbyte 1 Mbyte Engine Controller ROM None installed; masked to the CPU 1.8.03 RAM Resident RAM = 1 Mbyte Expansion RAM (Options) Memory Board (OLRA-2) One Mbyte Memory Board (OLRA) Two Mbyte NOTES: Total installed RAM cannot exceed 5 Mbyte Two optional memory boards can be installed at the same time in the OL810. Standard Memory (1 Mbyte) Installed Installed Installed Installed Installed Installed 1.8.03 RAM Resident RAM = 1 Mbyte Expansion RAM (Options) Installed Installed Installed Installed Installed Installed Installed Installed Optional OLRA-2 (1 Mbyte) Optional OLRA-2 (1 Mbyte) Optional OLRA (2 Mbyte) Optional OLRA (2 Mbyte) Total Memory
1 Mbyte 2 Mbyte 3 Mbyte 3 Mbyte 4 Mbyte 5 Mbyte
Memory Board (OLRA-2) One Mbyte Memory Board (OLRA) Two Mbyte NOTES: Total installed RAM cannot exceed 5 Mbyte Two optional memory boards can be installed at the same time in the OL810. 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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1.9 CONSUMABLES 1.9.01 Image Drum Cartridge Kit Includes: Image Drum Cartridge Ozone Filter 1.9.02 Toner Cartridge Kit Includes: Toner Cartridge Fuser Cleaner Pad LED Lens Cleaning Pad 1.9.03 Toxicity No carcinogens are contained
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1.10 OPTIONS 1.10.01 Memory Boards (RAM Expansion) Memory Board (OLRA-2) One Mbyte Memory Board (OLRA) Two Mbyte
NOTES: The OL810 LED page printer contains 1 megabyte of RAM, standard. Two optional memory boards can be installed at the same time in the OL810.
Standard Memory (1 Mbyte) Installed Installed Installed Installed Installed Installed 1.10.02 Font ROM Card NOTE: Two cards can be installed at the same time Tax Prestige Elite Letter Gothic 1.10.03 Paper Trays Letter (200 sheet capacity) Legal (200 sheet capacity) Envelope (15 capacity) Executive (200 sheet capacity) A4 (200 sheet capacity) Universal (200 sheet capacity) 1.10.04 Serial Interface Board RS-232C Serial Provides serial communication capability at speeds up to 19.2 Kbits per second. Installed Installed Installed Installed Installed Installed Installed Installed Optional OLRA-2 (1 Mbyte) Optional OLRA-2 (1 Mbyte) Optional OLRA (2 Mbyte) Optional OLRA (2 Mbyte) Total Memory
1 Mbyte 2 Mbyte 3 Mbyte 3 Mbyte 4 Mbyte 5 Mbyte
1.10.05 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.
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1.11 RELIABILITY 1.11.01 Mean Page Between Failure (MPBF) Approximately 32,000 pages 1.11.02 Mean Time To Repair (MTTR) Approximately 20 minutes 1.11.03 Printer Life Approximately 300,000 pages 1.11.04 LED Printhead Life Built to exceed printer life 1.11.05 Fuser Life Approximately 180,000 pages 1.11.06 Printer Duty Cycle Approximately 12,000 pages per month @ 5% print density 1.11.07 Toner Life Approximately 2,500 pages at approximately 5% density 1.11.08 Image Drum Life Approximately 15,000 pages 1.11.09 Warranty One year, parts and labor (entire printer) Five years, LED printhead 1.11.10 Service Authorized Okidata Service Centers
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Chapter 2 Principles of Operation
2.1 PRODUCT OVERVIEW 2.1.01 General Information This section describes the operation of the printer. The information is divided into these four sections. Control Unit (CU) Printer Unit (PU) Mechanical Operation 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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2.1.02 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 following are the principal hardware components of the CU. Main Control Board Serial Interface Board (Option) Memory Boards (Options) Font Cards (Options)
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Block Diagram: Control Unit
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Main Control Board (OLMA) The main control board consists of a 25 Mhz oscillator, a Motorola 68000 Microprocessor (CPU), two 1 Mbyte Font ROMs, a 1 Mbyte Program ROM, 1 Mbyte of RAM, an EEPROM, and a Gate Array. The main control board is connected to the host system through a Centronics parallel interface or an optional RS-232C serial interface. The main control board is connected to the printer unit via CN7 on the main control board and J7 on the PUs engine controller board. The Gate Array is housed in a LSI. This component can read/write/ process data simultaneously in accordance with the 25Mhz clock pulse. Data is read from and written to the EEPROM via the gate array. The gate array also provides the dynamic RAM refresh. The gate array sends a 12.5 Mhz clock signal to the microprocessor. This clock pulse governs the processing and executing of commands by the CPU. The EEPROM, located on the main control board, stores the default interface protocol information. The gate array controls reading data from, and writing data to, the dynamic RAM. There are six major functions of the main control board. Reception Control Command Analysis Processing Font Processing Raster Buffer Read Operation Engine Interface (I/F) Processing Operation Panel Control 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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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. 