User Guide
Table Of Contents
- About This Document
- Contents
- Introduction
- Getting Started
- Print Operations
- Determining Printer Configuration
- Long Term Printer In-activity or Storage
- Thermal Printing
- Modes of Printing
- Print Media Types
- Replacing Supplies
- Adjusting the Print Width
- Adjusting the Print Quality
- Media Sensing
- Ribbon Overview
- Printing on Fan-Fold Media
- Printing with Externally Mounted Roll Media
- Fonts and Your Printer
- Stand Alone Printing
- Sending Files to the Printer
- Print Meter
- EPL Line Mode
- Printer Options
- Maintenance
- Troubleshooting
- Appendix: Interface Wiring
- Appendix: Dimensions
- Appendix: ZPL Configuration
Troubleshooting
Resetting the Factory Default Values
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980610-001 Rev. C GK420t™ User Guide 8/4/10
Resetting the Factory Default Values
Sometimes, resetting the printer to the factory defaults may solve some problems. Refer to the
four-flash sequence in Feed Button Modes on page 80 in this section.
Communications Diagnostics
If there is a problem transferring data between the computer and printer, try putting the printer
in the communications diagnostics mode. The printer will print the ASCII characters and their
respective hexadecimal values (a sample is shown below) for any data received from the host
computer. To find out how,
There are multiple ways to enter hex data dump mode:
•The ~JD ZPL command
•The dump EPL command
• On power up with the Feed button pressed. Refer to the power off mode procedure in Feed
Button Modes on page 80 in this section.
The printer will print ‘Now in DUMP’ (see below) and advance to the top of the next label.