Complete service manual, good quality scan, great buy !
Text excerpt from page 52 (click to view)
Service Guide OKIPAGE4w
Chapter 3 Parts Replacement
Top Cover Assy and Flat Cable Assy (1) Remove the upper cover assy. (See Upper Cover Assembly in this Chapter). (2) Remove the LED head. (See LED Head and Head Spring in this Chapter). (3) Press the left clamp outward and remove the engagement and top cover assy 1. (Tension spring 2 also comes off at the same time.) (4) Disconnect connector CN6 and remove flat cable assy 3. (5) Remove screw 5 and remove FG cable 4.