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Green rectangular circuit board with black connectors and silver components

Zebra Instruments

Zebra Instruments GK420D barcode printer main logic board USB Ethernet P1027135-016

SKU CH-FNNY-KQSRR MPN GK420D

Replacement main logic board for GK420D and GK420T desktop barcode printers with USB and Ethernet interfaces

  • Interface typeUSB / Ethernet
  • Printing methodDirect Thermal/Thermal Transfer Printer
  • Printer categoryDesktop
  • Replacement main logic board restores GK420D printer operation
  • USB and Ethernet interfaces enable wired network connectivity
  • Compatible with GK420D and GK420T desktop printers
  • Direct thermal and thermal transfer print technology supported
  • New OEM part number P1027135-016 ensures exact fit

Replacement main logic board

The Zebra Instruments GK420D main logic board (part number P1027135-016) is a new replacement circuit board for desktop barcode printers. It restores the printer's core processing and connectivity functions when the original board fails. The board supports both direct thermal and thermal transfer print technologies. It is designed for the GK420D and GK420T printer models.

Compatibility and interface fit

This board suits technicians repairing a GK420D or GK420T printer that requires USB and Ethernet connectivity. It does not suit printers that use only serial, parallel or wireless interfaces. Buyers needing a board for other Zebra desktop models or industrial printer series should verify the correct part number before ordering.

Part number P1027135-016

The catalogue part number P1027135-016 is the single specification that confirms fitment for the GK420D and GK420T printers. Matching this number to the printer's service documentation ensures the correct replacement. No other part number from the supplier data applies to this board.

How it compares

Measured against everything we stock in Thermal Label & Receipt Printers, at today’s prices. Recalculated every night.

Price $75.99
Cheaper than about 55% of the 849 comparable items (median $84.99).

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Specifications

Product
Brand nameZebra
Model nameGK420D & GK420T
Printer categoryDesktop
Ports & slots
Interface typeUSB / Ethernet
More details
Printing methodDirect Thermal/Thermal Transfer Printer

Questions about this item

Does this main logic board need a separate print mechanism to function?

Yes, the board is the controller for a GK420D or GK420T desktop printer; it requires the matching print engine, media sensors, power supply and enclosure to operate.

Will the USB and Ethernet ports on this board work with my existing GK420T that currently uses only a serial connection?

The board provides both USB and Ethernet interfaces, so a GK420T upgraded with this part gains those ports in addition to any legacy serial port the chassis already offers.

How can I confirm the board is communicating correctly after installation?

Power on the printer, connect via USB or Ethernet, and send a test label from the driver or Zebra Setup Utilities; a successful print and a solid network status light indicate the board is working.

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