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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Command Analysis Processing The printer has two emulation modes. IBM Proprinter III XL: IBM Laser Jet Series III: Hewlett Packard 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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Font Processing Bit mapped fonts and the scalable fonts are available for Hewlett Packard LaserJet Series III emulation. Only the bit mapped fonts are available for IBM Proprinter III XL. 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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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. 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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Engine Interface (I/F) The engine interface 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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Memory Boards OLRA and OLRA-2 (Options) The printer contains 1 megabyte of RAM, standard. Two optional memory boards are available. Installing these boards increases the amount of available RAM. The OLRA memory board increases available RAM by 2 megabytes. The OLRA-2 memory board increases available RAM by 1 megabyte. Two optional memory boards can be installed at the same time in the printer. The CPU detects the extended RAM board by sending the MEMEXIST signal. The RAMs capacity is identified during the power-on sequence. The end user can verify RAM capacity by printing the menu.
NOTES: Total installed RAM cannot exceed 5 Mbyte Two optional memory boards can be installed at the same time in the printer.
Standard Memory (1 Mbyte) Installed Installed Installed Installed Installed Installed Installed Installed Installed Installed Installed Installed Installed Installed Optional OLRA-2 (1 Mbyte) Optional OLRA-2 (1 Mbyte) Optional OLRA (2 Mbyte) Optional OLRA (2 Mbyte) Total Memory
1 Mbyte 2 Mbyte 3 Mbyte 3 Mbyte 4 Mbyte 5 Mbyte
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Font Card (Option) Two optional font cards (for additional bit mapped/scalable fonts) can be installed at the same time. 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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2.1.03 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 Registration 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
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Block Diagram: Printer Unit
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Engine Board Controller (LLAT) Contents The PUs engine controller board contains the following items. Eight Bit Microprocessor 128 Kbyte of internal RAM 32 I/O ports 5 interrupt lines One Kbyte EEPROM 120 Pin LSI 36 I/O ports Two Drivers IC5 IC8 Toner End Sensor Inlet Sensor Outlet Sensor Comparator IC7 Latch IC4 Four Driver Transistors T21-T24 Two Oscillators OSC1/OSC2. Operations The engine controller board enables the fuser lamp. It 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 control board. The LED array illuminates, leaving a latent image on the photosensitive drum. The engine controller board also controls paper feed, paper transfer, and electrostatic printing processes.
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EEPROM Operation The 128 Byte Electrically Erasable PROM (EEPROM) is loaded with the data listed below. 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. The drum counter can be set to zero after the drum is replaced by holding down the RESET button and turning the power switch ON. 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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Power Supply Unit The power supply unit generates the voltages listed below from the AC input voltage. Voltage + 5 vdc + 12 vdc - 12 vdc + 38 vdc + 5 Kvdc - 6 Kvdc - 700 vdc - 550, - 400 vdc Purpose Logic Levels Interface Line Voltage Interface Line Voltage Motor/Fan Drive Voltage: High Voltage Source Transfer Charge Voltage Drum Charge Voltage Charge Grid Bias Voltage Developer Bias Voltages
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High Voltage / Bias Voltage Circuits The high voltage circuit supplies the following voltages. · The drum charge voltage (about - 6 Kvdc) to the charge wire. · The transfer charge voltage (about + 5 Kvdc) to the transfer wire. These two charge voltages are generated by a high voltage power supply unit, which is attached to the power supply unit. The bias voltage circuit provides the grid voltage (about - 700 vdc) and developer bias voltages (about 550 vdc and - 400 vdc).
