Oki Microline 520 How to use

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Microline 520/521
Service Handbook
P/N 59257803

Microline 520/521
Service Handbook

This document may not be reproduced without the written permission of the Okidata Technical Training
Group. Every effort has been made to ensure the accuracy of the information contained in this training
course. Okidata is not responsible for errors beyond its control.
©1994 by Okidata All rights reserved.
First Edition February, 1993 P/N 59257801
Second Edition September, 1993 P/N 59257802
Third Edition December, 1994 P/N 59257803
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: [phone], 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 registered trademark of Oki Electric Industry Company, Ltd.; marque depose de Oki
Electric Industry Company, Ltd.
OkiSmart Paper Handling is a trademark of Oki Electric Industry Company, Inc.
PLUG ’n PRINT is a registered trademark of Oki America, Inc.; marque deposee de Oki America, Inc.
Bitstream is a registered trademark of Bitstream Incorporated.
Epson is a registered trademark of Seiko Epson Corporation.
IBM is a registered trademark of International Business Machine Corporation.
MS-DOS is a registered trademark of Microsoft Corporation.
PC is a registered trademark of International Business Machine Corporation.
Proprinter is a registered trademark of International Business Machine Corporation.
Windows is a trademark of Microsoft Corporation

Table of Contents
COURSE ADMINISTRATION:
OVERVIEW.................................................................................................................................i-1
RECOMMENDATIONS..............................................................................................................i-2
INFORMATION UPDATES........................................................................................................i-3
NOTICES......................................................................................................................................i-3
WHERE TO SEND TESTING MATERIALS.............................................................................i-4
MISSING ITEMS OR MISSING PAGES....................................................................................i-5
COURSE PATH ...........................................................................................................................i-6
SERVICE TRAINING..................................................................................................................i-7
SERVICE AUTHORIZATION..................................................................................................i-11
General Information........................................................................................................i-11
Answer Sheet: Microline 520/521 .................................................................................i-13
Course Critique: Microline 520/521..............................................................................i-14
Certification Test: Microline 520/521............................................................................i-16
SECTION ONE: SPECIFICATIONS
1.1 OVERVIEW....................................................................................................................1-1
1.1.01 General Information..........................................................................................1-1
1.2 PHYSICAL SPECIFICATIONS ..................................................................................... 1-2
1.2.01 Dimensions .......................................................................................................1-2
1.2.02 Printer Weight...................................................................................................1-2
1.3 POWER REQUIREMENTS............................................................................................1-3
1.3.01 Input Power.......................................................................................................1-3
1.3.02 Power Consumption..........................................................................................1-3
1.3.03 Power Frequency ..............................................................................................1-3
1.4 ENVIRONMENTAL CONDITIONS..............................................................................1-4
1.4.01 Acoustic Rating.................................................................................................1-4
1.4.01 Altitude .............................................................................................................1-4
1.4.03 Ambient Temperature and Relative Humidity (RH)........................................1-4
i

