Zebra GX420t User's Guide download pdf (Page 86)

Maintenance

Replacing the Printhead

980612-001 Rev. A GX420t / GX430t User Guide 12/14/07

3. Use a blunt tipped tool to press the release tab on the right side and then the left side of the

printhead. The tool diameter can be from 0.10 to 0.15 inches (2.5 to 3.8 mm).

Insert the tool into the ribbon frame's printhead release access (the round) opening. Push

the release tab and gently pull the printhead bracket down..

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User Guide 1
Zebra GX420t / GX430t 1
FCC Compliance Statement 3
G Series Printers 3
Environmental Management 4
About This Document 5
Who Should Use This Document 6
Contacts 7
Document Conventions 8
Contents 9
Introduction 13
GX Series Thermal Printers 14
What’s in the Box? 15
Your Printer 16
Opening the printer 16
Printer Features 17
Moveable Blackline 18
Sensor (Option) 18
Media Cutter 18
(Option) 18
Operator Controls 19
Power Switch 19
Feed Button 19
Status Light 20
Closing the printer 21
Getting Started 23
Attaching Power 24
Loading Roll Media 25
Under Media 28
Loading Transfer Ribbon 29
Interface Cable Requirements 34
USB Interface Requirements 35
Serial Communications 36
EPL Y Command 37
Parallel Port 38
Ethernet 39
Print Operations 41
Thermal Printing 42
Modes of Printing 43
Print Media Types 43
Replacing Supplies 45
Adjusting the Print Width 46
Adjusting the Print Quality 46
Media Sensing 47
Ribbon Overview 48
Ribbon Scratch Test 49
Printing on Fan-Fold Media 50
Close the top cover 51
Fonts and Your Printer 53
Getting Asian Fonts 54
Stand Alone Printing 55
Sending Files to the Printer 56
Print Meter 58
Printer Options 59
Label Dispenser Option 60
4. Close the dispenser door 62
Black Marks 64
Cutter Option 66
Moveable Sensor 68
Off Center 68
Blackline Sensing Only 68
Default - Gap (Web) Sensing 68
Standard Operating Position 68
ZebraNet 70
~WL command 71
KDU — Printer Accessory 74
Serial Port 75
< Max. Current 76
Maintenance 77
Cleaning 78
Cleaning the Printhead 79
Media Path Considerations 80
Sensor Cleaning 81
Platen Bearings 82
Other Printer Maintenance 84
Replacing the Printhead 85
Status Light Descriptions 92
Print Quality Problems 94
^MN command in 95
O and Q commands in the EPL 95
Manual Calibration 97
Troubleshooting Tests 98
Troubleshooting 100
Communications Diagnostics 100
Feed Button Modes 101
Appendix 103
Parallel Interface 105
Ethernet Interface 106
Serial Port Interface 107

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Zebra GX420t User's Guide Page 86

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