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Service Guide PM3410
Chapter 0 About This Manual
Pacemark 3410
Dot Matrix 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 PM3410
0 About This Manual Front Cover Manual Copyright 1 Product Specifications 1.1 Overview 1.2 Physical Specifications 1.3 Power Requirements 1.4 Environmental Conditions 1.5 Agency Approvals 1.6 Operational Specifications 1.7 Paper Specifications 1.8 Memory Specifications 1.9 Consumables 1.10 Options 1.11 Reliability 2 Principles of Operation 2.1 Electrical Operation - General Information ....2.1.02 Microprocessor (MPU) and Peripheral Circuits ....2.1.03 Initialization ....2.1.04 Interface Control ....2.1.05 Printhead Drive Circuit ....2.1.06 Spacing Drive Circuit ....2.1.07 Line Feed Circuit ....2.1.08 Alarm Circuits ....2.1.09 Paper End Detection Circuit ....2.1.10 Power Supply 2.2 Mechanical Operation - Printhead Mechanism ....2.2.02 Spacing Mechanism ....2.2.03 Ribbon Drive Mechanism ....2.2.04 Paper Feed Mechanism ....2.2.05 Paper-End Detection Mechanism ....2.2.06 Automatic Paper Loading ....2.2.07 Paper Park Feature 3 Maintenance & Disassembly 3.1 Overview ....3.1.02 Maintenance Items ....3.1.03 Maintenance Precautions 3.2 Disassembly/Assembly Procedures ....3.2.01 Printhead (with Preliminary Items) ....3.2.02 Ribbon Protector Assembly ....3.2.03 Upper Cover Assembly ....3.2.04 Operator Panel 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 ....3.2.05 Interface Connector Board ....3.2.06 Main Logic (CBNP) Board ....3.2.07 Printer Mechanism ....3.2.08 Power Supply Unit ....3.2.09 Printer Unit ....3.2.10 BTFD PCB ....3.2.11 Tension Spring ....3.2.12 Bottom Push Mechanism and Front Door Assembly ....3.2.13 Drive Pulley and Belt ....3.2.14 Tractor Assembly (BTF) ....3.2.15 Line Feed Motor (BTF) ....3.2.16 Platen Assembly ....3.2.17 Paper Pressure Guide ....3.2.18 Line Feed Motor Assembly ....3.2.19 Ribbon Cartridge Bracket ....3.2.20 Fan Assembly ....3.2.21 Head Cable Assembly ....3.2.22 Carriage and Carriage Shaft ....3.2.23 Ribbon Feed Assembly ....3.2.24 Space Motor Assembly ....3.2.25 Space Belt ....3.2.26 Sensor Board (LPRW) ....3.2.27 Bail Motor/Gear Assembly ....3.2.28 Paper Bail Assembly ....3.2.29 Rear Feed Tractor Assembly ....3.2.30 Printhead Gap/Release Lever Microswitches ....3.2.31 Release Lever / Gear Assemblies 3.3 Printer Adjustments ....3.3.02 Printhead Gap ....3.3.02 Line Feed Belt Tension ....3.3.03 Key Combinations ....3.3.04 Menu Operation ........Menu Settings ....3.3.05 Top Of Form ....3.3.06 Paper Park ....3.3.07 Forms Tear Off ....3.3.08 Resets 3.4 Cleaning 3.5 Lubrication ....3.5.02 Areas Not Lubricated ....3.5.03 Lubrication Diagrams ........Right and Left Sides of Printer ........Carriage Shaft ........Ribbon Feed Assembly
Page 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
Table of Contents ........Space Motor Assembly ........Tractor Feed Assembly 3.6 Shipping Instructions ....3.6.02 All Other Returns 4 Failure & Repair Analysis 4.1 Failure & Repair Analysis - Introduction ....4.1.02 Printer Serial Number Identification 4.2 Reporting Problems ....4.2.02 Problem Lists ....4.2.03 Reporting Methods 4.3 Troubleshooting Updates 4.4 Troubleshooting Tips ....4.4.02 Problem Categories ....4.4.03 START HERE Flowchart ....4.4.04 Tips for Preventing Image Problems ....4.4.05 Common Problems 4.5 Abnormal Output 4.6 Fault Alarms 4.7 Repair Analysis Procedures (RAPS) ....4.7.02 RAP Index ........RAP 01: Power Lamp Does Not Light ........RAP 02: Spacing Error ........RAP 03: Head Homing Error ........RAP 04: Bail Homing Error ........RAP 05: Ribbon Feed Problem ........RAP 06: Wrong Character, Character Omission or Dot Omission ........RAP 07: Line Feed Problem ........RAP 08: Malfunction of Operator Panel Switch ........RAP 09: Data Receiving Failure ........RAP 10: ALARM Lamp ON ........RAP 11: Bottom Tractor Feed Unit (BTFU) Problem 4.8 Printer Tests - Rolling Ascii Test ....4.8.02 Font Sample Test ........Sample - Part 1 ........Sample - Part 2 ....4.8.03 Serial Interface Diagnostic ....4.8.04 Hexadecimal Dump 4.9 Resistance Checks ....4.9.02 Printhead ....4.9.03 Line Feed Motor ....4.9.04 Space Motor ....4.9.05 Bail Motor A Board Diagrams
Page 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123
Table of Contents A.1 Overview A.2 Index To Charts ....A.2.01 Main Logic Board (CBNP) ....A.2.02 Power Supply Board ....A.2.03 Interface Board (HKTY) ....A.2.04 Sensor Board (LPRW) ....A.2.05 Operator Panel Board (OPML) ....A.2.06 Bottom Tractor Feed Unit Board (BTFD) 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 Upper Cover Assembly ....B.2.03 Printer Unit ....B.2.04 Operator Panel Assembly ....B.2.05 Carriage Assembly ....B.2.06 Printer Mechanism (1 of 2) ....B.2.07 Printer Mechanism (2 of 2) ....B.2.08 Bottom Tractor Feed Unit ....B.2.09 Options ....B.2.10 Pull Tractor Unit (Option) ....B.2.11 Packing Materials ....B.2.12 Consumables ....B.2.13 Documentation
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Service Guide PM3410
Chapter 0 About This Manual
This document may not be reproduced without the 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 January, 1992 Second Edition October, 1994 P/N 59249701 P/N 59249702
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.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. MICROLINE is a trademark of Oki Electric Industry Company, Ltd. PACEMARK is a trademark of Oki Electric Industry Company, Ltd. IBM and Proprinter are registered trademarks of International Business Machines Corporation. Centronics is a registered trademark of the Centronics Corporation Epson and Epson FX are registered trademarks of Seiko Epson 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 PM3410
Chapter 1 Product Specifications
1.1 OVERVIEW 1.1.01 General Information The Pacemark 3410 is a high speed, dot matrix printer, which utilizes a 9 pin printhead. The printer is capable of emulating the IBM Proprinter or the Epson FX printers. The Pacemark 3410 comes standard with both an RS232-C Serial Interface and a Centronics Parallel Interface. Also standard is the bottom push tractor feed unit.
