Zebra Technologies GC420d User Manual

Zebra® GC420d™

Desktop Thermal Printer

User Guide

ii

P1052685-001 GC420d™ User Guide 5/23/2012

©2012 ZIH Corp. GC420,GC420d, ZBI, ZBI 2.0, ZBI-Developer, Uni-Ribbon,
ZebraDesigner, ZebraNet, EPL, EPL2, ZPL, ZPL II, OpenACCESS and all product names
and numbers are Zebra trademarks, and Zebra, the Zebra head graphic, ZPL, ZPL II,
Element Energy Equalizer circuit, E3 Circuitand, and ZebraNet are registered trademarks
of ZIH Corp. All rights reserved. All other trademarks are the property of their respective
owners.

iii

This product may contain ZPL®, ZPL II®, and ZebraLink™ programs; Element Energy

3

Equalizer™ Circuit; E

®; and Monotype Imaging fonts. Software ©ZIH corp. All rights

reserved worldwide.

All rights reserved worldwide.Monotype®, Intellifont® and UFST® are trademarks of
Monotype Imaging, Inc. registered in the United States Patent and Trademark Office and
may be registered in certain jurisdictions.

CG Triumvirate is a trademark of Monotype Imaging, Inc. and may be registered in some
jurisdictions.

TrueType® is a trademark of Apple Computer, Inc. registered in the United States Patent
and Trademark Office and may be registered in certancertain jurisdictions.

Proprietary Statement

This manual contains proprietary information of Zebra Technologies Corporation and its
subsidiaries (“Zebra Technologies”). It is intended solely for the information and use of
parties operating and maintaining the equipment described herein. Such proprietary
information may not be used, reproduced, or disclosed to any other parties for any other
purpose without the express written permission of Zebra Technologies.

Product Improvements

Continuous improvement of products is a policy of Zebra Technologies. All specifications
and designs are subject to change without notice.

Liability Disclaimer

Zebra Technologies takes steps to ensure that its published Engineering specifications and
manuals are correct; however, errors do occur. Zebra Technologies reserves the right to
correct any such errors and disclaims liability resulting therefrom.

Limitation of Liability

In no event shall Zebra Technologies or anyone else involved in the creation, production,
or delivery of the accompanying product (including hardware and software) be liable for
any damages whatsoever (including, without limitation, consequential damages including
loss of business profits, business interruption, or loss of business information) arising out
of the use of, the results of use of, or inability to use such product, even if Zebra
Technologies has been advised of the possibility of such damages. Some jurisdictions do
not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you.

Canadian DOC Compliance Statement

This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

5/23/2012 GC420d™ User Guide P1052685-001

iv

FCC Compliance Statement

This device complies with Part 15 rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause

undesired operation.

This equipment has been tested and found to comply with the limits for Class B Digital
Devices, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a residential
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the product manuals, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television
reception, the user is encouraged to do one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.

• Consult the dealer or an experienced RF service technician for help.

The user is cautioned that any changes or modifications not expressly approved by Zebra
Technologies could void the user’s authority to operate the equipment. To ensure compliance,
this printer must be used with fully shielded communication cables.

Environmental Management

Do not dispose of this product in unsorted municipal waste. This product is recyclable, and
should be recycled according to your local standards.

For more information, please see our website at:

Web address: www.zebra.com/environment

P1052685-001 GC420d™ User Guide 5/23/2012

About This Document

This section provides you with contact information, document structure and organization, and
additional reference documents.

Contents

Who Should Use This Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

How This Document Is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

5/23/2012 GC420d™ User Guide P1052685-001

vi

Who Should Use This Document

Who Should Use This Document

This User Guide is intended for use by any person who needs to operate or to troubleshoot
problems with the printer.

How This Document Is Organized

The User Guide is set up as follows:

Section Description

Introduction on page 1 This section describes what you get in your

Getting Started on page 9 This section describes how to set up your printer

shipping box and provides an overview of printer
features. This section also has procedures that
describe how to open and close the printer and
report any problems.

for the first time and use the most common
operating procedures for loading media.

Print Operations on page 25 This section provides media and print handling,

font and language support, and the set up of less
common printer configurations.

Printer Options on page 39 This section covers the common printer options

and accessories with brief descriptions and how to
get you started using or configuring your printer
option or accessory.

