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LED Page Printer Service Manual
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Service Guide OL840
Chapter 0 About This Manual
OL840
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
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Service Guide OL840
0 About This Manual Front Cover Copyright Manual Revision 1 Product Specifications 1.1 Overview 1.2 Product Specifications 1.3 Paper Specifications 1.4 Physical Specifications 1.5 Power Requirements 1.6 Environmental Conditions 1.7 Agency Approvals 2 Principles of Operation 2.1 Overview 2.2 Printer Overview ....2.2.02 Main Control Unit ....2.2.03 Main Controller Board (RPSS) ....2.2.04 Program ROM Board (RPSR) ....2.2.05 Connection Board (LNKZ) ....2.2.06 Expansion RAM Board (REXM) ....2.2.07 Font Card 2.3 Printer Control Unit ....2.3.02 Engine Driver Board (LLAB-2) ....2.3.03 Power Supply Unit ....2.3.04 Fuser Unit ....2.3.05 Main Motor (Drum Motor) ....2.3.06 LED Array ....2.3.07 Resist Motor ....2.3.08 DC Fan ....2.3.09 Operation Panel ....2.3.10 Second Paper Tray Mechanism (Option) ....2.3.11 Sensor Functions 3 Maintenance & Disassembly 3.1 Maintenance ....3.1.02 Maintenance Tools ....3.1.03 Maintenance Precautions 3.2 Disassembly/Assembly Procedures ....Sequence of Procedures ....3.2.01 Main Controller Board (RPSS) ....3.2.02 Program ROM Board (RPSR) ....3.2.03 Optional Expansion RAM Board (REXM) 3.3 Adjustments And Service Checks 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 3.4 Cleaning 3.5 Lubrication 3.6 Consumables 4 Failure & Repair Analysis 4.1 OL840 Troubleshooting ....4.1.02 LCD Display Messages (PostScript Mode) A Reference Charts A.1 Overview A.2 Charts ....A.2.01 Main Control Board (RPSS) ....A.2.02 Program ROM Board (RPSR) ....A.2.03 RAM Board (REXM) (Option) B Illustrated Parts Listing Ol800/Ol820/Ol840 Parts Compatibility List ....Interchangeable Parts (OL800, OL820 and OL840)
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Service Guide OL840
Chapter 0 About This Manual
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 its control. © 1994 by Okidata All rights reserved. First Edition, March 1992 Second Edition May, 1994 Written and produced by the Okidata Technical Training Group Please address any comments on this publication to: Technical Training Group Okidata 532 Fellowship Road Mount Laurel, NJ 08054-3499 Fax Number: (609) 235-2600, ext. 7034 Okilink Login Name: Technical Training OKIDATA is a registered trademark of Oki Electric Industry Company, Ltd.; Marque deposee de Oki Electric Industry Company, Ltd.; Marca Registrada, Oki Electric Industry Company, Ltd. BAR CODES PLUS, MICRO DOCS and OKIPRO 65 are trademarks of OKIDATA, Division of OKI America, Inc. Adobe, Adobe Illustrator, and PostScript are registered trademarks of Adobe Systems Incorporated. Apple, AppleTalk, LaserWriter, LaserWriter II, LocalTalk, and Macintosh, are registered trademarks of Apple Computer, Incorporated. 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. Diablo 630 is a registered trademark of Xerox Corporation. Helvetica, Optima, Palatino, Present and Times are registered trademarks of Linotype AG and/or its subsidiaries.