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Service Guide PM3410
Chapter 1 Product Specifications
1.2 PHYSICAL SPECIFICATIONS 1.2.01 Printer Dimensions
NOTE: Dimensions include the bottom feed unit.
Width: 25.5 inches (54.0 centimeters) Depth: 19 inches (48.3 centimeters) Height: 15 inches (20.3 centimeters)
1.2.02 Printer Weight 63 pounds (25.4 kilograms) United Parcel Service (UPS) shippable
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Service Guide PM3410
Chapter 1 Product Specifications
1.3 POWER REQUIREMENTS 1.3.01 Input Power Input Voltage 120 VAC +5.5%, -15% 220/240 +10%, -10% Frequency 50/60 hz. +/-2% 1.3.02 Power Consumption Operating: 75 W Idle: 30 W
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Service Guide PM3410
Chapter 1 Product Specifications
1.4 ENVIRONMENTAL CONDITIONS 1.4.01 Acoustic Rating 58.5 dBa 1.4.02 Altitude 10,000 feet (3,048 meters) 1.4.03 Ambient Temperature and Relative Humidity In Operation 41 to 95 degrees Fahrenheit (5 to 35 degrees Celsius) @ 20% - 80% Relative Humidity In Storage 14 to 122 degrees Fahrenheit (-10 to 50 degrees Celsius) @ 5% - 95% Relative Humidity
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Service Guide PM3410
Chapter 1 Product Specifications
1.5 AGENCY APPROVALS 1.5.01 Listings North America FCC Class B UL 478 (Office Machines and Business Equipment) CSA 22.2 (220)
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Service Guide PM3410
Chapter 1 Product Specifications
1.6 OPERATIONAL SPECIFICATIONS
1.6.01 Character Matrix Sizes
Print Mode Near Letter Quality Utility High Speed Draft
Horizontal 24 12 9
Vertical 17 9 9
1.6.02 Characters Per Line 136 Characters @ 10 cpi 163 Characters @ 12 cpi 204 Characters @ 15 cpi 233 Characters @ 17.1 cpi 272 Characters @ 20 cpi 1.6.03 Character Pitches 10, 12, 15, 17.1, 20 1.6.04 Character Sets Standard ASCII Epson Character Set I Epson Character Set II IBM Character Set I IBM Character Set II IBM ALL (Proprinter) Character Set Foreign Language Substitution (International Characters) Line Graphics Code Pages: 850, 863 1.6.05 Emulations
NOTE:
The Plug-in Chip Set for Microline/Pacemark Emulation is installed by a technician.
Resident Epson FX-1050 IBM Proprinter III Optional Plug-in Chip Set Microline/Pacemark 1.6.06 Fonts Standard Near Letter Quality Courier Gothic Proportional Draft Utility High Speed Draft Custom Characters Barcode Code 128 (ABC) Code 3 of 9 EAN 8 EAN 13 Interleaved 2 of 5 POSTNET UPC-A UPC-E 1.6.07 Front Panel Switches
Select Menu Mode Line Feed Form Feed Top of Form 1.6.08 Graphics Resolution Maximum: 240 x 216 dots per inch (dpi) 1.6.09 Interface Methods Standard Centronics Parallel Interface
Paper Park Pitch Selection Print Quality Selection Tear Micro Feed Up / Down
RS232-C Serial Interface (19.2 KB) Optional Twin-ax or Co-ax Available from a third party vendor. Call 1-800-OKIDATA [1-800-654-3282] for more information. 1.6.10 Line Feed Increments 1/6" (Selected through the Menu) 1/8" (Selected through the Menu) n/72" n/144" n/216" 1.6.11 Line Feed Time 10.0 Inches Per Second (IPS) slew rate (when Printhead Gap Lever is set at 1 or 2)
6 IPS slew rate (when Printhead Gap Lever is set at 3 or 4) 5 IPS slew rate (when Printhead Gap Lever is set at 5 through 9)
1.6.12 Menu Mode Print: Prints the entire menu. Group: Selects Group Function Item: Selects Item Set: Selects Item Value Exit: Exits Menu Mode, Enters Select 1.6.13 Paper Feed Methods Built-in Push Tractor (Bottom) Built-in Push Tractor (Rear) Friction Feed (Top) Bottom Push Tractor Feed Unit Optional Pull Tractor (Bottom / Rear) Optional Cut Sheet Feeders (Single and Dual Bin) 1.6.14 Paper Feed Paths
Bottom Feed Rear Feed Top Feed Special Features Paper Park Automatic Paper Loading
Forms Tear Off 1.6.15 Paper Loading Auto Bail Arm for Auto Loading 1.6.16 Paper Out Detection Distance from end of paper Rear Feed: 2.30 inches (58.42 mm) Bottom Feed: .94 inches (23.88 mm) Cut Sheet: .93 inches (23.62 mm)
1.6.17 Paper Tear Capabilities Form Tear-Zero Tear Metal Tear Bar 1.6.18 Print Method Printhead Type General Information Impact, Dot Matrix Staggered, 9 pin, stored energy printhead 0.36 mm diameter pins Installed by Service Technician The Printhead Gap Adjustment must be performed when the printhead is replaced. Overheat Protection
When the printhead temperature reaches 115 degrees Celsius, the printer stops bi-directional printing. Uni-directional printi If the temperature continues to rise (125° Celsius), printing stops. Printing will resume when the printhead temperature drops below 115 degrees Celsius.
