How do I troubleshoot feed button modes on the GX420t/GX430t?

Zebra Flash Sequence Settings

The following shows the flash sequences for the various reset functions on the Zebra label printers:

Power On Modes

With the printer power on and top cover closed, press and hold the Feed button for several seconds. The green status LED will flash a number of times in sequence. The explanation at the right (Action) shows what happens when you release the key after the start specific number of flashes and before the next flash sequence starts.

Flash Sequence

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Configuration Status - Prints a detailed printer configuration status label. The label can be used to verify printing, assist printer to computer communication configuration, maintenance, troubleshooting, and help us with customer care communications.

 

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Standard Auto Media Calibration - The printer detects and sets media type and media length, and it adjusts the media sensors for optimal perform ance with the installed media. The printer will feed one to four labels.
Note: Users familiar with the Zebra EPL desktop printer use this Feed mode to replace power-up AutoSensing calibration.

 

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Serial Port Configuration - Applies only to printers with serial interface ports.
To reset the communication parameters. Press and release the Feed button while the LED rapidly flashes amber and green. For autobaud synchronization: Send the ^XA^XZ command sequence to the printer while the LED rapidly flashes amber and green. When the printer and host are synchronized, the LED changes to solid green.
NOTE: No labels will print during autobaud synchronization.

 

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Factory Defaults - Resets the printer to the default factory settings and modes. See the configuration label for a list of the primary settings affected by this Feed Mode option. Other settings are exclusively set, viewed and controlled by programming are also reset. The printer then performs a standard media calibration.

 

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Print Width Adjustment - Prints a succession of boxes starting at the minimum print width and ending in the printer’s maximum print width in 4mm increments. Press the Feed button once when the printer has reached the desired maximum print width. Note that the printer driver and applications can override this setting.

 

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Print Darkness (Density) Adjustment - Prints a succession of barcode simulation patterns starting at the minimum darkness (print density/heat) and ending in the printer’s maximum darkness in increments of four (4) using the ZPL darkness setting range values. Press the Feed button once the pattern is clear and legible. Do not continue to increase the darkness setting. Bar code line widths may become distorted reducing readability. Note that the printer driver and applications can override this setting.

 

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Manual Media Calibration - The printer runs extensive tests to detect and set media type and media length, and then it adjusts the media sensors for optimal performance with the installed media. Manual calibration is recommended whenever you are using pre-printed media, print on the liner or if the printer will not correctly auto cali brate. A graphical profile of the media sensing will print.

 

If the Feed button remains pressed after a 8-flash sequence, the printer exits the configuration mode when the Feed button is released.

 

Source: “GX420t/GX430t User Guide” Zebra, https://support.zebra.com/cpws/docs/gseries/gseries_button_modes.pdf