Hewlett-Packard, HP, LaserJet, and LaserJet Series II are registered trademarks of Hewlett-Packard Company. IBM, PC, PC-DOS, and Proprinter XL are registered trademarks of International Business Machines 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 OL840
Chapter 0 About This Manual
Note: The OL800/820 Service Training course is part of the OL-Series Training Course and can not be purchased separately. © 1994 by Okidata All rights reserved. First Edition, March 1992 Second Edition May, 1994 Written and produced by the Okidata Technical Training Group THE OL400/800/820/830/840 VIDEO TRAINING KIT covers the following products: o OL400 o OL800 o OL820 o OL830 o OL840 The following items are included in the kit: o OL400 Service Handbook o OL800/820 Service Handbook o OL830 Service Handbook o OL840 Service Handbook o Service Training Video o OL400/800/820 User's Documentation o OL830 User's Documentation o OL840 User's Documentation Price: $95.00 P/N 58226902 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) ($124.00 Canadian)
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Service Guide OL840
Chapter 1 Product Specifications
1.1
OVERVIEW
1.1.01 General Information The OL840 is an 8 page per minute page printer, with true Adobe Postscript capability. The OL840 uses a stationary LED head and dry electrophotography as its exposure and development methods. In addition to supporting Adobe Postscript (35 Fonts), the OL840 provides two additional emulations. The HP Laserjet Series II emulation has 36 resident fonts. The Diablo 630 emulation has 18 resident fonts. Two optional font cards can be installed with the Diablo and HP emulations. Six cards are available at this time. The OL840 also accepts HP compatible downloadable fonts. A 2MB page memory is standard on the OL840; this can be expanded to 4MB with an optional RAM printed circuit board. A Centronics parallel interface, an RS-232C serial interface and an AppleTalk interface are standard. 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. Toner and drum life depend on printer use. Based on a 5% print density and 10 pages per job, a toner cartridge should last approximately 2,500 pages; a drum should last approximately 15,000 pages. A 200 sheet letter-size paper tray is included with the printer, and a second tray can be added, providing an additional 200 pages. Legal, Envelope, Executive and A4 paper trays are also available. Paper feeding can be done automatically or manually. Pages can be printed face-down or face-up. A rear exit path is provided for items such as: card stock, envelopes, labels or overhead transparencies. An OL800 may be upgraded to an OL840 by removing the Program Cartridge and replacing the Main Controller Board with the Postscript Controller Board. The OL840 Printer is a member of the family of OL Series Printers which presently includes the OL400, OL800, OL820 and OL830. Okidata's own proprietary engine assures built-in quality and reliability.
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 Product Specifications
1.2
PRODUCT SPECIFICATIONS
1.2.01 Print Specifications Development method: Dry electrophotography Exposure method: Stationary LED head 1.2.02 Print Speed First print: 28 seconds maximum (letter size) Continuous print: 8 sheets/minute (letter size) Warm-up time: 40 seconds maximum [at room temperature 77oF (25oC) and rated voltage (120 VAC)] Postscript Initialization time: 120 seconds maximum [with 4 MB memory installed and "Do Start Page" deselected] 1.2.03 Symbol Sets HP Emulation: Thirty-nine symbol sets are available through the OL840. 1.2.04 Available Fonts Postscript: 35 Adobe Fonts HP Emulation: 36 resident fonts (HP A,B,C,F,L,Y,S1 and S2 Cartridge Fonts) Diablo 630 Emulation: 18 resident fonts 1.2.05 Paper Feed Method Automatic feed Manual Feed 1.2.06 Paper Delivery Method Face down/face up 1.2.07 Print Resolution 300 x 300 dots/inch 1.2.01 Print Specifications Development method: Dry electrophotography Exposure method: Stationary LED head 1.2.02 Print Speed
First print: 28 seconds maximum (letter size) Continuous print: 8 sheets/minute (letter size) Warm-up time: 40 seconds maximum [at room temperature 77oF (25oC) and rated voltage (120 VAC)] Postscript Initialization time: 120 seconds maximum [with 4 MB memory installed and "Do Start Page" deselected] 1.2.03 Symbol Sets HP Emulation: Thirty-nine symbol sets are available through the OL840. 1.2.04 Available Fonts Postscript: 35 Adobe Fonts HP Emulation: 36 resident fonts (HP A,B,C,F,L,Y,S1 and S2 Cartridge Fonts) Diablo 630 Emulation: 18 resident fonts 1.2.05 Paper Feed Method Automatic feed Manual Feed 1.2.06 Paper Delivery Method Face down/face up 1.2.07 Print Resolution 300 x 300 dots/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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Chapter 1 Product Specifications
1.3
PAPER SPECIFICATIONS
1.3.01 Paper Types Letter Size: 8.5" x 11" Feed: Automatic or Manual Weight: Minimum 16 lbs Maximum 24 lbs Recommended 20 lbs Legal Size: 8.5" x 14" Feed: Automatic (with optional paper tray) or Manual Weight: Minimum 16 lbs Maximum 24 lbs Recommended 20 lbs Executive Size:7.25" x 10.5" Feed: Automatic (with optional paper tray) or Manual Weight: Minimum 16 lbs Maximum 24 lbs Recommended 20 lbs A4 Size:8.27" x 11.69" Feed: Automatic (with optional paper tray) or Manual Weight: Minimum 16 lbs Maximum 24 lbs Recommended 20 lbs Envelopes Size:Minimum 3.5" x 7.5" Maximum 7.2" x 10.1" Feed: Automatic (with optional paper tray) or Manual Weight: Minimum 16 lbs Maximum 24 lbs Recommended 20 lbs 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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Chapter 1 Product Specifications