Maintenance on page 47 This section provides routine cleaning and

maintenance procedures.

Troubleshooting on page 59 This section provides information about printer

error reporting that you might need for printer
troubleshooting. Assorted diagnostic tests are
included.

Appendix: Interface Wiring
on page 73

Appendix: Dimensions on page 77 This section provides external printer dimensions

Appendix: ZPL Configuration

on page 81

This section provides additional interface
information and wiring diagrams to assist with
printer to host system integration (typically a PC).

for the standard printer and printer with options.

This section briefly covers printer configuration
and includes a cross-reference to ZPL printer
configuration commands.

P1052685-001 GC420d™ User Guide 5/23/2012

Contacts

Contacts

vii

Technical Support via the Internet is available 24 hours per day, 365 days per year.

Web Site: www.zebra.com
E-mail Back Technical Library:

E-mail address: [e-mail]
Subject line: Emaillist

Self Service Knowledge Base: www.zebra.com/knowledgebase
Online Case Registration: www.zebra.com/techrequest

Which Department

Do You Need?

Regional Headquarters Zebra Technologies Corporation

475 Half Day Road, Suite 500
Lincolnshire, IL 60069 USA

T: [phone]
Toll-free [phone]
F: [phone]

Technical Support

For questions on the
operation of Zebra
equipment and software,
please call your distributor.
For additional assistance,
contact us.

Please have your model and
serial numbers available.

Repair Service
Department

For back-to-base service
and repair.

Technical Training
Department

For Zebra product training
courses.

Inquiry Department

For product literature and
distributor and dealer
information.

Customer Service
Department (US)

Internal Sales
Department (UK)

For printers, parts, media,
and ribbon, please call your
distributor or contact us.

Key:

T: Telephone
F: Facsimile
E: E-mail

T: +1 877 ASK ZEBRA (275 9327)
F: [phone]

Hardware: [e-mail]
Software: [e-mail]

Kiosk printers:

T: [phone]
E: [e-mail]

T: +1 877 ASK ZEBRA (275 9327)
F: [phone]

E: [e-mail]

To request a repair in the U.S.,
go to www.zebra.com/repair

T: [phone]
T: [phone]
F: [phone]

E: [e-mail]

T: +1 877 ASK ZEBRA (275 9327)

E: [e-mail]

T: +1 877 ASK ZEBRA (275 9327)

E: [e-mail]

The Americas

.

Europe, Middle East,

and Africa

Zebra Technologies Europe
Limited
Dukes Meadow
Millboard Road
Bourne End
Buckinghamshire, SL8 5XF
United Kingdom

T: [phone]
F: [phone]

T: [phone]
F: [phone]

E: [e-mail]

T: [phone]
F: [phone]

New requests: [e-mail]
Status updates:

[e-mail]

T: [phone]
F: [phone]

E: [e-mail]

T: [phone]
F: [phone]

E: [e-mail]

T: [phone]
F: [phone]

E: [e-mail]

Asia Pacific

and India

Zebra Technologies Asia Pacific
Pte. Ltd.
120 Robinson Road
#06-01 Parakou Building
Singapore 068913

T: + 65 6858 0722
F: [phone]

T: [phone]
F: [phone]

E: China: [e-mail]

All other areas:

[e-mail]

T: [phone]
F: [phone]

E: China: [e-mail]

All other areas:

[e-mail]

T: + 65 6858 0722
F: [phone]

E: China: [e-mail]

All other areas:

[e-mail]

E: China:

[e-mail]

All other areas:

APACChannelmarketing@zebra.c
om

T: [phone]
F: [phone]

E: China: [e-mail]

All other areas:

[e-mail]

5/23/2012 GC420d™ User Guide P1052685-001

viii

Document Conventions

Document Conventions

The following conventions are used throughout this document to convey certain information.

Alternate Color (online only) Cross-references contain hot links to other sections in this
guide. If you are viewing this guide online in .pdf format, you can click the cross-reference
(blue text) to jump directly to its location.

Command Line Examples Command line examples appear in Courier New font. For
example, type

Files and Directories File names and directories appear in Courier New font. For
example, the

Icons Used

Caution • Warns you of the potential for electrostatic discharge.