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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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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.
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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 LEDs on/off time is a function of the HD CLK, HD LD, HD DATA signals.
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Registration Motor The registration motor is a four-phase dc motor. It is driven clockwise (hopping), then counterclockwise (paper feed) by transistors TR-21,22,23,24.
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DC Fan The +38vdc fan is controlled by the FAN ON-P signal from the LSI. 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 ERROR PU FAN MOTOR (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. 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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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 control board via the engine connection board and engine controller board. The operation panel is controlled by the main control board by the operation panel interface (I/F) signal. The LCD control driver converts 4-bit character codes received from the main control boards CPU into 8-bit character codes. The control driver then 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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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 registration motor and paper tray detection sensors are mounted on this board.
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2.1.04 Sensors and Switches Inlet Sensor (Photosensor) Outlet Sensor (Photosensor) Paper Tray Identification Switches Paper End Sensor (Photosensor) Cover Open Switch
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 fuser 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 occurs. 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 registration 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 1 of the Service Handbook, will generate a form length error, causing an error message to be displayed on the operator panel. To detect the form length, the processor times the interval between the activation and deactivation of the inlet sensor. The inlet sensor is deactivated after the registration motor starts 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 time. If the outlet sensor remains on longer, 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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2.2 PRODUCT OPERATION 2.2.01 Electrostatic Printing Functional Description A - 700 vdc charge is placed on the photoconductive drum by supplying -6 Kvdc 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 control 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 embodied in copying machines. The technology uses the processes described in the following sections. Diagram: Electrostatic Printing
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Diagram: Printing Process Here is an illustration of the printing process. The white arrows show the rotation of the image drum. The black arrows show the paper feed path.
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Processes Hopping and Feeding Hopping and feeding are accomplished by the registration motor, hopping roller, and registration rollers. Turning the registration motor in the clockwise direction drives the hopping roller. Turning the registration motor in the counter-clockwise direction drives the registration rollers. Hopping Hopping loads paper from the tray The registration 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 registration roller. The registration roller, along with the free-spinning upper metal pressure roller, removes paper skew. Feeding At the end of the hopping process, the registration motor reverses direction and the registration rollers transport the paper through the printer.
Charging The surface of the photoconductive drum is uniformly charged. -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 The charged photoconductive drum is exposed to light, forming an electrostatic image associated with the print image on the drum. 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 Negatively charged toner is attracted to the latent image, making the image visible. 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 The toner is attracted to positive charged paper. 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 Residual toner is removed from the image drum surface. 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 to the paper using heat and pressure. The toner image is fused on the paper by placing it between the heat roller and the pressure (back-up) roller. The heat roller is teflon coated and contains a 400 watt quartz lamp. A thermistor regulates the heat roller temperature at a predetermined temperature (about 150° C). A thermostat removes the supply voltage to the heat roller in the event of an abnormal temperature rise. The pressure (back-up) roller springs produce a pressure of 6.5 pounds on the paper. Paper Ejection