1.4
PHYSICAL SPECIFICATIONS
1.4.01 Outside Dimensions Width: 17.72" Height:9.49" Length: 17.72" 1.4.02 Printer Weight 37 lbs. 1.4.03 LED Array Number of LED Elements - 2560
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 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
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 Product Specifications
1.6
ENVIRONMENTAL CONDITIONS
1.6.01 Ambient Temperature and Relative Humidity Operation 50° to 89° F 10° to 32° C 20 to 80% Relative Humidity Storage 14° to 122° F 10° to 50° C 1.6.02 Printer Noise Level During operation: 50 dB maximum At standby: 43 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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Chapter 1 Product Specifications
1.7
AGENCY APPROVALS FCC Class B UL 478 Ver.5 CSA 22.2 220
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 OL840
Chapter 2 Principles of Operation
2.1 OVERVIEW 2.1.01 Outline of Printer Operation The primary control boards of the printer are the Engine Driver Board (LLAB-2) and the Main Controller Board (RPSS). The Engine Driver Board controls the printer mechanism and drives the LED head. The Main Controller Board receives data from the host device, analyzes commands, and processes the data for printing. To help you understand the structure of the printer system, refer to the Printer Block Diagram. The RPSS PCB is connected to the host system through a Centronics parallel interface, RS-232C interface or an AppleTalk interface. Interface selection is accomplished through menu settings. Once an interface is selected, the remaining interface connectors output BUSY (Emulation Mode only). The Main Controller Board receives print data and command strings from the host system, and generates bit image data. When one page of print data is ready, the Main Controller Board turns on the PRINT-N signal which is one of the video interface signals. Upon receipt of the PRINT-N signal, the Engine Driver Board turns ON the main motor, resist motor, and fuser in preparation for printing. The Engine Driver Board then sends the FSYNC-N and LSYNC-N signals to the Main Controller Board. Once the Main Controller Board receives the FSYNC-N and LSYNC-N signals, the WDATA-N signal (image data signal) is sent to the Engine Driver Board in synchronization with the WCLK-N signal. The Engine Driver Board turns ON the appropriate LEDs in conformance with the WDATA-N signal. In addition to the above, the Engine Driver Board controls the paper feed, paper transport, and xerographic processing actions necessary for printing. The Operation Panel is connected to the Main Controller Board via the LLCC PCB, the Engine Driver Board and the LNKZ PCB. The Operation Panel is controlled by the Main Controller Board. The optional Second Paper Tray (LLFC PCB) is controlled by the Engine Driver Board. The Main Controller Board contains 2 MByte of dynamic RAM. The Expansion Memory Board (REXM) provides an additional 2 Mbyte of dynamic RAM. Two font cards slots are available. Each font card contains ROM which provides additional fonts. The two connectors for the font cards are provided on the CMBZ PCB. The font card data is sent to the Main Controller Board through the LNKZ PCB. 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
2.2 PRINTER OVERVIEW 2.2.01 General Information This section describes the operation of the OL840 Printer in the following order: · Main Control Function · Printer Control Function · 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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Chapter 2 Principles of Operation
2.2.02 Main Control Unit The control unit controls reception of the data from the host through the interface, processes command analysis, bit image development, and raster buffer read. It also controls signal flow with the Engine Driver Board and the Operator Panel. Reception Control The control unit has three interface ports: centronics parallel, RS-232C serial, and Appletalk/RS-422 serial ports. Through the MENU, one of the I/F ports can be selected at a time. The other ports output BUSY in emulation mode, but not in PostScript mode. The Appletalk port is the default port. Command Analysis Processing The OL840 has PostScript and the following emulation modes which are selected through the printer MENU: · LaserJet Series II: Hewlett Packard · Diablo 630: Xerox In the Postscript mode, each typeface style is stored as a series of outlines, one for each character, comprised of lines and Bezier curves. The shape of each character in a typeface style is actually determined by a mathematical formula. When the document is to be printed, the host sends information to the printer in the form of the Postscript page description language. The printer then reads the file it receives, sizes and orients each character outline as required, and prints the page. In the HP and Diablo modes, the OL840 prints fonts as bit-mapped outlines. The outline of each character is determined by placing dots in a grid. A complete set of these grids, one for each character in the font, is stored in ROM. Since no special calculations are used in the HP mode, each typeface, style, weight, orientation and size is stored separately. Down Line Loaded (DLL) fonts and macro registration are stored in the DLL and macro areas of memory (RAM) Emulation and Postscript interpretation is performed under program control by the CPU. Font Processing In the emulation mode, the bit image in the font ROM is loaded by the CPU into the raster buffer (RAM). The raster buffer has a band buffer structure, new data is written to the raster buffer once the buffer has been read and becomes empty. In Postscript mode, the outline data stored in the programmed ROM is loaded into the RAM area called the font cache, the required font pattern is then transferred to the raster buffer. The buffer has a full-page buffer structure. One page of data is written at a time. After a page is written, another raster buffer read operation starts. Raster Buffer Read Operation The bit image written to the raster buffer by the CPU is converted to serial dot data to be read in