ZTools to get to the Post-Install scripts in the bin directory.

Zebra<version number>.tar file and the /root directory.

Caution • Warns you of a potential electric shock situation.

Caution • Warns you of a situation where excessive heat could cause a burn.

Caution • Advises you that failure to take or avoid a specific action could result in physical

harm to you.

Caution • (No icon) Advises you that failure to take or avoid a specific action could result in

physical harm to the hardware.

Important • Advises you of information that is essential to complete a task.

Note • Indicates neutral or positive information that emphasizes or supplements important

points of the main text.

Example • Provides an example, often a scenario, to better clarify a section of text.

P1052685-001 GC420d™ User Guide 5/23/2012

Contents

• About This Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Who Should Use This Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

How This Document Is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Document Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

• Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

1 • Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

GC420d™ Thermal Printers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unpack and Inspect the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Your Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operator Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 • Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Attaching Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Loading Roll Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Preparing Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Placing the Roll in the Media Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Printing a Test (Printer Configuration) Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Pre-install Windows® Printer Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connecting your Printer to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Interface Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

After Your Printer is Connected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3 • Print Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Determining Printer Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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Long Term Printer In-activity or Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Thermal Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Modes of Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Print Media Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Determining Thermal Media Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Replacing Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Adjusting the Print Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Adjusting the Print Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Media Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Printing on Fan-Fold Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Printing with Externally Mounted Roll Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Fonts and Your Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Localizing the Printer with Code Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Identifying Fonts in Your Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Stand Alone Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Sending Files to the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Print Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

EPL Line Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4 • Printer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Label Dispenser Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Zebra® KDU — Printer Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

KDU Plus™ — Printer Accessory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

ZBI 2.0™ — Zebra Basic Interpreter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5 • Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Cleaning the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Media Path Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Platen Cleaning and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Other Printer Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Replacing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

6 • Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Status Light Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Status Light Error Resolutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Print Quality Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Manual Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

P1052685-001 GC420d™ User Guide 5/23/2012

Troubleshooting Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Printing a Configuration Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Recalibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Resetting the Factory Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Communications Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Feed Button Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

A • Appendix: Interface Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Universal Serial Bus (USB) Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Ethernet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Serial Port Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

B • Appendix: Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

External GK Printer Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

C • Appendix: ZPL Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Managing Printer Configuration with ZPL Programming. . . . . . . . . . . . . . . . . . . . . . . . . . 92

ZPL Configuration Status to Command Cross-reference . . . . . . . . . . . . . . . . . . . . . . . . . 93

Printer Memory Management and Related Status Reports . . . . . . . . . . . . . . . . . . . . . . . 96

ZPL Programming for Memory Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

xi

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Notes • ___________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

P1052685-001 GC420d™ User Guide 5/23/2012

1

Introduction

This section describes what you get in your shipping box and provides an overview of printer
features. This includes procedures that describe how to open and close the printer and report
any problems.

Contents

GC420d™ Thermal Printers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unpack and Inspect the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Your Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operator Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5/23/2012 GC420d™ User Guide P1052685-001

2

GC420d™ Thermal Printers

GC420d™ Thermal Printers

The Zebra® GC420d™ model is the best value in a desktop thermal printer. The GC420d™
printer provides direct thermal printing at speeds up to 4 ips (inches per second) at a 203 dpi
(dots per inch) print density. The GC420d™ supports both ZPL™ and EPL™ Zebra printer
programming languages and a wide variety of interface and feature options.

The GC420 printers feature:

• Automatic printer language detection and switching between ZPL and EPL
programming and label formats.

• OpenAccess™ design for simplified media loading.

• Color-coded operator controls and media guides.

• Zebra™ Global Printing Solution – supports Microsoft Windows keyboard encoding
(and ANSI), Unicode UTF-8 and UTF 16 (Unicode Transformation Formats), XML,
ASCII (7 and 8 bit used by legacy programs and systems), basic single and double
byte font encoding, Hexadecimal encoding, and custom character maps (DAT table
creation, font linking, and character remapping).

• Improved printer performance: faster print speeds and a 32-bit processor.

• A complete suite of free software applications and drivers to configure printer
settings, design and print labels and receipts, get printer status, import graphics and
fonts, send programming commands, update firmware, and download files. Clone
printer settings and send graphics, files, fonts, and firmware (updates) to one or more
Zebra® Ethernet and locally connected printers with ZebraNet™ Bridge.