Paper is transported from the fuser unit by the pressure (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 Unused toner collected during cleaning is returned to the developer unit. 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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3.1 MAINTENANCE 3.1.01 General Information This section lists the parts replacement procedures, printer adjustments, and procedures for cleaning and lubrication. Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly on a malfunctioning printer until you have followed the failure analysis procedures in Section Four of this Service Handbook. Follow the procedures listed in Adjustments and Service Settings. Counters may have to be reset and adjustments may be required when either consumables or parts are replaced. Failure to perform these procedures could result in unnecessary service calls. The printer is a xerographic device. 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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3.1.02 Maintenance Items The following tools are required to service the printer. #2 Phillips Screwdriver (with magnetic tip) Straight-slot Screwdriver Digital Multimeter Needle Nose Pliers (4 Inch) 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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3.1.03 Maintenance Precautions 1. Do not disassemble the printer if it is operating normally. 2. Before starting disassembly and assembly, always turn the AC power switch OFF and pull out the AC plug. 3. Detach the interface cable, if installed. 4. Do not remove parts unnecessarily: try to keep disassembly to a minimum. 5. Use the recommended maintenance tools. 6. When disassembling, follow the listed sequence. Failure to follow the correct sequence may result in damaged parts. 7. Since screws, collars and other small parts are easily lost, they should be temporarily attached to the original positions. 8. When handling circuit boards use extreme care. ICs such as microprocessors, ROM and RAM can be destroyed by static electricity. 9. Do not place printed circuit boards directly on conductive surfaces. 10. Follow the recommended procedures when replacing assemblies and units. 11. After replacing the drum cartridge, clear the drum counter by following the Drum Counter Reset Procedure in Section 3.3 of this Service Handbook. 12. 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. 13. 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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3.2 DISASSEMBLY/ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures. Only the removal procedures are explained here. Reverse the procedure for the installation. At the bottom of each procedure is a listing of Okidata part numbers, item descriptions, and cross-references to Appendix B. Items included in the Recommended Spare Parts List are marked RSPL. N/A will appear where a part number is not available. We have listed disassembly procedures for major components of the printer. If you decide to perform disassembly during this training, we recommend 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 a printer. This section has a flowchart of the disassembly procedures. An index for the flowchart is also provided. 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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3.2.01 Preliminary Items 1. Turn the power switch (1) OFF. 2. Detach the AC power cord (2) from printer. 3. Remove the paper tray (3). 4. Detach the interface cable (4). 5. Remove the font cards (5), if installed. 6. Press the OPEN switch (6) and raise the stacker cover (7). 7. Push the lock levers (8) toward the rear of the printer and open the LED holder (9). 8. 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. Refer to 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 56609701 Cord: AC (120 V) RSPL B.2.02 P/N 56624301 Cord: AC (220 V) Option B.2.02 and 12 P/N 56624501 Cord: AC 240 V (OL Series) UK Option B.2.02 and 12 P/N 56106601 Image Drum Cartridge Consumable B.2.04
Includes an Image Drum and Ozone Filter
P/N 52104201 Toner Cartridge Kit Consumable B.2.16
Includes a Toner Cartridge, a Fuser Cleaner Pad, and an LED Lens Cleaner Pad
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3.2.02 Upper Cover 1. Perform this procedure: 3.2.01. 2. Grasp the operator panel assembly (1) at its bottom and detach it. 3. Pull on the locking collar and then detach the connecting cable (2) from connector J1 (3) of the operator panel board (4). 4. Press the OPEN switch (5) and raise the stacker cover (6). 5. Remove the access cover (7). 6. Remove the two screws (8) and lift the front side of the upper cover (9). 7. Pivot the upper cover towards the rear and remove the upper cover. 8. Remove the stacker cover and two reset springs (10). 9. Remove the face-up stacker assembly (11). 10. The lower unit (12) contains the boards, shields, paper feed mechanism, transfer charger assembly and rollers. Installation 11. Open the stacker cover. 12. 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. 13. Lower the upper cover into position. CAUTION:
When assembling the operator panel board, you must install the connecting cable with the blue strip to the left. If the cover is not installed properly, paper jams will result.
P/N N/A Access Cover B.2.02 P/N 50066601 Stacker: Face-up Assembly RSPL B.2.02 P/N 50213508 Panel: Operator Assembly RSPL B.2.02
P/N 50213602 Unit: Lower RSPL B.2.02 P/N 50918001 Reset Spring B.2.02 P/N 53338203 Cover: Upper w/logo (OL810) RSPL B.2.02 P/N N/A Stacker Cover Assembly B.2.02 P/N 52046506 Logo: Plate OL810 RSPL B.2.02 P/N 52054004 Touch Sheet: Op Panel (OL810) RSPL B.2.02
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: 62
Service Guide OL810
Chapter 3 Maintenance
3.2.03 Stacker Open Switch Assembly 1. Perform these procedures: 3.2.01 and 3.2.02. 2. Turn the upper cover over and detach the spring (1). 3. Work the pins of the shaft (2) from the arms of the upper cover and remove the shaft. 4. 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 B.2.02 P/N 51111301 Shaft B.2.02 P/N 53527401 Button B.2.02
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: 63
Service Guide OL810
Chapter 3 Maintenance
3.2.04 LED Head 1. Perform this procedure: 3.2.0