Oki ML521 - Manual

Oki ML521

Oki ML521 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – Front Cover; Product Specifications; Electrical Operation
  • Page 3 – Mechanical Operation - Printhead Mechanism; Maintenance & Disassembly
  • Page 4 – Printer Adjustments; Failure & Repair Analysis; Reporting Problems - General Information
  • Page 5 – Resistance Checks; A Reference Charts
  • Page 7 – Chapter 0 About This Manual
  • Page 8 – Windows is a trademark of Microsoft Corporation
  • Page 9 – Chapter 1 Product Specifications; typewriter on checks, labels and envelopes.
  • Page 12 – Near Letter Quality Mode
  • Page 16 – Optional
  • Page 21 – Paper Feed Path: Bottom; Paper Feed Path: Rear or Bottom; Refer to the Printhead Gap Information, Section 1.6
  • Page 24 – Microline 520 8 inches Maximum
  • Page 26 – Material
  • Page 29 – Bottom Feed
  • Page 31 – Can be configured through the Menu or OKISmart Utility Program
  • Page 33 – Obtained via BRC (Business Reply Card) packaged with printer; OKISmart Panel Emulator
  • Page 34 – Approximately 15 minutes to major sub-assembly level
  • Page 35 – Chapter 2 Principles of Operation
  • Page 36 – The MPU contains a 20 bit address bus, a 16 bit data bus.
  • Page 40 – Controls the external interface. The LSI is connected to the MPU.
  • Page 42 – The steps in Printer Initialization are listed below.; A reset operation initiated by I-PRIME does not reset the MPU.
  • Page 57 – Print Speed
  • Page 59 – IC logic levels, LED drive voltages
  • Page 64 – The resistance of each coil should be approximately 13 ohms.
  • Page 65 – The resistance of each coil should be approximately 5 ohms.
  • Page 71 – The head gap is modified in .06 mm units for each range setting.
  • Page 75 – The components of the paper feed mechanism are listed below.; Change Lever (Paper Path Selection Lever)
  • Page 77 – As the platen turns, the platen gear causes the idle gear to rotate.
  • Page 81 – Bottom feed of continuous sheets is possible; only; when an optional pull tractor unit is installed.
  • Page 87 – Set the change lever to the TOP FEED position.; Wait Time; setting
  • Page 88 – Place continuous feed paper in the appropriate tractor.
  • Page 89 – Place the change lever in the REAR FEED or BOTTOM FEED position.
  • Page 90 – Chapter 3 Maintenance & Disassembly; Follow the procedures listed in; Adjustments and Service Settings; . Adjustments may be required when
  • Page 93 – 20 indicates that the item is specific to the Microline 520.; the disassembly procedures for RSPL
  • Page 96 – Pull the printhead straight up to remove it.; Refer to Section 3.3 of
  • Page 99 – Lift and remove the gear case assembly.; When lubricating, refer to Section 3.5 of this Service Handbook.
  • Page 101 – Raise the front side of the upper cover assembly.; When cleaning, refer to Section 3.4 of this Service Handbook.
  • Page 103 – Tilt the board to access the connectors.; Installation; The bottom sensor lever must be positioned in the SNS3 sensor (8).
  • Page 105 – Lift and remove the transformer assembly.
  • Page 107 – Cut the nylon tie and release the cable.
  • Page 108 – Perform these procedures
  • Page 113 – Pull the space rack straight up and remove it.
  • Page 116 – press too hard or the claw will break.
  • Page 119 – You may have to use a screwdriver to work the plate tabs free.; The plate must be securely seated under the claws.
  • Page 121 – Lubrication
  • Page 132 – Pull the carriage shaft free of the base frame.; Cleaning; of this Service; of this Service Handbook.
  • Page 136 – claw, push on the claw to move the paper pan away from the main frame.
  • Page 145 – should be performed when the following parts are replaced.; Procedure
  • Page 146 – DO NOT DISENGAGE THE ADJUST GEAR!; Printhead Gap Modification Phase
  • Page 155 – The tables show; all; possible menu settings available with the Microline 520/521.
  • Page 156 – switch. This will advance the paper in micro increments.; Reset the Top of Form to Factory Default; The factory default Top of Form Setting is 1 inch.
  • Page 157 – Remove any printed pages from the printer.; Procedure: Single Sheet to Continuous Feed; Remove any single sheet pages from the printer.
  • Page 158 – To activate the Tear Feature, press TEAR.
  • Page 159 – DO NOT use Forms Tear Off with labels or multi-part forms.; Vertical Line Spacing Problems; Use the Micro Feed buttons to set the Top of Form.
  • Page 161 – Printing the Menu provides a reference of customized settings.
  • Page 163 – Routine inspection and lubricating should be performed:
  • Page 164 – CAUTION; Teeth of the gears in the Gear Case Assembly
  • Page 165 – Locate the original packaging or
  • Page 166 – Chapter 4 Failure & Repair Analysis; When troubleshooting a defective unit, follow these steps.
  • Page 167 – Example
  • Page 168 – At the top of the test is a header.
  • Page 170 – Your cooperation is greatly appreciated. Thank you for your help!
  • Page 172 – Okilink II
  • Page 173 – Has the ribbon been replaced as recommended?
  • Page 176 – Make sure that the paper you are using is within specifications.; Paper specifications can be found in
  • Page 177 – Nothing happens when the unit is powered on.
  • Page 178 – Always power OFF the printer before you turn the platen knob.
  • Page 181 – the cause of the binding.
  • Page 182 – Drifting Margin; Refer to the next section and / or Technical Service Bulletin 3309.
  • Page 183 – MUST BE
  • Page 184 – Follow these guidelines when using the Troubleshooting Tables.
  • Page 187 – Space Motor Alarm
  • Page 189 – When using the Repair Analysis Procedures, follow these steps.
  • Page 207 – (Refer to Appendix A of this Service
  • Page 211 – Utility 10 cpi; Follow these steps to print the font test.
  • Page 215 – The printer has the following cable requirements.
  • Page 220 – Layout Diagram
  • Page 226 – Chapter A Reference Charts
  • Page 227 – NONE; SNS2: Bottom Feed Paper Out Sensor
  • Page 229 – SHIFT
  • Page 231 – Transformer secondary voltages
  • Page 233 – Photosensor: used to monitor space motor movement.
  • Page 235 – Masked to the MPU: Socket is empty
  • Page 237 – Chapter B Illustrated Parts Listing; Locate the part and its part number in this section.
  • Page 238 – N/A will appear where a part number is not available.
  • Page 241 – Both
  • Page 243 – Below is an index to the illustrated parts breakdown charts.; Section Description
  • Page 245 – Item; Description
  • Page 248 – RSPL Both
  • Page 261 – Option RSPL Both
  • Page 265 – Document Both
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Service Guide ML520/521

