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| Place of Origin | JAPAN |
| Brand Name | FANUC |
| Certification | CE ROHS |
| Model Number | A20B-1003-0760 |
A20B-1003-0760 is the kind of board that sits at the center of the control rather than at the edge of it. It is identified as a master board, a motherboard for 0-Mate C, and a 16-bit main board used in FANUC CNC systems.
This places it in the main control layer, where other boards connect into it and where core control functions are organized.
This board is not just another plug-in module.
It is described as the board that carries or supports multiple peripheral boards, including memory, axis, I/O, graphics, PMC, and additional expansion boards.
It is also described as storing system memory, ladder data, and programs while acting as the main board / PLC backplane in the control.
That combination makes it a true central-board replacement part rather than a secondary add-on PCB.
| Parameter | Value |
|---|---|
| Brand | FANUC |
| Part Number | A20B-1003-0760 |
| Model Number | A20B10030760 |
| Board Type | Master Board / Motherboard |
| Control Context | 0-Mate C |
| Bit Architecture | 16-bit |
| Functional Position | Main control board |
| Board Role | Main board / backplane for peripheral boards |
| Related Board Support | Memory, axis, I/O, graphics, PMC, additional boards |
This board is suited to main-board replacement in compatible FANUC control systems where the original 0-Mate C 16-bit architecture needs to be preserved.
It is especially relevant in legacy CNC repair, motherboard failure replacement, and control restoration work where the machine already relies on peripheral boards plugged into this central master PCB.
Because the board serves as the base for multiple connected boards, it is most useful when the rest of the control stack remains in the same family and the goal is to restore the original system layout rather than redesign it.
A20B-1003-0760 is the right kind of board to select when the issue is rooted in the main control platform and not in one peripheral board alone.
Its function as a 16-bit 0-Mate C master board makes it a more exact fit for central-board replacement than using a general motherboard description without checking the installed control family.
Q1. What type of board is the A20B-1003-0760?
It is a master board, also described as a motherboard for 0-Mate C and a 16-bit main board. It belongs to the central control layer of the CNC.
Q2. What does this board do in the system?
Its role is to act as the main control board that other boards connect into. It is described as supporting peripheral boards such as memory, axis, I/O, graphics, and PMC boards, and it also carries core control data such as system memory, ladder, and programs.
Q3. What should be checked when selecting A20B-1003-0760?
Confirm the exact part number, the 0-Mate C / compatible control family, and whether the installed control is built around this same master-board architecture. It is also important to verify the attached peripheral board layout before replacement.
Q4. How should the “16-bit master board” description be understood?
“16-bit” points to the control generation, while “master board” indicates that this PCB is the central motherboard rather than a plug-in sub-board. Both matter when matching a replacement, because the board has to fit both the control generation and the existing peripheral-board structure.
Q5. How should faults be diagnosed before replacing this board?
A practical approach is to separate a main-board fault from a single plug-in board fault. If multiple connected functions fail together, such as memory-side behavior, axis-board communication, or broader control instability, the master board becomes a stronger suspect than one peripheral PCB alone.
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