1 PC Used Fanuc A20B-3300-0301 Board In Good Condition A20B33000301 A2OB-33OO-O3O1

FANUC A20B-3300-0301 Display Module PCB with Ethernet

Some CNC parts are purely internal. The A20B-3300-0301 is not one of them.

It is commonly described as a display module, character display card with Ethernet, or video control module, built around a 7.2-inch monochrome format.

Public listings also describe it as a graphics driver PCB and a plug-in module used within FANUC control assemblies.

That gives this model a more visible role than a standard logic board.

It sits closer to interface, display handling, and operator-side control presentation, which is why exact identification is especially important. 

If the existing machine still uses the same monochrome display architecture and matching board reference, replacing the module with the correct part number helps preserve the original interface behavior without forcing wider control changes.

Confirmed Product Parameters

Replacement Perspective

For this model, the most useful pre-order check is not only the part number, but also the screen type and communication description already present in the installed unit.

Because this board is tied to the display side of the control, matching the original monochrome and Ethernet-related configuration can be more important than using a broader “compatible display board” label. 

That makes A20B-3300-0301 a better candidate for exact-reference sourcing than generalized substitution.

FAQ

Q1. What type of board is the A20B-3300-0301?
The A20B-3300-0301 is best identified as a display module or character display card with Ethernet. It is also described as a video control module, with a 7.2-inch monochrome display context.

These repeated labels place it clearly on the display and operator-interface side of the CNC hardware.

Q2. What role does this board play in the system?
This board serves as a display-side control module. The recurring “character display card,” “display module,” and “video control module” wording indicates that it is tied to screen-side output and interface handling rather than to servo, power, or PMC control functions.

The Ethernet note adds interface-level identity to that display role.

Q3. What should be checked when selecting this display board?
The most useful points to confirm are the exact part number A20B-3300-0301, the repeated character display card with Ethernet wording, and the 7.2-inch monochrome display context.

These are the key identifiers that separate this module from other FANUC display-side boards.

Q4. How should the 7.2-inch mono and Ethernet specifications be understood?
The 7.2-inch monochrome note should be read as the board’s display context, while Ethernet should be read as part of the module’s interface identity.

Together, these details provide a much more precise technical profile than a broad “display PCB” description and make the board easier to distinguish from similar display modules.

Q5. What is most important to confirm before replacement?
Before replacement, the most important items are the full part number, the repeated display module / character display card with Ethernet wording, and the 7.2-inch monochrome screen context.

For display-side boards, these visible and model-linked identifiers are usually the most reliable way to confirm the correct board.