Lenovo Thinkpad X220 Schematic – Wistron Comet-1 H0227-1M Schematic 09/02/2019 by notebook Schematic for Lenovo Thinkpad X220 Tablet PC 2-1, Wistron Comet-1 Mainboard. Project Code: 91.4KJ01.01M PCB (Raw Card): H0227-1M Document Number: LCO-1 Rev: -1 Format: PDF Total Pages: 101 File size: 1.53MB $10.00 $9.90 – Add to Cart Checkout Added to cart