1.5 AGENCY APPROVALS.................................................................................................1-5
1.5.01 Listings..............................................................................................................1-5
1.6 OPERATIONAL SPECIFICATIONS.............................................................................1-6
1.6.01 Character Matrix Sizes......................................................................................1-6
Table of Print Speed and Character Matrix ...............................................................1-6
1.6.02 Characters Per Line...........................................................................................1-6
Microline 520.............................................................................................................1-6
Microline 521.............................................................................................................1-6
1.6.03 Character Pitches ..............................................................................................1-6
1.6.04 Character Sets ...................................................................................................1-7
1.6.05 Emulations ........................................................................................................1-7
1.6.06 Fonts..................................................................................................................1-8
Near Letter Quality ....................................................................................................1-8
Utility.........................................................................................................................1-8
High Speed Draft .......................................................................................................1-8
Bar Code ....................................................................................................................1-8
1.6.07 Front Panel Switches.........................................................................................1-8
1.6.08 Graphics Resolution..........................................................................................1-8
1.6.09 Interface ............................................................................................................ 1-8
Standard .....................................................................................................................1-8
Optional......................................................................................................................1-8
1.6.10 Line Feed Increments........................................................................................1-9
Fixed ..........................................................................................................................1-9
Variable......................................................................................................................1-9
1.6.11 Line Feed Time.................................................................................................1-9
1.6.12 Menu Mode.......................................................................................................1-9
1.6.13 Paper Feed Methods........................................................................................1-10
Standard ...................................................................................................................1-10
Optional....................................................................................................................1-10
1.6.14 Paper Feed Paths.............................................................................................1-10
1.6.15 Paper Loading.................................................................................................1-10
1.6.16 Paper Out Detection........................................................................................1-10
1.6.17 Paper Tear Capabilities...................................................................................1-10
1.6.18 Print Method ...................................................................................................1-11
Printhead Type.........................................................................................................1-11
General Information...........................................................................................1-11
Overheat Protection ...........................................................................................1-11
Printhead Gap Information.......................................................................................1-12
1.6.19 Print Modes..................................................................................................... 1-14
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1.6.20 Print Speed......................................................................................................1-14
Table of Print Speed and Character Matrix .............................................................1-14
1.7 PAPER SPECIFICATIONS ..........................................................................................1-15
1.7.01 Types...............................................................................................................1-15
Card Stock................................................................................................................1-15
Continuous Form .....................................................................................................1-15
Cut Sheet..................................................................................................................1-16
Envelopes................................................................................................................. 1-16
Labels.......................................................................................................................1-17
Transparency............................................................................................................1-17
1.7.02 Length.............................................................................................................1-18
1.7.03 Number of Copies...........................................................................................1-18
1.7.04 Thickness ........................................................................................................ 1-18
1.7.05 Weight............................................................................................................. 1-19
1.7.06 Width...............................................................................................................1-19
Paper ........................................................................................................................1-19
Printing Area............................................................................................................1-19
1.8 MEMORY SPECIFICATIONS.....................................................................................1-20
1.8.01 EEPROM ........................................................................................................1-20
1.8.02 EPROM...........................................................................................................1-20
1.8.03 RAM ............................................................................................................... 1-20
1.9 CONSUMABLES.......................................................................................................... 1-21
1.9.01 Ribbon.............................................................................................................1-21
1.10 OPTIONS.......................................................................................................................1-22
1.10.01 Cut Sheet Feeders ...........................................................................................1-22
Single Bin.................................................................................................................1-22
Dual Bin...................................................................................................................1-22
1.10.02 Pull Tractor Kit ..............................................................................................1-23
1.10.04 Bottom Push Tractor Kit ................................................................................1-23
1.10.05 Serial Interface................................................................................................1-23
1.10.06 Roll Paper Stand .............................................................................................1-24
1.10.08 OKISmart Typer Utility..................................................................................1-24
1.10.09 OKISmart Panel Utility...................................................................................1-24
1.11 RELIABILITY...............................................................................................................1-25
1.11.01 Mean Time Before Failure (MTBF)...............................................................1-25
1.11.02 Mean Time To Repair (MTTR)......................................................................1-25
1.11.03 Printer Life...................................................................................................... 1-25
1.11.04 Printhead Life..................................................................................................1-25
1.11.05 Ribbon Life ....................................................................................................1-25
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1.11.06 Warranty (Limited).........................................................................................1-25
1.11.07 Service.............................................................................................................1-25
SECTION TWO: PRINCIPLES OF OPERATION
2.1 ELECTRICAL OPERATION.......................................................................................... 2-1
2.1.01 Main Control Board..........................................................................................2-2
Block Diagram...........................................................................................................2-3
Program ROM............................................................................................................2-4
RAM ..........................................................................................................................2-4
LSI..............................................................................................................................2-5
Electrically Erasable Programmable Read Only Memory (EEPROM).....................2-5
2.1.02 Initialization......................................................................................................2-6
2.1.03 Parallel Interface Control..................................................................................2-7
2.1.04 Print Control......................................................................................................2-8
LSI/Printhead Interface..............................................................................................2-8
Gap Adjust Control....................................................................................................2-9
Print Compensation Control.......................................................................................2-9
2.1.05 Space and Line Feed (SP/LF) Motor Control.................................................2-10
Line Feed Motor Control.........................................................................................2-10
Space Motor Control................................................................................................2-11
Encoder Disk............................................................................................................2-11
2.1.06 Operation Panel...............................................................................................2-12
2.1.07 Alarm Circuit ..................................................................................................2-14
Driver Circuit Alarm Processing..............................................................................2-14
Low Motor Drive Voltage Alarm ............................................................................ 2-14
Head Drive Time......................................................................................................2-15
Print Speed...............................................................................................................2-15
Head Overheat Alarm Processing............................................................................2-15
2.1.08 Power Supply Circuit......................................................................................2-16
Table of Output Voltages.........................................................................................2-16
2.2 MECHANICAL OPERATION .....................................................................................2-17
2.2.01 Printhead Mechanism......................................................................................2-17
Printhead Gap Information.......................................................................................2-18
Interconnect Diagram: Control Board to Printhead................................................2-20
Line Feed Motor Resistance .............................................................................. 2-21
Space Motor Resistance.....................................................................................2-21
Printhead Operation .................................................................................................2-22
Printhead Temperature.............................................................................................2-22
2.2.02 Spacing Mechanism........................................................................................ 2-24
Spacing Operation....................................................................................................2-24
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2.2.03 Head Gap Mechanism.....................................................................................2-26
Head Gap Setting Operation....................................................................................2-26
2.2.04 Ribbon Drive Mechanism...............................................................................2-29
Ribbon Drive Operation...........................................................................................2-29
2.2.05 Line Feed Mechanism.....................................................................................2-30
Change Lever (Paper Path Selection Lever)............................................................2-30
Paper Clamp Mechanism.........................................................................................2-30
Cut Sheet/Continuous Sheet Switching Mechanism................................................2-31
Top Feed (for cut sheet paper)...........................................................................2-31
Rear/Bottom Feed (for continuous feed paper)..................................................2-31
Cut Sheet Paper Feed Operation..............................................................................2-32
Continuous Paper Feed (Rear Tractor Mechanism).................................................2-32
Continuous Paper Feed (Pull Tractor Mechanism) .................................................2-32
Continuous Paper Feed (Bottom Tractor Feed Mechanism) ..................................2-33
Continuous Paper Feed (Push/Pull Tractor Mechanism).........................................2-33
2.2.06 Paper Detection Mechanism ..........................................................................2-34
Top Feed Paper Detection........................................................................................2-34
Rear Feed Detection.................................................................................................2-34
Bottom Feed Detection ............................................................................................2-34
2.2.07 Support Protector Mechanism.........................................................................2-35
2.2.08 Automatic Paper Load ....................................................................................2-36
Cut Sheet Paper........................................................................................................2-36
Continuous Feed Paper............................................................................................2-37
2.2.09 Paper Park ......................................................................................................2-38
Paper Park Operation...............................................................................................2-38
SECTION THREE: MAINTENANCE
3.1 OVERVIEW....................................................................................................................3-1
3.1.01 General Information..........................................................................................3-1
3.1.02 Maintenance Tools............................................................................................3-1
3.1.03 Maintenance Precautions..................................................................................3-2
3.2 DISASSEMBLY/ASSEMBLY PROCEDURES ............................................................ 3-3
General Information...................................................................................................3-3
3.2.01 Preliminary Items..............................................................................................3-4
3.2.02 Printhead Assembly..........................................................................................3-6
3.2.03 Ribbon Protector...............................................................................................3-8
3.2.04 Gear Case Assembly.......................................................................................3-10
3.2.05 Pull-up Roller Assembly.................................................................................3-12
3.2.06 Upper Cover, Access Cover, and Sheet Guide Assemblies............................3-14
3.2.07 Control Board (FJIM) .....................................................................................3-16
v

