MacBook Air 13″ 2020 A2179 Schematic & Silkscreen – 820-01958 Schematic & Silkscreen 11/23/2020 by notebook Schematic & Silkscreen MacBook Air 13″ 2020 A2179. 820-01958 Mainboard Title: X1783 MLB-TKSB Part Number: 051-05232 / 820-01958 Format: PDF Total Pages: 87 File size: 6.52MB Content Type: VIP II (Corporative Membership Only)