1.6.19 Print Modes Near Letter Quality (NLQ) Utility High Speed Draft 1.6.20 Print Speeds
Pitch 10 cpi 12 cpi 15 cpi 17.1 cpi 20 cpi
High Speed Draft 550 cps 550 cps 550 cps 550 cps 550 cps
Utility 417 cps 417 cps 417 cps 417 cps 417 cps
Near Letter Quality 104 cps 104 cps 104 cps 104 cps 104 cps
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Service Guide PM3410
Chapter 1 Product Specifications
1.7 PAPER SPECIFICATIONS 1.7.01 Types Card Stock Weight: 120 lbs. (450 g/m 2 ) Maximum Width: 5 to 14 inches (12.7 to 35.6 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: .02 inches (0.5 millimeters) Paper Feed Path: Bottom Head Gap Lever Setting: 8 - 9 Continuous Form Weight: Single Part 12 - 24 lb. (45 to 90 g/m 2 ) Multi-Part, Carbonless 9 - 11 lb. (35 to 40 g/m 2 ) Multi-Part, Interleaf Paper 10 - 12 lb. (38 to 45 g/m 2 ) Carbon 9 lb. (35 g/m 2 ) Width: 3 to 16 inches (76.2 to 406.4 millimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: 0.014 inches (0.36 millimeters) Rear Feed 0.02 inches (0.5 millimeters) Bottom Feed Paper Feed Path: Rear or Bottom Head Gap Lever Setting: 1 Single Part 12 - 15 lb. (45 to 56 g/m 2 ) 1 - 2 Single Part 20 - 24 lb. (75 to 90 g/m 2 ) 2 - 3 Two Part 3 - 4 Three Part 5 Four Part 6 Five Part 7 Six Part Cut Sheet Weight: 12 to 24 lbs. (45 to 90 g/m 2 ) Width: 7.2 to 14.3 inches (18.3 to 36.3 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: 0.014 inches (0.325 millimeters) Maximum Paper Feed Path: Top Head Gap Lever Setting: 1 12 - 15 lb. (45 to 56 g/m 2 )
1 - 2 20 - 24 lb. (75 to 90 g/m 2 ) Envelopes Weight: 24 lbs. (90 g/m 2 ) Maximum Size: Single Feed Minimum: 6.5 x 3.6 inches (16.5 x 9.1 centimeters) Maximum: 9.5 x 4.1 inches (24.1 x 10.4 centimeters) Continuous Non-overlap type Thickness: .014 inches (.325 millimeters) Maximum Paper Feed Path: Bottom Head Gap Lever Setting: 5 - 9 Labels Weight: N/A Width: 3 to 16 inches (7.62 to 40.64 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: .011 inches (0.28 mm) Maximum (including backing) Paper Feed Path: Bottom Head Gap Lever Setting: 3 - 4 Transparency
NOTE: Roller marks may mar the transparency under high temperature / high humidity conditions.
Weight: 12 to 24 lbs. (45 to 90 g/m 2 ) Width: 7.2 to 14.3 inches (18.3 to 36.3 centimeters) Length: 3 to 17 inches (7.62 to 43.18 centimeters) Thickness: 0.14 inches (0.36 millimeters) Paper Feed Path: Top Head Gap Lever Setting: 1 12 - 15 lb. 1 - 2 20 - 24 lb. 1.7.02 Length
NOTE: The recommended length is specific to paper type.
Rear Feed Minimum 3 inches (7.62 centimeters) Maximum 17 inches (43.18 centimeters) Bottom Feed Minimum 3 inches (7.62 centimeters)
Maximum 17 inches (43.18 centimeters) Top Feed Minimum 3 inches (7.62 centimeters) Maximum 17 inches (43.18 centimeters) 1.7.03 Number of Copies Original + 5 Interleaf Original + 7 Carbonless Original + 3 Cut Sheet (top edge must be glued tight) 1.7.04 Thickness 0.014 inches / 0.36 mm Maximum Thickness, Rear Feed 0.020 inches / 0.50 mm Maximum Thickness, Bottom Feed 1.7.05 Weight
NOTE: The recommended weight is specific to paper type.
Minimum: 9 lb. (35 g/m 2 ) Maximum: 24 lb. (90 g/m 2 ) 1.7.06 Width
NOTE: The recommended width is specific to paper type.
Minimum: 3 inches Maximum: 16 inches
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Service Guide PM3410
Chapter 1 Product Specifications
1.8 MEMORY SPECIFICATIONS 1.8.01 EEPROM Internal Control, Menu = 256 bits 1.8.02 RAM Total RAM = 64 Kbytes Print Buffer = 28 Kbytes DLL Buffer = 0 to 31 Kbytes 1.8.03 ROM Resident: Program ROM = 256 Kbytes
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Service Guide PM3410
Chapter 1 Product Specifications
1.9 CONSUMABLES 1.9.01 Ribbon Black Cartridge Type: Nylon Fabric Ribbon Life: Approximately 7.5 million characters
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Service Guide PM3410
Chapter 1 Product Specifications
1.10 OPTIONS 1.10.01 Cut Sheet Feeders CSF 3001 Single Bin and CSF 3002 Dual Bin 14 inches wide User installable Sheet Capacity 170 sheets of 16 lb. 100 sheets 24 lb. Paper Width 7.2 to 8.5 inches (18.3 to 21.6 centimeters) Paper Length 10.1 to 14 inches (25.7 to 35.6 centimeters) 1.10.02 Pull Tractor with Acoustic Cover Use with bottom feed for continuous forms, labels, and / or invoices. 1.10.03 Microline/Pacemark Emulation Chip Set Technician installable 1.10.04 Printer Stands Available through a Third Party Vendor. For more information, please call 800-749-2258 (Pacemark ONLY) 800-827-2672 (all printers) 1.10.05 Twin-ax / Co-ax Available through a Third Party Vendor. For more information, please call 508-777-7957.
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Service Guide PM3410
Chapter 1 Product Specifications
1.11 RELIABILITY 1.11.01 Mean Time Before Failure (MTBF) Approximately 8,000 hours @ 25% Duty Cycle, 35% Page Density Approximately 2,000 hours @ 100% Duty Cycle 1.11.02 Mean Time To Repair (MTTR) Approximately 15 minutes @ major sub-assembly level 1.11.03 Printer Life Approximately 16,000 Hours @ 25% Duty Cycle, 35% Page Density 1.11.04 Printhead Life Approximately 200,000,000 characters (average) @ 10 cpi Draft Mode @ 25% Duty Cycle, 35% Page Density 1.11.05 Ribbon Life Approximately 7.5 million characters 1.11.06 Warranty (Limited) One year parts, labor, printhead 1.11.07 Service 90 days, on-site
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1 ELECTRICAL OPERATION 2.1.01 General Information The main logic board consists of the microprocessor, its peripheral LSI circuits, ROM, DRAM and the drive circuits. The voltages for the main logic board are supplied by the power supply unit. The voltages for the various electrical components (motors, sensors, etc.) are distributed from the main logic board.