Chapter 0 About This Manual

ML520 // ML521

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09/17/97

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Summary

Page 2 - Front Cover; Product Specifications; Electrical Operation

Table of Contents Page Service Guide ML520/521 0 About This Manual Front Cover 1 Copyright Information 2 1 Product Specifications 1.1.01 General Information 3 ....1.2 Physical Specifications 4 ....1.3 Power Requirements 5 ....1.4 Environmental Conditions 6 ....1.5 Agency Approvals 7 ....1.6 Operatio...

Page 3 - Mechanical Operation - Printhead Mechanism; Maintenance & Disassembly

Table of Contents Page ........Head Drive Time 39 ........Print Speed 40 ........%Head Overheat Alarm Processing 41 ....2.1.08 Power Supply Circuit 42 2.2 Mechanical Operation - Printhead Mechanism 43 ........Printhead Gap Information 44 ........Interconnect Diagram: Control Board to Printhead 45 .....

Page 4 - Printer Adjustments; Failure & Repair Analysis; Reporting Problems - General Information

Table of Contents Page ....3.2.11 Space Motor and Roller Guide Assemblies 80 ....3.2.12 Carriage Cable 81 ....3.2.13 Space Rack 82 ....3.2.14 Roller/Holder Backup Assembly 83 ....3.2.15 Guide Rail and Adjust Cam 84 ....3.2.16 Left Ground Plate 85 ....3.2.17 Right Ground Plate 86 ....3.2.18 Rear and ...

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