response to the VIDEO SYNCH signal. The first in-first out (FIFO) buffer is between the raster buffer and the serial dot data of the video interface (WDATA). The CPU can transfer data from the raster buffer to the FIFO automatically when the CPU reads the "OR-ING" memory area of the raster buffer. The CPU reads a line of data from the raster buffer before the LSYNC signal is received from the Engine Driver Board. Once LSYNC is received, reading starts. Then, in response to WCLK, parallel to serial conversion and data transfer takes place. The amount of data that is read from the FIFO is sensed by the 64NC22VIA counter. The CPU writes another line of data to the FIFO, immediately after a line of data is read from the FIFO. Engine I/F Processing The engine I/F is divided into the engine control interface and the command interface. The engine control interface signal is allocated to a signal line through bits of the register (TTL). The CPU can obtain the engine status by sensing each bit, or run the engine by manipulating each bit. The command I/F is a bidirectional serial signal. The register (TTL) is used for serial-parallel or parallel-serial conversion. Operation Panel Control The operation panel I/F is a bidirectional serial Interface. Each signal line is allocated to the 65NC22VIA port. The CPU then sends the shift clock and executes serial or serial-parallel conversion. 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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2.2.03 Main Controller Board (RPSS) The Main Controller Board (RPSS) can be accessed from the rear of the printer. The RPSS board consists of the CPU, RAM, VIA, FIFO, SCC, and one gate array. The CPU is a MC68000 with a clock frequency of 12.5MHz. Sixteen 1Mbit (1 bit x 1Mbit) dynamic RAM chips are mounted as resident RAM (total 2Mbytes). The VIA (Versatile Interface Adapter) ICO6G (65NC22) controls the Operation Panel interface, Printer Unit interface, read/write operations of FIFO (IC14G) and the EEPROM IC05H (X24C16). The FIFO (First in-First out Buffer) connects the CPU to the video interface. The FIFO has a capacity of over 2 lines (2 rasters). The data written to the FIFO by the CPU is sequentially read according to the VIDEO I/F synchronous signal. The Serial Communications Controller (SCC) controls the RS-232C interface, RS-422 interface, and the AppleTalk interface. The RS-422 and AppleTalk interfaces use the same connector and are usable only in the 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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Chapter 2 Principles of Operation
2.2.04 Program ROM Board (RPSR) The Program ROM (RPSR) Board is connected to the Main Controller Board. The RPSR board consists of: · Ten 1 Mbit EPROM chips (eight are for PostScript - two are for Emulation Mode) · Two 4 Mbit MASK ROM chips which store the bit-map fonts used in HP Laserjet and Diablo emulations · Three TTL IC chips, which function as an address decoder. 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
2.2.05 Connection Board (LNKZ) The LNKZ connection board contains a buffer used to connect the optional font cards to the Main 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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Chapter 2 Principles of Operation
2.2.06 Expansion RAM Board (REXM) Sixteen 1Mbit (1bit x 1Mbit) dynamic RAM (total 2M bytes) are mounted to the Expansion RAM Board. The RAM capacity is detected during the power-on sequence. The RAM capacity is printed during MENU PRINT in the Emulation Mode or START PAGE 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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Chapter 2 Principles of Operation
2.2.07 Font Card Up to two font cards for additional fonts can be installed. If the printer is in the off-line state (the READY lamp is off), the cards can be inserted and removed without removing power. When the font card is inserted and removed in the on-line state (the READY lamp is on), the message, CARD REMOVED ONLINE, will be displayed on the Operation Panel. 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 PRINTER CONTROL UNIT 2.3.01 General Information The principal hardware components of the printer control unit are listed below. · Engine Board · Power Supply Unit · Fuser Unit · Main Motor · LED Head · Sensors and Switches · Resist Motor · Fan · Operation Panel · Second Paper Tray Mechanism (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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Chapter 2 Principles of Operation
