The FANUC A20B-3300-0670 is a GUI and display-control card used in selected FANUC Series 30i-B, 31i-B and 32i-B CNC display units. It supports the graphical operator interface and coordinates display-related processing and peripheral communication within the host unit.

This board is not the CNC system's main CPU card. FANUC documentation identifies A20B-3300-0670 as the GUI card fitted to documented 10.4-inch and 15-inch display-control units. Compatibility depends on the complete A02B display-unit number, board revision, software and machine configuration.

A20B-3300-0670 Product Information

GUI and Display-Control Functions

The A20B-3300-0670 provides display-processing hardware, working memory, boot functions and peripheral control for the operator interface. Depending on the host display unit, related connections can include video, MDI, soft keys, USB, memory card, CompactFlash, HSSB, Ethernet, RS-232C, touch panel and inverter interfaces.

Compatibility and Replacement Checks

Match the complete A20B-3300-0670 number and board revision with the original. Also verify the A02B display-unit model, screen size, touch or non-touch configuration, main board, power-supply card, connectors, boot software and CNC options. Do not replace it with A20B-3300-0671 solely because both are GUI cards.

Testing and Installation Notes

REACO CNC checks the board label, revision, connectors, components, boot status, display output and available peripheral functions under an applicable test setup. Before replacement, isolate power, observe ESD precautions and back up CNC parameters, programs and machine data. Installation should be completed by qualified CNC personnel.

Related resources: FANUC PCB boards, FANUC drives and FANUC CNC repair services.