Zebra GK420t User Guide

VIF - Maintenance of computer systems

infrastructure

VIF-NA-BG-136, V3.0

COBISS, COMARC, COBIB, COLIB, IZUM are registered trademarks owned by IZUM.

CONTENTS

1 Introduction ......................................................................................................... 1

2 Using the GK420t printer .................................................................................... 1

2.1 Description of the printer ................................................................................................. 1

2.2 Connecting to power supply and installing printer .......................................................... 3

2.3 Cleaning the printhead ..................................................................................................... 4

2.4 Placing the media roll and loading black ribbon cartridge .............................................. 5

2.5 Resetting printer ............................................................................................................... 7

2.6 Status light ........................................................................................................................ 7

3 Installing driver .................................................................................................... 8

4 Printer settings (for COBISS3) .......................................................................... 10

5 Setting logical destinations in COBISS3 ........................................................... 13

6 Potential printing problems ............................................................................... 15

6.1 Printing an extra blank label .......................................................................................... 15

6.2 Printing an extra blank label .......................................................................................... 17

Zebra GK420t User Guide VIF

ii © IZUM, 18. 4. 2016, VIF-NA-BG-136, V3.0

FIGURES

Figure 1: Back side of the printer.................................................................................................... 1

Figure 2: Front side of the printer ................................................................................................... 1

Figure 3: Opening the printer .......................................................................................................... 2

Figure 4: Closing the printer ........................................................................................................... 2

Figure 5: Printhead .......................................................................................................................... 2

Figure 6: Connecting to power supply ............................................................................................ 3

Figure 7: USB connection ............................................................................................................... 3

Figure 8: Serial connection ............................................................................................................. 4

Figure 9: Cleaning the printhead ..................................................................................................... 5

Figure 10: Opening the printer and placing the media roll ............................................................. 5

Figure 11: Pushing the media under the media guides ................................................................... 6

Figure 12: Loading black ribbon cartridge ..................................................................................... 6

Figure 13: Final loading of the black ribbon cartridge ................................................................... 7

Figure 14: Selecting the right model (GK420t) .............................................................................. 9

Figure 15: Selecting the right software package with drivers for GK420t ................................... 10

Figure 16: Control Panel with Devices and Printers ..................................................................... 11

Figure 17: Printing settings ........................................................................................................... 11

Figure 18: Advance printing settings ............................................................................................ 12

Figure 19: Colour dithering.......................................................................................................... 12

Figure 20: COBISS3 user interface .............................................................................................. 13

Figure 21: Local destinations editor.............................................................................................. 13

Figure 22: Setting local destinations ............................................................................................. 14

Figure 23: Detailed settings .......................................................................................................... 14

Figure 24: Refreshing settings in the COBISS3 user interface ..................................................... 15

Figure 25: Setting the printer ........................................................................................................ 16

Figure 26: Sending factory settings .............................................................................................. 16

Figure 27: Printer settings ............................................................................................................. 17

Figure 28: Media calibration ......................................................................................................... 18

VIF Zebra GK420t User Guide

1 Introduction

This document presents how the GK420t printer is used in the COBISS system (connecting to

power supply, changing paper, etc.).

2 Using the GK420t printer

2.1 Description of the printer

Power switch

Figure 1: Back side of the printer

FEED button and status light

Figure 2: Front side of the printer

FEED Button – In normal operating mode, the label ribbon advances to the next label.

Status light – In normal operating mode the status light is green. If it turns red, an error has

occurred: the printer either ran out of label ribbon or black ribbon cartridge or the service is

needed because of a more complex error.

Power switch

Power OFF Power ON

Power switch

Power off

Power ON

FEED

button

Status

light

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Opening and closing the printer

Figure 3: Opening the printer

Figure 4: Closing the printer

Printhead position

Figure 5: Printhead

VIF Zebra GK420t User Guide

2.2 Connecting to power supply and installing printer

To connect your printer to a computer use the serial cable or the USB cable supplied with the

printer.