2.3.02 Engine Driver Board (LLAB-2) The Engine Driver Board contains an 80C51 Microprocessor (8-bit), an EPROM which stores the Engine Control Program and an EEPROM. The Engine Driver Board turns the LED Array diodes ON, to place an electrostatic image on the photosensitive drum. The Engine Driver Board also controls the paper feed, paper transport, and electrophotographic processing actions so that the electrostatic image can be printed by fusing toner on the paper. The 1-Kbit 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 (Top margin) · LED head drive time Notes: The EEPROM preserves the data while the supply voltage is off. The counters stored in the EEPROM can be accessed by using SW1 on the Engine Board to place the printer in the Maintenance MODE. (See Section 3) The count of the total number of sheets printed after installation cannot be reset. 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: It is reset to zero when the drum is replaced by holding down the RESET button and applying power to the printer. 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
2.3.03 Power Supply Unit The power supply unit generates the following voltages from the AC input voltage: High Voltage Drive The high-voltage circuit provides the charge voltage (about -6 Kvdc), transfer voltage (about +5 Kvdc), grid voltage (about -600vdc), and developer bias voltages (about -550vdc and -400vdc). Of these voltages, the charge voltage and the transfer voltage are generated by a high-voltage power supply. The grid connects to ground via a varistor on the medium-voltage generation circuit. This keeps the grid at about -680vdc during charging. Low Voltage Circuit This circuitry produces the voltages listed below. · +5 vdc: Printer Logic · +/- 12 vdc: Interface Signal Levels · +38 vdc: Resist/Main Motor Drive, Fan Drive Note: +5 vdc and +38 vdc are also supplied to the LLFC on the 2nd Paper Tray Mechanism 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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2.3.04 Fuser Unit The Fuser Unit is controlled by a thermistor, a comparator, an LSI, and the CPU to keep the heat roller surface temperature within a predetermined range (about 150 degrees Celsius). A thermal fuse within the Fuser Unit prevents abnormal temperature rises in case the thermistor fails. 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.) 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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2.3.05 Main Motor (Drum Motor) The Main Motor is controlled by the motor control LSI, IC5 (M54646). The motor used is a four-phase motor, driven by the DM-PHL 1, 2, 3 and 4 signals generated by the LSI. 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
2.3.06 LED Array Data for the 2,560 LEDs in the LED Array is placed in the shift register by the HD CLK signal. The data is loaded in the latch circuit by the HD LD signal. 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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2.3.07 Resist Motor The Resist Motor is driven clockwise for hopping, then counterclockwise for Paper Feeding by the motor drive IC (LB1731). 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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2.3.08 DC Fan The fan is controlled by the FAN ON-P signal from the LSI (MSM73H019). In order for the printer to operate, the signal FAN SENSE-N must be active. 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 set. Printing is 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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Chapter 2 Principles of Operation
2.3.09 Operation Panel The following components make up the operation panel: · 4-bit MPU (LC6543C) · LCD control driver (MSM6222B or HD44780) · LCD display (16 characters per line) · Operation panel sheet · LEDs (for online mode indication) Operation Buttons The Operation Panel is connected to the Main Controller Board via the Engine Connection Board, the Engine Driver Board and the Program Cartridge Connection Board. The Operation Panel is controlled by the Main Controller Board. The LCD control driver (MSM622B or HD44780) converts 4-bit character codes received from the MPU into 8-bit character codes and retrieves the character pattern data (font) from the internal character generator for display on the LCD. Operation Panel Interface The operation panel is controlled by the operation panel interface located on the Main Controller Board. Control is via the Engine Driver 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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2.3.10 Second Paper Tray Mechanism (Option) The 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 for the second paper tray 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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Service Guide OL840
Chapter 2 Principles of Operation
2.3.11 Sensor Functions The following alarms are detected by sensors and switches. During Power ON The inlet and outlet sensors are checked for their on and off states at power on time. · Inlet sensor on: Inlet jam error (paper supply jam) · Outlet sensor on: Outlet jam error (paper eject jam) The thermistor sensor detects if the fuser temperature reaches the desired temperature within the specified time. If the desired temperature is not reached, the fuser is turned OFF. The fan sensor circuitry checks for the rotation of the fan. If fan motion is not detected, the fuser is turned OFF, and power is removed from the fan. When a paper cassette with no paper loaded has been detected, the Paper-End Sensor sends the PAPER END signal to the Control Unit. When the power supply is turned ON, the number of printed pages of the fusing unit and drum cartridge is checked. If the Fuser or Drum life has been exceeded, this information is transmitted to the Control Unit. During Hopping Whenever the inlet sensor fails to detect paper within a predetermined time after a feed command has been issued to the paper supply system, the failure is counted. The hopping operation is then attempted up to three times. If the hopping operation still fails, an INLET JAM ERROR is displayed on the Operation Panel. During Feeding If the leading part of the paper does not reach the outlet sensor within a predetermined time after the start of feeding by the resist motor, a FEED JAM ERROR will be displayed on the Operation Panel. 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 OL840