• Maintenance reporting enabled and customizable by the user.

• The GC420 direct thermal printer models also include support for Line Mode printing
to support EPL1 legacy programming based printing applications.

The GC420 printers offer these basic printer options:

• Label Dispense (Peel-Off).

• Zebra® ZBI 2.0™ (Zebra BASIC Interpreter) programming language. ZBI™ allows
you to create custom printer operations that can automate processes, use peripherals
(i.e. scanners, scales, keyboards, Zebra® KDU or KDU Plus™, etc.) all without being
attached to a PC or network.

This user’s guide provides all the information you need to operate your printer on a daily basis.
To create label formats, refer to your programming guides or label design applications such as
ZebraDesigner™.

Your printer, when connected to a host computer, functions as a complete system for printing
labels and tags.

Note • Many printer settings may also be controlled by your printer’s driver or label design

software. Refer to the driver or software documentation for more information.

P1052685-001 GC420d™ User Guide 5/23/2012

What’s in the Box?

Power Cord

varies by locale or region

Documentation

and Software

Power

Supply

Printer

Save the carton and all packing materials in case you need to ship or store the printer later.
After unpacking, make sure you have all parts. Follow the procedures for inspecting the
printer to familiarize yourself with printer parts so you can follow the instructions in this book.

What’s in the Box?

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Unpack and Inspect the Printer

When you receive the printer, immediately unpack it and inspect for shipping damage.

• Save all packing materials.

• Check all exterior surfaces for damage.

• Open the printer and inspect the media compartment for damage to components.

If you discover shipping damage upon inspection:

• Immediately notify the shipping company and file a damage report. Zebra
Technologies Corporation is not responsible for any damage to the printer incurred
during shipment, and will not cover the repair of this damage under its warranty
policy.

• Keep all packaging material for shipping company inspection.

• Notify your authorized Zebra

®

reseller.

4

Interface

Connectors

Feed

Button

Status

Light

Release
Latches

Release
Latches

DC Power

Receptacle

Power

Switch

Fan-Fold Media Entry Slot

What’s in the Box?

Your Printer

Opening the printer

To access the media compartment, you must open the printer. Pull the release latches towards
you and lift the cover. Check the media compartment for loose or damaged components.

Caution • The discharge of electrostatic energy that accumulates on the surface of the

human body or other surfaces can damage or destroy the printhead or electronic
components used in this device. You must observe static-safe procedures when working
with the printhead or the electronic components under the top cover.

P1052685-001 GC420d™ User Guide 5/23/2012

Printer Features

Label-Taken

Sensor

Peel Bar

Platen

Roller

Dispenser Option

BlackLine

Sensor

Gap

Sensor

Roll Holder and

Media Guides

Head-Up Sensor

(inside)

Pinch Roller

Dispenser Door

(open)

Printhead

Media

Guides

Media Guide

Adjustment

What’s in the Box?

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6

Power OFF Power ON

Power Switch

Power Switch

What’s in the Box?

Operator Controls

Power Switch

Press up to turn ON or down to turn OFF the printer.

Caution • The printer power should be turned off before connecting or disconnecting the

communications and power cables.

Feed Button

• Tap the Feed button once to force the printer to feed one blank label.

• Press the Feed button to take the printer out of a “pause” condition. The printer is put into
“pause” by either a programming command or an error condition. See What the Status
Light is Telling You on page 60 in the Troubleshooting chapter.

• Use the Feed button for printer setup and status (see Feed Button Modes on page 70 in the
Troubleshooting chapter).

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Status Light

Feed

Button

Status

Light

Located on the top case next to the feed button, the status light functions as a printer
operational indicator (see Status Light Descriptions on page 60).

What’s in the Box?

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8

What’s in the Box?

Closing the printer

1. Lower the top cover.

2. Press down until the cover snaps closed.

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2

Getting Started

This section describes how to set up your printer for the first time and use the most common
operating procedures for loading media.

Contents

Attaching Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Loading Roll Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Printing a Test (Printer Configuration) Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Pre-install Windows® Printer Drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connecting your Printer to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

After Your Printer is Connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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Attaching Power

Attaching Power

Important • Set up your printer so that you can handle the power cord easily if needed. To

make certain the printer cannot carry electrical current, you must separate the power cord
from the power supply receptacle or AC electrical outlet.

