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A20B-8100-0410 | FANUC A20B-8100 Series CNC Control PCB — 041x Range / i-Series CNC Board / Japan

A20B-8100 — FANUC's i-Series CNC Main Board and Control PCB Series

The A20B-8100 series is one of FANUC's most significant PCB families — confirmed across this session to cover main CPU motherboards, communication option boards, and processing PCBs for multiple i-series CNC platforms. Confirmed examples within the series:

The A20B-8100-0410 at position 041x sits between the confirmed Series 160i/180i-A main CPU board (0400) and its MMX Pentium upgrade variant (0460) — placing it firmly within the i-series CNC main board zone of the A20B-8100 series.

Key Product Information

A20B-8100 Series Functions

Boards confirmed in the 041x zone of the A20B-8100 series serve central CNC control functions. The A20B-8100 series in the 040x–046x range covers main CPU motherboard variants — the central processing PCBs that execute CNC programmes, manage axis interpolation, and coordinate all CNC subsystems.

The Japan origin of A20B-8100-0410 confirms FANUC's domestic manufacturing origin for this PCB — consistent with FANUC's core CNC hardware production at their facilities in Japan.

Application Scenarios

i-Series CNC PCB fault: A FANUC i-series CNC develops control-level faults traceable to the A20B-8100-0410. The board is identified from its part number label. Replacement restores CNC control function.

Planned maintenance: A production facility maintaining FANUC i-series CNC equipment stocks A20B-8100-0410 as a spare for the specific system in which it is installed.

FAQ

Q1: How do I confirm A20B-8100-0410 is the correct board for my FANUC CNC?

Read the part number from the installed board's label. If it reads A20B-8100-0410, this is the confirmed replacement. Cross-reference with the applicable FANUC CNC hardware manual's board layout diagram and spare parts list to confirm the board's specific slot position and CNC platform.

Q2: What FANUC CNC platforms use A20B-8100 series boards in the 041x range?

The A20B-8100 041x range is positioned between confirmed Series 160i/180i-A main CPU boards (0400) and the MMX Pentium upgrade variant (0460). This places A20B-8100-0410 in the Series 160i/180i CNC generation — FANUC's high-specification PC-integrated CNC platform. Confirm the specific platform from the installed system's documentation.

Q3: After replacing A20B-8100-0410, does all CNC data need to be reloaded?

For main CPU board types in the A20B-8100 series, replacement requires a complete reload of all CNC data — programmes, axis parameters, servo parameters, PMC data, and tool offset data. Always maintain a current verified backup before any main board replacement. For communication or add-on PCBs, data reload requirements depend on the board's specific function.

Q4: What ESD and safety precautions apply when handling A20B-8100-0410?

Handle with a grounded anti-static wrist strap on an ESD-safe surface. Store in anti-static packaging. Power down the CNC system completely before accessing the control unit's internal boards. Follow the applicable FANUC i-series maintenance manual's board access procedures.