Brother LB6770PRW Sewing Machine Instruction Manual (Model 6770PRW) - 172 Pages. Lost your sewing machine's manual? We've got you covered! This instruction manual is the ultimate guide to unlock the full potential of your Brother LB6770PRW. No more confusion or frustration—just clear, concise instructions right at your fingertips. What's inside? Everything you need to know from setting up to mastering your sewing machine and all its features.