3.2.08 Power Supply Assembly.................................................................................3-18
3.2.09 Operator Panel PCB (LEOP) ..........................................................................3-20
3.2.10 PC Connector..................................................................................................3-22
3.2.11 Space Motor and Roller Guide Assemblies....................................................3-24
3.2.12 Carriage Cable ................................................................................................3-26
3.2.13 Space Rack...................................................................................................... 3-28
3.2.14 Roller/Holder Backup Assembly....................................................................3-30
3.2.15 Guide Rail and Adjust Cam............................................................................3-32
3.2.16 Left Ground Plate............................................................................................3-34
3.2.17 Right Ground Plate .........................................................................................3-36
3.2.18 Rear and Cut Sheet Paper Feed Sensor Levers...............................................3-38
3.2.19 Platen Assembly..............................................................................................3-40
3.2.20 Paper Chute Assembly....................................................................................3-42
3.2.21 Line Feed Motor Assembly ............................................................................3-44
3.2.22 Reset Spring....................................................................................................3-46
3.2.23 Idle Gear and Change Lever...........................................................................3-48
3.2.24 Pressure Spring ...............................................................................................3-50
3.2.25 Carriage Shaft .................................................................................................3-52
3.2.26 Leaf Spring...................................................................................................... 3-54
3.2.27 Bottom Paper Sensor Levers........................................................................... 3-56
3.2.28 Front Pressure Roller Assembly .....................................................................3-58
3.2.29 Tractor Assembly............................................................................................3-60
3.2.30 Main Frame.....................................................................................................3-62
3.3 PRINTER ADJUSTMENTS .........................................................................................3-65
3.3.01 General Information........................................................................................3-65
3.3.02 Printhead Gap Adjustment..............................................................................3-66
General Information.................................................................................................3-66
Procedure .................................................................................................................3-68
Setup Phase........................................................................................................3-68
Printhead Gap Modification Phase ....................................................................3-68
Parallel Adjustment Phase ................................................................................. 3-68
Verification Phase..............................................................................................3-68
3.3.03 Key Combinations ..........................................................................................3-70
3.3.04 Menu Operation..............................................................................................3-71
General Information.................................................................................................3-71
Menu Mode..............................................................................................................3-71
Printing the Menu .................................................................................................... 3-72
Sample Menu........................................................................................................... 3-73
Reset Menu to Factory Defaults ..............................................................................3-75
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Limited Operation....................................................................................................3-76
General Information...........................................................................................3-76
Procedure ...........................................................................................................3-77
Menu Settings ..........................................................................................................3-78
Menu Settings ..........................................................................................................3-78
3.3.05 Top of Form....................................................................................................3-82
General Information.................................................................................................3-82
Setting Top of Form.................................................................................................3-82
Reset the Top of Form to Factory Default...............................................................3-82
3.3.06 Paper Park.......................................................................................................3-83
General Information.................................................................................................3-83
Procedure: Continuous Feed to Single Sheet..........................................................3-83
Procedure: Single Sheet to Continuous Feed..........................................................3-83
3.3.07 Tear Feature....................................................................................................3-84
General Information.................................................................................................3-84
3.3.08 Forms Tear Off ...............................................................................................3-85
General Information.................................................................................................3-85
Vertical Line Spacing Problems ..............................................................................3-86
Setting...................................................................................................................... 3-87
Using........................................................................................................................3-87
Checking Top of Form with Form Tear Off Activated............................................3-87
3.3.09 Resets.............................................................................................................. 3-88
Reset Menu to Factory Defaults ..............................................................................3-88
Reset the Top of Form to Factory Default...............................................................3-88
3.4 CLEANING...................................................................................................................3-89
3.4.01 General Information........................................................................................3-89
3.4.02 Cleaning Schedule ..........................................................................................3-89
3.4.03 Cleaning Tools................................................................................................3-89
3.4.04 Areas to be Cleaned........................................................................................3-89
3.5 LUBRICATION ............................................................................................................3-90
3.5.01 General Information........................................................................................3-90
3.5.02 Lubrication Schedule......................................................................................3-90
3.5.03 Lubrication Types...........................................................................................3-90
3.5.04 Lubrication Amounts ...................................................................................... 3-90
3.5.05 Lubrication Table............................................................................................3-91
3.5.06 Areas Not Lubricated......................................................................................3-91
3.6 SHIPPING INSTRUCTIONS........................................................................................3-92
3.6.01 Return for Service...........................................................................................3-92
3.6.02 All Other Returns............................................................................................3-93
vii