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.02 Microprocessor (MPU) and Peripheral Circuits Microprocessor Q3: M67X640V1 The MicroProcessor Unit (MPU) is the nucleus of the control circuit. Various peripheral circuits operate under program control of this microprocessor. The MPU (Q3) controls all aspects of printer operation. Program ROM for the MPU Q4: 27C202K This 2Mbit Read Only Memory (ROM) contains the control program for the printer. The MPU operates under program control. This ROM also stores the resident character fonts. DRAM Q10 and Q11 The Dynamic Random Access Memory (RAM) chips, each consisting of 64 K x 4 bits, are used as the Command Buffer, Receive Buffer and Print Buffer. The total buffer size is 64 K x 8 bits. The RAM speed is 120 ns. EEPROM Q14: 93C06N This 256-bit serial Electrically Erasable and Programmable Read Only Memory (EEPROM) stores the menu data and initial settings for the LSI circuits. Interface/Motor Control LSI Q5: B562 13497 This LSI controls the following functions listed below. Space Motor Enable / Speed Control To obtain the carriage speed instructed by the microprocessor, Q5 uses the signals SP - Phase A and SP - Phase B, derived from space motor movement to generate the pulse width timing and overdrive time. Line Feed Motor Phasing Control To turn the line feed motor in the proper direction, this LSI sends motor drive signals (properly phased) to the line feed driver (TRA4). Bail Motor Phasing Control To turn the bail motor in the proper direction, this LSI sends motor drive signals (properly phased) to the bail driver (TRA3). Dot ON Timing signal generation Q5 uses the signals SP - Phase A and SP - Phase B, derived from space motor movement, to produce the signal IPT. This signal (IPT) is used to enable the print wires at the desired carriage position. Printhead / Bottom Tractor Feed Control LSI
Q2: B563 12597 This LSI enables the printhead drivers and is the interface between the bottom tractor feed unit (BTFD PCB) and the MPU. The functions of this LSI are described below. Printhead Drive Control Printhead drive correction modifies the drive time under the following circumstances: Drive time correction for drive voltage fluctuations Drive time correction for head gap setting. Bottom tractor feed unit control
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.03 Initialization The printer is initialized whenever it is powered ON or when the I-PRIME signal is received from the host at the parallel interface. The initialization process is performed as listed below. 1. The reset circuit sends the RST-P signal to the MPU and LSIs. 2. ROM program execution starts with the mode setting of Q2 and Q5. 3. ROM and RAM are checked for errors. 4. RAM is initialized. 5. Bail and carriage homing is performed. 6. The interface signals (output level of ACK, BUSY, etc.) are set. 7. The SELECT lamp is turned ON. 8. The printer signals the host computer that it is ready to receive data. Block Diagram
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.04 Interface Control The printer is capable of serial or parallel operation. The desired interface method is selected by sliding the interface cover to expose the desired connector. When this is done, the interface select switch is turned ON or OFF to inform the Interface/Motor Control LSI (Q5: B562 13497) of the selected interface. Parallel Interface When the interface select switch is turned OFF, the parallel interface is selected and Q5 is in the parallel interface mode. The data from the interface is received through connector (CN-1) and Q5 latches this data in sync with the STB signal. The BUSY signal is turned ON as the data is processed. When processing is completed, the BUSY signal is turned OFF and an ACK signal is sent to the host to request more data. The BUSY signal is also turned ON when the printer is not able to receive data (the Print Buffer is full, the printer is deselected or an error condition exists).
RS232-C Serial Interface When the interface select switch is turned ON, the serial interface is selected and Q5 is in the serial interface mode. The RS232-C interface signals (DSR, CTS, CD and RD) are converted to TTL levels by the line receiver (Q13) and input to Q5 where the serial data is converted to parallel data. The interface signals (DTR, RTS, SSD and TD) output from Q5 are converted from TTL levels to RS232-C levels by the line driver (Q12) and sent to the serial interface connector.
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.05 Printhead Drive Circuit This circuit is used to drive the 9 print wires. The signals HD01 through HD09 from Q2 are used to enable the individual wire drivers (TRA1 and TRA2). TRA1 drives Pins 1, 2, 6 and 7. TRA2 drives Pins 3, 4, 8 and 9. TR7 drives Pin 5. The HD ON signal enables the drive circuit when printing is desired. The head drive duration is determined by an RC integrating circuit which modifies the HD ON pulsewidth. The pulsewidth of the HD ON signal varies with the number of pins being driven. The drive time is increased as a greater number of pins are driven, but decreased as less pins are to be driven. The drive time is also increased if the head gap lever in placed in positions 3 through 9. The RC circuit is also used to compensate for the fluctuation of drive voltage (+38vdc).
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.06 Spacing Drive Circuit After receiving a spacing command from the MPU (Q3), the Interface/Motor Control LSI (Q5) outputs the SPFWD signal to run the DC motor in the forward direction, or the SPRVS signal to run the DC motor in the reverse direction. This is a fixed pulsewidth signal. To control the motor speed, Q5 varies the pulse duty cycle according to feedback received from the space motor. As the space motor rotates, the SPSP Board (inside the motor housing) generates feedback pulse signals SPfA and SPfB. Q5 detects the edge pulses from these signals and divides the frequency to output the IPT signal for use in printhead dot timing. The space motor interlock switch (located at the left side of the shield plate) disables the space motor drive signals whenever the printer cover is open. Fuse F1 (3.5 amperes) protects the +38vdc space motor power circuit, should an overdrive condition exist.
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.07 Line Feed Circuit Whenever it is in a stopped position, the line feed motor shaft is held stationary by +8vdc, which is enabled by the LFCHOP Signal from Q2. The holding current is approximately 30 ma. During a line feed operation, the line feed motor is driven by +38 vdc in accordance with the LFOVDV signal. The signals LF - Phase 01 and LF - Phase 04 establish the proper phase relationship for driving the motor. However, the line feed motor uses Phase 1 - 4.
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Service Guide PM3410
Chapter 2 Principles of Operation
2.1.08 Alarm Circuits Fault Alarm Circuit (in Power Supply Unit) This protective circuit turns off the power supply when a fault occurs in the printhead, line feed, or bail motor drive circuits, thus preventing secondary component failure. To accomplish this, the circuit monitors the overdrive signal of each drive circuit. If the duration of any drive circuit exceeds a predetermined length of time, the appropriate signal (EVN COM, ODD COM, LF COM or BM COM) will be sent to the fault alarm circuit. The fault alarm circuit generates the ALM signal which causes the power supply to turn all DC power OFF. Printhead Overheat Alarm Circuit In order to protect the printhead coils, this circuit monitors the printhead temperature by using a thermistor contained in the printhead. The CPU senses this circuit every time a line is printed. When printing, the printhead temperature will increase. If the head temperature reaches approximately 115° Celsius, a head overheat ALARM 1 is generated. When ALARM 1 is detected by the MPU, the printer will begin unidirectional printing. If the printhead temperature increases to 125° Celsius, ALARM 2 is generated and printing is halted until the head temperature decreases. When the head temperature returns below the ALARM 1 threshold, printing is resumed. Cover Open Alarm Circuit When the front access cover is opened, the CVOPEN-N signal is sent to the MPU from the cover interlock microswitch. The MPU will halt printing immediately and light the ALARM Lamp.
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Chapter 2 Principles of Operation
2.1.09 Paper End Detection Circuit
NOTE: Paper End is also known as paper out
Whenever the release lever is in the Tractor (Continuous) Feed position, paper end is detected by the microswitch on the push tractor (rear feed) or the paper end sensor on the sensor board (bottom feed). Whenever the release lever is in the Friction (Sheet) Feed position, Paper End is detected by a photosensor (top feed) located in the paper pressure guide. When the printer detects an out of paper condition, the PEN (Paper End) signal goes low, the printing is stopped and the ALARM LAMP is turned ON.
