FANUC A20B-3300-0283 is a display control card for a 7.2-inch monochrome LCD in compatible FANUC CNC systems. It supports graphic display operation and includes embedded Ethernet functionality for the documented control configuration.

FANUC maintenance documentation identifies this board as a 7.2-inch monochrome display control card with graphic function and embedded Ethernet. It is installed on the LCD-unit side and should not be confused with the LCD panel, inverter PCB, main CPU card or character-only display card.

A20B-3300-0283 Product Information

Graphic Display and Ethernet Functions

The A20B-3300-0283 processes display information for the associated 7.2-inch monochrome LCD and supports the documented graphic interface. Its embedded Ethernet function provides the network-control capability required by supported CNC configurations. Available communication features still depend on the installed CNC software, options and machine setup.

Related 7.2-Inch Display Cards

A20B-3300-0283 provides graphic display and embedded Ethernet. FANUC documents A20B-3300-0303 as a 7.2-inch monochrome character-only card, while A20B-3300-0301 is a related 7.2-inch monochrome card with embedded Ethernet. Similar display size does not establish interchangeability.

Compatibility and Replacement Checks

Confirm A20B-3300-0283 on the original PCB together with the CNC series, LCD size, main board, graphic and Ethernet software, connectors and installed options. Back up CNC data before service, isolate power and use anti-static precautions. Replacement should be completed by qualified CNC personnel.

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