Lenovo B490 Notebook - Manual (Page 64)

Removal steps of power board
Remove the screw 1 and then remove the power board 2 .
2
1
Step Screw (quantity) Color Torque
1 M2 × 3 mm, flat-head, nylon-coated (1) Black 1.85 kgf-cm
1130 Microphone assembly
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
• “1090 Keyboard” on page 51
• “1100 Keyboard bezel” on page 54
Removal steps of microphone assembly
Detach the connector 1 , and then remove the microphone assembly in the direction shown by the arrow 2 .
1
2
When installing: Ensure that the connector is attached firmly to the system board.
58 Hardware Maintenance Manual