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Chapter 2 Principles of Operation
2.1.10 Power Supply This switching power supply converts the AC input voltage to +5vdc, +/-8vdc and +38 vdc for use throughout the printer.
Voltage / Signal Table
Voltage/Signal
Purpose
+5 vdc
IC logic Levels - LED Drive Voltage
+8 vdc
Serial Interface logic Levels - Line Feed Motor Locking Voltage
-8 vdc
Serial Interface logic Levels
+38 vdc
Printhead Space Motor Line Feed Motor Bail Motor Drive Voltage
POW ALM
Output from the Power Supply in the event of an abnormal temperature rise in the power supply unit or an overcurrent condition of the +38 vdc. The main logic board suppresses this condition by temporarily suspending printing. If the condition does not change the main logic board will enable the FAN ALARM. Refer to Section 4 - Failure Analysis
ALM
Input from the main logic board upon detection of an overdrive condition in the printhead line feed motor or bail motor drive circuits. Upon detecting this signal the power supply disables the +38 vdc output.
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Chapter 2 Principles of Operation
2.2 MECHANICAL OPERATION 2.2.01 Printhead Mechanism The printer uses a highly efficient stored energy type printhead. Power is not consumed until the printwires are activated, thereby extending the printhead life to approximately 200 million characters. The printhead uses 9 printwires in two columns. Each wire is welded to an armature. Behind this armature is a spacer ring. Each of the 9 printwire armatures has a permanent magnet behind it. The magnets attract the armatures, pulling the printwires into the wire guide, thus keeping the wires inside the printhead. A coil is wrapped around each of the permanent magnets. When a dot is to be printed, current is passed through the appropriate coil. This creates an electromagnetic field which counters the magnetic field of the permanent magnet. The armature can then spring forward and the print wire (which is attached to the armature) strikes the ribbon and imprints a dot on the paper. When current is removed from the coil, the magnetic field of the permanent magnet attracts the armature, causing the printwire to retract into the wire guide once again. The printhead consists of the parts listed below. Wire Guide Print Wires Armature Assembly Spacer Permanent Magnet Assembly Thermistor: used to monitor the printhead temperature Printed Circuit board with Coils Head Gap Adjusting The head gap adjusting mechanism modifies the gap between the platen and printhead. This is accomplished by moving the adjusting lever on the right side of the printer mechanism. When the lever is moved, the carriage shaft rotates. Since the carriage shaft is attached to the printer mechanism through eccentric collars, turning the carriage shaft, changes the distance between the platen and the printhead.
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Chapter 2 Principles of Operation
2.2.02 Spacing Mechanism Spacing is performed when the servo motor drives the carriage along the carriage shaft, parallel to the platen. The spacing mechanism consists of the following items. DC (Servo) Motor Idle Pulley Carriage Shaft Carriage Frame Space Belt
Spacing Operation The carriage containing the printhead moves parallel to the platen along the carriage shaft. Power from the space motor is transferred via the space belt, which is attached to the bottom of the carriage. The carriage is designed to move 1.6 inches when the servo motor performs one rotation.
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Chapter 2 Principles of Operation
2.2.03 Ribbon Drive Mechanism The ribbon drive mechanism moves the ribbon in synchronization with the space motor operation. The ribbon drive mechanism consists of the items listed below. Ribbon Drive Assembly Ribbon Cartridge Ribbon Cartridge An endless ribbon with a single direction feed is used. Ink is supplied from an ink tank, which is contained in the ribbon cartridge. Ribbon Feed Operation The rotation of the space motor is transmitted to the drive gear in the ribbon cartridge through the ribbon feed gear assembly, thereby feeding the ink ribbon. The feed direction of the ribbon is maintained by switching the rotational direction of the gears in the ribbon drive assembly. This ensures unidirectional ribbon movement when bi-directional printing is used.
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Chapter 2 Principles of Operation
2.2.04 Paper Feed Mechanism Paper feeding is performed by turning the platen and the tractors, which are driven by the line feed pulse motor. The paper feed mechanism consists of the items listed below. Line Feed (Pulse) Motor with gears Idle Gear Change Spring Change Gear Platen Push Tractor Assembly Bottom Tractor Feed Unit Paper Pressure Guide Friction (Sheet) Feed When the release lever is set to the SHEET FEED position, the change gear is disengaged from the tractor gear. At the same time, the release lever applies pressure to push the pressure rollers against the platen, allowing paper to be fed. A photosensor located in the paper pressure guide detects PAPER END. Tractor (Continuous) Feed When the Release Lever is set to the TRACTOR FEED position, the release lever allows the reset spring to push the change gear toward the tractor gear. At the same time, the release lever pushes the pressure rollers away from the platen, allowing paper to be fed by the tractors. The microswitch on the push tractor (rear feed) and the paper end sensor on the sensor board (bottom feed) detect PAPER END.
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Chapter 2 Principles of Operation
2.2.05 Paper-End Detection Mechanism Friction Feed (Cut-Sheet) Paper-End When the Release Lever is in the SHEET FEED Position, the photosensor located in the Paper Pressure Guide is active. If sheet paper is installed, the paper is detected by the sensor and the sensor is turned ON. When the printer is out of sheet paper, the sensor is turned OFF indicating a paper-end condition.
Continuous (Bottom) Feed Paper-End
(Also used with Bottom Tractor Feed Unit)
When the Release Lever is in the TRACTOR FEED Position, the switch on the left Push Tractor and the Paper-End sensor on the sensor board are active. If paper is detected by either of these sensors, paper-end is inhibited. When bottom feed paper is installed, it moves the bottom paper-end lever to turn the sensor ON. When a paper out condition exists, the lever blocks the sensor, indicating a paper-end condition.
Continuous (Rear) Feed Paper-End When the Release Lever is in the TRACTOR FEED Position, the switch on the left Push Tractor and the Paper-End sensor on the sensor board are active. If paper is detected by either of these sensors, Paper-End is inhibited. When rear feed paper is installed, pressure is placed on the microswitch, located in the left push tractor. Since the switch is turned ON, paper is detected.
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Chapter 2 Principles of Operation
2.2.06 Automatic Paper Loading Automatic Paper Loading is used to consistently set the print start position when using cut-sheet or continuous sheet paper. The autoloading procedures for each type of paper follow. Cut-Sheet Paper 1. Push the paper release lever to the cut-sheet position. 2. Insert the paper from behind the platen. 3. Press the FORM FEED switch. 4. The paper bail will automatically open. 5. The line feed operation will load the paper. 6. The paper bail will automatically close.
NOTE: If the paper does not move, the Auto-Load motion becomes invalid and is treated like an ordinary paper-end condition.