Connecting to power supply

Figure 6: Connecting to power supply

USB connection

Figure 7: USB connection

USB cable

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Serial connection

Figure 8: Serial connection

The printer comes with a serial and a USB interface. To connect the printer use the appropriate

cable.

During installation you can use the drivers available:

 on CD supplied with your printer,

 via http://www.zebra.com/id/zebra/na/en/index/products/printers/desktop/gk420t.4.tabs.html,

 via http://www.seagullscientific.com/downloads/drivers/archive/7.2/7.2/Zebra_7.2.exe,

To use the printer from several workstations, it is recommended to connect it only to one

workstation enabling shared use of the printer to other workstations. For help, call +386 (0)2

2520 333 (Call center) or send an email to [email protected].

2.3 Cleaning the printhead

To clean the printhead, use the cleaning pen supplied with your printer containing the cleaning

solution. Use the cleaning pen tip to remove debris and dust that has built-up on the heater

element of the thermal printhead.

The cleaning pen can be used only once and make sure that you use it only for this purpose. If

you use it once again, the contaminants from previous uses may damage the printhead. Instead of

a cleaning pen, you can also use a soft cloth and pure alcohol.

VIF Zebra GK420t User Guide

Figure 9: Cleaning the printhead

2.4 Placing the media roll and loading black ribbon

cartridge

Go through the following steps of the procedure:

1. Open the printer lid. Place the media roll on the green roll holder.

Figure 10: Opening the printer and placing the media roll

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2. The media roll must go under both media guides.

Figure 11: Pushing the media under the media guides

3. Place a new ribbon roll on the inner holder. Then, place an empty ribbon core, remained

from the ribbon, on the front holder. Pay attention to lock the notches of the ribbon core

properly. Attach the adhesive strip of the black ribbon cartridge to the empty ribbon core.

Prior to use, pull the ribbon cartridge tight across the printhead.

Figure 12: Loading black ribbon cartridge

Under media

guides

VIF Zebra GK420t User Guide

Figure 13: Final loading of the black ribbon cartridge

2.5 Resetting printer

Once the media roll is placed and the black ribbon cartridge loaded, go through the following

steps (make sure that the printer’s cover is closed and the status light is green):

1. Turn off the printer.

2. Press and hold the FEED button.

3. Turn on the printer.

4. The green status light flashes in sequences: once, then in the two-flash-, three-flash- and

four-flash sequence.

5. Release the FEED button after the four-flash sequence.

6. The printer starts calibration process and advances the label ribbon to the next label.

7. Once the calibration process is complete, turn off and on the printer.

2.6 Status light

Colour

Status

Explanation and solution

None

Printer is turned off.

Green

Solid green

Normal functioning

Orange

Solid orange

It lights up for about ten seconds

immediately after the printer is turned on.

If it lasts for more than ten seconds, the

printer requires service.

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Colour

Status

Explanation and solution

Green

Flashing

Normal functioning

Red

Flashing

Labels or ribbon cartridge ran out.

Green

Double flashing

The printer is idle.

Orange

Double flashing

The printerhead is overheated.

Green and red

Alternately flashing

Flash memory is not programmed, the

printer requires service.

Red and green

Flashing twice red and

then once green

The printhead or motor has a failure, the

printer requires service.

Table 1: Status light

3 Installing driver

If the original or the latest version of the driver for Zebra GK420t is not installed on your local

computer, which is connected to the printer, install the driver or upgrade it. Drivers are available

on Zebra’s official web page

http://www.zebra.com/id/zebra/na/en/index/drivers_downloads.html or on the user’s CD

supplied with your printer.

When the downloading web page opens, select GK420t Desktop Printer from the Printer Support

drop-down list (see Figure 14).

VIF Zebra GK420t User Guide

Figure 14: Selecting the right model (GK420t)

Then, select the Drivers tab and click Download under "Zebra Setup Utilities" to download the

drivers to your computer (see Figure 15).