SECTION FOUR: FAILURE ANALYSIS
4.1 OVERVIEW....................................................................................................................4-1
4.1.01 Introduction.......................................................................................................4-1
4.1.02 Printer Serial Number Identification.................................................................4-3
4.1.03 Firmware Revision Identification .....................................................................4-3
Header........................................................................................................................4-3
4.2 REPORTING PROBLEMS.............................................................................................4-4
4.2.01 General Information..........................................................................................4-4
4.2.02 Problem Lists ....................................................................................................4-4
4.2.03 Reporting Methods............................................................................................4-5
Okilink II....................................................................................................................4-5
Course Critique..........................................................................................................4-5
Fax Number ...............................................................................................................4-5
Mailing Address.........................................................................................................4-5
Information Provided.................................................................................................4-5
4.3 TROUBLESHOOTING UPDATES................................................................................4-6
4.3.01 General Information..........................................................................................4-6
4.3.02 Okilink II...........................................................................................................4-6
4.3.03 Faxable Facts ....................................................................................................4-6
4.3.04 Technical Service Bulletins ..............................................................................4-6
4.4 TROUBLESHOOTING TIPS.......................................................................................... 4-7
4.4.01 Preliminary Checks...........................................................................................4-7
4.4.02 Problem Categories...........................................................................................4-8
ALARM Lamp Blinks (Fatal Errors).........................................................................4-8
Operational Errors......................................................................................................4-8
ALARM Lamp Lights (Paper End/Jam Conditions) .................................................4-8
4.4.03 START HERE Flowchart.................................................................................4-9
4.4.04 Tips for Preventing Image Problems ..............................................................4-10
4.4.05 Common Problems..........................................................................................4-11
4.5 ABNORMAL OUTPUT................................................................................................4-14
4.5.01 Output Samples...............................................................................................4-14
Light Print on the Entire Page............................................................................4-15
Uneven Print Density.........................................................................................4-15
Smeared Print.....................................................................................................4-15
Inconsistent Line Feed.......................................................................................4-15
Drifting Margin..................................................................................................4-15
Left Margin Drifting Problem............................................................................4-17
viii

