Description
đź“Ś Description
The FANUC A20B‑8100‑0710 is a printed circuit board (PCB) used as the LCD backlight inverter in FANUC CNC control displays — specifically for 7.2″ monochrome LCD screens used in integrated and stand‑alone CNC operator panels such as the FANUC Series 16i, 18i, and 21i (i‑series) controls.
🧠Function
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LCD Backlight Inverter: Generates and regulates the power for the LCD display’s backlight in CNC monitor/MDI units. Without this board, the screen may not light up even if the controller powers on.
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Fitted In: FANUC integrated CNC control displays with 7.2″ monochrome LCD panels — often seen in 16i‑B, 18i‑B, 21i‑B, and 0i‑B series machines.
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Additional Role: In some implementations it also powers/display cooling or support connections within the display assembly. Removal or failure of this board can interrupt necessary connections (e.g., battery/SRAM link in integrated systems), so proper backups are recommended before servicing.
⚙️ Typical Use & Notes
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Installed inside the CNC display or integrated controller to provide consistent backlight power.
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Often replaced when a display goes dim, flickers, or loses backlight while the rest of the controller functions normally.
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Available as new, used, or refurbished units from industrial electronics suppliers.