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 u Follow the procedures listed in Adjustments and Service Settings. Adjustments may be required when either consumables o Cleaning procedures must be performed correctly if high print quality is to be achieved. 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 filter for toner) · Cloth (soft and lint-free) · All-purpose Cleaner · Grease (Dow Corning BR2 or equivalent) 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 OL840
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 filter for toner) · Cloth (soft and lint-free) · All-purpose Cleaner · Grease (Dow Corning BR2 or equivalent) 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 OL840
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. · Clear the drum counter when a new drum cartridge is installed. 1. Power OFF the unit. 2. Press and hold RESET while powering ON the unit. 3. The drum counter will reset. · Clear the fuser counter when a new fusing unit is installed. Refer to Section 3.3, Adjustments in 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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Service Guide OL840
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. 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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Service Guide OL840
Chapter 3 Maintenance & Disassembly
Sequence of Procedures Note: The disassembly procedures for the OL840 are identical to the OL800/820. All hardware assemblies, except the Main Controller Board, Program ROM Board, and Memory Expansion Board are identical. The OL840 does NOT use a Program Cartridge. The only procedures listed in this manual are for the OL840 Main Controller Board, Program ROM Board, and Memory Expansion Board. Refer to the OL800/820 Service Handbook for the remaining procedures ( ). The printer will be disassembled in the order listed below. 1. Upper Cover 2. Engine Unit 3. LED Head 4. Transfer Charger Assembly 5. Paper Supply Unit 6. Resist Motor 7. Tray Detection Circuit Board (LLCC) 8. Resist Roller Assembly 9. Engine Controller Circuit Board (LLAB-2) 10. Main Motor Assembly 11. Idle Gears A and B, and Reduction Gear 12. DC Fan Assembly 13. Power Supply Unit 14. Upper Unit 15. Fusing Unit 16. Backup Roller 17. Idle Gear C 18. Main Controller Board (RPSS) 19. Program ROM Board (RPSR) 20. Connection PCB (LLIC) 21. Connection Board (LNKZ) 22. Font Card Motherboard (CMBZ) 23. Optional RAM PCB (REXM) 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 OL840
Chapter 3 Maintenance & Disassembly
3.2.01 Main Controller Board (RPSS) 1. Power OFF the printer. 2. Remove the AC connector. 3. Remove the interface cable. 4. Pull the rear panel (1) backward and remove. 5. Loosen the four screws (2) on the inner panel (3). 6. Open the lock clips (4), and pull the main controller board (5) out. 7. Remove the inner panel. Note: The screws (2) are captive; they cannot be completely removed. The Program ROM Board is not shown in this drawing.
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 OL840
Chapter 3 Maintenance & Disassembly
3.2.02 Program ROM Board (RPSR) 1. Remove the main controller board (RPSS). (See 3.2.01) 2. Using a needle nose pliers, detach the nylon latches (1). 3. Lift the program ROM board (2) from the main controller board being careful not to lose the circuit board retainer clip (3).
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 OL840
Chapter 3 Maintenance & Disassembly
3.2.03 Optional Expansion RAM Board (REXM) 1. Remove the main controller board (RPSS). (See 3.2.01) 2. Pull up and remove the optional Expansion RAM PCB (1) from the connectors MEM (2).
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 OL840
Chapter 3 Maintenance & Disassembly
3.3 ADJUSTMENTS AND SERVICE CHECKS 3.3.01 General Information The first four adjustments (Actual Page Count, Modified Page Count, Vertical Print Start Position and LED Head Drive Time) are performed by changing addresses on the EEPROM located on the Engine Controller Printer circuit board. Please refer to Section Three of the OL800/820 Service Handbook for these procedures ( ).
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 OL840
Chapter 3 Maintenance & Disassembly
3.4 CLEANING 3.4.01 General Information Remove any dropped toner and dust. Clean inside and around the printer with a vacuum cleaner (equipped with a toner filter) when necessary. Refer to Section 3.4 of the OL800/820 Service Handbook for information on cleaning the printer ( ). 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 OL840
Chapter 3 Maintenance & Disassembly
3.5 LUBRICATION 3.5.01 General Information Refer to Section 3.5 of the OL830 Service Handbook for information on lubricating the printer ( ).