Continuous Sheet (Rear Feed) SASF 1. Push the paper release lever to the continuous sheet side (front of printer). 2. Insert the paper into the push tractor. The white guide line on the left tractor MUST be visible. 3. Press the FORM FEED switch. 4. The paper bail will automatically open. 5. The line feed operation will load the paper. 6. The paper bail will automatically close.
NOTE: If the paper does not move, the auto-load motion becomes invalid and is treated like an ordinary paper-end condition.
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Chapter 2 Principles of Operation
2.2.07 Paper Park Feature Occasionally, the user will want to print on cut-sheet paper, and continuous feed paper is loaded in the printer. Rather than unloading the continuous feed paper, the operator can use the paper park feature. Paper Park retracts the continuous feed paper until a paper-end condition exists or until 14 inches of paper has been retracted. The continuous feed paper remains on the push tractor (or bottom tractor feed unit), but out of the printing path. This allows cut-sheet paper to be loaded. Once the cut-sheet printing is complete, the continuous feed paper is reloaded. CAUTION:
Do not attempt to PARK labels or more than one sheet of paper
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Chapter 3 Maintenance & Disassembly
3.1 OVERVIEW 3.1.01 General Information This section lists the parts replacement, adjustment, cleaning, lubrication, and shipping procedures. Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly on a malfunctioning unit until you have followed the failure analysis procedures in Section Four of this Service Handbook. Follow the procedures listed in Adjustments and Service Settings. Adjustments may be required when either consumables or parts are replaced. Failure to perform these procedures could result in unnecessary service calls. Cleaning procedures must be performed correctly if high print quality is to be achieved.
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Chapter 3 Maintenance & Disassembly
3.1.02 Maintenance Items The following items are required to service the unit. #1 Phillips Screwdriver (with magnetic tip, 10 inch shaft) #2 Phillips Screwdriver (with magnetic tip, 6 inch shaft) #3 Phillips Screwdriver (with magnetic tip) Straight-slot Screwdriver (1/4 inch) Needle Nose Pliers (4 inch) Diagonal Cutters Tension Gauge (capable of measuring 1 pound of pressure) 7 mm open-ended wrench Ruler (capable of measuring 1/16 inch increments) 3/32 inch socket with driver Feeler Gauge Paper Clip (used for Microswitch 2 modification) Digital Multimeter Shop Vacuum Cloth (soft and lint-free) All-Purpose Cleaner Machine Oil Graphite Based Lubricant Contact Kleen (Okidata P/N 51802301)
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Chapter 3 Maintenance & Disassembly
3.1.03 Maintenance Precautions 1. Do not disassemble the unit if it is operating normally. 2. Before starting disassembly and assembly, always power OFF the unit and detach the AC power cord. 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. Integrated circuits (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. Perform the printhead gap adjustment when any of the items listed below occur.
Print Quality is darker on one side of the document. Parts / Assemblies are replaced. Printhead (3.2.01) Platen Assembly (3.2.16) Carriage Shaft (3.2.22)
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Chapter 3 Maintenance & Disassembly
3.2 DISASSEMBLY/ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures. Only the removal procedures are explained here. Reverse the procedure for the installation. At the bottom of each procedure is a listing of the parts covered in that procedure. The Okidata part number, item description, comment (RSPL, Option, Consumable) and cross-reference to Appendix B is provided for each part. Items included in the Recommended Spare Parts List are indicated by the acronym RSPL. N/A will appear where a part number is not available. Part Item Comment Appendix B Number Description Reference 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 unit. Be sure to read all notes, cautions, and warnings, as they contain important information regarding disassembly / assembly.
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Chapter 3 Maintenance & Disassembly
3.2.01 Printhead (with Preliminary Items) WARNING: The printhead will be HOT immediately after printing. 1. Open the printer access cover (1). 2. Remove the ribbon cartridge (2). 3. Set the head gap adjusting lever (3) to the range 9 position. 4. Lift and remove the ribbon guide (4) from the two posts. 5. Remove the two printhead mounting screws (5). 6. Disconnect the printhead (6) from the connector by lifting.
NOTES: Installation Push the printhead towards the platen (in the direction of Arrow A). Perform the printhead gap adjustment. Refer to Section 3.3
P/N 50215701 Cover: Access RSPL B.2.02 P/N 50090301 Printhead: Assembly RSPL B.2.03 P/N 52105801 Ribbon Cartridge Consumable B.2.03 P/N 56609701 Cord: AC (120V) RSPL B.2.03 P/N 56624101 Cord: AC (220V) (ML) Right Angle Option B.2.03 P/N 53062601 Guide: Ribbon Assembly RSPL B.2.05 , B.2.12
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Chapter 3 Maintenance & Disassembly
3.2.02 Ribbon Protector Assembly 1. Open the printer access cover. 2. Remove the ribbon cartridge. 3. Set the head gap adjusting lever to the range 9 position. 4. Lift and remove the ribbon guide from the two posts. 5. Remove the two mounting screws (1) and detach the ribbon protector (2) by lifting. P/N 50316701 Screw: Ribbon Protector (Post) RSPL B.2.05 P/N 53062701 Protector: Ribbon Assembly RSPL B.2.05
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Chapter 3 Maintenance & Disassembly
3.2.03 Upper Cover Assembly 1. Detach the platen knob (1). 2. Pull the release lever (2) toward the front of the printer. 3. Remove the two cover mounting screws (3), located at the rear of the printer. 4. Lift the sheet separator (4). 5. Open the bail arm (5). 6. Grasp the pull-up roller assembly (6), then lift and rotate it towards the back of the printer. 7. Close the bail arm. 8. Lower the sheet separator. 9. Lift the upper cover assembly (7) at the rear of printer. Rotate the assembly towards the front of the printer, disengaging the cover from the four claws (8) at the front of the printer. CAUTION:
When installing the upper cover assembly, move the bail arm lever towards the back of the printer and move the release lever towards the front of the printer. Then, check that the paper bail moves properly.
P/N 50212431 Cover: Middle (PM3410) RSPL B.2.02 P/N 50215801 Cover: Rear (Assembly) RSPL B.2.02 P/N 50215901 Pull-Up Roller Assembly RSPL B.2.02 P/N 50215901 Pull-Up Roller Assembly RSPL B.2.03 P/N 53478601 Knob: Platen RSPL B.2.03 P/N 50910505 Spring: Cover Open RSPL B.2.04
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Chapter 3 Maintenance & Disassembly
3.2.04 Operator Panel 1. Remove the upper cover assembly (3.2.03) 2. Disconnect the operator panel cable (1) from CN10 (2) on the control board. 3. Remove the two mounting screws (3). 4. Detach the operator panel assembly by moving it upward, and then pulling toward the front of the printer, detaching the four claws. 5. Release the ten claws. 6. Detach the operator panel (4) from the operator panel holder (5). P/N 53553401 Panel: Operator (PM3410) RSPL B.2.04 P/N 55061401 PCB: OPML Operation Panel RSPL B.2.04 P/N 56628402 Cable: Op Panel (PM3410) RSPL B.2.04
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Chapter 3 Maintenance & Disassembly
3.2.05 Interface Connector Board
NOTE: To allow easier access to the mounting screw and cables, configure the interface connector board to use the serial interface connector.
