Lenovo ThinkPad 390X Hardware Maintenance Manual (March 1999): ThinkPad 390E o - Page 94

System Board

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System Board "Battery ASM" on page 62 "Hard Disk Drive" on page 63 "Combo Bay" on page 64 "Keyboard" on page 70 "LED Board" on page 72 "Upper Heatsink" on page 73 "CPU Board" on page 75 "LCD Panel ASM" on page 76 "Upper Cover ASM" on page 78 "IMM Lower Heatsink ASM" on page 80 "Fan ASM" on page 81 "Power Latch, IR Board, and DC-DC & BATT Board" on page 83 Note: See "Replacing the system Board" on page 61 before proceeding. Remove the two screws from the system board and gently remove the system board from the base cover ASM. Step Size (Quantity) Head & Color Torque 1 M2.5 x 6L (2) Pan head, 3.2 kgf-cm black Note: Make sure you use the correct screw for replacement. 84 ThinkPad 390E

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System Board
±
“Battery ASM” on page
62
±
“Hard Disk Drive” on page
63
±
“Combo Bay” on page
64
±
“Keyboard” on page
70
±
“LED Board” on page
72
±
“Upper Heatsink” on page
73
±
“CPU Board” on page
75
±
“LCD Panel ASM” on page
76
±
“Upper Cover ASM” on page
78
±
“IMM Lower Heatsink ASM” on page
80
±
“Fan ASM” on page
81
±
“Power Latch, IR Board, and DC-DC & BATT Board”
on page
83
Note:
See “Replacing the system Board” on page
61
before proceeding.
Remove the two screws from the system board and gently
remove the system board from the base cover ASM.
Step
Size (Quan-
tity)
Head &
Color
Torque
1
M2.5 x 6L (2)
Pan head,
black
3.2 kgf-cm
Note:
Make sure you use the correct screw for replacement.
84
ThinkPad 390E