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 OL840
Chapter 3 Maintenance & Disassembly
3.6 CONSUMABLES The OL840 uses the same consumables as the OL800 and OL820. 3.6.01 Image Drum Counter Reset When the image drum cartridge is replaced, the image drum counter must be reset. 1. Press and hold RECOVER/RESET while powering on the printer. 2. This resets the counter. 3.6.02 Ozone Filter The ozone filter is replaced when the image drum cartridge is replaced. 1. Power off the printer. 2. Place a screwdriver in the slot under the lower portion of the fan cover and lift the screwdriver slightly to remove the fan cover. 3. Replace the filter. 4. Replace the cover. 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 OL840
Chapter 4 Failure & Repair Analysis
4.1 OL840 TROUBLESHOOTING 4.1.01 General Information Section Four of the OL800/820 Service Handbook should be used to troubleshoot the OL840. Listed below are the differences between troubleshooting the OL800/820 printers and the OL840 printers. · When told to replace the CTLZ Board, replace the RPSS Board. Both boards are Main Controller Boards. · When told to replace the Program Cartridge, replace the Program ROM Board. There is no Program Cartridge in the OL840. The printers firmware is located on the Program ROM Board. This board is attached to the Main Controller Board. · When told to replace the Memory Expansion Chip Set, replace the Memory Expansion Board (REXM). · When the Engine Control Board (LLAB-2), is replaced, remember that the OL840 EEPROM is NOT identical to the OL800/820 EEPROM. 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 OL840
Chapter 4 Failure & Repair Analysis
4.1.02 LCD Display Messages (PostScript Mode) The following messages may be displayed when the printer is in the PostScript mode. Refer to Section Four of the OL800/820 Service Handbook for LCD Messages displayed in the Emulation Mode ( ).
LCD MESSAGE ON-LINE .PS IDLE OFF-LINE .PS
DEFINITION The printer is in the online mode. The printer is in the off-line mode. The printer receives data but does not process any data. The printer is processing the received data Waiting for receive data.
CORRECTIVE ACTION Normal Indication Normal Indication
ON-LINE .PS PROCESSING ON-LINE .PS WAITING ON-LINE .PS PRINTING ON-LINE .PS PRINTER BUSY
Normal Indication
Normal Indication
The printer is printing received data.
Normal Indication
The ON-LINE key is pressed during processing waiting or printing.
Recovers automatically. Otherwise press the RECOVER key to return to IDLE. Normal Indication
ON-LINE .PS FLUSHING JOB
After PRINTER BUSY appeared the RECOVER key was pressed and all data in the receive buffer was invalidated. The start page setting was ON when the power was turned on. Printing starts from the start page in about one minute.
DOING START PAGE
Normal Indication
ON-LINE .PS CHANGE DRUM
The drum is aging .
Replace the drum Change the software to the emulation mode hold down the recover key and turn on the power. Check that DRUM CTR RESET appears on the LCD. Replace the thermal fuser and reset the fuser counter. Replace the toner cartridge. Normal Indication Try reinstalling the Font Card. Replace the Font Card. Normal Indication. Will be displayed when switching between software modes (Postscript and Emulation).
ON-LINE. PS FUSER LIFE ON-LINE .PS TONER LOW WARMING UP ERROR CARD
End of thermal fuser life.
The printer is low on toner.
The printer is warming up. There is an error in the data on the font card (checksum error).
INITIALIZING
Firmware is initializing
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 OL840
Chapter A Reference Charts
A.1 OVERVIEW A.1.01 General Information This section describes the characteristics of the printed circuit boards used in the printer. The following areas are covered. · Firmware · Fuses · Jumpers · Switches · Sensors · Test Points Where an item is not applicable, the word NONE will be listed. 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 OL840
Chapter A Reference Charts
A.2 CHARTS Index to Charts Description Acronym Section Main Control Board (without ROM) Program ROM Board RAM Board RPSS RPSR REXM A.2.01 A.2.02 A.2.03
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 OL840
Chapter A Reference Charts
A.2.01 Main Control Board (RPSS) Firmware NONE Fuses NONE Jumpers T1: +5vdc at Pin 18 of Centronics Parallel Interface 1-2: +5vdc not present 2-3: +5vdc present T2: +5vdc at Pin 18 of RS232-C Serial Interface 1-2: +5vdc not present 2-3: +5vdc present Sensors NONE Switches NONE Test Points NONE
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 OL840
Chapter A Reference Charts
A.2.02 Program ROM Board (RPSR) Firmware O1A (4M bit) (Masked) Bit-mapped Fonts O1B (4M bit) (Masked) Bit-mapped Fonts 02A through 09A (8 PROMS) - Postscript Interpreter 02B / 03B - Program for Emulation Mode Fuses NONE Jumpers NONE Sensors NONE Switches NONE Test Points NONE Notes: When using XON/XOFF Protocol, the OL840 will lockup when receiving serial data after the buffer fills and it attempts to send the first DC3. In order to correct this problem on field units, FCO 7761 should be installed. The emulation PROMS (02B, 03B) on the program ROM board (RPSR) are replaced with Rev. 1.41. Field Units Covered by the FCO Serial Numbers 010A0015157 and below (120 volt) Serial Numbers 010A0000144 and below (220 volt) Kit Part Number: 58221301 Order this kit through Okidata Logistics.
