Lenovo B490 Hardware Maintenance Manual - Page 75

DC-in connector and base cover, Removal steps of speaker assembly

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Removal steps of speaker assembly Remove the screws 1 . Then remove the speaker assembly 2 . 1 2 1 1 2 1 Step 1 Screw (quantity) M2.5 × 5.7 mm, flat-head, nylon-coated (4) 1200 DC-in connector and base cover For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid state drive" on page 50 • "1080 Backup battery" on page 51 • "1090 Keyboard" on page 51 • "1100 Keyboard bezel" on page 54 • "1130 Microphone assembly" on page 58 • "1140 I/O board" on page 59 • "1150 System board assembly and USB board" on page 60 • "1180 LCD unit" on page 66 • "1190 Speaker assembly" on page 68 Color Black Torque 4.0 kgf-cm Chapter 7. Removing and replacing a FRU 69

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Removal steps of speaker assembly
Remove the screws
1
. Then remove the speaker assembly
2
.
2
1
1
2
1
1
Step
Screw (quantity)
Color
Torque
1
M2.5 × 5.7 mm, flat-head, nylon-coated (4)
Black
4.0 kgf-cm
1200 DC-in connector and base cover
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 44
•
“1020 Bottom slot cover” on page 44
•
“1030 Optical drive” on page 45
•
“1040 Memory modules” on page 46
•
“1050 Hard disk drive assembly” on page 47
•
“1060 PCI Express Mini Card for wireless LAN” on page 49
•
“1070 mSATA solid state drive” on page 50
•
“1080 Backup battery” on page 51
•
“1090 Keyboard” on page 51
•
“1100 Keyboard bezel” on page 54
•
“1130 Microphone assembly” on page 58
•
“1140 I/O board” on page 59
•
“1150 System board assembly and USB board” on page 60
•
“1180 LCD unit” on page 66
•
“1190 Speaker assembly” on page 68
Chapter 7
.
Removing and replacing a FRU
69