Lenovo G40-45 Hardware Maintenance Manual - Lenovo G40-30, G40-45, G40-70, Z40 - Page 59

Heat sink assembly

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 1120 Heat sink assembly For access, remove these FRUs in order: • "1010 Battery pack" on page 33 • "1020 Base cover" on page 34 • "1030 Optical drive" on page 36 • "1040 Hard disk drive" on page 37 • "1050 PCI Express Mini Card for wireless LAN" on page 39 • "1070 Fan assembly" on page 42 • "1080 Keyboard" on page 44 • "1090 Keyboard bezel" on page 47 • "1100 USB&audio board" on page 50 • "1110 System board" on page 52 Figure 12. Removal steps of heat sink assembly Remove the screws 1. 1 11 Step Screw (quantity) 1 M2 × 3.5 mm, flat-head, nylok-coated (7) (G40-30/G40-45/G40-70) CPU BKT to MB, GPU BKT to MB 1 M2 × 3.5 mm, flat-head, nylok-coated (6) (G40-70m/Z40-70/Z40-75) CPU BKT to MB, GPU BKT to MB Color Torque Black 1.5 ~ 2.0 kgf*cm Black 1.5 ~ 2.0 kgf*cm Lift the heat sink assembly in the direction shown by arrow 2. 2 55

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
1120 Heat sink assembly
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 33
•
“1020 Base cover” on page 34
•
“1030 Optical drive” on page 36
•
“1040 Hard disk drive” on page 37
•
“1050 PCI Express Mini Card for wireless LAN” on page 39
•
“1070 Fan assembly” on page 42
•
“1080 Keyboard” on page 44
•
“1090 Keyboard bezel” on page 47
•
“1100 USB&audio board” on page 50
•
“1110 System board” on page 52
Figure 12. Removal steps of heat sink assembly
Remove the screws
1
.
1
1
1
Step
Screw (quantity)
Color
Torque
1
M2 × 3.5 mm, flat-head, nylok-coated (7)
(G40-30/G40-45/G40-70)
CPU BKT to MB,
GPU BKT to MB
Black
1.5 ~ 2.0 kgf*cm
1
M2 × 3.5 mm, flat-head, nylok-coated (6)
(G40-70m/Z40-70/Z40-75) CPU BKT to MB, GPU
BKT to MB
Black
1.5 ~ 2.0 kgf*cm
Lift the heat sink assembly in the direction shown by arrow
2
.
2