4.6 FAULT ALARMS......................................................................................................... 4-18
4.6.01 General Information........................................................................................4-18
4.6.02 ALARM/LED Display Troubleshooting Table Index....................................4-19
4.6.03 ALARM/LED Display Troubleshooting Tables.............................................4-20
4.7 REPAIR ANALYSIS PROCEDURES (RAPs).............................................................4-22
4.7.01 Using the RAPs...............................................................................................4-22
4.7.02 RAP Index.......................................................................................................4-23
RAP 01 No Power Supplied to Printer.....................................................................4-24
RAP 02 No Spacing Operation................................................................................4-26
RAP 03 Printhead Homing Error.............................................................................4-28
RAP 04 Paper Jam During Paper Loading ..............................................................4-30
RAP 05 Printhead Pins Not Firing...........................................................................4-31
RAP 06 Poor Print Quality.......................................................................................4-32
RAP 07 Ribbon Feed Problem.................................................................................4-33
RAP 08 Line Feed Problem.....................................................................................4-34
RAP 09 Operation Panel Malfunction.....................................................................4-37
RAP 10 Parallel Interface Problem..........................................................................4-38
RAP 11 Serial Interface Problem.............................................................................4-40
4.8 PRINTER TESTS..........................................................................................................4-43
4.8.01 General Information........................................................................................4-43
4.8.02 Rolling ASCII Test .........................................................................................4-44
General Information.................................................................................................4-44
Procedure .................................................................................................................4-44
Sample......................................................................................................................4-45
4.8.03 Font Test .........................................................................................................4-46
General Information.................................................................................................4-46
Procedure .................................................................................................................4-46
Sample......................................................................................................................4-47
4.8.04 Serial Interface Loopback Test.......................................................................4-48
Loopback Connector Configuration ........................................................................4-49
Serial Cable Information..........................................................................................4-50
Serial Interface Signal Requirements.......................................................................4-50
Commonly Used Serial Cable Configurations.........................................................4-51
IBM 25-Pin Cable Configuration.......................................................................4-51
IBM 9-Pin Cable Configuration.........................................................................4-51
ix

4.8.05 Hexadecimal Dump Mode..............................................................................4-52
General Information.................................................................................................4-52
Example ...................................................................................................................4-52
Procedure .................................................................................................................4-52
Sample......................................................................................................................4-53
4.9 RESISTANCE CHECKS...............................................................................................4-54
4.9.01 General Description........................................................................................4-54
Layout Diagram.......................................................................................................4-55
4.9.02 Printhead.........................................................................................................4-56
Interconnect Diagram: Control Board to Printhead................................................ 4-56
4.9.03 Line Feed Motor Resistance ........................................................................... 4-57
4.9.04 Space Motor Resistance..................................................................................4-57
APPENDIX A: BOARD DIAGRAMS
A.1 OVERVIEW................................................................................................................... A-1
A.1.01 General Information......................................................................................... A-1
A.2 INDEX TO CHARTS..................................................................................................... A-2
A.2.01 Main Controller Board (FJIM)......................................................................... A-4
A.2.02 Operator Panel Board (LEOP)......................................................................... A-6
A.2.03 Power Supply Assembly.................................................................................. A-8
A.2.04 Space Motor Board........................................................................................ A-10
A.2.05 RS232-C Serial Interface Board - Option (LXHI)........................................ A-12
APPENDIX B: ILLUSTRATED PARTS LISTING
B.1 OVERVIEW....................................................................................................................B-1
B.1.01 General Information..........................................................................................B-1
Format........................................................................................................................B-2
Current Part Numbers ................................................................................................B-3
B.1.02 Definition of Terms...........................................................................................B-4
Assemblies.................................................................................................................B-4
Blank..........................................................................................................................B-4
Consumable................................................................................................................B-4
Document...................................................................................................................B-4
Drivers........................................................................................................................B-4
Firmware....................................................................................................................B-4
Option ........................................................................................................................B-4
Option RSPL..............................................................................................................B-4
RSPL..........................................................................................................................B-4
Technical Service Bulletins .......................................................................................B-5
x

