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Citizen CLP-621 - User Manual

Citizen CLP-621
60 pages
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CLP-621 & CLP-631
Thermal Transfer Barcode & Label Printer
USER'S MANUAL

Other manuals for Citizen CLP-621

Questions and Answers

  • V
    Valerie JohnsonJul 26, 2025
    Why is my Citizen Barcode Reader not printing neatly?
    • C
      Christina SweeneyJul 26, 2025
      If your Citizen Barcode Reader is not printing neatly, ensure that the media and ribbon are correctly set. Adjust the printing density using the menu or control software. If the platen is dirty, clean it with ethyl alcohol; if it is deformed, it should be replaced. Consult with the dealer that supplied the printer concerning the replacement.
  • J
    Jonathan BergJul 30, 2025
    What to do if Citizen Barcode Reader feeds paper but does not print?
    • R
      Robert MillerJul 30, 2025
      If your Citizen Barcode Reader is feeding paper but not printing, check if the thermal printhead is dirty or has a label stuck to it. Clean any dirt with the provided head cleaner. Remove any stuck labels, using a soft cloth soaked in ethyl alcohol for adhesive residue. Ensure you are using the recommended ribbon or one of the same type.
  • O
    obradleyAug 3, 2025
    Why does the printing position change on my Citizen Barcode Reader?
    • G
      grosskristinAug 3, 2025
      If the printing position changes on your Citizen Barcode Reader, make sure the media and ribbon are correctly set. Clean the platen with ethyl alcohol if it's dirty, and replace it if deformed. Check the software and communication status set by the host computer if an error message appears. Ensure the correct menu values are set using the operating panel or host computer. Adjust the media sensitivity to appropriate values, and if the problem persists, change the 'Sensor level' in the 'System setup'.
  • K
    kleintonyaAug 8, 2025
    How to troubleshoot LED not lighting up on Citizen Barcode Reader?
    • K
      Katrina SullivanAug 8, 2025
      If the LED on your Citizen Barcode Reader doesn't light up when you connect the power, ensure the power cord is correctly plugged into both the electrical outlet and the printer's power inlet. Check that the outlet is receiving power, and verify the building's power supply. If the power cord is damaged, replace it with one specifically designed for the printer. If necessary, replace the main fuse in the building’s fuse box, and reset the main breaker. Ask a qualified serviceman to carry out the replacement.
  • E
    Elizabeth ScottAug 12, 2025
    How to fix wrinkled ribbon on Citizen Barcode Reader?
    • E
      elliottronaldAug 12, 2025
      If the ribbon is wrinkled in your Citizen Barcode Reader, adjust the tension and left-right balance using the ribbon tension and balance adjustment knobs. Also, set the appropriate printing density using the menu or control software. If the issue persists, use the recommended products or equivalent; otherwise, contact a service representative.
  • J
    Jeff ClarkAug 17, 2025
    What to do if the ribbon slips on Citizen Barcode Reader?
    • S
      Shelby JonesAug 17, 2025
      If the ribbon slips (and ribbon dirt is produced) on your Citizen Barcode Reader, adjust the tension using the ribbon tension adjustment knob.
  • B
    Bryan MendezAug 20, 2025
    How to fix ribbon not winding on Citizen Barcode Reader?
    • M
      Matthew MasonAug 21, 2025
      If the ribbon does not wind in your Citizen Barcode Reader, ensure the ribbon is set in the correct course and that the winding direction is correct.

Summary

Important Safety Instructions

Safety Precautions and Warnings

Warning and Caution Definitions

Explains the meaning of warning and caution symbols and provides specific instructions to avoid hazards.

General and Installation Precautions

Precautions When Installing the Printer

Details general safety measures and specific precautions for safe printer installation and operation.

1 Setup Guide

Connecting the Printer to Power

Provides step-by-step instructions for connecting the printer to a power source safely.

Driver and Software Installation

Guides the user on installing printer drivers and software on the computer for proper operation.

Connecting the Printer to a Computer

Explains how to connect the printer to a computer using serial, parallel, or USB interfaces.

2 Printer Operation

Installing the Media

Provides step-by-step instructions for loading and positioning the media roll within the printer.

Setting Sensor Positions

Explains how to set transparent and reflective sensors for accurate media detection.

3 Printer Adjustments

Adjusting the Transparent Sensor

Provides detailed steps for adjusting the transparent sensor for optimal media detection.

Adjusting the Reflective Sensor

Provides detailed steps for adjusting the reflective sensor to detect black marks accurately.

Media Thickness Adjustment

Explains how to adjust media thickness using a dial to improve print quality.

Media Width Adjustment

Details how to adjust media width using a dial to balance head pressure for consistent print quality.

Adjusting the Ribbon - Tension Control

Explains how to adjust ribbon tension to prevent wrinkles or slippage, with criteria for different widths.

Adjusting the Ribbon - Balance Control

Guides on adjusting ribbon balance using knobs to correct wrinkles and looseness.

Cleaning the Printhead and Platen

Provides instructions on cleaning the thermal printhead and platen using a head cleaner and ethyl alcohol.

4 Troubleshooting Guide

Troubleshooting Power and Printing Issues

Offers checks for power connection issues and common printing problems like no printing or paper feeding.

Troubleshooting Print Quality and Ribbon Issues

Provides steps for print quality, position changes, wrinkled ribbons, and ribbon slippage.

Appendixes and Specifications

Replacing the Printer Interface Board

Gives step-by-step instructions on how to replace the printer's interface board with precautions.

Citizen CLP-621 Specifications

General IconGeneral
USB portNo
RS-232 interfaceYes
Optional connectivityEthernet
USB 1.1 ports quantity1
USB 2.0 ports quantity0
Connectivity technologyWired
Flash memory2 MB
CertificationUL, C-UL, FCC class A, CCC, CE Marking
Internal memory8 MB
Number of fonts2
Built-in barcodesPDF417, UPC-A, UPC-E
Built-in processor32 Bit RISC
Mean cycles between failures (MCBF)1000
Power consumption2400 mA
Power requirements100 - 240V, 50 / 60Hz
Compatible operating systemsWindows 2000, XP, Vista
Core diameter25.4 mm
Ribbon length360 m
Media thickness0.0635 - 0.254 mm
Maximum label length812 m
Maximum roll diameter127 mm
Supported paper width19.5 - 118 mm
Weight and Dimensions IconWeight and Dimensions
Depth114 mm
Width91 mm
Height104 mm

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