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 OL840
Chapter A Reference Charts
A.2.03 RAM Board (REXM) (Option) Firmware NONE Fuses NONE Jumpers NONE Sensors NONE Switches NONE Testpoints NONE
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 OL840
Chapter B Illustrated Parts Listing
B.1 COMPATIBILITY CHARTS Parts which are unique to the OL800 and OL820, +, + Item 61 62 Description PCB: CTLZ (Main Controller) PCB: PRGZ (w/o ROM) Okidata Part Number 55046101 55046501
Parts which are unique to the OL820, +, + Item 63 Description PCB: OkiXpress Scalable Font Card (w/ROM) Okidata Part Number 21025001
Options which are interchangeable between the OL800 and OL820, +, + Item 64 65 Description PCB: MEMZ Okidata Part Number 55046601 55050001
PCB: CMIZ (Multi-port) PCB: RMIZ (Multi-port)
66
55050101
Parts Unique to the OL840 Item 67 Description PCB: RPSS Board) (Main Controller Okidata Part Number 55051001
68
EEPROM: For use on Engine Control Board PCB: ROM RPSR (PROM Board) w/o
55921901
69
55051101
Options Unique to the OL840 Item 70 Description PCB: REXM (2MB RAM) Option Okidata Part Number 55051601
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 OL840
Chapter B Illustrated Parts Listing
Interchangeable Parts (OL800, OL820 and OL840) Parts which are interchangeable between the OL800,, OL820 and OL840, +, + Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description Assembly: Exit Roller Assembly: Face-Up Stacker Cover: Upper (Program Cartridge) Cover: Lower (Program Cartridge) Assembly: Resist Roller Assembly: Back-Up Roller Assembly: Transfer Charger Roller: Hopping (Assembly) Panel: Operation (Assembly) Unit: Lower Cover: Upper (Assembly) Panel: Inner Unit: Paper Delivery Spring: Bias (LED Head) Spring: Clamp (LED) Spring: Fusing Unit Okidata Part Number 50066501 50066601 50070201 50070301 50079101 50079201 50081601 50081701 50213502 50213602 50213902 50214402 50214502 50914101 50914301 50914601
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
Spring: Backup Roller Spring: Cassette Spring: Separator Spring: Image Drum Tray Gear: Idle "A" Gear: Idle "B" Gear: Idle (Base) Gear: Speed Reduction Base: Lower Panel: Front (R) Panel: Blind Panel: Front (L)-B Panel: Rear Post Separator Fuser Pad Contact: Ground Foot: Rubber Cable Cable Panel: Inner
50914801 50917001 50917101 50917205 51218401 51218501 51218601 51218701 53059401 53059501 53059601 53059701 53059801 53329501 53500501 53500901 53505201 53505301 53505430 53505431 53534201
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
PCB: LLAB-2 (Engine Controller) w/o ROM PCB: LLCC (Engine Connection) Unit: Fusing (120V) PCB: LLID PCB: CMBZ PCB: LLIC PCB: LNKZ PCB: LLBB High Voltage Microswitch Assembly - Cover Open Filter: Ozone Unit: LED Head IC: EEPROM (LLAB) 84 Power Supply (120V) Motor: Pulse (Resist) Motor: Pulse (Main) Assembly: DC Fan Cord: AC Connector: AKJ-40A Unit: Upper (240V) Roller: Hopping (2nd Tray) Unit: Fusing (240V)
55044402 55044601 55044901 55046001 55046201 55046301 55046401 55047301 55050701 55503501 55619501 55921901 56407702 56507401 56507701 56508501 56609701 56725201 50213702 53534301 55044902
59 60
PCB: LLFC (2nd Tray) Power Supply (240V)
55051401 56408102
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)