1. Remove the upper cover assembly (3.2.03). 2. Disconnect connectors CN101 (1), CN102 (2), and CN103 (3). 3. Remove the two mounting screws (4) and detach the interface connector board (5) by lifting.
NOTE: After assembly, configure the interface connector board for the desired type of interface.
P/N 55061711 PCB: HKTY Interface Connector Assembly RSPL B.2.03
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Chapter 3 Maintenance & Disassembly
3.2.06 Main Logic (CBNP) Board 1. Remove the upper cover assembly. (3.2.03) 2. Remove the ribbon cartridge. 3. Release the lock of connector CN10 (1) and detach the operator panel cable (2). 4. Remove the five shield cover mounting screws (3). 5. While slightly lifting the shield cover (4), detach connectors CN11 (5) and CN12 (6) from the main logic board. 6. Remove the shield cover. 7. Detach the connectors CN1, CN2, CN3, CN5, CN6, CN7, CN8, and CN9 (7). 8. Loosen the mounting screw (8). 9. Remove the main logic board (9). CAUTION:
When assembling the printer, follow these instructions.
1. Do not allow cables to get caught under the main logic board. 2. Insert the main logic board into the groove in the base tray (10). 3. Fit the main logic board into the groove (11) in the shield cover, then secure the shield cover. P/N 55061611 PCB: CPNB Main Logic (w/o ROM) RSPL B.2.03 P/N 55934601 IC: EEPROM NM93C06N-NW RSPL B.2.03 P/N 56212601 Switch: Interlock (Assy) RSPL B.2.04
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Chapter 3 Maintenance & Disassembly
3.2.07 Printer Mechanism 1. Remove the main logic board (3.2.06). 2. Detach connectors CN102 (1) and CN103 (2) from the interface connector board (3). 3. Remove the three mounting screws (4) at the rear of the printer mechanism (5). 4. Remove the three mounting screws and brackets (6). There are two on the left side of the printer mechanism and one on the right side. CAUTION:
Do not grasp the ribbon cartridge bracket, paper chute, or the guide shaft of the sheet feeder assembly when lifting the printer during the next step.
5. Grasp the printer mechanism near the line feed motor (Position A). 6. While holding at position A, also grasp the printer mechanism (Position B). CAUTION:
DO NOT GRASP THE RIBBON CARTRIDGE BRACKET -- IT WILL BEND.
7. Lift and remove the printer mechanism.
NOTE: When assembling the printer, do not allow cables to get caught under the printer mechanism.
P/N 56614101 Cord: Power Connection (9 Pin) RSPL B.2.03 P/N 56614801 Cord: Power Connection (13 Pin) RSPL B.2.03 P/N 56614901 Cable: I/F (Internal) [I/F-Main Brd 50 Pin] RSPL B.2.03
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3.2.08 Power Supply Unit 1. Remove the printer mechanism (3.2.07). 2. Disconnect the two cables (1) from the left side of the power supply unit (2). 3. Remove the four power supply mounting screws (3). 4. To remove the power supply unit: Rotate the left side of the power supply unit towards the front of the printer. Lift the power supply unit to disengage the power switch (4), AC receptacle (5) and the tabs (6). CAUTION:
Be careful not to damage the cables with the power supply unit mounting bracket (7). This bracket is located at the left/rear of the power supply unit.
P/N 56406302 Power Supply Assembly (220/240 V) Option B.2.03 P/N 56411201 Power Supply Assembly (120 V) RSPL B.2.03
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Chapter 3 Maintenance & Disassembly
3.2.09 Printer Unit 1. Detach the DIN connector (1). 2. Lift the printer unit (2) from the bottom tractor feed unit (3).
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Chapter 3 Maintenance & Disassembly
3.2.10 BTFD PCB 1. Remove the printer unit (3.2.09). 2. Disconnect the connectors CN1 (1) and CN2 (2) on the BTFD PCB (3). 3. Remove the two mounting screws (4). 4. Remove the BTFD PCB. P/N 55066101 PCB: BTFD (BTF) RSPL B.2.08
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Chapter 3 Maintenance & Disassembly
3.2.11 Tension Spring 1. Remove the printer unit (3.2.09). 2. Raise the front door assembly (1). 3. Detach the tension spring (2) from the upper plate (3). 4. Detach the tension spring from the front door assembly. P/N 50922001 Spring: (BTF) RSPL B.2.08
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Chapter 3 Maintenance & Disassembly
3.2.12 Bottom Push Mechanism and Front Door Assembly 1. Remove the printer unit (3.2.09). 2. Remove the tension spring (3.2.11). 3. Detach connector CN1 (1) on the BTFD PCB (2). 4. Remove the four screws (3). 5. Remove the bottom push mechanism (4). 6. Remove the front door assembly (5). P/N 53063701 Door: Front (Assembly) (BTF) RSPL B.2.08
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Chapter 3 Maintenance & Disassembly
3.2.13 Drive Pulley and Belt 1. Remove the printer unit (3.2.09). 2. Remove the tension spring (3.2.11). 3. Remove the bottom push mechanism (3.2.12). 4. Loosen the two motor screws (1). 5. Push the motor (2) in the direction of Arrow A, to loosen the belt (3). 6. Remove the belt. 7. Pry open the claws in the center of the pulley, then remove the drive pulley (4) from the tractor feed drive shaft (5).
NOTES: The drive pulley has two parts. Disassembly of the drive pulley is not required during this procedure. Once the drive pulley has been removed, be sure that the tractor feed drive shaft is not removed. If you remove the tractor feed drive shaft, the left or right tractors will lose the synchronization between the pin feeds. When assembling, perform the belt tension adjustment (3.3.02).
P/N 51226901 Pulley: Drive (BTF) RSPL B.2.08 P/N 51304501 Belt: Line Feed (BTF) Mini-Pitch [120 teeth] RSPL B.2.08
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Chapter 3 Maintenance & Disassembly
3.2.14 Tractor Assembly (BTF)
NOTE: On each side frame, the tractor drive shaft passes through a plastic bushing. These bushings should remain in the frame. However, if a bushing must be removed, press the bushings claw which can be accessed from the inside of the side frame.
