Lenovo B50-45 Hardware Maintenance Manual - Lenovo B50-xx, B50-30 Touch Notebo - Page 57

Lenovo B50-30/B50-30 Touch/B50-45/B50-70 1140 Fan and heat sink assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 33 • "1020 Optical drive" on page 34 • "1030 Bottom slot cover" on page 36 • "1040 Hard disk drive" on page 37 • "1050 DIMM" on page 39 • "1060 PCI Express Mini Card for wireless LAN/WAN" on page 40 • "1070 Keyboard" on page 41 • "1080 Keyboard bezel" on page 43 • "1110 Led board" on page 48 • "1130 System board" on page 50 Figure 14. Removal steps of fan and heat sink assembly Disconnect the fan connector in the direction by arrow a. Remove the screw b and six screws c. Then remove the fan and heat sink in the direction as shown by arrow d. 3 3 3 3 4 2 3 1 Step Screw (quantity) 7 d b M2 x 5 mm, flat‐head, nylok‐coated (1) 7 d c M2 x 3 mm, flat‐head, nylok‐coated (6) Color Torque Silver 1.5~2.0kgf.cm Black 1.0~1.5kgf.cm When installing: Make sure that all the fan and DC‐IN connectors are attached firmly. 53