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Figure 15: Selecting the right software package with drivers for GK420t

Before downloading the driver package, the confirmation window will open and ask if you agree

to the specified terms. Click the field to start the download:

After the package has been downloaded, run the package (administrator privileges are required

for the installation of drivers) and follow the instructions (select ZDesigner GK420t if asked for

which printer model you wish to install the driver).

4 Printer settings (for COBISS3)

Once you have installed the drivers, update Zebra GK420t printer settings before you start

printing labels. Go to Control Panel and select Devices and Printers. All available printers are

VIF Zebra GK420t User Guide

displayed. Select ZDesigner GK420t and right-click the icon. Select Printing Preferences from

the option list (see Figure 16).

Figure 16: Control Panel with Devices and Printers

When you click Printing Preferences, a new window will appear in which you can set up

parameters as illustrated in Figure 17. In the Options tab, pay particular attention to fields in the

red boxes.

Figure 17: Printing settings

Zebra GK420t User Guide VIF

Once you set up parameters under the Options tab, click the Advanced Settings tab and make

sure that Thermal Transfer is selected under "Media Type" (see Figure 18).

Figure 18: Advance printing settings

At the end, check if Smooth is selected under the Dithering tab (see Figure 19).

Figure 19: Dithering

VIF Zebra GK420t User Guide

5 Setting logical destinations in COBISS3

In COBISS3, select a printer for printing labels for the material in logical destinations. Select

System/Settings/Logical destinations (see Figure 20).

Figure 20: COBISS3 user interface

A new Local destinations editor window will open in which you will select Label – material:

[default local printer] and click Edit (see Figure 21).

Figure 21: Local destinations editor

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The User destinations window will open in which you will click Add printer. In the new

window select ZDesigner GK420t from the drop down list which you intend to use to print labels

for the material (see Figure 22).

Figure 22: Setting local destinations

Once you select the printer, click the Details button to check if these detailed settings are correct

for this type of printer (as shown in Figure 23):

Figure 23: Detailed settings

When all settings are set, click the OK button to confirm each choice. At the end, in the System

menu, select Refresh settings (see Figure 24). If this option is not available, refresh the newly

configured settings by first logging out and then logging in to the COBISS3 software.

VIF Zebra GK420t User Guide

Figure 24: Refreshing settings in the COBISS3 user interface

Now, you can start printing labels for the material.

6 Potential printing problems

6.1 Printing an extra blank label

If labels cannot be printed properly after installing the drivers and setting the logical destinations

(e.g. printing an extra blank label), the factory settings should be sent to the printer via original

drivers.

The procedure is as follows: Go to Control Panel and click the Devices and Printers icon.

Find the printer, that is the Designer GK420t icon and right-click on it.

Select Printer properties from the list of options. A new window should pop up in which you

will click the Preferences... button (see Figure 25).

Zebra GK420t User Guide VIF

Figure 25: Setting the printer

By clicking the Preferences… button a new window with additional settings should pop up

again, then select the Tools tab (see Figure 26).

Figure 26: Sending factory settings

VIF Zebra GK420t User Guide

Select Action under Command type and Load factory defaults under Command Name, then

click the Send button. This command sends the default factory settings to the printer. After that

retry printing a label.

6.2 Printing an extra blank label

If the settings do not resolve problems with an extra blank label, you can try with label

calibration. You can use this method even if the printer prints one extra blank label besides the

label for the material.

The procedure is as follows: go to the Control panel and click the Devices and Printers icon.

Find the printer, that is the Designer GK420t icon and right-click on it. Select Printer properties

from the drop-down menu.

When a new window pops up, click the Preferences... button (see Figure 27).

Figure 27: Printer settings

By clicking the Preferences… button a new window with additional settings should pop up

again, then select the Tools tab (see Figure 28).

Zebra GK420t User Guide VIF

Figure 28: Media calibration

Select Action under Command type and Calibrate media under Command name as shown in

Figure 28. By clicking the Send button new re-calibration parameters are sent to the printer.

After that retry printing a label.