Lenovo IdeaPad 720S-13IKB Schematic – LCFC DS321 NM-B331 Schematic 08/01/202205/19/2019 by notebook Schematic for Lenovo Ideapad 720S-13IKB Laptop/Notebook. LCFC DS321 NM-B331 mainboard Rev: 0.2 Format: PDF Total Pages: 61 Available for Gold Members in: September 5 Content Type: VIP II (Platinum Members Only)