FANUC A20B-8200-0843 0i-D Main PCB A3U

Overview

The A20B-8200-0843 is a main PCB in the A20B-8200 family. It is listed as 0i-D MAIN PCB A3U, and one parts source identifies it more specifically as a main board A3U for 0i-Model D, including 0i-TD and 0i-MD applications.

Another service listing describes it as FS0I-D MAIN BOARD, confirming its role as a core control board within the 0i-D platform.

This board belongs at the center of the CNC hardware structure.

In practical repair work, boards in this position are replaced by exact model because they define the installed control platform, internal board-family arrangement, and feature set already used in the machine.

Listings also note that firmware or series details may matter, which is consistent with the way high-level CNC main boards are handled in service channels.

Technical Data

Applications

This board is suitable for installed FANUC 0i-D CNC systems where the controller already uses the A20B-8200-0843 main-board position.

It is especially relevant in 0i-TD and 0i-MD environments where the original control platform must remain unchanged during repair, refurbishment, or controller restoration.

Replacement Guidance

Before ordering, confirm the installed board code directly on the hardware and verify that the machine uses the A3U main-board version in the 0i-D family.

Because service channels also reference firmware or series selection, that detail should be checked before replacement, especially on systems where the main board carries model-specific options or hardware revisions.

FAQ

Q1: What kind of board is A20B-8200-0843?
It is a 0i-D Main PCB A3U, meaning it serves as a core control board in the 0i-D CNC platform.

Listings also identify it as a main board for 0i-TD and 0i-MD, which helps place it within the broader 0i-Model D family.

Q2: Why is the “A3U” designation important?
The A3U suffix distinguishes this board from other 0i-D main-board variants. In board-level service work, these version-level details matter because the installed hardware should remain aligned with the same board revision family already used in the machine.

Q3: What do the 40B0 PMC, 0043B ID, and USB notes tell you?
Those details appear in one parts listing and help distinguish this main-board version more precisely.

In maintenance work, board identifiers like these can help confirm that the installed hardware matches the correct replacement when multiple nearby models exist in the same family.

Q4: Is this a peripheral board or a platform board?
It is a platform board. Listings identify it as a main PCB / main board, which means it belongs to the core control layer of the CNC rather than to a peripheral function such as display, network communication, or auxiliary I/O.

Q5: What should be checked before buying?
Check the installed board code, confirm the control is 0i-D, verify that the board is A20B-8200-0843, and review any firmware or series requirements before ordering.

Those are the main checks that support a correct replacement decision for this model.