1. Remove the drive pulley (3.2.13). 2. Remove the tractor drive shaft (1) by sliding it to the right. 3. Rotate the tops of both the left (2) and right (3) tractor assemblies and the sheet guide (not shown) in the direction of Arrow A. 4. Lift the left side of the drive roller (4) and remove the drive roller, tractor assemblies, and sheet guide.
NOTES: The sheet guide may be removed without disassembling the drive shaft. When installing the tractor assemblies, take the following precautions:
Make sure that the tractors are synchronized by aligning the synchronization marks (5). The left tractor assembly must be positioned to the left of the metal tab.
P/N 50057401 Left Tractor Assembly RSPL B.2.08 P/N 50057501 Right Tractor Assembly RSPL B.2.08 P/N 51002201 Guide: Sheet (BTF) RSPL B.2.08 P/N 53340401 Roller: Drive (BTF) RSPL B.2.08
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3.2.15 Line Feed Motor (BTF) 1. Remove the bottom push mechanism (3.2.12). 2. Remove the two screws (1). 3. Remove the line feed motor (2).
NOTE: When installing the line feed motor, the harness should be oriented towards the top. This line feed motor is used in two different places: the bottom push unit and the printer unit.
P/N 56509401 Motor: Line Feed (BTF) RSPL B.2.08
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Chapter 3 Maintenance & Disassembly
3.2.16 Platen Assembly 1. Remove the printer mechanism (3.2.07). 2. Loosen the three 7 mm line feed motor mounting bolts (1). 3. Move the line feed motor (2) closer to the platen (3) and detach the line feed drive belt (4). 4. Remove the E-ring, washer, spring and idle gear (5). 5. Remove the screw and detach the gear pulley, washer and bushing (6). 6. Remove the screw and detach the gear and bushing (7). 7. Push in the platen lever (8), lift the bail and remove the platen.
NOTE: Perform the line feed belt tension adjustment after replacing the line feed drive belt. Refer to Section 3.3 Perform the printhead gap adjustment after installing the platen. Refer to Section 3.3
P/N 50054101 Platen: (Assembly) RSPL B.2.06 P/N 51214501 Gear: Platen "A" RSPL B.2.06 P/N 51226801 Pulley: Platen RSPL B.2.06 P/N 51304401 Belt: Mini Pitch (Line Feed) RSPL B.2.06 OLD P/N 50910305 Spring: Idle Gear
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Chapter 3 Maintenance & Disassembly
3.2.17 Paper Pressure Guide 1. Remove the platen assembly (3.2.16) 2. Remove the two paper chute springs (1) located on each side of the paper pressure guide (2). 3. Remove the screw (3), located on the left side frame of the printer mechanism, directly under the upper tractor shaft. 4. Remove the release lever detent spring (4) located on the right side frame of the printer mechanism. 5. Separate the claws and remove the release lever (5). 6. Remove the paper pressure bar (6) by sliding it to the right. 7. Using needle-nose pliers, squeeze the nylon latch (7) to release the paper out sensor wire harness (8). 8. Detach the cable from CN1 of the sensor board (9). 9. Lift the paper pressure guide and remove it. P/N 50907502 Spring: (Paper Chute) RSPL B.2.06 P/N 50910201 Spring: Detent (Release Lever) RSPL B.2.06 P/N 53478706 Lever: Release RSPL B.2.06 P/N 53478801 Block: Release Lever Guide RSPL B.2.06 P/N 56625001 Cable: Cut Sheet Sensor Assembly RSPL B.2.06
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Service Guide PM3410
Chapter 3 Maintenance & Disassembly
3.2.18 Line Feed Motor Assembly 1. Remove the printer mechanism (3.2.07) 2. Remove the three mounting bolts and washers (1), then remove the line feed motor (2).
NOTES: When installing the line feed motor, the cable should be positioned toward the top. Adjust the line feed belt tension (3.3.02) after installing the line feed motor.
This line feed motor is used in two different places: the bottom push unit and the printer unit.
P/N 56509401 Motor: Line Feed (BTF) RSPL B.2.06
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Service Guide PM3410
Chapter 3 Maintenance & Disassembly
3.2.19 Ribbon Cartridge Bracket 1. Remove the printer mechanism (3.2.07) 2. Remove the two ribbon cartridge bracket mounting screws (1). 3. Remove the ribbon cartridge bracket (2).
NOTE: When assembling, the tabs (3) on each side of the ribbon cartridge bracket must slide into the slots on the printer mechanism.
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Service Guide PM3410
Chapter 3 Maintenance & Disassembly
3.2.20 Fan Assembly 1. Remove the ribbon cartridge bracket (3.2.19). 2. Using needle-nose pliers, squeeze the nylon latch (1) to release the space motor wire harness. 3. Remove the two fan mounting screws (2). 4. Remove the fan (3). P/N 56509501 Fan: Cooling RSPL B.2.03
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Service Guide PM3410
Chapter 3 Maintenance & Disassembly
3.2.21 Head Cable Assembly 1. Detach the printhead (3.2.01) 2. Remove the ribbon cartridge bracket (3.2.19). 3. Loosen the two mounting screws (1), detach the tabs from the frame and remove the cable holder (2). The tabs must be accessed from the bottom of the printer mechanism. 4. Remove the mounting screw (3) and detach the connector clamp (4). 5. Detach the head cable connector (5) from the carriage frame (6). 6. Slide the carriage to the left side frame. While lifting the front end of the printer mechanism, remove the head cable assembly (7) by pulling downward. P/N 56624901 Cable: Head Assembly RSPL B.2.05
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Service Guide PM3410
Chapter 3 Maintenance & Disassembly
3.2.22 Carriage and Carriage Shaft 1. Remove the head cable assembly (3.2.21) 2. Loosen the slider mounting screw (1) and push it towards the back of the printer. 3. Remove the belt clamp mounting screw (2) and detach the belt clamp (3). 4. Loosen the screw (4) and detach the left printhead gap adjusting collar (5).
NOTE: The protrusions on the collar face the outside of the printer.
5. Remove the screw and detach the blue printhead gap adjusting lever (not shown). 6. Loosen the screw (6) and detach the right printhead gap adjusting collar (7). 7. Pull the two rubber carriage bumpers (8) from the carriage shaft (9). 8. Slide the carriage shaft to the right and remove the shaft and the carriage assembly (10).
NOTES: Installation Be sure that the larger extension at the end of the carriage shaft is positioned to the right. Perform the printhead gap adjustment after installing this assembly. Refer to Section 3.3
P/N 53340501 Carriage: (Assembly) RSPL B.2.05 P/N 50706701 Collar: Eccentric (with Screw) RSPL B.2.06 P/N 51112101 Shaft: Carriage RSPL B.2.06 P/N 53063801 Bracket: Printhead Gap Indicator RSPL B.2.06 P/N 53478401 Lever: Adjust RSPL B.2.06
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Service Guide PM3410
Chapter 3 Maintenance & Disa