Lexmark C720 Service Manual - Page 240

5024-001 Power Supply Unit (Low Voltage Power Supply LVPS) Removal 1. Remove the base cover (L). See "Base Cover (L) Removal" on page 4-20, for more information. 2. Remove the side F cover (L). See "Side F Cover (L) Removal" on page 4-11, for more information. 3. Remove the upper side cover. See "Upper Side Cover (L) Removal" on page 4-7, for more information. 4. Remove the side cover (L). See "Side Cover (L) Removal" on page 4-10, for more information. 5. Remove the rear cover. See "Rear Cover Removal" on page 4-16, for more information. 6. Remove the set screw ST3X6 (1) from the shield cover B. See the illustration "Main Engine (MCTL P.W.B.) Board Removal" on page 4-24, for location. 7. Remove the set screws ST3X6 (2) from the shield cover A. See the illustration "Main Engine (MCTL P.W.B.) Board Removal" on page 4-24, for location. 8. Remove the controller card. 9. Remove the set screws ST3X6 (2) from the side cover F and panel base. 10. Remove the switch. 11. Disconnect all harness connectors to the main engine (MCTL P.W.B.) board. 12. Remove side cover F. 13. Remove the screw F3X6 (1) from the controller fan assembly. 14. Remove the set screws ST3X6 (4) from the shield case A assembly. 15. Remove the shield case A assembly. 16. Remove the set screws ST3X6 (2) from the bottom stay (L). 17. Disconnect all harness connectors to the power supply unit (5). 18. Remove the set screw ST3X6 (2) from the inlet base. 19. Remove the set screw M4X6 (brass, with washer) from the ground wire. 20. Remove the set screws ST3X6 (2) from the power supply unit. 4-30 Service Manual