Lenovo Thinkpad X280 Schematic & PCB Layout – LCFC NM-B521 Schematic & PCB Layout 02/12/202001/27/2020 by notebook Schematic & Boardview for Lenovo Thinkpad X280 Laptop/Notebook. LCFC NM-B521 Mainboard Tag: EX280 NM-B521 Rev: 0.3 (4.00) Format: PDF Total Pages: 94 File Size: 12.9MB $20.00 $9.90 – Add to Cart Checkout Added to cart