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Oki ML620 - User Manual

Oki ML620
100 pages
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User's Guide
59320101 my.okidata.com
RT322
ML620/ML621

Table of Contents

Other manuals for Oki ML620

Questions and Answers

  • J
    Jacqueline RasmussenAug 31, 2025
    What to do if the printout from my Oki Printer contains completely different characters or symbols?
    • J
      Jason PattersonAug 31, 2025
      If the printout contains completely different characters or symbols, the print setup for the user’s application may be incorrect. Reselect print setup for the applications according to priority.
  • J
    Jason SanchezAug 30, 2025
    What should I do if the print carriage does not operate on my Oki Printer?
    • T
      thomascarsonAug 30, 2025
      If the print carriage on your Oki Printer does not operate, there may be contamination on the carriage shaft. Clean any paper dust and contamination from the carriage with a dry cloth.
  • M
    Manuel GilmoreAug 29, 2025
    What causes pale characters on prints from my Oki ML620?
    • S
      Susan SandersAug 29, 2025
      If the characters are too pale on your Oki Printer printouts, the Paper Thickness lever position may not match the paper. Correct the Paper Thickness lever setting.
  • M
    Michelle BenitezAug 28, 2025
    Why is the horizontal printing position offset on my Oki Printer?
    • R
      Rachel SheltonAug 28, 2025
      The horizontal printing position may be offset on your Oki Printer because the start position can change after the printer is powered on. When the printer is powered ON, switch from off-line mode to on-line mode by pressing the SEL key to reset the start position. Remember to set the Power Switch to OFF before you change the start position.
  • D
    danacookAug 27, 2025
    What to do if the SEL indicator is illuminated but no printing takes place on my Oki ML620 Printer?
    • T
      Tony AcostaAug 27, 2025
      If the SEL indicator is lit but your Oki Printer isn't printing, it could be due to: * A disconnected interface cable. Reconnect it. * Using the wrong interface cable. Ensure you are using the correct one.
  • R
    Ryan BoyleAug 26, 2025
    Why is my Oki Printer printing slowly?
    • Z
      zimmermanrachelAug 27, 2025
      Your Oki Printer might be printing slowly because the printhead is overheating. When this happens, the printer automatically starts unidirectional split printing. The printer will return to its original operation when the printhead temperature drops sufficiently.
  • A
    Anthony HodgesAug 25, 2025
    What to do if the printhead is moving but no printing takes place on my Oki ML620 Printer?
    • B
      berrywilliamAug 26, 2025
      If the printhead on your Oki Printer is moving but no printing occurs, the ribbon cartridge may not be installed. Install the ribbon cartridge.
  • M
    moorelaurenAug 25, 2025
    What to do if my Oki ML620 has no power?
    • A
      Alex MartinAug 25, 2025
      If your Oki Printer has no power, check these possible causes: * Ensure the power cable is properly connected to both the power outlet and the printer. * Test the power outlet by plugging in another appliance to see if it works. There may be a power outage or an issue with the outlet itself.

Summary

Chapter 1: Introduction

Printer Features

Details the printer's reliability, paper handling, and print speed capabilities.

Chapter 2: Paper Handling

Loading Continuous Forms Paper

Step-by-step guide for loading continuous paper using rear, front, and bottom feeds.

Loading Cut Sheet Paper

Instructions for loading single sheets of paper using top and front feed paths.

Top of Form (TOF)

Explains how to set and adjust the initial print starting position on the page.

Setting the Paper Thickness Lever

Guide on adjusting the lever for optimal paper feeding based on thickness.

Chapter 3: Print Settings

Print Quality

Explains how to select and change print quality modes like Draft, HSD, SSD, and NLQ.

Character Pitch

Details how to adjust character pitch (CPI) and select proportional spacing.

Print Speed

Information on changing print speed settings to Normal, High Speed, Quiet, or High Copy.

Printer Reset

Procedure for resetting the printer to clear errors or restore default states.

Chapter 4: Menu Mode

Entering and Exiting Menu Mode

Step-by-step instructions for accessing and leaving the printer's configuration menu.

Resetting the Menu to the Factory Defaults

Procedure to restore all printer menu settings to their original factory default values.

Chapter 5: Maintenance

Replacing the Ribbon Cartridge

Detailed, step-by-step instructions for installing a new ribbon cartridge.

Clearing Paper Jams

Procedures for safely removing jammed paper from both continuous and cut sheet feeds.

Testing the Printer

Instructions for performing diagnostic print tests like Font Sample, Rolling ASCII, and Hexadecimal Dump.

Chapter 6: Troubleshooting

Responding to Alarm Conditions

Guidance on interpreting printer indicator lights and responding to alarm states.

Problems;Solutions

A comprehensive table listing common printer issues, their causes, and recommended solutions.

Oki ML620 Specifications

General IconGeneral
Color-
Maximum resolution288 x 72 DPI
Mean time between failures (MTBF)25000 h
Sound pressure level (printing)55 dB
Sound pressure level (quiet mode)52 dB
Standard interfacesUSB 2.0
Windows operating systems supportedWindows 2000, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Ultimate x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
AC input voltage120 V
Dimensions (WxDxH)438 x 375 x 191 mm

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