Description
FANUC A20B-8002-0631 is a specific FANUC CNC system component, most commonly identified as a system inverter / power board associated with the CNC display hardware rather than a standard logic or CPU board.
📌 What it is
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Manufacturer: FANUC (used in industrial CNC controls and automation).
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Part type: Inverter / system power board module — often associated with the display subsystem (LCD inverter) or general system power circuitry in a FANUC CNC controller.
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Range / Category: Part of the FANUC NC / CNC hardware lineup.
🧩 Role in FANUC Systems
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According to FANUC Series 0 maintenance documentation, A20B-8002-0631 is listed as the inverter for the monochrome LCD display used in some controller backpanels.
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It’s distinct from boards like CPU modules or axis control cards — its main function is to power or regulate the display (LCD) electronics or act as a system power interface board rather than core motion/control logic.
🛠️ Where It’s Used
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Used inside FANUC CNC control cabinets for machine tools, typically in older or legacy Series 0i / 0i-Model controllers where separate inverter boards for displays were common.
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You’ll also find it sold through industrial parts resellers as a replacement spare or refurbished board for these systems.