Lenovo B490 Notebook - Manual (Page 75)

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 Media card reader slot 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