Caution • Never operate the printer and power supply in an area where they can get wet.

Serious personal injury could result!

1. Make sure the printer’s power switch is in the off position (down).

2. Insert the AC power cord into the power supply.

3. Plug the other end of the cord into an appropriate AC electrical outlet. Note: The active

power light will go on if power is on at the AC outlet.

4. Insert the power supply’s power connector into the printer’s power receptacle.

Printer

Plug Varies
by Country

AC
Power
Cord

Power

Switch

Power

Receptacle

Power
Connector

Active Power

Light

Power
Supply

IEC 60320-C

Note • Ensure the appropriate power cord with a three (3) prong plug and an
IEC 60320-C5 connector are used at all times. These power cords must bear the
relevant certification mark of the country in which the product is being used.

5

P1052685-001 GC420d™ User Guide 5/23/2012

Loading Roll Media

When you load media, you must place the roll onto the media hangers.

You must use the correct media for the type of printing you require.

Preparing Media

Whether your roll media is inside or outside wound, you load it into the printer the same way.

• Remove the outside length of media. During shipment, handling, or storage, the roll may
become dirty or dusty. Removing the outside length of media avoids dragging adhesive or
dirty media between the printhead and platen.

Loading Roll Media

11

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Loading Roll Media

Placing the Roll in the Media Compartment

1. Open the printer. Remember that you need to pull the release latch levers toward the front

of the printer.

2. Open the media guides by turning the media guide adjustment knob toward the rear of the

printer.

P1052685-001 GC420d™ User Guide 5/23/2012

Loading Roll Media

3. Pull the media roll holders open with your free hand and place the media roll on the roll

holders and release. Orient the media roll so that its printing surface will face up as it
passes over the platen (drive) roller.

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Loading Roll Media

4. Pull the media so that it extends out of the front of the printer. Thread the media under the

media guides.Verify the roll turns freely. The roll must not sit in the bottom of the media
compartment. Verify that the media’s printing surface is facing up.

5. Close the media guides by turning the guide adjuster knob to the front. They should just

touch, but not restrict. the edges of the media.

6. Close the printer. Press down until the cover snaps closed.

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Printing a Test (Printer Configuration) Label

Printing a Test (Printer Configuration) Label

Before you connect the printer to your computer, make sure that the printer is in proper
working order.

You can do this by printing a configuration status label.

1. Make sure the media is properly loaded and the top cover of the printer is closed. Then,

turn the printer power on if you have not already done so. If the printer initializes with the
status light blinking green (pause mode), press the Feed button once to set the printer in
Ready (to print) mode. See the Troubleshooting on page 59 if the printer’s status light
does not turn solid green (Ready).

2. Press the Feed button two to three times to allow the printer to calibrate the printer for the

installed media. The printer may feed several labels during this process.

3. When the status light is solid green, press and hold the Feed button until the status light

flashes once.

4. Release the Feed button. A configuration label will print.

If you cannot get this label to print, refer to Getting Started on page 9.

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16

Pre-install Windows® Printer Drivers

Pre-install Windows® Printer Drivers

Zebra is changing the way you install and use your printer with your Windows based PC
systems. We recommend that at minimum, the ZebraDesigner™ Windows® driver be pre­installed to take advantage of the advancements in ease of use and simplicity of the Windows
operating systems since the release of Windows XP® SP2.

Zebra provides the Zebra Setup Utilities (ZSU); a suite of Zebra® printer drivers, utilities, and
communications and installation tools for use with most Windows PC operating systems.
Zebra Setup Utilities and Zebra Windows printer drivers are available on the user’s CD and the
Zebra web site (www.zebra.com) for latest versions.

ZebraDesigner™ Driver and Zebra Setup Utilities (includes the driver): Supports Windows
7®, Windows Vista®, Windows XP®, Windows® 2000®, Windows Server® 2008, and
Windows Server® 2003 operating systems. The driver supports 32 bit and 64 bit Windows
operating systems and is Microsoft Certified. Zebra Setup Utilities and the ZebraDesigner
driver support the following printer communication interfaces: USB, parallel, serial, Wired
and Wireless Ethernet and Bluetooth (using a Bluetooth virtual printer port).

