FANUC A20B-8101-0402 Main PCB

Replacement Planning Overview

FANUC A20B-8101-0402 is identified as a Main PCB / Control Board for model-led purchasing. Buyers should compare the complete drawing number, including any suffix and revision printed on the original board.

Product Data Review

Available exact-model industry references agree that A20B-8101-0402 is a main PCB but differ in their configuration descriptions. Therefore, A3/A6 designations, display sizes and CNC-system compatibility are not presented here as confirmed manufacturer data.

System Match Review

Compare the complete drawing number, board revision, installed CPU and option modules, connector layout, display configuration, mounting position, host CNC model and installed software. A neighboring part number should not be treated as an automatic substitute.

If the original CNC remains operational, follow the appropriate procedure to back up the FANUC CNC parameters and preserve programs, SRAM data and other user files using a suitable FANUC all-data backup method before replacing the main PCB.

Send REACO CNC clear photos of the complete label, revision marks, installed modules and connectors together with the machine or control model. Visible identifiers can be compared before stock, condition, price and lead time are confirmed.

Replacement-Part Support

Browse related FANUC PCBs and control cards. Related listings are provided for product discovery and do not imply interchangeability.

If replacement is unavailable or the original main board may still be recoverable, REACO CNC also provides a professional FANUC PCB repair service, including fault inspection, component-level repair and functional testing.

• 100% Function Tested Before Shipment
• Worldwide DHL / UPS / FedEx Shipping
• Contact REACO CNC for Current Stock, Price and Lead Time