520..............................................................................................................................B-5
521..............................................................................................................................B-5
Both............................................................................................................................B-5
B.1.03 Parts Ordering Information...............................................................................B-6
Service Center Reference Guide................................................................................B-6
Placing a Parts Order .................................................................................................B-7
B.2 CHARTS..........................................................................................................................B-8
B.2.01 Printer..............................................................................................................B-10
B.2.02 Upper Cover Assembly...................................................................................B-12
B.2.03 Printer General Assembly...............................................................................B-14
B.2.04 Printer Unit......................................................................................................B-16
B.2.05 Printer Unit......................................................................................................B-18
B.2.06 Printer Unit......................................................................................................B-20
B.2.07 Carriage Assembly..........................................................................................B-22
B.2.08 Options............................................................................................................B-24
B.2.09 Option Parts ....................................................................................................B-26
B.2.10 Consumables...................................................................................................B-28
B.2.11 Packing Materials............................................................................................B-30
B.2.12 Documentation................................................................................................B-32
B.2.13 Service Training Kit Revision List .................................................................B-34
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xii

COURSE ADMINISTRATION

OVERVIEW
Okidata developed this course in order to provide the information necessary to install and
maintain the Microline 520 and Microline 521 printers. Upon successful completion of this
training course, you will be able to do the following.
Install and operate the product
Locate the major assemblies of the product
Identify fault indications
Perform corrective and preventive maintenance
The Service Handbook is the primary reference manual for this course. You cannot, however,
successfully complete this course by referring only to this manual. Take the time to familiarize
yourself with all of the documentation in the training kit. This additional information will
greatly simplify working with the product.
Okidata’s Technical Training Program is designed to build a knowledgeable and efficient
service and support group for Okidata products.
One step in becoming an Authorized Okidata Service Center is obtaining a training kit for the
appropriate product. This acquisition allows the Dealership to have reference materials
available during service jobs. Having, and using, these reference materials will minimize the
time and money spent on repairs.
Technicians complete Certification Tests as part of Okidata’s Authorization process. Testing
familiarizes the technician with the product and reference materials.
This training course provides assembly level repair information to the field technician. No
attempt is made to provide basic training in being a technician. This kit strives to train a
technician to service the product. Okidata views service technicians as representatives of
Okidata. Through this course, Okidata seeks to provide the means and the motivation that will
make good service a reality.
Remember
Component level servicing is provided only at Okidata Service Repair Depots!
Microline 520/521 Service Handbook i - 1 Course Administration
P/N 59257803

RECOMMENDATIONS
Prerequisites
Before beginning this course, you should know the following concepts.
Have an understanding of basic electronics
Be familiar with electrostatic principles
Be familiar with dot matrix technology and protocol
Be familiar with the proper procedures for handling circuit boards, Read Only
Memory (ROM), and Random Access Memory (RAM)
Be able to use basic tools
Be able to use a digital multimeter (DMM)
Equipment
The following equipment is recommended for the successful completion of this training course.
Microline 520 or Microline 521 (optional)
Tools (optional - refer to Module Three of the Service Handbook)
Personal Computer (for Okilink II connection)
Modem (for Okilink II connection)
Communications Software (for Okilink II connection)
Telephone (for Faxable Facts connection)
Facsimile Machine (for Faxable Facts connection)
Video Cassette Player (for viewing videotape)
Video Monitor (for viewing videotape)
Documentation
You should have access to the following documentation while completing this course.
Okidata Service Center Reference Guide
Service Handbook
Printer Handbook
Service Videotape
Course Administration i - 2 Microline 520/521 Service Handbook
P/N 59257803