Install the Zebra Setup Utilities before applying power to the printer connected to the PC
(running a Zebra driver supported Windows operating system). The Zebra Setup Utility will
prompt you to apply the printer power. Continue to follow the instructions to complete your
printer installation.

Plug’N’Play (PnP) Printer Detection and Windows® operating systems

More recent Windows operating systems automatically detect the printer when it is connected
via the USB interface. Depending on the hardware configuration and the Windows version,
your printer may be Plug-and-Play (PnP) detected when connecting to the USB, parallel, or
serial port interfaces. The printer drivers do not support serial port PnP installation at this
time.The printer’s PC interface configuration for the parallel port must support and have
bidirectional communications for PnP operations.

The operating system automatically starts a “Add new hardware’ wizard when connecting the
printer for the first time to the PC. If you have pre-loaded the driver suite with the Zebra Setup
Utility, then the printer driver will automatically install. Go to your Windows printer directory
and right-click and select ‘Properties’. Click on the ‘Print test page’ button to verify a
successful installation.

The Windows operating system will detect and re-link a previously installed printer if it is
reconnected to the USB interface or if printer power is turned on after the PC has finished its
restart of the operating system. Ignore the new device detected warnings and close the Task bar
prompts. Wait several seconds for the operating system to match the printer to the driver
software. The warnings will quit and the printer now should be ready to begin printing.

P1052685-001 GC420d™ User Guide 5/23/2012

Pre-install Windows® Printer Drivers

Universal Serial Bus (USB) Device Communications

The printer is a terminal device (not a host or hub) when using a USB interface. You can refer
to the USB Specification for details regarding this interface.

Scanners, scales or other data input (terminal) devices must use the serial port (not the USB
port) to send data to the printer.

Serial Port and Windows® operating systems

The Windows operating system default settings for the serial port communication closely
match the printer’s defaults settings with one exception; the data Flow Control settings. The
Windows default data Flow Control setting is NONE. The printer requires data Flow Control
set to Hardware.

®

Note • The printer does not support Windows

Serial Port Plug and Play (PnP) device

detection at this time.

Ethernet

17

This printer option has a variety of methods and utilities to assist with printer connection and
configuration of networked Zebra printers on a LAN (local area network) or WAN (wide area
network). The Zebra Setup Utility configuration wizards support creating a connection to the
printer on a shared network with Windows based systems by using the printer’s IP address.
The printer includes internal Web pages to provide easy access to printer and network
configuration. The web pages are accessible via the printers IP address using any web browser.
The free version of ZebraNet™ Bridge software allows you to centrally deploy, manage, and
monitor your Zebra® printers with automatic Zebra® printer discovery up to 3 printers from a
single PC screen anywhere on your global network. ZebraNet™ Bridge Enterprise is available
for purchase to manage larger numbers of Zebra® printers.

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Connecting your Printer to a Computer

Connecting your Printer to a Computer

The printer support a variety of interface options and configurations. These include: Universal
Serial Bus (USB) interface, RS232 Serial and Parallel (IEEE 1284.4).

• USB, Serial and Parallel

The Zebra Setup Utility is designed to assist you with installing these interfaces. The
cabling and unique parameters for each of these physical printer communication interfaces is
discussed in the following pages to assist you with making configuration setup choices prior to
and immediately following applying power. The Zebra Setup Utilities configuration wizards
will instruct you to turn the printer’s power on at the appropriate time to complete the
installation of your printer.

Caution • Keep the power switch in the OFF position when attaching the interface cable.

The power cord must be inserted into the power supply and the power receptacle on the
back of the printer before connecting or disconnecting the communications cables.

Interface Cable Requirements

Data cables must be of fully shielded construction and fitted with metal or metallized
connector shells. Shielded cables and connectors are required to prevent radiation and
reception of electrical noise.

To minimize electrical noise pickup in the cable:

• Keep data cables as short as possible (6 foot [1.83 m] recommended).

• Do not tightly bundle the data cables with power cords.

• Do not tie the data cables to power wire conduits.

.

Important • This printer complies with FCC “Rules and Regulations,” Part 15, for Class B

Equipment, using fully shielded data cables. Use of un-shielded cables may increase radiated
emissions above the Class B limits.

P1052685-001 GC420d™ User Guide 5/23/2012